Total Hip Arthroplasty Using Imageless Computer-Assisted Hip Navigation: A Prospective Randomized Study

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• 作者：Richard Lass ; MD^a ; ; Bernd Kubista ; MD^a ; Boris Olischar ; MD^a ; Sophie Frantal^b ; Reinhard Windhager ; MD^a ; Alexander Giurea ; MD^a
• 关键词：accuracy assessment ; cup placement ; leg length discrepancy ; navigated total hip arthroplasty ; prospective randomized study
• 刊名：The Journal of Arthroplasty
• 出版年：April, 2014
• 年：2014
• 卷：29
• 期：4
• 页码：786-791
• 全文大小：1278 K

文摘

In a prospective randomized study of two groups of 65 patients each, we compared the acetabular component position when using the imageless navigation system compared to the freehand conventional technique for cementless total hip arthroplasty. The position of the component was determined postoperatively on computed tomographic scans of the pelvis. There was no significant difference for postoperative mean inclination (m>Pm> = 0.29), but a significant difference for mean postoperative acetabular component anteversion (m>Pm> = 0.007), for mean deviation of the postoperative anteversion from the target position of 15掳 (m>Pm> = 0.02) and for the outliers regarding inclination (m>Pm> = 0.02) and anteversion (m>Pm> < 0.05) between the computer-assisted and the freehand-placement group. Our results demonstrate the importance of imageless navigation for the accurate positioning of the acetabular component.