Vol. 55 June 2018 Vol. 56 July 2018 Vol. 58 2018 Vol. 59 2018 Vol. 60 December 2018     Clinical Biomechanics / Gefen, Amit . Vol. 59 Mention de date :  2018 Paru le :  01/11/2018

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Knee motion and muscle activation patterns are altered in hip osteoarthritis: The effect of severity on walking mechanics / Derek Rutherford in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 1-7 Titre : Knee motion and muscle activation patterns are altered in hip osteoarthritis: The effect of severity on walking mechanics Type de document : Article Auteurs : Derek Rutherford ; Lindsey Buckingham ; Janice Moreside Article en page(s) : p. 1-7 Langues : Anglais (eng) Descripteurs : HE Vinci Coxarthrose ; Electromyographie ; Genou Mots-clés : Osteoarthritis  Hip  Biomechanical Phenomena  Phénomènes biomécaniques  Knee  Gait  Démarche  Electromyography Résumé : Background Knee function is impaired in individuals with moderate hip osteoarthritis. How this extends to those undergoing total hip arthroplasty is unknown despite the common requirement for knee arthroplasty in this population. The study purpose was to determine whether sagittal plane knee joint movements and quadriceps and hamstring activation patterns differ between individuals with either moderate or severe unilateral hip osteoarthritis, and between ipsilateral and contralateral knees. Methods 20 individuals with moderate osteoarthritis and 20 with severe osteoarthritis were recruited. Sagittal knee motion and surface electromyograms from the hamstrings and quadriceps were collected during treadmill walking at a self-selected speed. Principal component analysis captured amplitude and temporal sagittal plane motion and EMG waveform features. Student's t-tests and Analysis of Variance determined between group differences and within/between group leg differences. Findings The severe groups' contralateral knee was in greater flexion at initial contact and demonstrated a movement profile of a longer stance phase (p  Interpretation Altered kinematics and muscle activity could contribute to a greater mechanical demand on the contralateral knee in those with more severe hip osteoarthritis. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155922 [article]

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Impact of multilevel joint contractures of the hips, knees and ankles on the Gait Profile score in children with cerebral palsy / Sarah J. Holmes in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 8-14 Titre : Impact of multilevel joint contractures of the hips, knees and ankles on the Gait Profile score in children with cerebral palsy Type de document : Article Auteurs : Sarah J. Holmes ; Anita J. Mudge ; Elizabeth A. Wojciechowski Article en page(s) : p. 8-14 Langues : Anglais (eng) Descripteurs : HE Vinci Paralysie cérébrale Mots-clés : Cerebral Palsy  Gait  Démarche  Walking  Marche à pied  Contracture  Range of Motion  Articular  Amplitude articulaire Résumé : Background Children with cerebral palsy are at risk of developing muscle contractures, often contributing to pain, structural deformities and mobility limitations. With the increasing use of gait indices to summarise the findings of three dimensional gait analysis (3DGA), the purpose of this study is to determine whether there is a relationship between multilevel joint contractures and the Gait Profile Score in children with cerebral palsy. Methods The Gait Profile Score, calculated from 3D gait analysis, and passive range of motion, strength and spasticity of the hips, knees and ankles in the sagittal plane were measured in 145 children with cerebral palsy (mean age:11 years,4 months; SD:2 years,10 months) (83 males) enrolled in the NSW Paediatric Gait Analysis Service Research Registry from 2011 to 2016. The relationships between these physical measures and the Gait Profile Score were explored using bivariate and multivariate correlations. Findings Reduced hip extension, knee extension and ankle dorsiflexion (knee extended) range of motion were correlated with a higher (worse) Gait Profile Score (r = −0.348 to −0.466, p  Interpretation The Gait Profile Score is a sensitive measure for demonstrating the relationship between multilevel sagittal plane joint contractures and kinematic gait. Clinically, this supports the use of the Gait Profile Score as a simplified measure to understand the contribution of contractures to functional gait limitations. Monitoring knee flexion strength, and hip extension and ankle dorsiflexion (knee extended) range of motion may assist clinicians in prioritising interventions to improve gait in this population. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155923 [article]

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Is it possible to predict falls in older adults using gait kinematics? / Nise Ribeiro Marques in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 15-18 Titre : Is it possible to predict falls in older adults using gait kinematics? Type de document : Article Auteurs : Nise Ribeiro Marques ; Deborah Hebling Spinoso ; Bruna Carvalho Cardoso Article en page(s) : p. 15-18 Langues : Anglais (eng) Descripteurs : HE Vinci Kinésithérapie (spécialité) ; Mobilité réduite ; Vieillissement Mots-clés : Biomechanical Phenomena  Phénomènes biomécaniques  Aging  Physical Therapy Specialty  Mobility Limitation Résumé : Background Gait kinematic parameters have been reported as an important clinical tool to assess the risk of falls in older adults. However, the ability of these parameters to predict falls in the older population is still unclear. Objective To identify the ability that gait kinematic parameters present to predict fall in older adults. Methods Data from 102 older adults, who live in a community setting, were considered for this study. For data collection, older subjects had to walk on a 14 meter-walkway in their preferred gait speed. The incidence of falls was recorded at baseline together with gait kinematics and then every three months during the period of the study. The ability of gait kinematic parameters to predict falls was tested using the ROC curve. Results Stance time variability, swing time, and stride length presented a sensitivity to predict falls in older adults higher than 70%. Conclusion Gait kinematic parameters, such as stance variability, swing time, and stride length may predict future falls in older adults. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155924 [article]

