M Nissenbaum1, M Lownie, P Cleaton-Jones. 1. Division of Maxillofacial and Oral Surgery, University of the Witwatersrand, Johannesburg, South Africa.
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. STUDY DESIGN: 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.
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. STUDY DESIGN: 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: Marco Aurélio Kenichi Yamaji; Patrício José de Oliveira Neto; Michel de Campos Ribeiro; Lucas Cavalieri Pereira; Márcio de Morais; Cássio Edvard Sverzut; Alexandre Elias Trivellato Journal: Oral Maxillofac Surg Date: 2015-03