Abstract：
OBJECTIVE: Templating is the first step in achieving a successful total hip arthroplasty. We hypothesize that native head size is highly correlated with implanted cup size. Therefore, the purpose of this study is to look for a correlation between sizes of the intra-operative measurement of the femoral head and the implanted cup.
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.
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.
摘要：
目的：模板是成功完成全髋关节置换术的第一步。我们假设天然头部大小与植入的杯子大小高度相关。因此,这项研究的目的是寻找股骨头术中测量的大小与植入杯之间的相关性。
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。
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。
