Finite element optimization analysis of minimally invasive screw treatment for Sanders typeⅡcalcaneal fracture

• Published in: Zhongguo gu shang Vol. 34; no. 2; p. 137
• Main Authors: Guo, Zong-Hui, Yan, Yong-Qing, Tang, Yin, Wang, Jun-Jie, Yang, Chang-Chun, Pang, Qing-Jiang
• Format: Journal Article
• Language: Chinese
• Published: China 25.02.2021
• Subjects: Bone Screws; Calcaneus - surgery; Finite Element Analysis; Fracture Fixation, Internal; Fractures, Bone - surgery; Humans; Treatment Outcome; Fractures; Finite element analysis; Calcaneus; Minimally invasive
• ISSN: 1003-0034
• DOI: 10.12200/j.issn.1003-0034.2021.02.008

To explore biomechanical characteristics of minimally invasive different screw fixations in treating Sanders typeⅡcalcaneal fractures. 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. Un