title: Relative displacement resistance of standard and low-profile bone plates in experimental mandibular angle fractures.
abstract: OBJECTIVE
  The purpose of the study was to compare the resistance to displacement of low-profile and standard titanium bone plate with an experimental mandibular angle fracture model.
  
  
  METHODS
  A jig was used to produce standard horizontally and vertically unfavorable mandibular angle fractures in 24 healthy baboon hemimandibles. Each hemimandible was immobilized with either a standard or a low-profile titanium bone plate with a Champy unicortical technique. The resistance to displacement was measured in a tensile-testing machine, and results were analyzed with a three-way analysis of variance.
  
  
  RESULTS
  Mean (SD) forces required to displace the fractures were standard plate 68.7 (22.8) kg and low-profile plate 46.5 (24.6) kg.
  
  
  CONCLUSIONS
  The standard plates provided significantly more resistance to displacement, and 75% of the low-profile plates fractured through a screwhole.
authors.affiliation: Division of Maxillofacial and Oral Surgery, University of the Witwatersrand, Johannesburg, South Africa.
authors.forename: M
authors.initials: M
authors.lastname: Nissenbaum
authors.forename: M
authors.initials: M
authors.lastname: Lownie
authors.forename: P
authors.initials: P
authors.lastname: Cleaton-Jones
mesh_terms: D000818:Animals; D001732:Bite Force; D001860:Bone Plates; D004867:Equipment Design; D005593:Fracture Fixation, Internal / Q000295:instrumentation*; D005599:Fractures, Ununited / Q000503:physiopathology; D008337:Mandibular Fractures / Q000601:surgery*; D010215:Papio; D014025:Titanium
chemical_list: D014025:Titanium