Udupikrishna Joshi1, Manju Kurakar1. 1. Department of Oral and Maxillofacial Surgery, S. Nijalingappa Institute of Dental Sciences, Sedam Road, Gulbarga, 585105 Karnataka India.
Abstract
AIM: To compare the displacement gap of mandible fracture segments treated with different designs of mini-plates under various loading conditions. MATERIALS AND METHODS: Fracture in the body of mandible was bridged with 15 different designs and configuration of titanium mini-plates. Bite forces were applied at 3 locations, ipsilateral fractured side, contra lateral side and incisor site. 3D finite element methods (FEM) model of mandible was generated using 10 nodal tetrahedral elements. A commercial FE solver was used to solve bone inter fragmentary displacement during loading. RESULTS: Superior position of mini-plates produced better stability than inferior position. Positive bending moments can be reduced by larger plate in lower border in 2 plate system. Results of X mini-plate are comparable to 2 plate configuration. If length of middle portion of plate increased, stability decreased. Number of screws did not affect fracture stability. CONCLUSION: Finite element methods analysis is used to determine the gap between mandible fragments which is otherwise impossible to measure clinically. The results obtained from this study offered us a choice of mini-plate design and configuration for clinical application.
AIM: To compare the displacement gap of mandible fracture segments treated with different designs of mini-plates under various loading conditions. MATERIALS AND METHODS:Fracture in the body of mandible was bridged with 15 different designs and configuration of titanium mini-plates. Bite forces were applied at 3 locations, ipsilateral fractured side, contra lateral side and incisor site. 3D finite element methods (FEM) model of mandible was generated using 10 nodal tetrahedral elements. A commercial FE solver was used to solve bone inter fragmentary displacement during loading. RESULTS: Superior position of mini-plates produced better stability than inferior position. Positive bending moments can be reduced by larger plate in lower border in 2 plate system. Results of X mini-plate are comparable to 2 plate configuration. If length of middle portion of plate increased, stability decreased. Number of screws did not affect fracture stability. CONCLUSION: Finite element methods analysis is used to determine the gap between mandible fragments which is otherwise impossible to measure clinically. The results obtained from this study offered us a choice of mini-plate design and configuration for clinical application.
Entities:
Keywords:
Body of mandible fracture; Finite element method analysis; Osseointegration; Rigid fixation; Titanium mini-plates