Management of mandibular angle fracture.

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Abstract

[Indexed for MEDLINE] 19. Comput Methods Biomech Biomed Engin. 2024 Jul;27(9):1141-1149. doi: 10.1080/10255842.2023.2231115. Epub 2023 Jul 6. Biomechanical study of different fixation methods for posterior malleolus fracture. Sun D(1), Shi G(1), Du K(1)(2). Author information: (1)School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China. (2)Department of Orthopedics, Shidong Hospital Affiliated to University of Shanghai for Science and Technology, Shanghai, China. In this study, the biomechanical effect of six fixation methods for the treatment of posterior malleolus fracture (PMF) were analyzed by finite element method. Fixation models include five different cannulated screw fixation models (0°, 5°, 10°, 15°, 20°) and a posterior plate fixation model. The von Mises stress (VMS) and displacement were used as criteria to evaluate the biomechanical efficiency of the different fixation models. The results demonstrated that the VMS and displacement will increase as the load increases. The buttress plate has better fixed strength and biomechanics results than screws. When the screw fixation angle is 15°, the model has better fixed strength and biomechanical stability than other screws fixation models. Therefore, we recommend the screws fixation with angle of 15° for posterior malleolus fracture, which can be used to guide clinical operation. DOI: 10.1080/10255842.2023.2231115