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Influence of Photoinitiator and Light-Curing Source on Bond Strength of Experimental Resin Cements to Dentin

Abstract This study evaluated the bond strength (BS) of experimental resin cements formulated with different photoinitiators when activated by two kinds of light-curing units (LCUs) through a ceramic material. Seven resin blends with different camphorquinone (CQ) and/or phenylpropanedione (PPD) conc...

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Published in:Brazilian dental journal 2016-01, Vol.27 (1), p.83-89
Main Authors: Segreto, Dario Raimundo, Naufel, Fabiana Scarparo, Brandt, William Cunha, Guiraldo, Ricardo Danil, Correr-Sobrinho, Lourenço, Sinhoreti, Mário Alexandre Coelho
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container_title Brazilian dental journal
container_volume 27
creator Segreto, Dario Raimundo
Naufel, Fabiana Scarparo
Brandt, William Cunha
Guiraldo, Ricardo Danil
Correr-Sobrinho, Lourenço
Sinhoreti, Mário Alexandre Coelho
description Abstract This study evaluated the bond strength (BS) of experimental resin cements formulated with different photoinitiators when activated by two kinds of light-curing units (LCUs) through a ceramic material. Seven resin blends with different camphorquinone (CQ) and/or phenylpropanedione (PPD) concentrations (weight) were prepared: C5: 0.5% CQ; C8: 0.8% CQ; P5: 0.5% PPD; P8: 0.8% PPD; C1P4: 0.1% CQ and 0.4% PPD; C4P1: 0.4% CQ and 0.1% PPD; C4P4: 0.4% CQ and 0.4% PPD. Two LCUs were used: one quartz-tungsten-halogen (QTH - 850 mW/cm²) and one light-emitting diode (LED - 1300 mW/cm²). The microtensile bond strength of each blend was assessed. Data were submitted to two-way ANOVA and Tukey's test (α=0.05). The BS values did not exhibit significant differences for LCUs, regardless of the photoinitiator type. Three cements showed significant differences: P5 and C5 had higher BS with QTH, and C4P1 with LED. For QTH, P5 showed the highest and C1P4 the lowest BS. For the LED, C4P1 showed the highest BS of all the cements. The results indicated that PPD was a viable alternative in the formulation of photocured resin cements, reducing or eliminating CQ that is yellowish without impairing the bond strength. Furthermore, both LED and QTH were effective in curing resin cements that contain PPD or CQ. Resumo Este estudo avaliou a resistência de união (BS) de cimentos resinosos experimentais formulados com diferentes fotoiniciadores, quando ativados através de cerâmica, por dois tipos de fontes luminosas (LCUs). Foram preparadas sete formulações com diferentes concentrações em peso (wt) de canforquinona (CQ) e/ou fenilpropanodiona (PPD): C5: 0,5%CQ; C8: 0,8%CQ; P5: 0,5%PPD; P8: 0,8%PPD; C1P4: 0,1%CQ e 0.4%PPD; C4P1: 0,4%CQ e 0,1%PPD; C4P4: 0,4%CQ e 0,4%PPD. Duas LCUs foram usadas: uma com luz halógena (QTH - 850 mW/cm²) e uma com diodo emissor de luz (LED - 1300 mW/cm²). A BS foi avaliada por teste de microtração. Os dados foram submetidos a ANOVA a dois fatores e Teste de Tukey (α=0,05). Isolando o tipo de fotoiniciador, não houve diferenças significativas na BS. Três cimentos mostraram diferenças significativas: a BS foi maior para P5 e C5 com QTH; e para C4P1 com LED. Para a QTH, P5 exibiu a maior e C1P4 a menor BS. Para LED, C4P1 exibiu a maior BS de todos os outros cimentos testados. Conclusão: PPD é altamente viável em formulações de cimentos resinosos fotopolimerizáveis, reduzindo ou eliminando a CQ que é amarelada, sem comprometer a resistência de união. Além dis
