The relationship between shoe size and implant size and pain intensity after surgery in patients who are candidates for knee joint replacement

Abstract

Considering that total knee replacement surgery is increasingly being performed and taking into account the limitation related to the absence of some sizes of tibial and femoral components, we aimed to assess the relationship between the shoe size and the size of tibial and femoral components, Therefore, by estimating the size of these components before the operation, we can use the optimal size of component for the patient and prevent the complications caused by small or large components. Materials and Methods: The present study was and implemented with the participation of 100 patients who are candidates for total knee replacement. After collecting the demographic information, the foot size was measured the night before the surgery. The next day patients underwent TKA surgery. After the operation, the size of the tibial and femoral components used for the patient was determined. Using linear logistic regression, the predictive power of shoe size was evaluated. Results: In this study, shoe size was a significant predictive factor for both femoral and tibial components (P-Value<0.001). The values of R2 coefficients for tibial and femoral components were more than 0.5. Shoe size correctly predicted the size of tibial and femoral components in 93% and 96% of cases respectively with a deviation of one size.