C7: Biomechanics

3-D RECONSTRUCTION OF PF JOINT FOR DESIGNING UNICOMPARTMENTAL KNEE PROSTHESIS FOR THAI PEOPLE


Warat Puttatananun, Chonrawan Kulchaisawat, Somprasong Kaewjumphot, Chamaiporn Sukjamsri,
Wongwit Senavongse


Srinakharinwirot University, Thailand


Total knee replacement is a conventional surgical procedure to replace the knee prosthesis to the knee joint. However, the problem is Thai’s knee sizes and other countries’ knee sizes are different due to Thai’s or Asian’s have smaller sizes than the others (European, African, etc.) In addition, the difference sizes for gender (between male and female) add more difficulties as almost all knee implants are made for other countries. Although they have the smallest size of knee implant, it is still not suitable for some people in Thailand or Asian. Therefore, there have not been standard sizes for Thai people. Moreover, the popular knee replacement surgery is Total Knee Replacement (TKR) which loses a lot of bone tissues compared with Unicompartmental knee replacement technique. 

Thus, TKR may destroy the good bony parts, take time to heal due to a lot of damage tissues and cost a lot more.

The objectives of this research were to study how to reconstruct 3D model of the patellofemoral joint from the MRI data, to measure size of Thai’s knee joint that includes femur, patella and tibia for comparing proportion of the measured data in order to select the one that has the least errors and use Finite Element Analysis method to find mesh convergence for analyzing the stress in the knee joint. The findings will be used for designing the Unicompartmental knee prosthesis that is suitable for Thai population in the future.

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