Stress Distributions Affected by Different Filling Blocks in Medial Opening Wedge High Tibial Osteotomy
10.16156/j.1004-7220.2023.01.12
- VernacularTitle:不同填充块对内侧开放楔形胫骨高位截骨应力分布的影响
- Author:
Chengshuang YU
1
;
Jianxiong MA
1
;
Bin LU
1
;
Ying WANG
1
;
Haohao BAI
1
;
Hongzhen JIN
1
;
Xinlong MA
1
Author Information
1. Tianjin Key Laboratory of Orthopaedic Biomechanics and Medical Engineering, Institute of Orthopedics, Tianjin Hospital, Tianjin Universit
- Publication Type:Journal Article
- Keywords:
medial opening wedge high tibial osteotomy (MOWHTO);
filling block;
stress;
edge displacement
- From:
Journal of Medical Biomechanics
2023;38(1):E084-E089
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the influence from material and size of the filling block on stress distributions of the tibial osteotomy model. Methods The filling blocks with three different materials (iliac bone, cancellous bone and polyetheretherketone (PEEK)) and five different sizes were established and implanted to the tibial osteotomy models, respectively. The mechanical loads were applied on the model, the stress distribution and edge displacement of the model were analyzed. Results For three kinds of materials, the stress at proximal end of the tibia and the plate, as well as edge displacement in the model implanted with filling block by iliac bone material were lower than those of the cancellous bone and PEEK, but the filling block by iliac bone material had the highest stress. When the filling blocks with different sizes were implanted in osteotomy space, the stress distribution on each part of the tibial osteotomy and edge displacement were different. Especially when the width of the filling block was reduced from 30 mm to 10 mm, the peak stress of the proximal tibia, steel plate and filling block was increased by 49. 3% , 92. 7% and 54. 4% on average. Conclusions Different filling block parameters will affect the stress distribution in different parts of the tibial osteotomy. The research results provide the theoretical basis for parameter selection of the tibial osteotomy filling block in clinic.