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Seven resin blends with different camphorquinone (CQ) and/or phenylpropanedione (PPD) concentrations (weight) were prepared: C5: 0.5% CQ; C8: 0.8% CQ; P5: 0.5% PPD; P8: 0.8% PPD; C1P4: 0.1% CQ and 0.4% PPD; C4P1: 0.4% CQ and 0.1% PPD; C4P4: 0.4% CQ and 0.4% PPD. Two LCUs were used: one quartz-tungsten-halogen (QTH - 850 mW/cm²) and one light-emitting diode (LED - 1300 mW/cm²). The microtensile bond strength of each blend was assessed. Data were submitted to two-way ANOVA and Tukey's test (α=0.05). The BS values did not exhibit significant differences for LCUs, regardless of the photoinitiator type. Three cements showed significant differences: P5 and C5 had higher BS with QTH, and C4P1 with LED. For QTH, P5 showed the highest and C1P4 the lowest BS. For the LED, C4P1 showed the highest BS of all the cements. The results indicated that PPD was a viable alternative in the formulation of photocured resin cements, reducing or eliminating CQ that is yellowish without impairing the bond strength. Furthermore, both LED and QTH were effective in curing resin cements that contain PPD or CQ. Resumo Este estudo avaliou a resistência de união (BS) de cimentos resinosos experimentais formulados com diferentes fotoiniciadores, quando ativados através de cerâmica, por dois tipos de fontes luminosas (LCUs). Foram preparadas sete formulações com diferentes concentrações em peso (wt) de canforquinona (CQ) e/ou fenilpropanodiona (PPD): C5: 0,5%CQ; C8: 0,8%CQ; P5: 0,5%PPD; P8: 0,8%PPD; C1P4: 0,1%CQ e 0.4%PPD; C4P1: 0,4%CQ e 0,1%PPD; C4P4: 0,4%CQ e 0,4%PPD. Duas LCUs foram usadas: uma com luz halógena (QTH - 850 mW/cm²) e uma com diodo emissor de luz (LED - 1300 mW/cm²). A BS foi avaliada por teste de microtração. Os dados foram submetidos a ANOVA a dois fatores e Teste de Tukey (α=0,05). Isolando o tipo de fotoiniciador, não houve diferenças significativas na BS. Três cimentos mostraram diferenças significativas: a BS foi maior para P5 e C5 com QTH; e para C4P1 com LED. Para a QTH, P5 exibiu a maior e C1P4 a menor BS. Para LED, C4P1 exibiu a maior BS de todos os outros cimentos testados. Conclusão: PPD é altamente viável em formulações de cimentos resinosos fotopolimerizáveis, reduzindo ou eliminando a CQ que é amarelada, sem comprometer a resistência de união. 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Seven resin blends with different camphorquinone (CQ) and/or phenylpropanedione (PPD) concentrations (weight) were prepared: C5: 0.5% CQ; C8: 0.8% CQ; P5: 0.5% PPD; P8: 0.8% PPD; C1P4: 0.1% CQ and 0.4% PPD; C4P1: 0.4% CQ and 0.1% PPD; C4P4: 0.4% CQ and 0.4% PPD. Two LCUs were used: one quartz-tungsten-halogen (QTH - 850 mW/cm²) and one light-emitting diode (LED - 1300 mW/cm²). The microtensile bond strength of each blend was assessed. Data were submitted to two-way ANOVA and Tukey's test (α=0.05). The BS values did not exhibit significant differences for LCUs, regardless of the photoinitiator type. Three cements showed significant differences: P5 and C5 had higher BS with QTH, and C4P1 with LED. For QTH, P5 showed the highest and C1P4 the lowest BS. For the LED, C4P1 showed the highest BS of all the cements. The results indicated that PPD was a viable alternative in the formulation of photocured resin cements, reducing or eliminating CQ that is yellowish without impairing the bond strength. Furthermore, both LED and QTH were effective in curing resin cements that contain PPD or CQ. Resumo Este estudo avaliou a resistência de união (BS) de cimentos resinosos experimentais formulados com diferentes fotoiniciadores, quando ativados através de cerâmica, por dois tipos de fontes luminosas (LCUs). Foram preparadas sete formulações com diferentes concentrações em