Background: The prosthesis of knee joint in total knee arthroplasty (TKA) can give better fixation and stabilization if it’s chosen properly. Most of prosthesis have been designed to be compatible with western population, not for Asian population. Whether the implant size need to be adjusted with ethnics and gender still being a controversy.

Aim: to define whether the morphology of Distal Femur, Proximal Tibia, and Patella among men and women in Indonesia have discrepancy and to assess compatibility of the prosthesis size in Indonesia

Methods: This study was a descriptive cross sectional study that conducted in Soeharso’s Orthopaedic Hospital – Surakarta, Indonesia, using purposive quota sampling methods. The inclusion criteria MRI knee joint of men and women (age ? 18 years old) which have soft tissue injury of knee joint. The morphological measurement of Distal Femur and Proximal Tibia use certain Software. Then, the data were analyzed with SPSS ver.17 using independent T-Test.

Results:  From 130 patients, found that Women’s fML, tMAP and tLAP were narrower than men’s. While the ratio aspect of implant femur compared to gender, showed that it was not compatible for men, but more compatible for women.

Conclusion: There is discrepancy of morphological size of Distal Femur, Patella, and Proximal Tibia among men and women. It cause incompatibility of using TKA implant in men patients in Indonesia, which more suitable for women size.