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Previous issue date: 2016-02-29 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The aim of this study was to evaluate, in vitro, the tensile bond strength to dentin of the adhesive systems Single Bond Universal (3M), All-Bond Universal (Bisco) and One Coat 7 (Colt?ne), in the self-etch mode, taking Clearfil SE Bond as control. The middle portion of 120 bovine teeth were included in a selfcured acrylic resin and abraded in a mechanic lathe with water refrigeration in order to obtain a plane surface in dentin. The adhesives systems were applied on the dentin in accordance with the instructions of the manufacturers, followed by the application of composite resin Z250 (3M). Thirty specimens were obtained for each adhesive system. After immersion in distilled water at 37 oC for 24 hours, half of the specimens were submitted to cyclic loading using 500,000 cycles. For all specimens, the tensile bond strength was determinated in a universal testing machine (EMIC DL-2000) at a cross-head speed of 0.5 mm/minute. The results were analyzed by two-way ANOVA and Tukey?s test (? = 5%). The interaction between the factors adhesive system and cyclic loading was significant (p<0.05). The means followed by the same letter represent no statistical difference for the tensile bond strength (MPa) after 24 h: One Coat 7 = 7.86A (?2.90), Single Bond Universal = 6.78AB (?2.03), All-Bond Universal = 5.61BC (?2.32), Clearfil SE Bond = 3.53C (?1.89). After cyclic loading, the adhesive systems Clearfil SE Bond, Single Bond Universal and All-Bond Universal maintained the bond strength values comparable to 24 h period. There was a significant decrease only for One Coat 7. The adhesive system Single Bond Universal, All-Bond Universal and One Coat 7, in the self-etch mode, had bond strength to dentin comparable to Clearfil SE Bond. Only the adhesive system One Coat 7 decreased the bond strength to dentin after cyclic loading. / O objetivo deste trabalho foi avaliar, in vitro, a resist?ncia de uni?o ? tra??o sobre a dentina dos sistemas adesivos universais Single Bond Universal (3M), All-Bond Universal (Bisco) e One Coat 7 (Colt?ne), na vers?o autocondicionante, tendo o Clearfil SE Bond como controle. O ter?o m?dio da coroa de 120 dentes incisivos bovinos foi inclu?do em resina acr?lica autopolimeriz?vel e desgastado em um torno mec?nico sob refrigera??o ? ?gua para obter uma superf?cie plana em dentina. Os sistemas adesivos foram aplicados sobre a dentina de acordo com as instru??es dos fabricantes, seguido da aplica??o de resina composta Z250 (3M). Trinta corpos de prova foram confeccionados para cada sistema adesivo. Ap?s armazenagem em ?gua destilada a 37? C por 24 h, metade dos corpos de prova de cada grupo foi submetida ? 500.000 ciclos de ciclagem mec?nica. Todos os corpos de prova foram submetidos ao teste de resist?ncia de uni?o ? tra??o na m?quina de ensaio universal EMIC DL-2000 com velocidade de 0,5 mm/minuto. Os resultados foram analisados pela ANOVA de duas vias e o teste de Tukey (? =5%). Houve intera??o entre os fatores sistema adesivo e ciclagem mec?nica (p<0,05). As m?dias seguidas de mesma letra n?o diferem estatisticamente para a resist?ncia de uni?o (MPa) medida ap?s 24 h: One Coat 7 = 7,86? (?2,90), Single Bond Universal = 6,78AB (?2,03), All-Bond Universal = 5,61BC (?2,32), Clearfil SE Bond = 3,53C (?1,89). Ap?s ciclagem mec?nica, os sistemas adesivos Clearfil SE Bond, Single Bond Universal e All-Bond Universal mantiveram os valores de resist?ncia de uni?o compar?veis ao per?odo de 24 h, havendo redu??o significativa para o One Coat 7. Os sistemas adesivos Single Bond Universal, All-Bond Universal e One Coat 7, na vers?o autocondicionante, tiveram resist?ncia de uni?o ? dentina compar?vel ao sistema adesivo Clearfil SE Bond. Apenas o sistema adesivo One Coat 7 apresentou redu??o na resist?ncia de uni?o ? dentina ap?s ciclagem mec?nica.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/6799 |
| Date | 29 February 2016 |
| Creators | Costa, Daniele Morosini |
| Contributors | Spohr, Ana Maria |
| 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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