peso (wt) de canforquinona (CQ) e/ou fenilpropanodiona (PPD): C5: 0,5%CQ; C8: 0,8%CQ; P5: 0,5%PPD; P8: 0,8%PPD; C1P4: 0,1%CQ e 0.4%PPD; C4P1: 0,4%CQ e 0,1%PPD; C4P4: 0,4%CQ e 0,4%PPD. Duas LCUs foram usadas: uma com luz halógena (QTH - 850 mW/cm²) e uma com diodo emissor de luz (LED - 1300 mW/cm²). A BS foi avaliada por teste de microtração. Os dados foram submetidos a ANOVA a dois fatores e Teste de Tukey (α=0,05). Isolando o tipo de fotoiniciador, não houve diferenças significativas na BS. Três cimentos mostraram diferenças significativas: a BS foi maior para P5 e C5 com QTH; e para C4P1 com LED. Para a QTH, P5 exibiu a maior e C1P4 a menor BS. Para LED, C4P1 exibiu a maior BS de todos os outros cimentos testados. Conclusão: PPD é altamente viável em formulações de cimentos resinosos fotopolimerizáveis, reduzindo ou eliminando a CQ que é amarelada, sem comprometer a resistência de união. 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Seven resin blends with different camphorquinone (CQ) and/or phenylpropanedione (PPD) concentrations (weight) were prepared: C5: 0.5% CQ; C8: 0.8% CQ; P5: 0.5% PPD; P8: 0.8% PPD; C1P4: 0.1% CQ and 0.4% PPD; C4P1: 0.4% CQ and 0.1% PPD; C4P4: 0.4% CQ and 0.4% PPD. Two LCUs were used: one quartz-tungsten-halogen (QTH - 850 mW/cm²) and one light-emitting diode (LED - 1300 mW/cm²). The microtensile bond strength of each blend was assessed. Data were submitted to two-way ANOVA and Tukey's test (α=0.05). The BS values did not exhibit significant differences for LCUs, regardless of the photoinitiator type. Three cements showed significant differences: P5 and C5 had higher BS with QTH, and C4P1 with LED. For QTH, P5 showed the highest and C1P4 the lowest BS. For the LED, C4P1 showed the highest BS of all the cements. The results indicated that PPD was a viable alternative in the formulation of photocured resin cements, reducing or eliminating CQ that is yellowish without impairing the bond strength. Furthermore, both LED and QTH were effective in curing resin cements that contain PPD or CQ. Resumo Este estudo avaliou a resistência de união (BS) de cimentos resinosos experimentais formulados com diferentes fotoiniciadores, quando ativados através de cerâmica, por dois tipos de fontes luminosas (LCUs). Foram preparadas sete formulações com diferentes concentrações em peso (wt) de canforquinona (CQ) e/ou fenilpropanodiona (PPD): C5: 0,5%CQ; C8: 0,8%CQ; P5: 0,5%PPD; P8: 0,8%PPD; C1P4: 0,1%CQ e 0.4%PPD; C4P1: 0,4%CQ e 0,1%PPD; C4P4: 0,4%CQ e 0,4%PPD. Duas LCUs foram usadas: uma com luz halógena (QTH - 850 mW/cm²) e uma com diodo emissor de luz (LED - 1300 mW/cm²). A BS foi avaliada por teste de microtração. Os dados foram submetidos a ANOVA a dois fatores e Teste de Tukey (α=0,05). Isolando o tipo de fotoiniciador, não houve diferenças significativas na BS. Três cimentos mostraram diferenças significativas: a BS foi maior para P5 e C5 com QTH; e para C4P1 com LED. Para a QTH, P5 exibiu a maior e C1P4 a menor BS. Para LED, C4P1 exibiu a maior BS de todos os outros cimentos testados. Conclusão: PPD é altamente viável em formulações de cimentos resinosos fotopolimerizáveis, reduzindo ou eliminando a CQ que é amarelada, sem comprometer a resistência de união. Além disso, tanto LED quanto QTH são efetivas para polimerizar os cimentos contendo PPD ou CQ.</abstract><doi>10.1590/0103-6440201600387</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record>
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title Influence of Photoinitiator and Light-Curing Source on Bond Strength of Experimental Resin Cements to Dentin
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