A CT Study of Accuracy and Precision of Prosthesis Positioning in Domestic Robot-Assisted Total Hip Arthroplasty
Objective:To investigate the accuracy and precision of prosthesis positioning in domestic robot-assisted total hip arthroplasty through postoperative CT evaluation.Methods:The clinical data of 38 patients(38 hips)who underwent domestic robot-assisted total hip arthroplasty in our hospital from March 2023 to July 2023 were retrospectively analyzed.Posterolateral approach and postoperative CT scan were performed in all cases.Acetabular cup inclination,cup anteversion,combined offset and leg length difference were measured postoperatively and compared with the planed preoperative data.Pearson correlation analysis was used to calculate the relevance.Results:Compared with the preoperative plan,the deviations of acetabular cup inclination,cup anteversion,combined offset difference and leg length difference were(3.3±2.5)˚,(2.9±2.2)˚,(2.2±1.9)mm and(2.5±2.1)mm,respectively.The Pearson correlation coefficient was 0.600(P<0.001),0.820(P<0.001),0.715(P<0.001)and 0.671(P<0.001)respectively.97.4%(37/38)of the inclination angles and 84.2%(32/38)of the anteversion angles were located in the"Lewinnek safe zone"postoperatively.78.9%(30/38)of the combined offset differences were within 5mm and 97.4%(37/38)of the leg length differences were within 10mm.Conclusion:The domestic robot-assisted total hip arthroplasty can satisfactorily carry out the preoperative plan and obtain accurate acetabular cup placement.
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万方数据
