METHODS: This is a monocentric observational study conducted from December 2018 till January 2023. All patients admitted for a primary total hip arthroplasty were included and retrospectively reviewed. Intra-operative femoral head measurement, radiographic femoral head diameter, templated (planned) cup size, and definitive implanted cup size were recorded.
RESULTS: The sample included 154 patients (85 female and 69 males) with a mean age of 66.2 ± 10.4 years. There were 157 THA cases; 82 on the right side and 75 on the left side. The native head size and acetate template on digital radiographs were the most significantly positively correlated with cup size (P < 0.0001) while the radiological head size was significantly negatively correlated with cup size (P = 0.009). The implanted cup was on average 2 ± 2 mm bigger than the native head size measured intra-operatively.
CONCLUSIONS: The native femoral head diameter measured intra-operatively is a simple and reliable tool to help the surgeons choose the proper size of the acetabular cup, preventing complications during surgery hence optimizing results post operatively. This technique would contribute to a more ecofriendly orthopaedic reconstructive surgery.
方法:这是一项从2018年12月至2023年1月进行的单中心观察研究。纳入并回顾性分析了所有接受初次全髋关节置换术的患者。术中股骨头测量,放射学股骨头直径,模板(计划)杯尺寸,并记录明确的植入杯大小。
结果:样本包括154名患者(85名女性和69名男性),平均年龄为66.2±10.4岁。有157例THA;右侧82例,左侧75例。数字X射线照片上的天然头部大小和乙酸模板与杯子大小呈最显著正相关(P<0.0001),而放射学头部大小与杯子大小呈显著负相关(P=0.009)。植入的杯比术中测量的天然头部尺寸平均大2±2mm。
结论:术中测量的天然股骨头直径是一种简单可靠的工具,可以帮助外科医生选择合适尺寸的髋臼杯,预防手术期间的并发症,从而优化术后结果。该技术将有助于更环保的骨科重建手术。