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首页> 外文期刊>Journal of orthopaedic research >Lengthening the moment arm of the patella confers enhanced extensor mechanism power following total knee arthroplasty
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Lengthening the moment arm of the patella confers enhanced extensor mechanism power following total knee arthroplasty

机译：延长髌骨的时刻臂赋予总膝关节置换术后增强的伸肌机制功率

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摘要

We investigated whether a postulated biomechanical advantage conferred to the extensor mechanism by a change in knee implant design was detectable in patients by direct physical testing. 212 TKA patients were enrolled in a double blind randomized controlled trial to receive either a traditional implant or one which incorporated new design features. Extensor mechanism power output and physical performance on a battery of timed functional activities was assessed pre-operatively and then at 6, 26, and 52 weeks post-operatively. Significantly enhanced power output was observed in both groups post-arthroplasty; however, the new design implant group demonstrated a greater change in power output than the traditional implant group. Posthoc testing of between group differences highlighted greater improvement at all post-operative assessments. At 52 weeks, patients receiving the implant with the postulated biomechanical advantage achieved 116% of the power output of their contralateral limb, whereas patients with the traditional design achieved 90%. No between group difference was detected in the patient's time to complete functional tasks. Thus, patients receiving a knee implant of a modern design (theoretically able to confer a mechanical advantage to the extensor mechanism) were found to generate significantly greater extensor power than those receiving a traditional implant without the postulated mechanical advantage.
机译：我们调查了通过直接物理测试可检测到通过膝关节植入设计的变化赋予伸肌机制的假设生物力学优势。 212例TKA患者注册了双盲随机对照试验，以接收传统的植入物或其中包含新的设计特征的植入物。在可操作地进行预操作性，然后在可操作地进行6,26和52周进行定时功能活动的电池电量的伸肌机构功率输出和物理性能。在关节置换术后，在两个组中观察到显着增强的功率输出;然而，新的设计植入物组展示了比传统植入物组更大的功率输出变化。群体差异之间的POSTHOC测试突出了所有术后评估的更大改善。在52周的时间里，接受植入物的患者与假设的生物力学优势实现了116％的对侧肢体的动力输出，而传统设计的患者达到90％。在患者的时间内检测到群体差异之间的否则在完成功能任务。因此，发现接受现代设计的膝关节植入物（理论上能够赋予延伸机构的机械优势）的患者，而没有在没有假设的机械优势的情况下接收传统植入物的伸展功率显着更大。

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  • 来源
    《Journal of orthopaedic research》 |2013年第8期|共7页
  • 作者

    HamiltonD.F.; SimpsonA.H.R.W.; BurnettR.; PattonJ.T.; MoranM.; ClementN.D.; HowieC.R.; GastonP.;

  • 作者单位

    Department of Orthopaedics and Trauma Royal Infirmary of Edinburgh University of Edinburgh 49;

    Department of Orthopaedics and Trauma Royal Infirmary of Edinburgh University of Edinburgh 49;

    Department of Orthopaedics and Trauma Royal Infirmary of Edinburgh University of Edinburgh 49;

    Department of Orthopaedics and Trauma Royal Infirmary of Edinburgh University of Edinburgh 49;

    Department of Orthopaedics and Trauma Royal Infirmary of Edinburgh University of Edinburgh 49;

    Department of Orthopaedics and Trauma Royal Infirmary of Edinburgh University of Edinburgh 49;

    Department of Orthopaedics and Trauma Royal Infirmary of Edinburgh University of Edinburgh 49;

    Department of Orthopaedics and Trauma Royal Infirmary of Edinburgh University of Edinburgh 49;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 骨科学（运动系疾病、矫形外科学）;
  • 关键词

    extensor mechanism; implant design; muscle power; TKA;

    机译：伸肌机制;植入设计;肌肉力量;TKA;

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