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Previous issue date: 2014-03-26 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Proposition: The objective of this study was evaluated in vitro and in vivo the color changes of esthetic orthodontic elastomeric ligatures of different shades compared to four dyes commonly found in the diet of patients. Materials and Methods: The in vitro sample consisted of esthetic orthodontic elastomeric ligatures with were immersed during 72 hours in five different solutions: distilled water, coffee, tea, Coca-Cola and wine. The in vivo sample was evaluated in Brazilian patients, who were in orthodontic treatment, in a split-mouth model. Four elastic modules from each group were randomly distributed in the four quadrants of seven patients. The color changes of the ligatures were measured with the aid of a spectrophotometer, at T1 times - as provided by the manufacturer; T2 - after the pigmentation process. Results: The results indicated that esthetic orthodontic elastomeric ligatures are susceptible to pigmentation both in vivo and in vitro, regardless of the initial shade. Among the dyes evaluated in vitro, all changed the finished look and the color of the samples tested. In ascending order, a staining of the specimens for the following: distilled water, Coca-Cola?, black tea, wine and coffee. Conclusion: The substances that had a greater potential of pigmentation in the esthetic orthodontic elastomeric ligatures were black tea, wine and coffee, respectively. All shades of esthetic orthodontic elastomeric ligatures are susceptible to color change. / Proposi??o: O objetivo deste estudo foi avaliar in vitro e in vivo as altera??es de cor das ligaduras el?sticas est?ticas de diferentes tonalidades frente a quatro corantes comumente encontrados na dieta dos pacientes e ao meio bucal. Materiais e M?todos: A amostra in vitro foi composta por ligaduras el?sticas est?ticas as quais foram imersas durante 72 horas em cinco solu??es diferentes: ?gua destilada (grupo controle), caf?, ch?, Coca-Cola? e vinho. A amostra in vivo foi avaliada em pacientes brasileiros, que se encontravam em tratamento ortod?ntico, em um modelo de boca dividida. Quatro m?dulos el?sticos de cada grupo foram aleatoriamente distribu?dos nos quatro quadrantes de sete pacientes. As altera??es de cor das ligaduras foram mensuradas com o auxilio de um espectrofot?metro, nos tempos T1 - como fornecidas pelo fabricante; T2 - ap?s o processo de pigmenta??o. Resultados: Os resultados indicaram que as ligaduras el?sticas est?ticas s?o suscet?veis ? pigmenta??o tanto in vivo quanto in vitro, independente da tonalidade inicial. Dentre os corantes avaliados in vitro, todos alteraram o aspecto final e a cor das amostras testadas. Em ordem crescente, a colora??o dos corpos de prova foi a seguinte: ?gua destilada, Coca-Cola?, ch? preto, vinho e caf?. Conclus?o: As subst?ncias que tiveram um maior potencial de pigmenta??o nas ligaduras el?sticas est?ticas foram o ch? preto, vinho e caf?, respectivamente. Todas as tonalidades dos el?sticos est?ticos s?o suscet?veis ? altera??o de cor.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/7189 |
| Date | 26 March 2014 |
| Creators | Silva, Vanessa Dias da |
| Contributors | Lima, Eduardo Martinelli Santayana de |
| Publisher | Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Programa de P?s-Gradua??o em Odontologia, PUCRS, Brasil, Faculdade de Odontologia |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da PUC_RS, instname:Pontifícia Universidade Católica do Rio Grande do Sul, instacron:PUC_RS |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | -8096554818733665164, 600, 600, 600, 600, 4673435736271820140, -2070498469879244349, 2075167498588264571 |
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