Biomechanical Comparison of Two-Point and Three-Point Fixation for Treating SandersⅢ Calcaneal Fracture
10.16156/j.1004-7220.2021.01.09
- VernacularTitle:两点固定和三点固定治疗跟骨SandersⅢ型骨折的生物力学比较
- Author:
Haowei ZHANG
1
;
LVLIN
1
;
Ying LIU
1
;
Wanju SUN
2
;
Wenxin NIU
3
;
Ming NI
2
Author Information
1. School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology
2. Department of Orthopaedics, Shanghai Peoples’ Hospital of Pudong New Area
3. Department of Rehabilitation, Tongji University School of Medicine
- Publication Type:Journal Article
- Keywords:
calcaneal fracture;
two-point fixation;
weight-bearing standing;
distal radius plate
- From:
Journal of Medical Biomechanics
2021;36(1):E055-E061
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the biomechanical feasibility of two-point fixation by distal radius plate for the treatment of SandersⅢ calcaneal fractures. Methods The three-dimensional (3D) finite element musculoskeletal foot model was established based on CT and MRI images, which comprised bones, muscles, plantar fascia, ligaments and soft tissues. After validation, the SandersⅢ calcaneal fracture models fixed by distal radial plate (two-point fixation) and calcaneal plate (three-point fixation) were established, so as to compare the biomechanical characteristics of two calcaneal models. Results The maximum stress of the two-point fixation and three-point fixation model was 324.70 and 407.90 MPa, respectively. The maximum displacements of the two models were 2.498 and 2.541 mm, respectively. There was no significant difference in the posterior articular surface displacement between the two models. In both models, the Bohler’s angle and Gissane’s angle were within the normal range. Conclusions The two-point fixation by distal radial plate can satisfy the biomechanical stability of calcaneal fracture treatment. Compared with traditional steel plate, the two-point fixation shows the advantage of smaller surgical trauma, more uniform overall stress distribution, early weight-bearing rehabilitation after surgery, which is a novel treatment recommended for treating calcaneal fractures.
