van Egmond Jeroen Cornelis, Verburg Hennie, Hesseling Brechtje, Mathijssen Nina Maria Cornelia
Department of Orthopedic Surgery, Reinier de Graaf Groep, AD Delft, The Netherlands.
J Knee Surg. 2020 Mar;33(3):260-264. doi: 10.1055/s-0039-1677841. Epub 2019 Feb 4.
Preoperative planning is an important phase of total joint arthroplasty. Current template programs and methods only provide moderate accuracy for implant size prediction. Recently, a relationship between shoe size and implant size was found. We hypothesized that shoe size shows a high percentage of agreement for implant size of both femoral and tibial component size in primary total knee arthroplasty (TKA). The aim of this study was to investigate the correlation and agreement between shoe size and TKA implant size. We performed a retrospective cohort study. Of all patients, who underwent primary TKA between September 2013 and March 2016, shoe size and knee implant sizes were collected. Cross-tabulation was used to determine the correlation and agreement between shoe size and implant size. A total of 489 patients (498 TKA) were included. The correlation coefficient for femoral and tibial component with shoe size was 0.751 and 0.759, respectively. When a deviation of ± 1 component size was allowed, shoe size gave at least 94% agreement score for femoral component and at least 86% agreement score in tibial component. We conclude that both femoral and tibial component size have a good correlation with shoe size. Therefore, shoe size may be used as a valuable predictor in preoperative implant size planning for primary TKA. The level of evidence for this study was Level IV.
术前规划是全关节置换术的重要阶段。目前的模板程序和方法在植入物尺寸预测方面仅提供中等准确性。最近，人们发现鞋码与植入物尺寸之间存在关联。我们假设在初次全膝关节置换术（TKA）中，鞋码与股骨和胫骨组件尺寸的植入物尺寸具有较高的一致性百分比。本研究的目的是调查鞋码与TKA植入物尺寸之间的相关性和一致性。我们进行了一项回顾性队列研究。收集了2013年9月至2016年3月期间接受初次TKA的所有患者的鞋码和膝关节植入物尺寸。使用交叉表来确定鞋码与植入物尺寸之间的相关性和一致性。共纳入489例患者（498例TKA）。股骨和胫骨组件与鞋码的相关系数分别为0.751和0.759。当允许±1个组件尺寸的偏差时，鞋码对股骨组件的一致性得分至少为94%，对胫骨组件的一致性得分至少为86%。我们得出结论，股骨和胫骨组件尺寸与鞋码均具有良好的相关性。因此，鞋码可作为初次TKA术前植入物尺寸规划中有价值的预测指标。本研究的证据级别为IV级。
