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| Author(s): |
Fábio Ricardo Loureiro Sato
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Piracaba, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Faculdade de Odontologia de Piracicaba |
| Defense date: | 2009-02-19 |
| Examining board members: |
Marcio de Moraes;
Cassio Edvard Sverzut;
Roger William Fernandes Moreira
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| Advisor: | Marcio de Moraes; Luciana Asprino |
| Abstract | |
The aim of this research was to evaluate the resistance and tension areas created after load incidence in four different fixation techniques used in the sagittal split ramus osteotomy (SSRO). For this research, a sample of 50 polyurethane hemimandibles replicas were submitted to linear load test, divided in 4 different fixation techniques for SSRO ( 3 linear screws 90°, 3 linear screws 60°, 3 screw in inverted "L" arrangement and 1 titanium miniplate with extension, and a control group). Other 8 hemimandibles were made in photoelastic resin and submitted to photoelastic analysis after a displacement of 3 mm. The results of the mechanical tests demonstrated that the linear 90° and the inverted "L" arrangement were the ones with higher loading resistance, followed by linear 60° screws and the miniplates. In relation to tension distribution in photoelastic analysis, the fringes were concentrated near the osteotomy and to the inferior part of the mandible in linear 90° screws and in inverted "L" arrangement. In the linear 60° screws, the fringes were in the majority near and between the screws and in the miniplates, the fringes were concentrated in the screws near the osteotomy and more distally. Based on these facts, the linear 90° and inverted "L" arrangement presents the higher mechanical resistance, mainly because of the good tension distribution to the substrate not only near the screws, as it occurs with linear 60°and miniplates with screws. (AU) | |
| FAPESP's process: | 06/54109-0 - A comparative biomechanical and photoelastic evaluation of different fixation techniques of sagital spit ramus osteotomy in mandibular advancement |
| Grantee: | Fabio Ricardo Loureiro Sato |
| Support Opportunities: | Scholarships in Brazil - Master |