Document Detail

In vitro biomechanical evaluation of sagittal split osteotomy fixation with a specifically designed miniplate.
MedLine Citation:
PMID:  22898312     Owner:  NLM     Status:  Publisher    
Recent studies have evaluated many methods of internal fixation for sagittal split ramus osteotomy (SSRO), aiming to increase stability of the bone segments while minimizing condylar displacement. The purpose of this study was to evaluate, through biomechanical testing, the stability of the fixation comparing a specially designed bone plate to other two commonly used methods. Thirty hemimandibles were separated into three equal groups. All specimens received SSRO. In Group I the osteotomies were fixed with three 15mm bicortical positional screws in an inverted-L pattern with an insertion angle of 90°. In Group II, fixation was carried out with a four-hole straight plate and four 6mm monocortical screws. In Group III, fixation was performed with an adjustable sagittal plate and eight 6mm monocortical screws. Hemimandibles were submitted to vertical compressive loads, by a mechanical testing unit. Averages and standard deviations were submitted to analysis of variance using the Tukey test with a 5% level of significance. Bicortical screws presented the greatest values of loading resistance. The adjustable miniplate demonstrated 60% lower resistance compared to bicortical screws. Group II presented on average 40% less resistant to the axial loading.
V A Pereira Filho; H Y Iamashita; M S Monnazzi; M F R Gabrielli; L G Vaz; L A Passeri
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-13
Journal Detail:
Title:  International journal of oral and maxillofacial surgery     Volume:  -     ISSN:  1399-0020     ISO Abbreviation:  Int J Oral Maxillofac Surg     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-8-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8605826     Medline TA:  Int J Oral Maxillofac Surg     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.
Dental School of Araraquara, Department of Diagnosis and Oral and Maxillofacial Surgery, Universidade Estadual Paulista, Unesp, Rua Humaita, 1680, 2° andar, Araraquara, São Paulo, Cep 14801-903, Brazil.
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