Biomechanical in vitro evaluation of three stable internal fixation techniques used in sagittal osteotomy of the mandibular ramus: A study in sheep mandibles

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dc.contributor.authorde Olivera, Leandro Benetti
dc.contributor.authorSant'ana, Eduardo
dc.contributor.authorManzato, Antonio José [UNESP]
dc.contributor.authorGuerra, Fábio Luis Bunemer
dc.contributor.authorArnett, G. William
dc.contributor.institutionUniversidade do Sagrado Coração
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionPrivate Practice
dc.contributor.institutionMaxillofacial Surgery
dc.date.accessioned2022-04-29T08:48:58Z
dc.date.available2022-04-29T08:48:58Z
dc.date.issued2012-01-01
dc.description.abstractAmong the osteotomies performed in orthognathic surgery, the sagittal osteotomy of the mandibular ramus (SOMR) is the most common, allowing a great range of movements and stable internal fixation (SIF), therefore eliminating the need of maxillomandibular block in the postoperative period. ObjectiveS: The purpose of this study was to evaluate the biomechanical resistance of three national systems used for SIF in SOMR in sheep mandibles. Material and Methods: The study was performed in 30 sheep hemi-mandibles randomly divided into 3 experimental groups, each containing 10 hemi-mandibles. The samples were measured to avoid discrepancies and then subjected to SOMR with 5-mm advancement. In group I, 2.0x12 mm screws were used for fixation, inserted in an inverted L pattern (inverted L group). In group II, fixation was performed with two 2.0x12 mm screws, positioned in a linear pattern and a 4-hole straight miniplate and four 2.0x6.0 mm monocortical screws (hybrid group). In group III, fixation was performed with two 4-hole straight miniplates and eight 2.0x6.0 mm monocortical screws (mini plate group). All materials used for SIF were supplied by Osteosin - SIN. The hemimandibles were subjected to vertical linear load test by Kratos K2000MP mechanical testing unit for loading registration and displacement. Results: All groups showed similar resistance during mechanical test for loading and displacement, with no statistically significant differences between groups according to analysis of variance. Conclusion: These results indicate that the three techniques of fixation are equally effective for clinical fixation of SOMR.en
dc.description.affiliationUniversidade do Sagrado Coração, Bauru, SP
dc.description.affiliationBauru School of Dentistry University of São Paulo, Bauru, SP
dc.description.affiliationUniv. Estadual Paulista - UNESP, São José do Rio Preto, SP
dc.description.affiliationPrivate Practice, São José do Rio Preto, SP
dc.description.affiliationMaxillofacial Surgery, Santa Barbara, CA
dc.description.affiliationUnespUniv. Estadual Paulista - UNESP, São José do Rio Preto, SP
dc.format.extent419-426
dc.identifierhttp://dx.doi.org/10.1590/S1678-77572012000400006
dc.identifier.citationJournal of Applied Oral Science, v. 20, n. 4, p. 419-426, 2012.
dc.identifier.doi10.1590/S1678-77572012000400006
dc.identifier.issn1678-7765
dc.identifier.issn1678-7757
dc.identifier.scopus2-s2.0-84867144407
dc.identifier.urihttp://hdl.handle.net/11449/232098
dc.language.isoeng
dc.relation.ispartofJournal of Applied Oral Science
dc.sourceScopus
dc.subjectBone plates
dc.subjectBone screws
dc.subjectMandible
dc.subjectOsteotomy
dc.titleBiomechanical in vitro evaluation of three stable internal fixation techniques used in sagittal osteotomy of the mandibular ramus: A study in sheep mandiblesen
dc.typeArtigo

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