Gleysson Matias de Assis1, Victor Diniz Borborema Dos Santos1, Salomão Israel Monteiro Lourenço Queiroz1, Adriano Rocha Germano2. 1. Department of Oral and Maxillofacial Surgery, Hospital Universitário Onofre Lopes, Federal University of Rio Grande do Norte (UFRN), Natal, Av. Nilo Peçanha, 620 - Petrópolis, CEP: 59.012-300, Natal-RN, Brasil. 2. Department of Oral and Maxillofacial Surgery, Hospital Universitário Onofre Lopes, Federal University of Rio Grande do Norte (UFRN), Natal, Av. Nilo Peçanha, 620 - Petrópolis, CEP: 59.012-300, Natal-RN, Brasil. adrianogermanoufrn@yahoo.com.br.
Abstract
PURPOSE: The aim of this study was to evaluate fixation resistance in mandibular sagittal split ramus osteotomy in standardized polyurethane hemimandibles with two types of advancement (6 and 12 mm), with or without mandibular plane rotation, using a 2.0-mm plate/screw system. METHODS: Seven groups were evaluated using a vertical compressive load in the first molar region, and the applied force in Newtons was recorded in 1 mm, 5 mm, and 10 mm displacements, as well as the maximum force. RESULTS: There was a statistical intergroup difference and it was observed that increasing the advancement decreased fixation resistance with a single plate, and inserting an additional plate significantly increased osteosynthesis resistance. CONCLUSION: In the 12 mm advancements, clockwise rotation proved to be more resistant when fixed with only one plate. By contrast, counterclockwise rotation was significantly more resistant in stabilizing the mandibular sagittal ramus osteotomy when two plates were used.
PURPOSE: The aim of this study was to evaluate fixation resistance in mandibular sagittal split ramus osteotomy in standardized polyurethane hemimandibles with two types of advancement (6 and 12 mm), with or without mandibular plane rotation, using a 2.0-mm plate/screw system. METHODS: Seven groups were evaluated using a vertical compressive load in the first molar region, and the applied force in Newtons was recorded in 1 mm, 5 mm, and 10 mm displacements, as well as the maximum force. RESULTS: There was a statistical intergroup difference and it was observed that increasing the advancement decreased fixation resistance with a single plate, and inserting an additional plate significantly increased osteosynthesis resistance. CONCLUSION: In the 12 mm advancements, clockwise rotation proved to be more resistant when fixed with only one plate. By contrast, counterclockwise rotation was significantly more resistant in stabilizing the mandibular sagittal ramus osteotomy when two plates were used.
Authors: V A Pereira Filho; H Y Iamashita; M S Monnazzi; M F R Gabrielli; L G Vaz; L A Passeri Journal: Int J Oral Maxillofac Surg Date: 2012-08-13 Impact factor: 2.789
Authors: Y Oguz; E R Watanabe; J M Reis; R Spin-Neto; M A Gabrielli; V A Pereira-Filho Journal: Int J Oral Maxillofac Surg Date: 2015-04-01 Impact factor: 2.789