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Strain behavior of malaligned cervical spine implanted with metal-on-polyethylene, metal-on-metal, and elastomeric artificial disc prostheses – A finite element analysis / Wen-Ming Chen in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 19-26 Titre : Strain behavior of malaligned cervical spine implanted with metal-on-polyethylene, metal-on-metal, and elastomeric artificial disc prostheses – A finite element analysis Type de document : Article Auteurs : Wen-Ming Chen ; Jie Jin ; Taehyung Park Article en page(s) : p. 19-26 Langues : Anglais (eng) Descripteurs : HE Vinci Rachis Mots-clés : Spine  Total Disc Replacement  Remplacement total de disque Résumé : Background Postoperative alterations in cervical spine curvature (i.e. loss of lordotic angle) are frequently observed following total disc replacement surgery. However, it remains unclear whether such changes in lordotic angle are due to preoperative spinal deformities and/or prostheses design limitations. The objective of the study is to investigate strain and segmental biomechanics of the malaligned cervical spine following total disc replacement. Methods Three disc prostheses were chosen, namely a metal-on-polyethylene, a metal-on-metal, and an elastomeric prosthesis, which feature different geometrical and material design characteristics. All discs were modelled and implanted into multi-segmental cervical spine finite element model (C3-C7) with normal, straight and kyphotic alignments. Comparative analyses were performed by using a hybrid protocol. Findings The results indicated that as the spine loses lordotic alignment, the prosthesis with elastomeric core tends to produce significantly larger flexion range of motion (difference up to 6.1°) than metal-on-polyethylene and metal-on-metal prostheses. In contrast, when the treated spine had normal lordotic alignment, the range of motion behaviors of different prostheses are rather similar (difference within 1.9°). Large localized strains up to 84.8% were found with the elastomeric prosthesis, causing a collapsed anterior disc space under flexion loads. Interpretation Changes in cervical spinal alignments could significantly affect the surgical-level range of motion behaviors following disc arthroplasty; the in situ performance was largely dependent on the designs of the artificial disc devices in particular to the material properties. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155925 [article]

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Contribution of minimally invasive bone augmentation to primary stabilization of the osteosynthesis of Schatzker type II tibial plateau fractures: Balloon vs bone tamp / T. Vendeuvre in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 27-33 Titre : Contribution of minimally invasive bone augmentation to primary stabilization of the osteosynthesis of Schatzker type II tibial plateau fractures: Balloon vs bone tamp Type de document : Article Auteurs : T. Vendeuvre ; M. Grunberg ; A. Germaneau Article en page(s) : p. 27-33 Langues : Anglais (eng) Descripteurs : HE Vinci Interventions chirurgicales mini-invasives Mots-clés : Tibial Fractures  Fractures du tibia  Schatzker type II  Minimally Invasive Surgical Procedures Résumé : Background Schatzker type II tibial plateau fractures necessitate the least invasive treatment possible. Arthroscopic reduction by bone tamp followed by osteosynthesis is the current gold standard for this type of tibial plateau fracture. The objective of this study was to compare this technique to anterior approach tuberoplasty with balloon reduction. The comparison criteria were residual articular step off, metaphyseal cavity volume formed during reduction, and mechanical strength to separation and to depression displacement. Methods Fractures were created on 12 human cadaveric tibiae and reduced by a minimally invasive approach in six specimens by a balloon, and by bone tamp in the six others. Articular step off and metaphyseal-epiphyseal cavity volume were measured by TDM. Mechanical tests were performed up to assembly failure to characterize structural strength. Secondary displacements, fracture depression displacement and separation were measured by optical methods. Findings There was no significant difference in step off measurement after balloon reduction or bone tamp (0.29 cm vs 0.37 cm; p = 0.06). The cavity volume formed by balloon reduction was significantly smaller than the volume created by bone tamp reduction (0.45 cm3 vs 5.12 cm; p = 0.002). The compressive load required for assembly failure was significantly greater in the balloon group than in the bone tamp group (1210.17 N vs 624.50 N; p = 0.015). Interpretation There exists a correlation between load to failure of the assembly frame and the metaphyseal volume required for bone fracture reduction. The minimally invasive balloon technique has fewer negative effects on the osseous stock, thereby enabling better primary structural strength of the fracture. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155926 [article]

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The effects of vibro-medical insole on sensation and plantar pressure distribution in diabetic patients with mild-to-moderate peripheral neuropathy / Masumeh Bagherzadeh Cham in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 34-39 Titre : The effects of vibro-medical insole on sensation and plantar pressure distribution in diabetic patients with mild-to-moderate peripheral neuropathy Type de document : Article Auteurs : Masumeh Bagherzadeh Cham ; Mohammad Ali Mohseni-Bandpei ; Mahmood Bahramizadeh Article en page(s) : p. 34-39 Langues : Anglais (eng) Descripteurs : HE Vinci Complications du diabète ; Vibration Mots-clés : Diabetes Complications  Peripheral Nervous System Diseases  Neuropathies périphériques  Stochastic Processes  Processus stochastiques  Foot Ulcer  Ulcère du pied Résumé : Background The first aim of this study was to determine the effect of a vibro-medical insole on pressure sensation and the second was to measure the effects of a vibro-medical insole with and without random noise on plantar pressure distribution in diabetic patients with mild-to-moderate peripheral neuropathy. Methods Twenty patients with mild-to-moderate diabetic neuropathy were recruited in the clinical trial pre-test, post-test study. A medical insole was made for each participant and a vibratory system was inserted into it. Pressure sensation was evaluated before and after the 30-min walk using the vibro-medical insole with added random noise by Semmes-Weinstein Monofilaments. Peak pressure data was measured before and after 30-min walking with a vibro-medical insole with and without random noise by the Pedar-x system. Findings Pressure sensations showed improvement after 30-min walking with the vibro-medical insole with added random noise at the heel, metatarsophalangeal heads and hallux of both feet in all participants (p  Interpretation Thirty minute walking with a vibro-medical insole seems to improve pressure sensation and alter peak pressure in diabetic patients with mild-to-moderate peripheral neuropathy. This work suggests that vibro-medical insoles can be used for daily living activities and possibly decreases the risk of ulceration in diabetic neuropathy patients. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155927 [article]

