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J Knee Surg 2020; 33(03): 260-264
DOI: 10.1055/s-0039-1677841
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

The Correlation of Shoe Size and Component Size of Primary Total Knee Arthroplasty

Jeroen Cornelis van Egmond 
1   Department of Orthopedic Surgery, Reinier de Graaf Groep, AD Delft, The Netherlands
,
Hennie Verburg
1   Department of Orthopedic Surgery, Reinier de Graaf Groep, AD Delft, The Netherlands
,
Brechtje Hesseling
1   Department of Orthopedic Surgery, Reinier de Graaf Groep, AD Delft, The Netherlands
,
Nina Maria Cornelia Mathijssen
1   Department of Orthopedic Surgery, Reinier de Graaf Groep, AD Delft, The Netherlands
› Author Affiliations
Further Information

Publication History

13 May 2018

16 December 2018

Publication Date:
04 February 2019 (online)

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Abstract

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.

Keywords

total knee arthroplasty - preoperative planning - shoe size - template

Authors' Contributions

J.E. performed the data collection and data analysis. He wrote and revised the manuscript. H.V. operated several of the included patients, designed the study, and critically reviewed the manuscript. B.H. supported data collection and data analysis and critically reviewed the manuscript. N.M. designed the study, supported data analysis, and critically reviewed the manuscript. All authors read and approved the final version of the manuscript.