Banca de DEFESA: BRAZ DA FONSECA NETO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : BRAZ DA FONSECA NETO
DATE: 10/11/2025
TIME: 18:30
LOCAL: SALA VIRTUAL DO MEET - NATAL
TITLE:

BIOMECHANICAL ANALYSIS USING FINITE ELEMENT ANALYSIS OF DIFFERENT FIXATION METHODS IN TWO TYPES OF SAGITTAL SPLIT RAMUS OSTEOTOMY (SSRO)

KEY WORDS:

Orthognathic Surgery; Mandible; Finite Element Analysis.

PAGES: 25
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUBÁREA: Cirurgia Buco-Maxilo-Facial
SUMMARY:

Orthognathic surgery has increasingly incorporated less invasive approaches with reduced intraoral access. In the context of mandibular osteotomies, sagittal split osteotomy of the mandibular ramus (SSA) remains the most widely used technique, for which several variations in design, plate, and screw arrangement have been 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 gather scientific evidence on the mechanical behavior of these new osteosynthesis devices created specifically for this type of approach. The objective of this study was to evaluate the biomechanical behavior of the MIOS plate in relation to different fixation systems applied in conventional and short osteotomy designs. To this end, an in silico computational study of finite models was performed. Three-dimensional mandibular models were subjected to OSRM simulations with 5 mm and 10 mm advancements. Different configurations of System 2.0 plates (straight, hybrid, and MIOS) were tested under a 200 N load to analyze von Mises stresses. It was observed that with increasing mandibular advancement and in short osteotomies, the stresses in the fixation systems increased. The conventional osteotomy showed better biomechanical performance, and the addition of a bicortical screw was essential to reduce mechanical overload in all configurations, while the MIOS plate with the bicortical screw presented the best results. Therefore, it was demonstrated that the fixation systems had a greater stress demand in short sagittal osteotomies and with 10 mm advancements. The configuration with the MIOS plate associated with a bicortical screw presented the most favorable mechanical behavior, proving to be a good option for short osteotomies, while the bicortical screw proved to be an essential element to guarantee stability in scenarios of greater mechanical demand.

COMMITTEE MEMBERS:
Interno - 2379951 - ADRIANO ROCHA GERMANO
Externo à Instituição - RAFAEL SEABRA LORO - UFF
Externa à Instituição - RAFAELA SCARIOT - UFPR