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Relative phase measures of intersegmental coordination describe motor control impairments in children with cerebral palsy who exhibit stiff-knee gait / James J. Carollo in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 40-46 Titre : Relative phase measures of intersegmental coordination describe motor control impairments in children with cerebral palsy who exhibit stiff-knee gait Type de document : Article Auteurs : James J. Carollo ; Kate Worster ; Zhaoxing Pan Article en page(s) : p. 40-46 Langues : Anglais (eng) Descripteurs : HE Vinci Genou ; Paralysie cérébrale Mots-clés : Cerebral Palsy  Gait  Démarche  Knee Résumé : Background The purpose of this retrospective study was to explore lower limb intersegmental coordination as a clinically important indicator of motor control mechanisms in individuals with cerebral palsy exhibiting stiff-knee gait. We used the relative phase of thigh and foot segments around foot-off to describe motor control, given the relevance of the pre-swing phase of gait to the existence of stiff-knee gait. Methods Traditional gait parameters and thigh/foot intersegmental coordination were calculated using pre-and postoperative kinematic data from a cohort of 54 subjects (92 legs) with spastic cerebral palsy. All participants had stiff-knee gait, walked without assistive devices, and underwent rectus femoris transfer surgery to improve swing period knee flexion. Analyses included correlations between a) preoperative intersegmental coordination and gait variables (knee flexion range, rate and gait performance) and b) pre-to-postoperative intersegmental coordination change and change in gait variables. Findings Thigh/foot intersegmental coordination significantly (P  Interpretation Intersegmental coordination is a clinically important factor in knee flexion limitations associated with stiff-knee gait for individuals with cerebral palsy. These findings are a foundation for further study of intersegmental coordination measures as complements to traditional instrumented gait analysis. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155928 [article]

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The effects of an articulated ankle-foot orthosis with resistance-adjustable joints on lower limb joint kinematics and kinetics during gait in individuals post-stroke / Toshiki Kobayashi in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 47-55 Titre : The effects of an articulated ankle-foot orthosis with resistance-adjustable joints on lower limb joint kinematics and kinetics during gait in individuals post-stroke Type de document : Article Auteurs : Toshiki Kobayashi ; Michael S. Orendurff ; Grace Hunt Article en page(s) : p. 47-55 Langues : Anglais (eng) Descripteurs : HE Vinci Accident vasculaire cérébral (AVC) Mots-clés : Stroke  Walk Test  Test de marche  Gait  Démarche  Foot Orthoses  Orthèses de pied Résumé : Background Resistance is a key mechanical property of an ankle-foot orthosis that affects gait in individuals post-stroke. Triple Action® joints allow independent adjustment of plantarflexion resistance and dorsiflexion resistance of an ankle-foot orthosis. Therefore, the aim of this study was to investigate the effects of incremental changes in dorsiflexion and plantarflexion resistance of an articulated ankle-foot orthosis with the Triple Action joints on lower limb joint kinematics and kinetics in individuals post-stroke during gait. Methods Gait analysis was performed on 10 individuals who were post-stroke under eight resistance settings (four plantarflexion and four dorsiflexion resistances) using the articulated ankle-foot orthosis. Kinematic and kinetic data of the lower limb joints were recorded while walking using a three-dimensional Vicon motion capture system and a Bertec split-belt instrumented treadmill. Findings Repeated measures analysis of variance revealed that adjustment of plantarflexion resistance had significant main effects on the ankle (P  Interpretation This study demonstrated that the adjustments of resistance in the ankle-foot orthosis with the Triple Action joints influenced ankle and knee kinematics in individuals post-stroke. Further work is necessary to investigate the long-term effects of the articulated ankle-foot orthoses on their gait. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155929 [article]

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Dimensional changes of the carpal tunnel and median nerve during manual mobilization of the carpal bones — Anatomical study / Elena Bueno-Gracia in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 56-61 Titre : Dimensional changes of the carpal tunnel and median nerve during manual mobilization of the carpal bones — Anatomical study Type de document : Article Auteurs : Elena Bueno-Gracia ; Albert Pérez-Bellmunt ; Carlos López-de-Celis Article en page(s) : p. 56-61 Langues : Anglais (eng) Descripteurs : HE Vinci Syndrome du canal carpien Mots-clés : Carpal Tunnel Syndrome  Musculoskeletal Manipulations  Manipulations de l'appareil locomoteur Résumé : Study design Cross-sectional study. Background The carpal tunnel is a clinically important fibro-osseous conduit for the median nerve and associated tendons. It is mechanically dynamic and therapeutic manual techniques that appear to move and change tunnel shape is part of clinical practice. Objectives To measure changes in dimensions of the carpal tunnel and median nerve with manual mobilization of the carpal bones in cadavers. Methods A total of 20 cryopreserved upper extremities from cadaveric specimens were used in the study. The wrist was cut using an anatomical saw at the level of the pisiform. Measurements of the cross-sectional area (CSA), anteroposterior diameter (APD), transverse diameter (TD), perimeter, flattening ratio and circularity of the carpal tunnel and of the median nerve, were taken, both in the anatomical position of the wrist and during the mobilization technique of the carpal bones. Results During the mobilization technique, the tunnel CSA (p  Conclusion Application of external manually applied compressive force across the wrist can increase the CSA of the carpal tunnel and the median nerve in cadavers. These results are consistent with other studies in which similar results were found non-invasively using ultrasound. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155930 [article]

