| Objective To provide clinical guidance for the selection of a suitable lateral unicompartmental knee arthroplasty (UKA) component through clinical research on the sizes of such components actually used in Chinese patients.Methods This was a retrospective analysis of the data from 241 patients who underwent lateral UKA treatment using common devices (LINK Orthopaedics China Co., Ltd., Beijing, P. R. China) from June 2015 to March 2020 in Yangpu Hospital Affiliated to Tongji University. The distribution of component size was studied and the optimal match of tibial-femoral component was identified. The relationship between demographic data (age, gender, left or right knee, height, body mass index (BMI) and implanted tibia and femoral component size were analyized by Logistic single regression.Results The distribution of tibial component size was: small 8.7%, medium 60.6%, and large 30.7%. The distribution of femoral prosthesis size was: small 26.1%, medium 57.3%, and large 16.6%. Age, laterality and BMI had no significant correlations with tibial or femoral component sizes, whereas height and gender did (P<0.05). The success rate for selecting the tibial component accurately before surgery was 75.9%, that for the femoral component was 64.7%, and that for the femoral one based on the tibial component was 62.2%.Conclusion Using these data, surgeons treating Chinese patients undergoing lateral UKA can choose tibial and femoral component sizes before surgery more accurately based on height and gender. However, there is a need for more cases to establish a more suitable reference standard. |
