Biomechanical analysis of calcaneal sustentaculum tail sustentacular screw in treatment of Sanders type Ⅱ fractures
10.3760/cma.j.cn121382-20240512-00506
- VernacularTitle:跟骨载距突置钉治疗Sanders Ⅱ型骨折的生物力学分析
- Author:
Guangsheng TANG
1
;
Qi WANG
;
Yao XU
;
Bing WANG
;
Jianning SUN
;
Deguang WANG
Author Information
1. 南京医科大学康达学院基础医学部人体解剖学教研室，连云港 222000
- Keywords:
Calcaneus;
Fracture;
Sustentaculum tail;
Three-dimensional reconstruction;
Finite element analysis;
Biomechanics
- From:
International Journal of Biomedical Engineering
2024;47(5):449-456
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To construct a finite element analysis model for the application of sustentaculum tail sustentacular screw in the treatment of calcaneal fracture of Sanders type Ⅱ. The finite element analysis method was used to study the effectiveness of the simulation treatment of Sanders type Ⅱ calcaneal fracture.Methods:A complete adult calcaneal specimen that was not affecting the normal quality of bone after teaching in the Department of Human Anatomy, Kangda College of Nanjing Medical University from 2021 to 2022 second semester was selected. A micro CT scan was performed to obtain data. The three-dimensional model of the calcaneus was reconstructed by the software of Mimics and Geomagic Wrap. The internal fixation and fracutre model were drawn using SolidWorks software. The obtained data were imported into the finite element analysis software for material assignment and meshing to obtain a three-dimensional finite element model. The load and boundary constraints were applied to each model to perform finite element analysis and calculation, and the stress and displacement of the model were extracted. Finally, the experimental screw placement of the calcaneus loading process was verified.Results:The three-dimensional model of calcaneal fracture had a high degree of appearance simulation, complete morphological structure, no defect, and was consistent with the size of the solid calcaneus. After surgical treatment, the anatomical reduction of each fracture model was good, the steel plate fit to the bone surface, and the screw did not protrude outside the model. There was no deformation or damage to the whole internal fixation, the grid division was clear, and the number was relatively uniform and consistent. The maximum stress in each type of calcaneal fracture model was in the internal fixation, and the overall stress was uniformly distributed in each component. The maximum displacement distance of each type of calcaneal fracture was less than 0.13 mm, and the angles and lengths of nails were accurate. The tip of the Kirschner wires was located in the sustentaculum tail. There was no rupture of the sustentaculum tali and no protrusion of the Kirschner wires.Conclusions:The internal fixation is an effective method to treat the Sanders type Ⅱ calcaneal fractures by using sustentaculum tail sustentacular screws.