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Microclimate / Jan Kottner in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 62-70 Titre : Microclimate : A critical review in the context of pressure ulcer prevention Type de document : Article Auteurs : Jan Kottner ; Joyce Black ; Evan Call Article en page(s) : p. 62-70 Langues : Anglais (eng) Descripteurs : HE Vinci Escarre ; Microclimat ; Peau Mots-clés : Pressure Ulcer  Epidermis  Épiderme  Microclimate  Skin Résumé : Pressure ulcers are caused by sustained mechanical loading and deformation of the skin and subcutaneous layers between internal stiff anatomical structures and external surfaces or devices. In addition, the skin microclimate (temperature, humidity and airflow next to the skin surface) is an indirect pressure ulcer risk factor. (...) Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155931 [article]

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Co-activation is not altered in the contra-lateral limb of individuals with moderate knee osteoarthritis compared to healthy controls / Michelle Jones in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 71-77 Titre : Co-activation is not altered in the contra-lateral limb of individuals with moderate knee osteoarthritis compared to healthy controls Type de document : Article Auteurs : Michelle Jones ; William Stanish ; Derek Rutherford Article en page(s) : p. 71-77 Langues : Anglais (eng) Descripteurs : HE Vinci Electromyographie ; Epreuve d'effort ; Gonarthrose Mots-clés : Osteoarthritis  Knee  Gait  Démarche  Electromyography  Exercise Test  Biomechanical Phenomena  Phénomènes biomécaniques Résumé : Background Contra-lateral knee joint function in individuals with moderate knee osteoarthritis is not well understood, despite the functional burden of bilateral osteoarthritis on end stage clinical management. The purpose of this study was to determine whether co-activation and joint biomechanics are altered in the contra-lateral limb compared to age-matched controls. Methods 20 Individuals with moderate knee osteoarthritis and 20 asymptomatic individuals walked on an instrumented dual belt treadmill at a self-selected speed. Surface electromyography of the knee joint musculature, including quadriceps, hamstrings and gastrocnemius muscles, normalized to maximum voluntary isometric contractions, as well as sagittal plane motion and sagittal and frontal plane moments were collected. Co-contraction indices were calculated and discrete variables from motion and moment data were extracted. Two-sample t-tests and 2-sample mixed model ANOVAs were performed with alpha Findings Contra-lateral knee muscle co-activation differences were not found between groups (p > 0.65). Peak knee adduction moment (0.41 Nm/kg vs. 0.32 Nm/kg) and knee adduction moment impulse (0.14 Nm s/kg vs. 0.10 Nm s/kg) were higher in the contra-lateral limb compared to the asymptomatic group respectively, whereas the sagittal motion (9.8° vs. 14.4°) and moment ranges (0.66 Nm/kg vs. 0.86 Nm/kg) during stance were less dynamic (p  Interpretation The contra-lateral limb was functioning differently biomechanically despite no changes present in muscle co-activation. Findings suggest biomechanical changes are occurring without greater demand on the neuromuscular system to preserve contra-lateral joint function in moderate knee osteoarthritis gait. A greater focus should be made to address biomechanical abnormalities in both knees of individuals with moderate unilateral symptomatic knee osteoarthritis. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155932 [article]

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Bone remodelling of the humerus after a resurfacing and a stemless shoulder arthroplasty / B. Santos in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 78-84 Titre : Bone remodelling of the humerus after a resurfacing and a stemless shoulder arthroplasty Type de document : Article Auteurs : B. Santos ; C. Quental ; J. Folgado Article en page(s) : p. 78-84 Langues : Anglais (eng) Descripteurs : HE Vinci Remodelage osseux Mots-clés : Shoulder Joint  Articulation glénohumérale  Arthroplasty  Replacement  Shoulder  Arthroplastie de l'épaule  Bone Remodeling Résumé : Background New implant designs, such as resurfacing and stemless implants, have been developed to improve the long-term outcomes of the shoulder arthroplasty. However, it is not yet fully understood if their influence on the bone load distribution can compromise the long-term stability of the implant due to bone mass changes. Using three-dimensional finite element models, the aim of the present study was to analyse the bone remodelling process of the humerus after the introduction of resurfacing and stemless implants based on the Global C.A.P. and Sidus Stem-Free designs, respectively. Methods The 3D geometric model of the humerus was generated from the CT data of the Visible Human Project and the resurfacing and stemless implants were modelled in Solidworks. Considering a native humerus model, a humerus model with the resurfacing implant, and a humerus model with the stemless implant, three finite element models were developed in Abaqus. Bone remodelling simulations were performed considering healthy and poor bone quality conditions. The loading condition considered comprised 6 load cases of standard shoulder movements, including muscle and joint reaction forces estimated by a multibody model of the upper limb. Findings The results showed similar levels of bone resorption for the resurfacing and stemless implants for common humeral regions. The regions underneath the head of the resurfacing implant, unique to this design, showed the largest bone loss. For both implants, bone resorption was more pronounced for the poor bone quality condition than for the healthy bone quality condition. Interpretation The stemless implant lost less density at the fixation site, which might suggest that these implants may be better supported in the long-term than the resurfacing implants. However, further investigation is necessary to allow definite recommendations. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155933 [article]

