Designing a mandibular advancement device with topology optimization for a partially edentulous patient.

Statement Of Problem: Patients with partial tooth loss treated with implant-supported fixed partial dentures (FPDs) have difficulty using conventional mandibular advancement devices (MADs) because of the risk of side effects. Also, which design factors affect biomechanical stability when designing MADs with better stability is unclear.

Purpose: The purpose of this finite element (FE) analysis study was to analyze the effect of the MAD design on biomechanical behavior and to propose a new design process for improving the stability of MADs.

Which plate results in better stability after segmental mandibular resection and fibula free flap reconstruction? Biomechanical analysis.

Objective: This study investigated the biomechanical stability of 2 plate systems-mini-plates and reconstruction plates-in reconstruction with fibular free flaps.

Study Design: The reconstruction models were constructed by using 2 types of plates in representative cases with segmental mandibular defect (C, L, LC1, LC2). In each model, a masticatory simulation approximating 3 clenching tasks was conducted, using the muscle forces adjusted to the mandible structure used in this study.

Stability of the permanently bent plates used in mandibular reconstructive surgery.

In mandibular reconstructive surgery, straight surgical plates are predominantly used for osteotomy. In this process, a straight plate is bent to fit to the shape of the patient's defect. This potentially compromises the stability of the plate because of changes in mechanical properties resulting from plastic deformation; however, the effect of plastic deformation on stability has yet been investigated.