Vol. 11, Issue 10, Part D (2025)

Magnesium alloy has recently been the subject of fracture fixation studies ^{[1, 2]}. The Young’s modulus (42 GPa) of magnesium alloy is closer to the natural bone than titanium alloy (96 GPa), thus can reduce the stress shielding effect. As Mg alloys are biodegradable, there is no need for secondary surgery to remove the implant¹. Compared with titanium plates, Mg plates have two times weak Young’s modulus and five times weak strength. This study aimed to evaluate the mechanical behavior of the straight Mg alloy plates and mandible used for the treatment of various mandibular fractures (symphysis, parasymphysis and angle) using finite element method. The analyzed parameters are the average stress value at the critical section of the plate and the gap displacement of the fragments at the fracture surface.The results of the study confirm the clinical applicability of the straight magnesium alloy plate through the displacement of the fracture fragments and the stress distribution in the mandible and plate.