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Patterns of upper limb muscle activation in children with unilateral spastic cerebral palsy: Variability and detection of deviations / Aurélie Sarcher in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 85-93 Titre : Patterns of upper limb muscle activation in children with unilateral spastic cerebral palsy: Variability and detection of deviations Type de document : Article Auteurs : Aurélie Sarcher ; Sylvain Brochard ; François Hug Article en page(s) : p. 85-93 Langues : Anglais (eng) Descripteurs : HE Vinci Electromyographie ; Membre supérieur ; Paralysie cérébrale Mots-clés : Cerebral Palsy  Upper Extremity  Electromyography Résumé : Background The aim of this study was two-fold: (1) to quantify the variability of upper limb electromyographic patterns during elbow movements in typically developing children and children with unilateral spastic cerebral palsy, and to compare different amplitude normalization methods; (2) to develop a method using this variability to detect (a) deviations in the patterns of a child with unilateral spastic cerebral palsy from the average patterns of typically developing children, and (b) changes after treatment to reduce muscle activation. Methods Twelve typically developing children ([6.7–15.9yo]; mean 11.0 SD 3.0yo) and six children with unilateral spastic cerebral palsy ([7.9–17.4yo]; mean 12.4 SD 4.0yo) attended two sessions during which they performed elbow extension-flexion and pronation-supination movements. Surface electromyography of the biceps, triceps, brachioradialis, pronator teres, pronator quadratus, and brachialis muscles was recorded. The Likelihood method was used to estimate the inter-trial, inter-session, and inter-subject variability of the electromyography patterns for each time point in the movement cycle. Deviations in muscle patterns from the patterns of typically developing children and changes following treatment were evaluated in a case study of a child with cerebral palsy. Findings Normalization of electromyographic amplitude by the mean peak yielded the lowest variability. The variability data were then used in the case study. This method detected higher levels of activation in specific muscles compared with typically developing children, and a reduction in muscle activation after botulinum toxin A injections. Interpretation Upper limb surface electromyography pattern analysis can be used for clinical applications in children with cerebral palsy. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155934 [article]

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Age and falls history effects on antagonist leg muscle coactivation during walking with balance perturbations / Jessica D. Thompson in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 94-100 Titre : Age and falls history effects on antagonist leg muscle coactivation during walking with balance perturbations Type de document : Article Auteurs : Jessica D. Thompson ; Prudence Plummer ; Jason R. Franz Article en page(s) : p. 94-100 Langues : Anglais (eng) Descripteurs : HE Vinci Personne âgée fragile ; Sujet âgé Mots-clés : Frail Elderly  Aged  Walking  Marche à pied  Postural Balance  Équilibre postural Résumé : Background Inspired by a reliance on visual feedback for movement control in older age, optical flow perturbations provide a unique opportunity to study the neuromuscular mechanisms involved in walking balance control, including aging and falls history effects on the response to environmental balance challenges. Specifically, antagonist leg muscle coactivation, which increases with age during walking, is considered a neuromuscular defense against age-associated deficits in balance control. The purpose of this study was to investigate the effects of age and falls history on antagonist leg muscle coactivation during walking with and without optical flow perturbations of different amplitudes. Methods Eleven young adults [mean (standard deviation) age: 24.8 (4.8) years], eleven older non-fallers [75.3 (5.4) years] and eleven older fallers [age: 78 (7.6) years] participated in this study. Participants completed 2-minute walking trials while watching a speed-matched virtual hallway that, in some conditions, included mediolateral optical flow perturbations designed to elicit the visual perception of imbalance. Findings We first found that lower leg antagonist muscle coactivation during normal walking increased with age, independent of falls history. We also found that older but not young adults increased antagonist leg muscle coactivation in the presence of optical flow perturbations, with more pervasive effects in older adults with a history of falls. Interpretation Our findings allude to a greater susceptibility to optical flow perturbations in older fallers during walking, which points to a higher potential for risk of instability in more complex and dynamic everyday environments. These findings may also have broader impacts related to the design of innovative training paradigms and neuromuscular targets for falls prevention. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155935 [article]

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Evaluating the primary stability of standard vs lateralised cementless femoral stems – A finite element study using a diverse patient cohort / Rami M.A. Al-Dirini in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 101-109 Titre : Evaluating the primary stability of standard vs lateralised cementless femoral stems – A finite element study using a diverse patient cohort Type de document : Article Auteurs : Rami M.A. Al-Dirini ; Saulo Martelli ; Daniel Huff Article en page(s) : p. 101-109 Langues : Anglais (eng) Mots-clés : Arthroplasty  Replacement  Hip  Arthroplastie prothétique de hanche Résumé : Background Restoring the original femoral offset is desirable for total hip replacements as it preserves the original muscle lever arm and soft tissue tensions. This can be achieved through lateralised stems, however, the effect of variation in the hip centre offset on the primary stability remains unclear. Methods Finite element analysis was used to compare the primary stability of lateralised and standard designs for a cementless femoral stem (Corail®) across a representative cohort of male and female femora (N = 31 femora; age from 50 to 80 years old). Each femur model was implanted with three designs of the Corail® stem, each designed to achieve a different degree of lateralisation. An automated algorithm was used to select the size and position that achieve maximum metaphyseal fit for each of the designs. Joint contact and muscle forces simulating the peak forces during level gait and stair climbing were scaled to the body mass of each subject. Findings The study found that differences in restoring the native femoral offset introduce marginal differences in micromotion (differences in peak micromotion 3000 με) was achieved for some subjects when lateralized stems were used. Interpretation Findings of this study suggest that, with the appropriate size and alignment, the standard offset design is likely to be sufficient for primary stability, in most cases. Nonetheless, appropriate use of lateralised stems has the potential reduce the risk of peri-prosthetic bone damage. This highlights the importance of appropriate implant selection during the surgical planning stage. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155936 [article]

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Relationship between knee abduction moment with patellofemoral joint reaction force, stress and self-reported pain during stair descent in women with patellofemoral pain / Marina Cabral Waiteman in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 110-116 Titre : Relationship between knee abduction moment with patellofemoral joint reaction force, stress and self-reported pain during stair descent in women with patellofemoral pain Type de document : Article Auteurs : Marina Cabral Waiteman ; Ronaldo Valdir Briani ; Marcella Ferraz Pazzinatto Article en page(s) : p. 110-116 Langues : Anglais (eng) Descripteurs : HE Vinci Douleur ; Genou ; Pain Mots-clés : Knee  Biomechanical Phenomena  Phénomènes biomécaniques Résumé : Background Increased external knee abduction moment has been proposed as a risk factor for patellofemoral pain. This alteration is thought to be associated with elevated patellofemoral joint reaction force and stress, however these relationships remain poorly explored. Therefore, this study aimed at comparing knee abduction moment parameters (peak, rate of moment development and impulse), patellofemoral joint reaction force and stress of women with patellofemoral pain and pain-free controls during stair descent; and investigating the relationship among these variables with self-reported pain. Methods Kinetic data was obtained by inverse-dynamics equations and a previously reported algorithmic model was used to determine patellofemoral joint reaction force and stress. Participants' worst pain in the last month and pain level during stair descent were evaluated using a visual analogue scale. Findings Women with patellofemoral pain presented higher peak, rate of moment development and impulse of the external knee abduction moment, patellofemoral joint reaction force and stress (p = 0.005 to 0.04, effect size = 0.52 to 0.96) during stair descent than pain-free controls. Only knee abduction moment impulse presented positive moderate correlations with worst pain level in the last month (r = 0.53, p  Interpretation These findings indicate that strategies aimed at decreasing external knee abduction moment impulse could reduce the load over the patellofemoral joint and improve pain of women with patellofemoral pain. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155937 [article]

