Tijou Antoine, Rosi Giuseppe, Hernigou Philippe, Flouzat-Lachaniette Charles-Henri, Haïat Guillaume
Laboratoire de Modélisation et de Simulation Multi-Echelle, CNRS, UMR CNRS 8208, 61 Avenue du Général de Gaulle, 94010 Créteil, France.
Laboratoire de Modélisation et de Simulation Multi-Echelle, UMR CNRS 8208, Université Paris-Est, 61 Avenue du Général de Gaulle, 94010 Créteil, France.
Sensors (Basel). 2017 Dec 27;18(1):62. doi: 10.3390/s18010062.
The acetabular cup (AC) implant stability is determinant for the success of cementless hip arthroplasty. A method based on the analysis of the impact force applied during the press-fit insertion of the AC implant using a hammer instrumented with a force sensor was developed to assess the AC implant stability. The aim of the present study was to investigate the performance of a method using a hammer equipped with strain sensors to retrieve the AC implant stability. Different AC implants were inserted in five bovine samples with different stability conditions leading to 57 configurations. The AC implant was impacted 16 times by the two hammers consecutively. For each impact; an indicator (respectively ) determined by analyzing the time variation of the signal corresponding to the averaged strain (respectively force) obtained with the stress (respectively strain) hammer was calculated. The pull-out force was measured for each configuration. was significantly correlated with (R² = 0.79) and (R² = 0.80). The present method has the advantage of not modifying the shape of the hammer that can be sterilized easily. This study opens new paths towards the development of a decision support system to assess the AC implant stability.
髋臼杯（AC）植入物的稳定性是无水泥髋关节置换术成功的决定性因素。开发了一种基于使用配备力传感器的锤子对AC植入物进行压入配合插入过程中施加的冲击力分析的方法，以评估AC植入物的稳定性。本研究的目的是研究使用配备应变传感器的锤子来获取AC植入物稳定性的方法的性能。将不同的AC植入物插入具有不同稳定性条件的五个牛样本中，产生57种配置。用两把锤子依次对AC植入物进行16次撞击。对于每次撞击，计算一个指标（分别为 ），该指标通过分析与用应力（分别为应变）锤子获得的平均应变（分别为力）对应的信号的时间变化来确定。测量每种配置的拔出力 。 与 （R² = 0.79）和 （R² = 0.80）显著相关。本方法的优点是不改变易于消毒的锤子的形状。这项研究为开发评估AC植入物稳定性的决策支持系统开辟了新途径。
