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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/131425
Title: 
Analysis of residual stress and hardness in regions of pre-manufactured and manual bends in fixation plates for maxillary advancement
Author(s): 
Institution: 
  • Universidade Estadual Paulista (UNESP)
  • Universidade Estadual de Campinas (UNICAMP)
  • Universidade de Taubaté (UNITAU)
ISSN: 
1865-1569
Abstract: 
The aim of this study was to analyze, through Vickers hardness test and photoelasticity analysis, pre-bent areas, manually bent areas, and areas without bends of 10-mm advancement pre-bent titanium plates (Leibinger system). The work was divided into three groups: group I-region without bend, group II-region of 90° manual bend, and group III-region of 90° pre-fabricated bends. All the materials were evaluated through hardness analysis by the Vickers hardness test, stress analysis by residual images obtained in a polariscope, and photoelastic analysis by reflection during the manual bending. The data obtained from the hardness tests were statistically analyzed using ANOVA and Tukey's tests at a significance level of 5 %. The pre-bent plate (group III) showed hardness means statistically significantly higher (P < 0.05) than those of the other groups (I-region without bends, II-90° manually bent region). Through the study of photoelastic reflection, it was possible to identify that the stress gradually increased, reaching a pink color (1.81 δ / λ), as the bending was performed. A general analysis of the results showed that the bent plate region of pre-bent titanium presented the best results.
Issue Date: 
2015
Citation: 
Oral And Maxillofacial Surgery, v. 19, n. 4, p. 369-373, 2015.
Time Duration: 
369-373
Publisher: 
Springer
Keywords: 
  • Bone plates
  • Hardness testing
  • Maxillary osteotomy
Source: 
http://dx.doi.org/10.1007/s10006-015-0504-7
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/131425
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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