Comparative evaluation of different fixation techniques of the sagittal split ramus osteotomy in 10 mm advancements: Mechanical testing and screw insertion torque.

Autor: Sigua-Rodriguez EA; Piracicaba Dental School, Department of Oral Diagnosis (Head: Jose Ricardo de Albergaria-Barbosa), State University of Campinas e UNICAMP, P.O. Box 52, Piracicaba, Sao Paulo, 13414-903, Brazil; Centro de Investigaciones del Colegio Odontológico (CICO), Institución Universitaria, Colegios de Colombia, Bogotá, Colombia. Electronic address: edersiguaodont@gmail.com., de Medeiros RC; Piracicaba Dental School, Department of Oral Diagnosis (Head: Jose Ricardo de Albergaria-Barbosa), State University of Campinas e UNICAMP, P.O. Box 52, Piracicaba, Sao Paulo, 13414-903, Brazil., Goulart DR; Piracicaba Dental School, Department of Oral Diagnosis (Head: Jose Ricardo de Albergaria-Barbosa), State University of Campinas e UNICAMP, P.O. Box 52, Piracicaba, Sao Paulo, 13414-903, Brazil., Bomfim-Azevedo VL; Department of Prosthodontics and Periodontology, Piracicaba Dental School, State, University of Campinas, Piracicaba, São Paulo, Brazil., Olate S; Division of Oral and Maxillofacial Surgery, Universidad de La Frontera, Chile; Center for Biomedical Research, Universidad Autónoma de Chile, Temuco, Chile., de Albergaria-Barbosa JR; Piracicaba Dental School, Department of Oral Diagnosis (Head: Jose Ricardo de Albergaria-Barbosa), State University of Campinas e UNICAMP, P.O. Box 52, Piracicaba, Sao Paulo, 13414-903, Brazil.
Jazyk: angličtina
Zdroj: Journal of cranio-maxillo-facial surgery : official publication of the European Association for Cranio-Maxillo-Facial Surgery [J Craniomaxillofac Surg] 2018 Dec; Vol. 46 (12), pp. 2082-2087. Date of Electronic Publication: 2018 Sep 26.
DOI: 10.1016/j.jcms.2018.09.011
Abstrakt: Purpose: To compare the mechanical characteristics of five techniques for the functionally stable fixation of simulated sagittal split ramus osteotomy with 10 mm of advancement and to evaluate the screw insertion torque.
Materials and Methods: Fifty polyurethane hemimandibles with sagittal split ramus osteotomy and containing an advancement of 10 mm fixed and distributed as follows: Customized 3D Plate Group: 1 customized 3D miniplate; 4-Hole Plate Group: 2 miniplates with 4 holes; 6-Hole Plate Group: 2 miniplates with 6 holes; Hybrid Group: 1 flat miniplate with 4 holes and 1 bicortical screw; and Bicortical Screw Group: 3 bicortical screws. We conducted a mechanical test using vertical linear loading with a displacement velocity of 1 mm/min on a universal testing machine and assessed the screw insertion torque using a digital torque wrench.
Results: The means of strength for the 1-, 3- and 5-mm displacements were determined by a one-way analysis of variance (ANOVA) followed by the post hoc Tukey test. Statistically significant differences were observed only for the 5-mm displacement (F = 3.36; p = 0.01). There was a difference between the 4-H2P and HG groups (p = 0.04).
Conclusion: The customized miniplate, the fixation methods with three bicortical screws, or with two straight miniplates with either 4 or 6 holes, all offer a similar mechanical resistance suitable for fixation.
(Copyright © 2018 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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