STATIC FORCE AND STABILITY ANALYSIS OF THE ELBOW

肘部静力及稳定性分析

• 批准号: 2078567
• 负责人: KAI-NAN AN
• 金额: $ 13.95万
• 依托单位: MAYO CLINIC ROCHESTER
• 依托单位国家: 美国
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-12-15 至 1997-11-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/2078567
• 关键词: arthroplasty; biomechanics; elbow; human tissue; joint prosthesis; muscle function

DESCRIPTION (Adapted from the applicant's Abstract): The elbow is one of the few remaining joints for which the orthopedic surgeon does not possess the expertise or the information necessary to adequately select the patients amenable to joint replacement, or more importantly, the optimum implant for a given circumstance. The overall goal of the proposed study is to address the remaining problems associated with elbow reconstruction and replacement. The investigation will include implants that appear to have some promising applications: capitellocondylar resurfacing device (Ewald), ERS Surface Replacement System (Pritchard), Norway Elbow (Risung), and Souter Strathclyde Arthroplasty (U.K.). The continuing problem with the resurfacing device is instability, and thus both static and dynamic elements of their function will be assessed. Kinematic and tendon excursion data from cadaveric elbow specimens with prosthetic replacements will be collected under various muscle loading and valgus varus and axial rotational stresses. Joint constraints and laxity with different levels of soft tissue reconstruction and variations in implant placement will also be evaluated. Moment arm changes throughout the arc of motion will be obtained for three major flexors and extensors about the prosthetic elbow joint. Three hypotheses will be tested. The first is that the stability of the resurfacing arthroplasty is highly dependent on the capsuloligamentous condition. The second is that implant component malalignment will increase laxity of the joint. The third is that the moment arm balance of flexor and extensor muscles after implant replacement will be the same as those of the anatomic joint. It is anticipated that information obtained from this study will directly affect surgical guidelines for patient selection with reference to quality of bone and the presence or absence of static stabilizing elements. Furthermore, it will provide the surgeon with a basis for making a selection from the currently available implant designs. Finally, and of particular importance, the proposed studies should provide a standard for judging the degree of success of surgical techniques reported by various surgeons and centers throughout the world.

描述（改编自申请人的摘要）：肘部是一个 整形外科医生没有处理的剩下的几个关节 拥有充分选择所需的专业知识或信息 适合接受关节置换术的患者，或更重要的是， 针对给定情况的最佳植入物。该项目的总体目标是 拟议的研究旨在解决与 肘部重建和置换。调查将包括 植入物似乎具有一些有前景的应用： 头髁表面置换装置 (Ewald)、ERS 表面置换 System (Pritchard)、Norway Elbow (Risung) 和 Souter Strathclyde 关节置换术（英国）。重铺设备的持续问题 是不稳定的，因此它们的静态和动态元素 将评估功能。运动学和肌腱偏移数据来自 将收集带有假肢替换物的尸体肘部标本 在各种肌肉负荷和外翻内翻和轴向旋转下 压力。不同程度软度的关节约束和松弛 组织重建和种植体植入的变化也将是 评价。力臂在整个运动弧上的变化将是 获得关于假肢的三个主要屈肌和伸肌 肘关节。将测试三个假设。首先是 关节置换术的稳定性很大程度上取决于 囊韧带状况。第二个是植入组件 错位会增加关节的松弛。第三个是 植入后屈肌和伸肌的力臂平衡 更换将与解剖关节的更换相同。这是 预计从这项研究中获得的信息将直接 影响患者选择的手术指南参考 骨质量以及是否存在静电稳定 元素。此外，它还将为外科医生提供以下基础： 从当前可用的种植体设计中进行选择。 最后，特别重要的是，拟议的研究应该 提供判断手术成功程度的标准 各地不同外科医生和中心报告的技术 世界。