Morphometric study of patella to assess the feasiblity of patellar resurfacing in patients undergoing total knee replacement

Abstract

: We aimed at determining about the suitability of implants available for Indian population by assessing the intra op measurement of patella in all its dimensions viz anteroposterior, superioinferior and mediolateral diameter in Indian patients.Also, we aimed at proving that whether any co-relation exists between radiological and intraoperative morphometry of patella. We also wanted to study whether any correlation exists between patellar size and anthropometric parameters like height and age.: 55 patients of grade 4 OA knee were selected for this study and pre op x-rays were obtained, AP View, Lat View, Skyline view and Merchant view. Preop Morphometery of patella was recorded on x-ray findings. All patients were operated by standard midline incision with medial parapatellar arthrotomy.Intra op measurement of patella was done via Vernier caliper and measurements were recorded.: Prospective cohort study. The smallest available patellar implant in India is about 8 mm in size which is not suitable for Indian patient.most of the patients were having patellar morphometery lower than the expected size for patellar resurfacement. Hence patellar resurfacement was not an option for many of the patients because of unavailability of patellar implants of appropriate size.: Hence in this study we conclude that there is a need of better designed implants for Indian patients as the presently available implants are mainly designed for western population making it unfeasible to resurface patella for Indian surgeons.