[Feasibility study on measuring anteversion angle of acetabular prosthesis after total hip arthroplasty using arbitrary point method].

Q3 Medicine

中国修复重建外科杂志 Pub Date : 2025-04-15 DOI:10.7507/1002-1892.202501009

Bowen Li, Longyuan Li, Heng Zhang

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Abstract

Objective: To explore the reliability and accuracy of the arbitrary point method for measuring the anteversion angle of acetabular prosthesis after total hip arthroplasty (THA) based on pelvic X-ray films.

Methods: The clinical data of 23 patients (25 hips) who underwent THA between December 2018 and September 2023 and met the selection criteria were retrospectively analyzed. Among them, there were 16 males and 7 females, with an average age of 57.6 years (range, 34-81 years); 13 hips had THA on the left side and 12 on the right side. There were 19 cases (21 hips) of osteonecrosis of the femoral head, 2 cases (2 hips) of femoral neck fractures, 1 case (1 hip) of developmental dysplasia of the hip, and 1 case (1 hip) of osteoarthritis. After THA, all patients underwent X-ray examination and CT scan. Three physicians measured the anteversion angle of acetabular prosthesis using the arbitrary point method and the CT measurement method respectively, and repeated the measurements three times. The results of the two measurement methods were compared, and the intraclass correlation coefficient (ICC) was employed to assess the reproducibility of the methods.

Results: The anteversion angles of acetabular prosthesis were (15.87±7.73)° measured by the arbitrary point method, and (15.31±7.89)° measured by CT measurement method. There was no significant difference between the two methods ( t=1.515, P=0.143). The ICC of the measurement results by the arbitrary point method for the three physicians were 0.97 ( P<0.001), 0.96 ( P<0.001), and 0.96 ( P<0.001), respectively; and the ICC of the measurement results by CT method were 0.93 ( P<0.001), 0.93 ( P<0.001), and 0.94 ( P<0.001), respectively.

Conclusion: The arbitrary point method for measuring the anteversion angle of acetabular prosthesis after THA based on pelvic X-ray film is easy to operate, accurate, and has high reproducibility.

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[任意点法测量全髋关节置换术后髋臼假体前倾角的可行性研究]。

目的：探讨基于骨盆x线片的任意点法测量全髋关节置换术后髋臼假体前倾角的可靠性和准确性。方法：回顾性分析2018年12月至2023年9月期间符合选择标准的23例（25髋）THA患者的临床资料。其中男性16例，女性7例，平均年龄57.6岁（范围34 ~ 81岁）；13髋左侧有THA， 12髋右侧有THA。股骨头坏死19例（21髋），股骨颈骨折2例（2髋），髋关节发育不良1例（1髋），骨关节炎1例（1髋）。术后所有患者均行x线及CT检查。3名医生分别采用任意点法和CT测量法测量髋臼假体前倾角，并重复测量3次。比较两种测量方法的结果，并采用类内相关系数（ICC）评价方法的可重复性。结果：任意点法测髋臼假体前倾角为（15.87±7.73）°，CT测量法测髋臼前倾角为（15.31±7.89）°。两种方法比较差异无统计学意义（t=1.515， P=0.143）。3位医师任意点法测量结果的ICC值均为0.97 （ppppppp）。结论：基于骨盆x线片的任意点法测量THA后髋臼假体前倾角操作简便、准确，重现性高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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