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Previous issue date: 2014-03-26 / Aim: Evaluate, in vitro, the surface roughness of two composite resins submitted to a simulated wear test with three different dentifrices, applying simulated periods of six months, one year and two years of tooth brushing. Materials and Methods: Thirty-six samples of Z350XT and 36 samples of Empress Direct were built and randomly divided into three groups (n=12) according to the dentifrice used (Colgate Total 12 Clean Mint [CT12] (control), Colgate Sensitive Pro-Al?vio [CS], Oral B Pro-sa?de Whitening [OBW]). The samples were submitted to 5,000, 10,000 or 20,000 cycles of simulated tooth brushing. After each simulated period, the surface roughness of the samples was measured using a roughness tester. Results: According to three-way ANOVA, dentifrice (p=0.044) and period (p=0.000) were significant. There was no significance for the composite resin factor (p=0.381) and for the interaction (p>0.05). CT12 presented the lower surface roughness (0.269 μm), not differing statistically from CS (0.300 μm). The highest surface roughness was obtained for OBW (0.390 μm), not differing statistically from CS. The higher value was obtained after 20,000 cycles (0.584 μm) of simulated tooth brushing, differing statistically from the other two periods. Conclusions: Z350 XT and Empress Direct presented similar surface roughness after all cycles of simulated tooth brushing. The surface roughness of the composites increased with brushing time. The whitening toothpaste OBW caused higher surface roughness in both composite resins. / Objetivo: Avaliar, in vitro, a rugosidade superficial de duas resinas compostas submetidas ? escova??o simulada com tr?s diferentes dentifr?cios, em per?odos de seis meses, um ano e dois anos. Materiais e M?todos: Foram confeccionadas 36 amostras da resina composta Z350 XT e 36 da resina Empress Direct, sendo divididas aleatoriamente em tr?s grupos de 12 (n=12), conforme o dentifr?cio utilizado (Colgate Total 12 Clean Mint [CT12] (controle), Colgate Sensitive Pro-Al?vio [CS], Oral B Pro-Sa?de Whitening [OBW]). As amostras foram submetidas a 5.000, 10.000 e 20.000 ciclos de escova??o. Ap?s cada per?odo simulado, as amostras de resinas compostas tiveram a rugosidade de superf?cie mensurada por um rugos?metro. Resultados: Segundo a ANOVA de tr?s fatores, os fatores dentifr?cio (p=0,044) e tempo (p=0,000) foram significativos. N?o houve signific?ncia para o fator resina composta (p=0,381) e para a intera??o entre os fatores (p>0,05). O dentifr?cio CT12 apresentou a menor m?dia de rugosidade superficial (0,269 μm), n?o diferindo estatisticamente do dentifr?cio CS (0,300 μm). A maior m?dia de rugosidade superficial foi obtida com o dentifr?cio OBW (0,390 μm), n?o diferindo estatisticamente do CS. A maior m?dia de rugosidade superficial foi obtida ap?s 20.000 ciclos de escova??o (0,584 μm), diferindo estatisticamente dos outros tempos. Conclus?es: Z350 XT e Empress Direct apresentaram rugosidade superficial semelhante ap?s todos os ciclos de escova??o. A rugosidade superficial das resinas compostas aumentou com o tempo de escova??o. O dentifr?cio clareador OBW causou maior rugosidade de superf?cie em ambas as resinas compostas.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/1268 |
| Date | 26 March 2014 |
| Creators | Monteiro, Bruna |
| Contributors | Spohr, Ana Maria |
| Publisher | Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Programa de P?s-Gradua??o em Odontologia, PUCRS, BR, 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, 500, 600, 4673435736271820140 |
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