The establishment of digital model about sagittal split ramus osteotomy and stability analysis of 3 different fixation methods

Abstract

Abstract: PURPOSE: To establish the digital model about sagittal split ramus osteotomy and discuss the stress and displacement of 3 different fixation methods. METHODS: Three-dimensional reconstruction software Mimics and Geomagic were used to establish the three-dimensional entity model of mandible, and simulated sagittal split ramus osteotomy and fixation. Three-dimensional finite element model was established by mesh generation through ANSYS. After boundary constraint the occlusal load of 132N on the bilateral lower first molars was applied. RESULTS: Three-dimensional finite element models of sagittal split ramus osteotomy and 3 different fixation methods were established, and the biomechanical character of stress and displacement after occlusal load preoperatively and after splitting mandibles were found. CONCLUSIONS: As the stress distribution tends to uniformity and the displacement at split area is the least one, the fixation by bicortical screws in inverted-L position after sagittal split ramus osteotomy is the stablest of the 3 fixation methods.

Key words: Sagittal split ramus osteotomy, Stress, Displacement, Stability

CLC Number:

R782.1

YIN Xue-min, ZHANG Jun-wei, REN Xiao-xu, XU Guo-xiang, LIU Xiao. The establishment of digital model about sagittal split ramus osteotomy and stability analysis of 3 different fixation methods[J]. Shanghai Journal of Stomatology, 2013, 22(3): 241-246.

References

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