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Effect of foot orthosis design on lower limb joint kinematics and kinetics during walking in flexible pes planovalgus / Gauthier Desmyttere in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 117-129 Titre : Effect of foot orthosis design on lower limb joint kinematics and kinetics during walking in flexible pes planovalgus : A systematic review and meta-analysis Type de document : Article Auteurs : Gauthier Desmyttere ; Maryam Hajizadeh ; Jacinte Bleau Article en page(s) : p. 117-129 Langues : Anglais (eng) Mots-clés : Flatfoot  Pied plat  Foot Orthoses  Orthèses de pied  Biomechanical Phenomena  Phénomènes biomécaniques Résumé : Foot orthoses are commonly used for the management of excessive foot pronation in people with pes planovalgus. However, results are inconsistent due to variability in orthosis geometrical designs. (...) Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155938 [article]

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Changes in the ankle muscles co-activation pattern after 5 years following total ankle joint replacement / Carlos De La Fuente in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 130-135 Titre : Changes in the ankle muscles co-activation pattern after 5 years following total ankle joint replacement Type de document : Article Auteurs : Carlos De La Fuente ; Eduardo Martinez-Valdes ; Carlos Cruz-Montecinos Article en page(s) : p. 130-135 Langues : Anglais (eng) Mots-clés : Arthroplasty  Replacement  Ankle  Arthroplastie de remplacement de la cheville  Walking  Marche à pied Résumé : Background The Hintegra® arthroplasty provides inversion-eversion stability, permits axial rotation, ankle flexion-extension, and improvements of the gait patterns are expected up to 12 months of rehabilitation. However, sensorimotor impairments are observed in ankle flexors/extensors muscles after rehabilitation, with potential negative effects on locomotion. Here we determined the timing and amplitude of co-activation of the tibialis anterior and medial gastrocnemius muscles during gait by assessing non-operated and operated legs of patients with total ankle replacement, 5 years after surgery. Methods Twenty-nine patients (age: 58 [5.5] years, height: 156.4 [6.5] cm, body mass: 72.9 [6.5] kg, 10 men, and 19 women) that underwent Hintegra® ankle arthroplasty were included. Inclusion criteria included 5 years prosthesis survivorship. The onset and offset of muscle activation (timing), as well as the amplitude of activation, were determined during barefoot walking at self-selected speed by surface electromyography. The timing, percentage, and index of co-activation between the tibialis anterior and medial gastrocnemius were quantified and compared between non-operated and operated legs. Findings The operated leg showed higher co-activation index and temporal overlapping between tibialis anterior and medial gastrocnemius during gait (p  Interpretation The neuromuscular changes developed during the process of degeneration do not appear to be restored 5 years following arthroplasty. The insertion of an ankle implant may restore anatomy and alignment but neuromuscular adaptations to degeneration are not corrected by 5 years following joint replacement. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155939 [article]

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High correlation between mechanical properties and bone mineral parameters in embalmed femurs after long-term storage / Bryan Wright in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 136-142 Titre : High correlation between mechanical properties and bone mineral parameters in embalmed femurs after long-term storage Type de document : Article Auteurs : Bryan Wright ; Lydia Ragan ; Sanyalak Niratisairak Article en page(s) : p. 136-142 Langues : Anglais (eng) Descripteurs : HE Vinci Densite osseuse ; Fémur Mots-clés : Bone Density  Formaldehyde  Formaldéhyde Résumé : Background Fresh frozen human femurs are considered “the gold standard” in biomechanical studies of hip fractures, resembling the in vivo situation mostly. A more readily available alternative is formalin embalmed femurs. However, to which extent formalin affects key features of bone; its mechanical properties, bone mineral content and their mutual relationship over time, remains unknown. Accordingly, we measured the mineral parameters and related them to the mechanical properties of formalin fixed femurs after long-term storage. Methods 36 paired femurs from human donors, fixed in formalin and stored for a mean period of 4.6 (3.5–6) years. Quantitative CT was performed to measure the bone mineral density and mass at the mainly cortical mid shaft and the center of the mainly cancellous condyles. Each pair was subjected to local tests by three-point bending and screw pullout of the shaft and lateral punch and metaphyseal cube compression of the condyles. Findings Neither mechanical nor bone mineral data were significantly correlated to storage time. Well-known associations for bone parameters with age and gender were retrieved. Maximum force of the cortical bone tests was highly correlated to the diaphyseal bone mass; (r = 0.80–0.87, p = 0.01), while maximum force of the cancellous bone tests correlated well to the density of the condylar bone; (r = 0.70, p = 0.01). Interpretation Our results indicate that mechanical and bone mineral data and their mutual relationship are conserved in formalin fixed femurs even after long-term storage. Formalin fixed femurs may serve as an alternative to fresh frozen femurs in biomechanical testing. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155940 [article]

