Effects of the Amount of Proximal Tibia Resection on the Bone Strength of Prepared Bone Surface: A FEM Study.
10.4055/jkoa.2009.44.5.507
- Author:
Kwang Kyoun KIM
1
;
Ye Yeon WON
;
Myong Hyun BAEK
;
WenQuan CUI
;
Soon Haeng KWON
;
Joo Hong LEE
;
Yong Beum KIM
Author Information
1. Department of Orthopedic Surgery, Gongju Mediccal Center, Gongju, Korea. oskkk7@yahoo.co.kr
- Publication Type:Original Article
- Keywords:
Tibia;
Osteoarthritis;
Finite element analysis;
Ultimate stress;
Total knee arthroplasty
- MeSH:
Arthroplasty;
Finite Element Analysis;
Humans;
Joints;
Knee;
Osteoarthritis;
Osteoarthritis, Knee;
Sprains and Strains;
Tibia
- From:The Journal of the Korean Orthopaedic Association
2009;44(5):507-513
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: We wanted to evaluate the mechanical strength of proximal tibia as resection distance increased from the joint surface. MATERIALS AND METHODS: We obtained the CT images of twenty knee osteoarthritis patients undergoing total knee arthroplasty. The finite element models were created based on the computed tomography images. The 8-node hexahedron element was made from BIONIX(TM) (CANTIBio. Co, Suwon, Korea), which is automatic mesh generation software program. The finite element model of the proximal tibia was resected at 6 mm, 8 mm, 10 mm, 12 mm, 15 mm and 18 mm from the lateral joint surface. A 1% strain rate was applied to a model by using HyperMesh(TM) software (Altair Engineering. Inc, Seattle, USA). The ultimate stress was calculated from the finite element analysis with using ANSYS 9.0 (ANSYS. Inc, Orlando, USA). RESULTS: The mean ultimate stress was 906.84 MPa, 877.22 MPa, 895.93 Mpa, 852.70 MPa, 742.90 Mpa and 585.51 Mpa at the 6 mm, 8 mm, 10 mm, 12 mm, 15 mm and 18 mm resection levels. As compare to the 6 mm resection level, the bone strengths at 15 mm and 18 mm were decreased with statistical significance (15 mm: p=0.005, 18 mm: p=0.000). CONCLUSION: The ultimate stress was decreased as the resection distance increased from the joint surface. But within a 12 mm resection distance from the lateral condyle articular surface of the tibia, the ultimate stress was not significantly decreased (p>0.05).
