BIOMECHANICAL ANALYSIS USING FINITE ELEMENT ANALYSIS OF DIFFERENT FIXATION METHODS IN TWO TYPES OF SAGITTAL SPLIT RAMUS OSTEOTOMY (SSRO)
Orthognathic Surgery; Mandible; Finite Element Analysis.
Introduction: Orthognathic surgery has increasingly incorporated less invasive approaches with reduced intraoral access. In the context of mandibular osteotomies, the sagittal split ramus osteotomy (SSRO) remains the most widely used technique, for which several variations in design and plate and screw arrangements are described. Thus, with the adoption of less invasive techniques, the use of a single plate to stabilize bone segments has become increasingly common. Therefore, it is necessary to build scientific evidence regarding the mechanical behavior of these new osteosynthesis devices created specifically for this type of approach. Objective: To verify the biomechanical behavior of different fixation methods when used in two types of SSRO. Methodology: The study will simulate eight surgical combinations using finite element software. Three different types of bone fixation will be used in two types of SSRO, with different mandibular advancements, to evaluate the biomechanical behavior of the plates and screws after loading. Expected Results: All fixation types are expected to show positive similarity in biomechanical behavior for 5mm advancements in the different SSRO types; for 10mm advancements, differences are expected between the groups.