Comparative evaluation of different fixation techniques of the sagittal split ramus osteotomy in 10 mm advancements: Mechanical testing and screw insertion torque.
J Craniomaxillofac Surg
; 46(12): 2082-2087, 2018 Dec.
Article
em En
| MEDLINE
| ID: mdl-30322777
ABSTRACT
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 ANDMETHODS:
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.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Parafusos Ósseos
/
Técnicas de Fixação da Arcada Osseodentária
/
Osteotomia Sagital do Ramo Mandibular
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
J Craniomaxillofac Surg
Ano de publicação:
2018
Tipo de documento:
Article