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Kinematic differences between children with obstetric brachial plexus palsy and healthy controls while performing activities of daily living / Judy Mahon in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 143-151 Titre : Kinematic differences between children with obstetric brachial plexus palsy and healthy controls while performing activities of daily living Type de document : Article Auteurs : Judy Mahon ; Ailish Malone ; Damien Kiernan Article en page(s) : p. 143-151 Langues : Anglais (eng) Descripteurs : HE Vinci Activités de la vie quotidienne ; Enfant (6-12 ans) ; Plexus brachial Mots-clés : Child  Brachial Plexus  Activities of Daily Living Résumé : Background Residual shoulder dysfunction and deformity impacts on functional performance in children with obstetric brachial plexus palsy. Clinical understanding of upper limb dynamic movement patterns is difficult with observation alone. This case-control study describes the significant kinematic differences between children with obstetric brachial plexus palsy compared to typically developing children while performing tasks of the modified Mallet Scale. Methods Eleven children with obstetric brachial plexus palsy (mean 10 years, range 7–15 years, Narakas group I-III) and 10 typically developing children (mean 9 years 9 months, range 6–15 years) completed three-dimensional upper limb motion analysis using the acromion method to track dynamic scapular movement. Kinematic data were captured by a 4-CODA cx1 optoelectronic tracking system. Participants performed three trials of the modified Mallet scale tasks. Local coordinate systems, segment and joint rotations were defined as recommended by the International Society of Biomechanics. Findings Joint rotation angles against time of the glenohumeral, thoracohumeral and scapulohumeral joints were calculated. Kinematic findings demonstrated increased internal rotation in all postures, reduced glenohumeral excursion, habitual “trumpet” posture of glenohumeral abduction/elevation and variability in movement strategies. Scapulohumeral rhythm during abduction task was 1.88:1 in typically developing children and 1.04:1 in children with obstetric brachial plexus palsy. Interpretation Children with obstetric brachial plexus palsy demonstrate deficient external rotation in all tasks. Despite increased postural internal rotation, ability to move through internal rotation range is compromised. The glenohumeral joint showed the greatest range deficit, contributing to abnormal scapulohumeral rhythm. Future sub-group analysis of Narakas Classification is recommended. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155941 [article]

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Elastoplastic behavior of highly cross-linked and vitamin E-stabilized polyethylene – A biomechanical study / Yung-Chang Lu in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 152-158 Titre : Elastoplastic behavior of highly cross-linked and vitamin E-stabilized polyethylene – A biomechanical study Type de document : Article Auteurs : Yung-Chang Lu ; Cheng-Yu Wu ; Ting-Kuo Chang Article en page(s) : p. 152-158 Langues : Anglais (eng) Descripteurs : HE Vinci Vitamine E Mots-clés : Polyethylene  Polyéthylène  Vitamin E  Biomechanical Phenomena  Phénomènes biomécaniques Résumé : Background Vitamin E-stabilized cross-linked polyethylene has been touted to alleviate the negative effects of oxidation. Although it has demonstrated significant improvements in wear resistance, bio-tribology, and oxidative resistance, little is known about the effect of antioxidants and dosage of cross-linking on the mechanical strength. This study aimed to evaluate the mechanical properties of these novel materials, which are commonly used in orthopedic implants. Methods Samples of different polymers were prepared with various levels of cross-linking and with or without vitamin E-stabilization and then tested according to ASTM D695 and D638. The elastoplastic characteristics under compression and tension were compared between the groups. Findings Vitamin E-stabilized cross-linked polyethylene showed a significant increase in elastic modulus over other groups, with a maximum increase of 26% in compression and 40% in tension when compared to the highly cross-linked group without vitamin E stabilization. The elastoplastic behavior under compression differed to that in tension for all polymers, demonstrating the anisotropic characteristics of these polymers. Interpretation The lower mechanical strength of highly cross-linked polyethylene has been a complication with the use of this polymer in orthopedic liners. This current study suggests that vitamin E-stabilized cross-linked polyethylene could be a suitable alternative material for knee implants because of its improved strength in resisting external forces. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155942 [article]

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The use of biofeedback for gait retraining / Linda M.A. van Gelder in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 159-166 Titre : The use of biofeedback for gait retraining : A mapping review Type de document : Article Auteurs : Linda M.A. van Gelder ; Andrew Barnes ; Jonathan S. Wheat Article en page(s) : p. 159-166 Langues : Anglais (eng) Mots-clés : Biofeedback  Psychology  Rétroaction biologique (psychologie)  Gait  Démarche Résumé : Biofeedback seems to be a promising tool to improve gait outcomes for both healthy individuals and patient groups. However, due to differences in study designs and outcome measurements, it remains uncertain how different forms of feedback affect gait outcomes. (...) Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155943 [article]

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Sex specific associations between biomechanical recovery and clinical recovery after total hip arthroplasty / Heather J. Brunner in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 167-173 Titre : Sex specific associations between biomechanical recovery and clinical recovery after total hip arthroplasty Type de document : Article Auteurs : Heather J. Brunner ; Kharma C. Foucher Article en page(s) : p. 167-173 Langues : Anglais (eng) Mots-clés : Gait  Démarche  Biomechanical Phenomena  Phénomènes biomécaniques  Recovery of Function  Récupération fonctionnelle  Arthroplasty  Replacement  Hip  Arthroplastie prothétique de hanche Résumé : Background There are sex-specific gait differences in men and women before and after total hip arthroplasty (THA) but we do not know their impact on clinical outcomes. The objective of this study was to identify sex-specific associations between pre- and postoperative changes in pain and function and (i) gait mechanics, (ii) passive range of motion, and (iii) abductor strength. Methods Pre- and one-year postoperative data were identified from a data repository (n = 124; 64 Women; Age 61 (SD 10); BMI 29 (SD 5)). We used linear regression analysis to identify sex-specific associations between Harris Hip Score pain and function subscores, and sagittal plane hip kinematics and 3D hip kinetics during gait, hip abductor strength, and passive hip range of motion (RoM). Findings Combinations of biomechanical variables predicted up to 24% of the variation in pain improvement and up to 27% of the variation in functional improvement. In men, increased peak external rotation moments were associated with pain improvement. Passive flexion RoM and peak extension moments were associated with functional improvement. In women, increased passive adduction RoM and peak external rotation moments were associated with pain improvement. Peak adduction moments and passive flexion RoM were associated with functional improvement. Interpretations The different associations between improvement in clinical outcomes and improvement in gait, passive RoM, and abductor strength suggest that the biomechanical path to recovery may be different in men and women. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155944 [article]

