In silico analysis of the biomechanical stability of commercially pure Ti and Ti-15Mo plates for the treatment of mandibular angle fracture

Publication date: Available online 4 January 2017
Source:Journal of Oral and Maxillofacial Surgery
Author(s): Satoshi Yamaguchi, Rodolfo B. Anchieta, Fernando PS. Guastaldi, Nick Tovar, Daisuke Tawara, Satoshi Imazato, Paulo G. Coelho
PurposeTo investigate the influence of different materials and fixation methods on maximum principal stress and displacement in reconstruction plates using in silico three-dimensional finite element analysis (3D-FEA).MethodsCAD models of the mandible and teeth were constructed. CHAMPY and AO/ASIF plates and fixation screws were designed with CAD software. 3D-FEA was performed by image-based CAE software. Maximum and minimum values of biomechanical stability, maximum principal stress and displacement distribution were compared in CHAMPY and AO/ASIF plates made from commercially pure titanium grade 2 (cp-Ti) and titanium-molybdenum (14.47%wt) alloy (Ti-15Mo).ResultsFor plates fixed on a fractured left angle of mandible model, the maximum/minimum values of MPS in the cp-Ti-constructed CHAMPY plate, upper AO/ASIF plate, and lower AO/ASIF plate were 19.5/20.3, 15.2/25.3, and 21.4/4.6% lower, respectively, than for plates made from Ti-15Mo. In the same model, the maximum/minimum values of displacements in cp-Ti-constructed CHAMPY plate, upper AO/ASIF plate, and lower AO/ASIF plate were 1.6/3.8, 3.1/2.7, and 5.4/10.4% higher, respectively, than for plates made from Ti-15Mo.ConclusionThis in silico 3D-FEA demonstrates that Ti-15Mo plates have greater load-bearing capability.



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