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The aim of this study is to compare the biomechanics of different surgical methods and to investigate the best approach for reconstructing the mandibular body and ramus defect. Five finite element models based on different reconstructive methods were simulated. Stress, strain, and displacement of connective bone sections were calculated for five models and compared. The models were printed using a 3D printer, and stiffness was measured using an electromechanical universal testing machine. The postoperative follow\u2010up cone beam computed tomography (CBCT) was taken at different time points to analyze bone mineral density of connective bone sections. The results showed that the \u201cdouble up\u201d (DU) model was the most efficient for reconstructing a mandibular body and ramus defect by comparing the mechanical distribution of three sections under vertical and inclined loading conditions of 100\u2009N. The stiffness detection showed that stiffness in the DU and \u201cdouble down\u201d (DD) models was higher compared with the \u201csingle up\u201d (SU), \u201csingle down\u201d (SD), and \u201cdistraction osteogenesis\u201d (DO) models. We used the DU model for the surgery, and postoperative follow\u2010up CBCT showed that bone mineral density of each fibular connective section increased gradually with time, plateauing at 12 weeks. We conclude that a free vascularized fibula flap of the DU type was the best approach for the reconstruction of the mandibular body and ramus defect. Preoperative finite element analysis and stiffness testing were shown to be very useful for maxillofacial reconstruction.<\/jats:p>","DOI":"10.1155\/2020\/8797493","type":"journal-article","created":{"date-parts":[[2020,3,13]],"date-time":"2020-03-13T23:31:44Z","timestamp":1584142304000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Biomechanical Analysis of Various Reconstructive Methods for the Mandibular Body and Ramus Defect Using a Free Vascularized Fibula 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