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François Prince – One of the best experts on this subject based on the ideXlab platform.

  • Postural Balance during Quiet Standing in Patients with Total Hip Arthroplasty with Large Diameter Femoral Head and Surface Replacement Arthroplasty
    Archives of Physical Medicine and Rehabilitation, 2009
    Co-Authors: Julie Nantel, Nicolas Termoz, Muthu Ganapathi, Pascal-andré Vendittoli, Martin Lavigne, François Prince

    Abstract:

    OBJECTIVE: To compare postural balance between patients who have had either a large diameter head total hip arthroplasty or surface replacement arthroplasty. DESIGN: Observational study. SETTING: Outpatient biomechanical laboratory. PARTICIPANTS: Two groups of 14 patients with surface replacement or large diameter head total hip arthroplasties recruited from a larger randomized study and 14 control subjects. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Postural balance during quiet standing in dual and one-leg stance (operated leg), hip Abductor Muscle strength, clinical outcomes, and radiographic analyses were compared between groups. RESULTS: Compared to the control group, patients in both groups showed smaller center of pressure displacement amplitude in the medial-lateral direction in dual stance. Patients with large diameter head total hip arthroplasty showed lower hip Abductor Muscle strength compared to control subjects. There was statistical difference between the 2 patient groups in biomechanical reconstruction of the hip. Despite these differences, there was no significant difference in the ability to complete the one-leg stance task between the 3 groups. CONCLUSIONS: The muscular strength in the operated limb could be mainly responsible for the lower center of pressure displacement amplitude compared to control subjects. However, the ability to complete the one-leg stance demonstrates that patients do not fear to load the hip prosthesis when needed. The large diameter femoral head may be a major mechanical factor contributing to these results.

  • Gait Patterns after Total Hip Arthroplasty and Surface Replacement Arthroplasty
    Archives of Physical Medicine and Rehabilitation, 2009
    Co-Authors: Julie Nantel, Nicolas Termoz, Pascal-andré Vendittoli, Martin Lavigne, François Prince

    Abstract:

    Objective : To compare gait patterns in patients with total hip arthroplasty (THA) and surface hip arthroplasty. Main Outcomes Measures : Gait patterns, hip Abductor Muscle strength, clinical outcomes, and radiographic analyses were compared between groups. Results In the sagittal plane, the THA group showed a larger flexor moment and larger mechanical work in H2S and K3S power bursts compared with surface hip arthroplasty and control subjects. In the frontal plane, both THA and surface hip arthroplasty patients had smaller hip Abductor Muscles energy generation (H3F) than the control group. No difference was found for the hip Abductor Muscles strength. Conclusions : In the THA group, the larger energy absorption in H2S and K3S would be a cost-effective mechanical adaptation to increase stability. The surface hip arthroplasty characteristics could allow the return to a more normative gait pattern compared with THA. The modification in the frontal plane in surface hip arthroplasty and THA would be related to the hip Abductor Muscles strength.

Julie Nantel – One of the best experts on this subject based on the ideXlab platform.

  • Postural Balance during Quiet Standing in Patients with Total Hip Arthroplasty with Large Diameter Femoral Head and Surface Replacement Arthroplasty
    Archives of Physical Medicine and Rehabilitation, 2009
    Co-Authors: Julie Nantel, Nicolas Termoz, Muthu Ganapathi, Pascal-andré Vendittoli, Martin Lavigne, François Prince

    Abstract:

    OBJECTIVE: To compare postural balance between patients who have had either a large diameter head total hip arthroplasty or surface replacement arthroplasty. DESIGN: Observational study. SETTING: Outpatient biomechanical laboratory. PARTICIPANTS: Two groups of 14 patients with surface replacement or large diameter head total hip arthroplasties recruited from a larger randomized study and 14 control subjects. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Postural balance during quiet standing in dual and one-leg stance (operated leg), hip Abductor Muscle strength, clinical outcomes, and radiographic analyses were compared between groups. RESULTS: Compared to the control group, patients in both groups showed smaller center of pressure displacement amplitude in the medial-lateral direction in dual stance. Patients with large diameter head total hip arthroplasty showed lower hip Abductor Muscle strength compared to control subjects. There was statistical difference between the 2 patient groups in biomechanical reconstruction of the hip. Despite these differences, there was no significant difference in the ability to complete the one-leg stance task between the 3 groups. CONCLUSIONS: The muscular strength in the operated limb could be mainly responsible for the lower center of pressure displacement amplitude compared to control subjects. However, the ability to complete the one-leg stance demonstrates that patients do not fear to load the hip prosthesis when needed. The large diameter femoral head may be a major mechanical factor contributing to these results.

