Titanium versus magnesium plates for unilateral mandibular angle fracture fixation: Biomechanical evaluation using 3-dimensional finite element analysis

摘要: ObjectivesThe aim of the study was to compare the stress distribution of magnesium alloy and titanium fracture fixation plates using 3 different designs of fixation plates (Straight plate with interval, Straight plate without interval, and Circular bar) used in simple unilateral mandibular angle fracture and to analyze the stresses acting within the screws used to stabilize the plates.MethodsFinite element models of 3 fixation screw designs (Straight plate with interval, Straight plate without interval, and Circular bar) were developed to simulate the biomechanics of mandibular fixation devices. Material properties of mandibular bone, magnesium and titanium alloy (Titanium alloys) was incorporated. Fracture lines were created on the angle of mandible and loads of 100–500 N were applied in sequence on the mandibular premolar/molar region of the normal side. Von Mises stresses and the magnitude of displacement on the …