Authors: Kazunari Kuroda Tamon Kabata Toru Maeda Yoshitomo Kajino Hiroyuki Tsuchiya
Publish Date: 2014/03/06
Volume: 134, Issue: 5, Pages: 727-733
Abstract
Poor longterm results of total hip arthroplasty THA can result from femoral component misalignment There are few reports that discuss the effectiveness of intraoperative radiographs for placing femoral components This study is a retrospective review to find out the usefulness of intraoperative radiographs in detecting and improving the femoral component misalignment in posteriorapproached primary THAThe study group included 150 primary THAs performed between September 2009 and April 2012 After the trial component insertion in lateral decubitus position intraoperative radiography was performed The surgeon assessed the femoral component position in three aspects alignment leg length and offset If it is not following the preoperative template the surgeon makes the intraoperative adjustments to change the femoral component position After the operation postoperative radiograph was taken the same parameters were measured and were compared to intraoperative findings The changes in each parameter were classified into three categories satisfactory no change and unsatisfactory Among the three parameters if one is satisfactory and the others are not unsatisfactory we defined it as accurate positioning of the femoral componentIntraoperative adjustments were made in 122 cases 813 The adjustments included changes in the component size 353 component alignment 386 femoral offset 140 and additional femoral neck cuts 560 As a result accurate positioning was successfully achieved in 112 cases 918 by taking intraoperative radiographs
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