Accelerometer-Based Navigation Is as Accurate as Optical Computer Navigation in Restoring the Joint Line and Mechanical Axis After Total Knee Arthroplasty: A Prospective Matched Study

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• 作者：Graham Seow-Hng Goh ; MBBS ; Ming Han Lincoln Liow ; MBBS ; MRCS (Edin) ; MMed (Ortho) ; Winston Shang-Rong Lim ; MBBS ; Darren Keng-Jin Tay ; MBBS ; MMed (Ortho) ; FRCS (Edin) ; Seng Jin Yeo ; MBBS ; FRCS (Edin) ; FAMS ; Mann Hong Tan ; MBBS ; FRCS (Edin & Glasg) ; FAMS
• 关键词：total knee arthroplasty ; accelerometer-based navigation ; iASSIST ; mechanical axis ; alignment ; joint line
• 刊名：The Journal of Arthroplasty
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：31
• 期：1
• 页码：92-97
• 全文大小：352 K

文摘

The Zimmer iASSIST system is a novel accelerometer-based navigation system for TKA. 76 patients (76 knees) were prospectively matched for age, BMI, gender, diagnosis, and pre-operative scores, and underwent TKA using the iASSIST (n=38) or optical CAS (n=38). There were no significant differences in clinical outcomes or satisfaction rates at six months post-operatively (P>0.05). Mechanical axis was 1.8±1.3° in the iASSIST cohort versus 2.1±1.6° in the CAS cohort (P=0.543). There were no significant differences in number of outliers for mechanical axis (P=1.000), coronal femoral-component angle (P=0.693), coronal tibial-component angle (P=0.204) or joint line deviation (P=1.000). The duration of surgery was significantly longer in the CAS group (P<0.001), while the added cost of accelerometer-based navigation was approximately $1000 per operation.