Thickness of osteotomy affecting biomechanics of tibia cross-section in total knee arthroplasty
10.16156/j.1004-7220.2017.02.008
- VernacularTitle:膝关节置换术中胫骨截骨厚度对胫骨截面的生物力学影响
- Author:
Qing CHEN
1
;
Hua-Jun SHENG
;
Xing-Rui LI
;
Ling GUO
;
Qing-Hua YANG
;
Shu-Juan ZHU
;
Fa-Jin LV
Author Information
1. 重庆医科大学解剖学教研室
- Keywords:
Total knee arthroplasty(TKA);
Osteotomy thickness;
Tibia;
Biomechanics
- From:
Journal of Medical Biomechanics
2017;32(2):148-153
- CountryChina
- Language:Chinese
-
Abstract:
Objective To obtain different biomechanical conditions of the tibia section with different osteotomy thickness under different activity states,so as to provide theoretical basis for total knee arthroplasty (TKA) and patient activities after operation.Methods The three-dimensional models of lower limb were reconstructed and the proximal tibia was resect by 0 mm,5 mm,7 mm,9 mm,respectively,based on the principle of bone resection in TKA.The tibia models after osteotomy were assigned with the material properties,and the stress and strain of the tibia cross-section were then analyzed under the following activity states:standing,walking,running and climbing upstairs.Results The stress and displacement of the tibia cross-section increased with the increase of osteotomy thickness under the same activity state.The maximum stress and displacement of tibia cross-section with the same osteotomy thickness showed an increasing trend when the strength of activity increased.Conclusions For TKA in clinic,the stress and strain on tibia cross-section become larger with the thicker tibia osteotomy and the stronger postoperative activity.Excessive osteotomy in TKA and activity too intensively after TKA should be avoided,so as to reduce stress and strain of the tibia plateau and promote long-term life of the prosthesis.
