Comparison of stability of resorbable and titanium fixation systems by finite element analysis after maxillary advancement surgery

J Craniofac Surg. 2009 May;20(3):775-9. doi: 10.1097/scs.0b013e3181a2d871.

Abstract

In this study, three-dimensional modeling and finite element analysis were used to evaluate and compare the stability of Le Fort I osteotomy fixed with titanium and resorbable fixation systems under molar and incisor bite forces. A three-dimensional model of 5-mm advanced hemimaxilla was generated. Contact analyses between the upper and lower segments were prescribed. Two L-plates were inserted on this model via simulation. Displacement, principal stresses, and principal elastic strains were evaluated under 44-N, 125-N incisor and, 250-N molar bite forces. These results suggest that Le Fort I osteotomies fixed with titanium miniplates and screws were stable under all tested forces. However, in resorbable group, under incisor bite forces greater than 44 N, there is a great risk of plate fracture, screw deformation, and/or failure.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Absorbable Implants*
  • Adult
  • Biocompatible Materials*
  • Bite Force
  • Bone Plates
  • Bone Screws
  • Cadaver
  • Computer Simulation
  • Computer-Aided Design
  • Elastic Modulus
  • Equipment Failure
  • Finite Element Analysis*
  • Humans
  • Imaging, Three-Dimensional
  • Incisor / physiology
  • Maxilla / surgery*
  • Models, Anatomic
  • Models, Biological
  • Molar / physiology
  • Orthopedic Fixation Devices*
  • Osteotomy, Le Fort / instrumentation*
  • Stress, Mechanical
  • Titanium*

Substances

  • Biocompatible Materials
  • Titanium