Finite element optimization analysis of minimally invasive screw treatment for Sanders typeⅡcalcaneal fracture.
10.12200/j.issn.1003-0034.2021.02.008
- Author:
Zong-Hui GUO
1
;
Yong-Qing YAN
1
;
Yin TANG
1
;
Jun-Jie WANG
1
;
Chang-Chun YANG
1
;
Qing-Jiang PANG
1
Author Information
1. Department of Orthopaedics Centre, Huamei Hospital, University of Chinese Academy of Sciences, Ningbo 315010, Zhejiang, China.
- Publication Type:Journal Article
- Keywords:
Calcaneus;
Finite element analysis;
Fractures;
Minimally invasive
- MeSH:
Bone Screws;
Calcaneus/surgery*;
Finite Element Analysis;
Fracture Fixation, Internal;
Fractures, Bone/surgery*;
Humans;
Treatment Outcome
- From:
China Journal of Orthopaedics and Traumatology
2021;34(2):137-142
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE:To explore biomechanical characteristics of minimally invasive different screw fixations in treating Sanders typeⅡcalcaneal fractures.
METHODS:Dicom data of calcaneus by CT scan were input into Mimics 21.0 software and Ansys15.0 software to construct three-dimensional finite element digital model of calcaneus;this model was input into UG NX 10.0 software, and calcaneus was cut according to Sanders classification to establish Sanders typeⅡ calcaneus model with posterior articular surface collapse;then simulated minimally invasive screw internal fixation after calcaneal fracture:a screw from posterior articular surface was used to outside-in fix sustentaculum tali, other 4 screws were used to fix calcaneus by different methods through calcaneal tuberosity, and 4 different calcaneal models were obtained. Under the same conditions, 4 types of internal fixation models were loaded respectively, and nonlinear finite element analysis was performed to calculate the stress distribution of different internal fixation models.
RESULTS:Under the same condition of loading, the model 3 had smaller displacement value, maximum calcaneus displacement value and maximum equivalent stress value of the screw than other three internal fixation models, and the stress was more dispersed.
CONCLUSION:In minimally invasive screw internal fixation of calcaneus fracture, after 1 sustentaculum tali screw fixation, 2 screws crossed fix posterior articular surface from calcaneal tuberosity, 2 screws fix parallelly calcaneocuboid joint from calcaneal tuberosity are more suitable for biomechanical requirements, and could provide basic theory for clinical treatment.