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Non-setting, injectable biomaterials containing particulate hydroxyapatite can increase primary stability of bone screws in cancellous bone / Jorge Solana Muñoz in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 174-180 Titre : Non-setting, injectable biomaterials containing particulate hydroxyapatite can increase primary stability of bone screws in cancellous bone Type de document : Article Auteurs : Jorge Solana Muñoz ; Ulrike Kettenberger ; Philip Procter Article en page(s) : p. 174-180 Langues : Anglais (eng) Descripteurs : HE Vinci Densite osseuse ; Ostéoporose Mots-clés : Bone Density  Bone Screws  Vis orthopédiques  Hydrogel  Osteoporosis Résumé : Background Fracture fixation in weak bone is still a clinical challenge. Screw augmentation was shown to successfully increase their primary stability. The currently used calcium phosphate or polymeric bone cements, however, present important drawbacks such as induced toxicity and/or impaired bone neo-formation. A new approach to enhance bone screw primary stability without affecting bone formation is the use of non-setting, calcium phosphate loaded soft materials as the augmentation material. Methods Two types of biomaterials (non-crosslinked hyaluronic acid as viscous fluid and agar as hydrogel) were loaded with 40 wt/vol% of hydroxyapatite particles and characterized. The screw augmentation effect of all materials was evaluated through pull-out tests in bovine cancellous bone and compared to the non-augmented situation (control). The bone mineral density of each test sample was measured with μCT scans and was used to normalize the pull-out strength. Findings Both materials loaded with hydroxyapatite increased the normalized pull-out strength of the screws compared to control samples and particle-free materials. This counter-intuitive augmentation effect increased with decreasing bone mineral density and was independent from the type of the soft materials used. Interpretation We were able to demonstrate that non-setting, injectable biomaterials loaded with ceramic particles can significantly enhance the primary stability of bone screws. This material combination opens the unique possibility to achieve a screw augmentation effect without impairing or even potentially favoring the bone formation in proximity to the screw. This effect would be particularly advantageous for the treatment of osteoporotic bone fractures requiring a stabilization with bone screws. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155945 [article]

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Walking and balance in children and adolescents with lower-limb amputation / Arezoo Eshraghi in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 181-198 Titre : Walking and balance in children and adolescents with lower-limb amputation : A review of literature Type de document : Article Auteurs : Arezoo Eshraghi ; Zahra Safaeepour ; Mark Daniel Geil Article en page(s) : p. 181-198 Langues : Anglais (eng) Descripteurs : HE Vinci Adolescent ; Amputation ; Membre inférieur ; Mobilité réduite ; Prothèses et implants ; Rééducation et réadaptation Mots-clés : Walking  Marche à pied  Amputation chirurgicale  Lower Extremity  Prostheses and Implants  Gait  Démarche  Postural Balance  Équilibre postural  Mobility Limitation Résumé : Children with lower limb loss face gait and balance limitations. Prosthetic rehabilitation is thus aimed at improving functional capacity and mobility throughout the developmental phases of the child amputees. (...) Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155946 [article]

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Quadriceps-strengthening exercise and quadriceps and knee biomechanics during walking in knee osteoarthritis: A two-centre randomized controlled trial / Paul DeVita in Clinical Biomechanics, Vol. 59 (2018)

[article]  inClinical Biomechanics > Vol. 59 (2018) . - p. 199-206 Titre : Quadriceps-strengthening exercise and quadriceps and knee biomechanics during walking in knee osteoarthritis: A two-centre randomized controlled trial Type de document : Article Auteurs : Paul DeVita ; Jens Aaboe ; Cecilie Bartholdy Article en page(s) : p. 199-206 Langues : Anglais (eng) Descripteurs : HE Vinci Douleur ; Force musculaire ; Genou ; Pain Mots-clés : Quadriceps Muscle  Muscle quadriceps fémoral  WOMAC  Muscle Strength  Knee  Compressive Strength  Résistance à la compression Résumé : Objective To assess the effect of quadriceps strengthening on quadriceps muscle force, power, and work and tibio-femoral compressive loads during walking in adults with knee osteoarthritis. Methods Study design: Two-center, randomized, controlled trial. Intervention: Patients with knee osteoarthritis were randomly allocated to quadriceps strengthening program (3 times weekly) or no attention control group. Main outcome measures: Primary outcome was change from baseline in peak quadriceps force during walking at 12 weeks. Secondary outcomes included quadriceps power and work, knee compression forces during walking estimated with musculoskeletal modeling, muscle strength and pain and function. Outcomes were measured at baseline and 12 weeks. Results 30 patients were randomized to receive either training (n = 15) or no attention (n = 15). At follow-up, there were no statistical differences between groups for maximum quadriceps force, quadriceps positive power, negative work, and positive work, and knee compressive force. Maximum negative quadriceps power in early stance was statistically significantly increased 36% in the training group compared to the control group which was most likely partially a response to faster walking velocity at follow-up. Muscle strength and patient reported pain and function were improved in the training group compared to the control group. Conclusions Quadriceps strength training leads to increased muscle strength and improved symptomatic and functional outcomes but does not change quadriceps or knee joint biomechanics during walking. The biomechanical mechanism of improved health with strength training in knee osteoarthritis patients remains unknown. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=155947 [article]

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