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Reconstruction of the artificial knee joint using a reverse engineering approach based on computer-aided design
D Darmanto1,2, R Novriansyah3, R Ismail1,4
1Department of Mechanical Engineering, Faculty of Engineering, Diponegoro University, Semarang, Indonesia.
Journal of Medical Engineering & Technology
|January 21, 2022
Summary
Optimizing artificial knee joint (AKJ) design with tailored posterior tibial slope (PTS) and posterior femoral condyle (PFC) enhances flexion angles for Middle Eastern and Asian populations.
Area of Science:
- Biomedical Engineering
- Orthopedic Surgery
- Biomechanics
Background:
- Total knee arthroplasty (TKA) aims to restore knee function, but achieving adequate flexion is crucial for patient mobility, especially in Middle Eastern and Asian populations.
- Existing TKA designs may not fully meet the anatomical and functional demands for greater range of motion in these demographics.
Purpose of the Study:
- To optimize the flexion angle in artificial knee joint (AKJ) design.
- To tailor the posterior tibial slope (PTS) and posterior femoral condyle (PFC) thickness for improved patient outcomes.
Main Methods:
- Utilized reverse engineering (RE) to obtain a 3D CAD model of a standard implant (DePuy, CS-Revision type).
- Reconstructed the CAD model with customized PTS and PFC components.
- Evaluated the resulting flexion angle range.
Main Results:
- Customized AKJ designs achieved a flexion angle range of 149.9°–166.7°.
- This range meets the motion requirements for Middle Eastern and Asian individuals.
Conclusions:
- The study provides a reference standard for designing AKJs with Asian ergonomics.
- Optimized AKJ designs can improve patient range of motion and quality of life.