  • Gait Patterns after Total Hip Arthroplasty and Surface Replacement Arthroplasty
    Archives of Physical Medicine and Rehabilitation, 2009
    Co-Authors: Julie Nantel, Nicolas Termoz, Pascal-andré Vendittoli, Martin Lavigne, François Prince

    Abstract:

    Objective : To compare gait patterns in patients with total hip arthroplasty (THA) and surface hip arthroplasty. Main Outcomes Measures : Gait patterns, hip Abductor Muscle strength, clinical outcomes, and radiographic analyses were compared between groups. Results In the sagittal plane, the THA group showed a larger flexor moment and larger mechanical work in H2S and K3S power bursts compared with surface hip arthroplasty and control subjects. In the frontal plane, both THA and surface hip arthroplasty patients had smaller hip Abductor Muscles energy generation (H3F) than the control group. No difference was found for the hip Abductor Muscles strength. Conclusions : In the THA group, the larger energy absorption in H2S and K3S would be a cost-effective mechanical adaptation to increase stability. The surface hip arthroplasty characteristics could allow the return to a more normative gait pattern compared with THA. The modification in the frontal plane in surface hip arthroplasty and THA would be related to the hip Abductor Muscles strength.

Petros Ismailidis – One of the best experts on this subject based on the ideXlab platform.

  • Hip Abductor Muscle strength in patients after total or unicompartmental knee arthroplasty for knee osteoarthritis or avascular necrosis: a systematic review and meta-analysis protocol.
    BMJ open, 2020
    Co-Authors: Peter Kvarda, Annegret Mündermann, Christian Appenzeller-herzog, Corina Nüesch, Christian Egloff, Petros Ismailidis

    Abstract:

    Introduction Reduced hip Abductor strength may indirectly lead to changes in knee kinematics and functional impairment and has been reported in patients with patellofemoral pain and knee osteoarthritis (OA). Limited information is available regarding hip Abductor strength following total or unicompartmental knee arthroplasty (TKA/UKA). The aims of this systematic review are to synthesise the evidence of hip Abductor Muscle strength deficits in patients following TKA/UKA and to determine influencing factors for these deficits. Methods and analysis Embase, Medline, SportDiscus, the Web of Science Core Collection and Scopus will be searched for human-based clinical studies investigating hip Abductor Muscle strength after TKA/UKA for knee OA or avascular necrosis (AVN). Articles studying hip Abductor strength after knee arthroplasty for post-traumatic OA will not be considered. No restriction on study design, prosthesis design, surgical approach, patient characteristics or severity of OA/AVN will be applied. We will search articles published between 1 January 1990 and the date of our last search. Only articles in English or German language will be considered for inclusion. Studies reporting manually measured Muscle strength or measurements performed at hip abduction angles other than 0° will be excluded. References will be screened by two reviewers independently. Where necessary, a third author will make the final decision. The assessment of quality and risk of bias will be performed with the modified Newcastle-Ottawa scale. Data will be extracted and presented in a tabular form. Depending on availability, comparable subgroup and meta-analyses will be conducted. Patient characteristics such as age, sex and surgical approach or rehabilitation programme will be analysed, if sufficient data are available. Ethics and dissemination No ethics approval is required. The results will be published in a peer-reviewed journal and as conference presentation.

  • Abductor Muscle strength deficit in patients after total hip arthroplasty for hip osteoarthritis: a protocol for a systematic review and meta-analysis
    BMJ open, 2020
    Co-Authors: Petros Ismailidis, Peter Kvarda, Werner Vach, Christian Appenzeller-herzog, Annegret Mündermann

    Abstract:

    Introduction Conservation of Abductor Muscle strength is directly associated with physical function after total hip replacement (THA). Although many studies have tried to explore and quantify a potential Abductor Muscle strength deficit after THA as well as identify possible causes and treatment options, this topic has not been addressed systematically. Methods and analysis Human-based studies reporting measurements of hip Abductor strength will be included in this review. Studies reporting on hip Abductor strength measured manually or isometric measurements at an abduction angle other than 0° will not be considered. No restriction will be placed on study design, publication date operative approach, prosthesis design, age and sex of the patients or severity of OA. Data sources will be Embase via embase.com, Medline ALL via Ovid and the Cochrane Central Register of Controlled Trials. The preliminary search was conducted on 5 May 2019. Data regarding absolute values or torque ratio of hip Abductor torque between sides as well as patient demographic data, surgical approaches and rehabilitation protocols will be extracted. The assessment of quality and risk of bias will be performed with the modified Newcastle-Ottawa Scale. The screening, data extraction and quality assessment will be performed by two reviewers independently. Where necessary, a third review author will make a final judgement. Narrative synthesis as well as tabular presentation of the extracted data will be included. Whenever possible, metaregression and subgroup specific meta-analyses will be used to investigate the influence of time since THA and type of measurement (isokinetic or isometric) on the different outcomes. In case of sufficient information, these analyses will be extended to include characteristics such as age, sex, surgical approach or rehabilitation programme. Ethics and dissemination No ethics approval is required. The results will be disseminated through peer-reviewed publications and conference presentations. PROSPERO registration number CRD42020153185.