Department of Biomedical Engineering, University of California, Davis, Sacramento, California, USA.
Department of Mechanical Engineering, University of California, Davis, Sacramento, California, USA.
Int J Med Robot. 2020 Aug;16(4):e2104. doi: 10.1002/rcs.2104. Epub 2020 Apr 1.
The objectives were to determine errors in femoral anteversion (FA), femoral offset (FO), and vertical offset (VO) with robot-assisted total hip arthroplasty (THA) and how consistently these errors are within clinically desirable limits of ±5° and ±5 mm. After preoperative planning, robot-assisted THAs were performed on twelve cadaveric specimens. The error between achieved and planned component placements was used to determine bias (mean error) and precision (SD of error). The percent of the population within clinically desirable limits was determined. Bias of 1.5° and 2.7 mm occurred for FA and VO, respectively. Precision was 1.2° for FA and better than 1.5 mm for FO and VO. The percent of population within clinically desirable limits was at least 95% for FA and at least 99% for FO. With limits of ±7 mm, at least 95% of the population was within these limits for VO. Robot-assisted THA may improve clinical outcomes.
目的是确定机器人辅助全髋关节置换术（THA）中股骨前倾角（FA）、股骨偏心距（FO）和垂直偏心距（VO）的误差，以及这些误差在临床可接受的±5°和±5mm 范围内的一致性。在术前规划后，对 12 具尸体标本进行了机器人辅助 THA。使用实际组件位置与计划组件位置之间的误差来确定偏差（平均误差）和精度（误差的标准差）。确定了在临床可接受范围内的人群比例。FA 和 VO 的偏差分别为 1.5°和 2.7mm。FA 的精度为 1.2°，FO 和 VO 的精度优于 1.5mm。FA 的人群比例至少为 95%，FO 的人群比例至少为 99%。在±7mm 的限制下，VO 的至少 95%的人群在这些限制内。机器人辅助 THA 可能改善临床结果。
