Influência da adição de carga inorgânica aos sistemas adesivos dentinários na microinfiltração marginal

Kellyn Roberta Ayumi Yoshida, Carlos Rocha Gomes Torres

Abstract



O objetivo deste estudo foi avaliar os efeitos da adição de carga inorgânica aos adesivos
dentinários sobre a microinfiltração marginal. Para tal, oitenta incisivos bovinos receberam
preparos classe V na junção amelo-cementária e foram divididos em oito grupos, cada qual
recebendo versões com e sem carga de diferentes sistemas adesivos, segundo as recomendações
dos fabricantes. Os seguintes Grupos foram avaliados: OS – One Step (Sem Carga – SC),
OSP – One Step Plus (Com Carga – CC), PB – Prime & Bond 2.1 (SC), PBNT – Prime & Bond NT
(CC), ST – Stae (SC), STM – Stae + 10% de partículas SiO2 com tamanho de 0,01 μm (CC), SB
– Single Bond (SC), SBC – Single Bond 10% de partículas SiO2 com tamanho de 0,01 μm (CC).
As cavidades foram restauradas com dois incrementos de Z250. Os dentes foram imersos em
água destilada a 37ºC por 24 horas e submetidos a 500 ciclos térmicos (5 e 55ºC). A microinfiltração
foi avaliada quantitativamente pelo método do nitrato de prata seguido pela diafanização.
Os dados foram submetidos à ANOVA paramétrica a um fator e ao teste de Tukey (a = 5%),
obtendo-se um valor de p = 0,00. As médias (± desvio padrão) observadas para cada Grupo
foram: SB: 1,07 (± 0,20)a; OS: 1,25 (± 0,49)ab; OSP: 1,64 (± 0,59)ab; SBC: 1,69 (± 1,07)ab;
PBNT: 2,21 (± 0,98)ab; PB: 2,60 (± 1,45)bc; ST: 3,70 (± 1,29)c; STC: 3,86 (± 1,11)c. Os
Grupos acompanhados das mesmas letras não apresentam diferenças significantes. Podemos
concluir que a adição de partículas de carga não influenciou de forma significativa a
microinfiltração marginal. Foram constatadas diferenças significativas entre os sistemas adesivos
de diferentes marcas.

UNITERMOS: dentina; infiltração dentária; adesivos dentinários.

SUMMARY

The aim of this study was to evaluate the effects of the addition of inorganic filler to the
dentin adhesives on the marginal microleakage. For such, eighty incisives bovine received
class V preparations in the cemento-enamel junction and they were divided in eight groups,
each one receiving versions with and without filler of different adhesive systems, according
to the manufacturers’ instructions. The following Groups were evaluated: OS – One Step
(Without Filler – WOF), OSP – One Step Plus (With Filler – WF), PB – Prime & Bond 2.1 (WOF),
PBNT – Prime & Bond NT (WF), ST – Stae (WOF), STM – Stae + 10% of SiO2 particles with
size of 0,01 μm (WF), SB – Single Bond (WOF), SBC – Single Bond +10% of SiO2 particles with
size of 0,01 μm (WF). The cavities were restored with two increments of Z250. The teeth were
immersed in distilled water at 37ºC by 24 hours and submitted to 500 thermal cycles (5 and
55ºC). The microleakage was evaluated quantitatively by the method of the silver nitrate
following by clearing. The data were submitted to parametric one-way ANOVA and Tukey’s test (a = 5%), being obtained a value of p = 0,00. The means (± standard deviation) observed
for each Group were: SB: 1,07 (± 0,20)a; OS: 1,25 (± 0,49)ab; OSP: 1,64 (± 0,59)ab;
SBC: 1,69 (± 1,07)ab; PBNT: 2,21 (± 0,98)ab; PB: 2,60 (± 1,45)bc; ST: 3,70 (± 1,29)c;
STC: 3,86 (± 1,11)c. The groups accompanied of the same letters don’t present significant
differences. We can conclude that the addition of filler particles didn’t influenced in a
significant way the marginal microleakage. Significant differences were verified among the
different adhesive systems.

UNITERMS: dentin; dental leakage; dentin-bonding agents.

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e-ISSN: 1980-6523

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