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Finite element optimization analysis of minimally invasive screw treatment for Sanders typeⅡcalcaneal fracture / 中国骨伤
Article in Chinese | WPRIM | ID: wpr-879385
Responsible library: WPRO
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 fracturea 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.
Subject(s)

Full text: Available Index: WPRIM (Western Pacific) Main subject: Bone Screws / Humans / Calcaneus / Treatment Outcome / Finite Element Analysis / Fractures, Bone / Fracture Fixation, Internal Language: Chinese Journal: China Journal of Orthopaedics and Traumatology Year: 2021 Type: Article
Full text: Available Index: WPRIM (Western Pacific) Main subject: Bone Screws / Humans / Calcaneus / Treatment Outcome / Finite Element Analysis / Fractures, Bone / Fracture Fixation, Internal Language: Chinese Journal: China Journal of Orthopaedics and Traumatology Year: 2021 Type: Article