Department of Orthopaedic Medical Engineering, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan.
Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8, Nishishimbashi, Minato-ku, Tokyo, 105-8461, Japan.
Int Orthop. 2019 Aug;43(8):1807-1814. doi: 10.1007/s00264-018-4113-6. Epub 2018 Aug 22.
To avoid malalignment of components during hip resurfacing arthroplasty (HRA), we used a computed tomography (CT)-based navigation system for guidance. This study aimed to evaluate the clinical accuracy and precision of HRA performed using the CT-based navigation systems.
HRA was performed on 17 hips guided by the CT-based navigation systems. We measured cup alignment deviation, deviation of the stem position, and alignment from the plan by image matching between pre-operative and post-operative CT images.
Cup anteversion was within 5° of that in the plan in all cases. Cup inclination was within 5° of that in the plan in 82.4% and within 10° in all cases. The angular difference of the stem was within 5° in all cases, and the entry point of the stem was within 4 mm in all cases.
The CT-based navigation system for HRA guided accurate component placement according to the plan.
为了避免髋关节表面置换术（HRA）过程中组件的对位不良，我们使用了基于计算机断层扫描（CT）的导航系统进行引导。本研究旨在评估基于 CT 的导航系统引导的 HRA 的临床准确性和精确性。
使用基于 CT 的导航系统对 17 髋进行了 HRA。我们通过术前和术后 CT 图像之间的图像匹配来测量杯的对准偏差、柄的位置偏差以及与计划的对准。
所有情况下，杯前倾角均在计划值的 5°以内。82.4%的情况下杯倾斜度在计划值的 5°以内，所有情况下均在 10°以内。所有情况下，柄的角度差均在 5°以内，所有情况下柄的入口点均在 4mm 以内。
基于 CT 的 HRA 导航系统可根据计划引导准确的组件放置。
