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Previous issue date: 2018-01-17 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / (Artigo Os adesivos universais s?o t?o eficientes quanto um primer para a
ades?o ? zirc?nia?)
O objetivo do trabalho foi comparar a resist?ncia de uni?o ? cer?mica de zirc?nia de
quatro adesivos universais e um primer para zirc?nia. Setenta e cinco amostras de
zirc?nia foram confeccionadas e inclu?das em resina acr?lica. A superf?cie das amostras
foi polida com lixas de carbeto de sil?cio nas granula??es 600, 800 e 1.200 e jateadas
com ?xido de alum?nio 50 ?m por 5 s. As amostras foram divididas aleatoriamente em
cinco grupos (n=15): G1 ? Single Bond Universal (SBU); G2 ? All Bond Universal
(ABU); G3 ? Peak Universal Bond (PUB); G4 ? Ambar Universal (AU) e G5 ? Z-Prime
Plus (ZP). Um cone de resina composta foi constru?do, atrav?s de uma matriz, sobre o
material adesivo aplicado na superf?cie das amostras. Os corpos de prova foram
armazenados em ?gua destilada a 37?C por 24 h, sendo submetidos ao teste de
resist?ncia de uni?o ? tra??o em m?quina de ensaio universal EMIC com velocidade de
0,5 mm/min. Os tipos de falhas foram classificados em adesiva, coesiva ou mista. Os
valores de resist?ncia de uni?o foram submetidos ? an?lise de vari?ncia (ANOVA),
seguido do teste de Tukey (?=0,05). M?dias de resist?ncia de uni?o (MPa) seguidas de
letras distintas diferem estatisticamente entre si: G5=21,12a, G1=20,55a, G4=19,12ab,
G2=14,22b, G3=8,45c. As falhas foram predominantemente mistas no G1, G4 e G5, e
predominantemente adesivas no G2 e G3. Os adesivos SBU e AU obtiveram resist?ncia
de uni?o compar?vel ao ZP. / (Artigo Bond to zirconia ceramic: evaluation of different primers and a universal adhesive)
The aim of the study was to evaluate the effect of a universal adhesive and different
primers on the bond strength to zirconia ceramic. Seventy-five zirconia ceramic samples
were obtained and divided into five groups (n=15): G1 ? Scothbond Universal (SBU);
G2 ? silane + SBU; G3 - Signum Zirconia Bond; G4 - Z-Prime Plus; G5 - MZ Primer.
A cone of composite resin was built. The specimens were stored in 100% relative
humidity with distilled water at 37?C for 48 h, and then submitted to a tensile bond
strength test in a universal testing machine at a crosshead speed of 0.5 mm/min. The
type of failure that occurred during the debonding procedure was analyzed. The mean
results of the bond strength test (MPa) followed by the same letter represent no
statistical difference by ANOVA and Tukey?s post-hoc test (p<0.05): G2=27.55a
(?6.99), G4=23.71a (?5.65), G1=22.64a (?5.67), G5=13.64b (?5.49), G3=7.54c (?4.75).
G2 and G4 exhibited predominantly cohesive failure in the resin composite cone. G1
and G5 had predominantly mixed failures, and G3 exhibited only adhesive failures. The
SBU and Z-Prime Plus provided higher bond strength to zirconia ceramic. / (Artigo Os adesivos universais s?o t?o eficientes quanto um primer para a
ades?o ? zirc?nia?)
The aim of the study was to compare four universal adhesives and a primer on the bond
strength to zirconia ceramic. Seventy-five zirconia ceramic samples were obtained and
embedded in acrylic resin. The surface of the samples was polished with 600-, 800- and
1200-grit silicon carbide abrasive papers, and sandblasted with 50 ?m aluminum oxide
particles for 5 s. The samples were divided into five groups (n=15): Single Bond
Universal (SBU); G2 ? All Bond Universal (ABU); G3 ? Peak Universal Bond (PUB);
G4 ? Ambar Universal (AU) e G5 ? Z-Prime Plus (ZP). A cone of composite resin was
built on the adhesives and primer applied. The specimens were stored in distilled water
at 37oC for 24 h, and then submitted to a tensile bond strength test in a universal testing
machine at a crosshead speed of 0.5 mm/min. The type of failure that occurred during
the debonding procedure was classified as adhesive, cohesive or mixed. The values of
bond strength were analyzed by analysis of variance (ANOVA) followed by Tukey?s
test (?=0.05). Means of bond strength (MPa) followed by the distinct letters represent
statistical difference: G5=21,12a, G1=20,55a, G4=19,12ab, G2=14,22b, G3=8,45c. The
failures were predominantly mixed in G1, G4 and G5, and predominantly adhesive in
G2 and G3. SBU and AU adhesives obtained bond strength comparable to ZP.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/8121 |
| Date | 17 January 2018 |
| Creators | Lopes, Raquel de Oliveira |
| 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, Escola de Ci?ncias da Sa?de |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| 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, 500, 600, -2070498469879244349, 2075167498588264571 |
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