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Previous issue date: 2016-11-29 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The aim of this study was to evaluate the bond strength (?TBS) of novel CAD/CAM restorative materials to different luting cements. Thirty two crowns were milled using CAD/CAM materials (Vita Mark II, Vita Suprinity, Vita Enamic and Lava Ultimate) and luted to sound and fresh cutted dentin using different cements (Relyx ARC, Relyx Unicem 2 and Relyx Ultimate). The specimens were stored in relative humidity of 100% at 37?C for 24 h and, then sectioned into sticks with water-cooled diamond blade with low-speed cutting saw. The samples (n=16) with cross-sectional areas of approximately 1 mm? were submitted to tensile bond strength test in a universal testing machine with crosshead speed of 0.5 mm/min. The samples were analyzed with SEM to determinate the failure mode. Data were analyzed using 2-way ANOVA and Tukey?s test (?=0,05). Bond strength was significantly affected by the material and interaction between them and luting cements (p=0.001). The ?TBS (MPa) values ranged from 12.17 for Vita Mark II with Relyx ARC and 32.93 for Lava Ultimate with Relyx Unicem 2. Considering overall behavior of tested materials Vita Enamic (29.39 MPa) and Lava Ultimate (28.42 MPa) obtained higher ?TBS values in comparison to Vita Mark II (14.14 MPa) and Vita Suprinity (14.55 MPa). The ?TBS values for Vita Enamic did not differ from those obtained with Lava Ultimate (p=0.845) and the same occurred with Vita Mark II and Vita Suprinity (p=0.986). There was no statistical difference between cements (p=0.176). A promising bonding performance can be achieved with the hybrid CAD/CAM restorative materials to tooth structure and to different types of luting cements after 24h of water storage. / O objetivo deste estudo foi avaliar a resist?ncia de uni?o (?TBS) dos novos materiais CAD/CAM a diferentes cimentos resinosos. Trinta e duas coroas foram usinadas utilizando materiais CAD/CAM (Vita Mark II, Vita Suprinity, Vita Enamic and Lava Ultimate) e cimentadas ? dentina h?gida, utilizando diferentes cimentos (Relyx ARC, Relyx Unicem 2 and Relyx Ultimate). As esp?cimes foram mantidas em umidade relativa de 100% a 37?C por 24 horas e ap?s seccionadas em palitos com disco diamantado em ?gua corrente. As amostras (n=16) com ?rea de aproximadamente 1 mm? foram submetidas ao teste de microtra??o atrav?s de uma m?quina universal com velocidade de carregamento de 0.5 mm/min. As amostras foram analisadas por MEV para determinar o modo de falha. Os dados foram analisados por meio do ANOVA de dois fatores e do teste Tukey (?=0,05). A resist?ncia de uni?o foi significantemente afetada pelo material e pela intera??o deste com os cimentos resinosos (p=0.001). Os valores de ?TBS variaram de 12.17 para Mark II com Relyx ARC e 32.93 para Lava Ultimate com Relyx Unicem 2. Considerando o comportamento geral dos materiais testados, Vita Enamic (29.39 Mpa) e Lava Ultimate (28.42 Mpa) obtiveram os maiores valores de ?TBS em compara??o ao Vita Mark II (13.13 MPa) e o Vita Suprinity (14.55 MPa). Os valores de ?TBS para Vita Enamic n?o diferiram estatisticamente daqueles obtidos com Lava Ultimate (p=0.845) e o mesmo ocorreu com Vita Mark II e Vita Suprinity (p=0.986). N?o houve diferen?a estat?stica entre os cimentos resinosos (p=0.176). Uma uni?o promissora pode ser alcan?ada com os materiais CAD/CAM h?bridos ? estrutura dent?ria e a diferentes cimentos resinosos ap?s 24 horas de armazenamento em ?gua.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/7197 |
| Date | 29 November 2016 |
| Creators | Bellan, Mari? Cortina |
| Contributors | Mota, Eduardo Gon?alves |
| 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 | English |
| 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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