在日常活动中，髋部接触力可以定向在一个定向良好的杯子外；种植体检测的意义

IF 1.4 3区医学 Q4 ENGINEERING, BIOMEDICAL

Clinical Biomechanics Pub Date : 2025-06-04 DOI:10.1016/j.clinbiomech.2025.106576

Lee Etchels , Casey Myers , Chadd Clary , Paul Rullkoetter , Ruth Wilcox , Alison Jones

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引用次数: 0

摘要

髋关节置换术在一系列标准测试下进行评估，包括模拟髋臼杯的边缘载荷。该研究的目的是通过患者特定的日常活动肌肉骨骼模拟来提供数据，以改进临床前测试方法，量化髋关节负荷相对于杯口方向的方向。方法对5例全髋关节患者的步行、坐立、退步的肌肉骨骼模型数据进行分析。模拟种植体对准，包括平移和旋转变化（杯形种植方向：倾角30-50°，版本12-32°）。根据骨盆旋转确定动态杯的方向。载荷矢量和杯杆之间的角度，力，而过去的边缘，和位置在杯边缘的矢量离开和返回到杯子计算。发现：在坐立或退下时，杯子没有受到外力。在摇摆阶段，所有外力都指向前方，方向变化最大的载荷通常从前方下方开始，向上扫过。负载矢量与杯杆之间的最大角度（127°）和最大外力（245 N）在本数据集和当前ISO标准的最坏情况下相似。然而，与ISO加载时的0°相比，最大的边缘扫描为18°，并且ISO加载指向优越的边缘。解释：目前的ISO标准可能低估了衬垫固定特征损坏的可能性，或者由于载荷矢量在边缘周围传递而产生的吱吱声。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Hip contact forces can be directed outside of a well-oriented cup during common activities; implications for implant testing

Background

Hip replacements are evaluated under a range of standard tests, including simulations of edge loading of the acetabular cup. The study aim was to provide data for the improvement of preclinical testing methods through patient-specific musculoskeletal simulation of daily activities that quantify the direction of hip joint loading relative to the orientation of the cup.

Methods

Musculoskeletal modelling data for five total hip patients were analysed for walking, sit-to-stand, and step down. Simulated implant alignment translational and rotational variations were included (cup implantation orientations: inclination 30–50°, version 12–32°). Dynamic cup orientations were determined based on pelvic rotation. The angles between the load vector and cup pole, force while past the rim, and locations on the cup rim where the vector left and returned into the cup were calculated.

Findings

No forces external to the cup occurred under sit-to-stand or step down. All external forces were directed anteriorly during swing phase, loading with the largest direction changes typically started anteroinferiorly and swept superiorly. The maximum angle between the load vector and cup pole (127°) and maximum external force (245 N) were similar between the worst cases from this dataset and current ISO standard. The largest sweep around the rim was 18°, compared to 0° in the ISO loading, however, and the ISO loading is directed to the superior rim edge.

Interpretation

The current ISO profile may underestimate the potential for liner fixation feature damage or squeaking from the load vector passing around the rim.

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来源期刊

Clinical Biomechanics 医学-工程：生物医学

CiteScore

3.30

自引率

5.60%

发文量

189

审稿时长

12.3 weeks

期刊介绍： Clinical Biomechanics is an international multidisciplinary journal of biomechanics with a focus on medical and clinical applications of new knowledge in the field. The science of biomechanics helps explain the causes of cell, tissue, organ and body system disorders, and supports clinicians in the diagnosis, prognosis and evaluation of treatment methods and technologies. Clinical Biomechanics aims to strengthen the links between laboratory and clinic by publishing cutting-edge biomechanics research which helps to explain the causes of injury and disease, and which provides evidence contributing to improved clinical management. A rigorous peer review system is employed and every attempt is made to process and publish top-quality papers promptly. Clinical Biomechanics explores all facets of body system, organ, tissue and cell biomechanics, with an emphasis on medical and clinical applications of the basic science aspects. The role of basic science is therefore recognized in a medical or clinical context. The readership of the journal closely reflects its multi-disciplinary contents, being a balance of scientists, engineers and clinicians. The contents are in the form of research papers, brief reports, review papers and correspondence, whilst special interest issues and supplements are published from time to time. Disciplines covered include biomechanics and mechanobiology at all scales, bioengineering and use of tissue engineering and biomaterials for clinical applications, biophysics, as well as biomechanical aspects of medical robotics, ergonomics, physical and occupational therapeutics and rehabilitation.