Abstract

Objective: Our primary goal is to investigate the biomechanical behavior of the primary reconstruction plates when used to reconstruct a deffect post hemiresection of the mandible, using finite element analysis (F.E.A.). The aim of this paper is to find out if, when used to reconstruct jaw defects after a hemi resection of the mandible without any bone graft, the plate offers enough stability and a good mechanical performance. Furthermore, we investigate material’s fatigue. Materials and methods: Starting with a 3D reconstruction from CT images, we made a study model reproducing the complex geometry of the mandible-primary reconstruction plate binomial, on which we applied forces corresponding to the muscular tractions. Using F.E.A., we measured the stress generated both in the bone and inside the plate. We realized a static structural analysis to determine the total deformation, as well as the equivalent stress. Also, we investigated the life span of the plate. Results: Our analysis showed a good biomechanical performance of the mandibular primary reconstruction plates. Also, we observed a good lifespan. Conclusion: Mandibular primary reconstruction plates can be used, even without any bone graft, for bridging a defect post hemi resection of the mandible, showing good biomechanical performance and stability and a long lifespan.

Authors and Affiliations