In vitro evaluation of acetabular host bone coverage and cemented cup stability in total hip arthroplasty

IF 1.4 3区医学 Q4 ENGINEERING, BIOMEDICAL

Clinical Biomechanics Pub Date : 2025-04-30 DOI:10.1016/j.clinbiomech.2025.106541

Yu Takeda , Yuta Osaka , Cameron P. Brown , Shigeo Fukunishi , Ross W. Crawford , Toshiya Tachibana

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引用次数: 0

Abstract

Background

The percentage of coverage by host bone required to achieve adequate initial cement cup fixation has not yet been determined. Therefore, in this study, we evaluated the relationship between the acetabular bone coverage and the initial cup fixation strength.

Methods

Three different defect models were used as minimum fixation models in this study along with two reconstructed models (a cup center-edge angles −10°, −5°, 0°, the bulk cement model, and the bulk bone model). Five each of models were prepared for testing. A cyclic loading test was performed to assess the initial stability of the cup based on the vertical displacement of the femoral head. All models were subjected to cyclic load testing for one million cycles.

Findings

Under cyclic loading conditions, vertical displacement of the femoral head gradually increased as the cup center-edge angle changed from 0° to −10°, with vertical displacement at the end of the test for each model being greatest at the cup center-edge angle of −10° and least at the cup center-edge angle 0°. A statistical significance was observed in all comparisons among the individual models. (P < 0.05).

Interpretation

This study provides valuable insights into the significance of acetabular host bone coverage on the initial stability of cemented cups. It supports the clinical practice of aiming for host bone coverage with a cup center-edge angle >0° to ensure long-term stability in case of primary total hip arthroplasty cases.

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全髋关节置换术中髋臼宿主骨覆盖和骨水泥杯稳定性的体外评估

背景：达到足够初始水泥杯固定所需的宿主骨覆盖的百分比尚未确定。因此，在本研究中，我们评估了髋臼骨覆盖与初始杯固定强度之间的关系。方法采用三种不同的缺损模型作为最小固定模型，并建立两种重建模型（杯形中心边缘角为- 10°，- 5°，0°，大块骨水泥模型和大块骨模型）。每个模型准备了5个用于测试。在股骨头垂直位移的基础上进行循环加载试验以评估罩杯的初始稳定性。所有模型均进行了100万次循环荷载试验。在循环加载条件下，股骨头垂直位移随股骨头中心角从0°到- 10°的变化而逐渐增大，各模型试验结束时股骨头垂直位移在股骨头中心角为- 10°时最大，股骨头中心角为0°时最小。各模型间比较均有统计学显著性。(P & lt;0.05)。本研究为髋臼宿主骨覆盖对骨水泥杯初始稳定性的重要性提供了有价值的见解。支持临床实践，在初次全髋关节置换术病例中，瞄准宿主骨覆盖，杯口中心边缘角为0°，以确保长期稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.