BONDING OF CONTEMPORARY ADHESIVES TO OZONE-TREATED DENTIN SURFACES

Autores

  • Khalid M. Abdelaziz
  • Ahmed Attia

DOI:

https://doi.org/10.7213/aor.v3i3.23131

Palavras-chave:

Ozone gas, Bonding to dentin, Adhesives, Composites, Bond strength.

Resumo

OBJECTIVES: To evaluate the effect of Ozone application on the shear bond strength of different types of contemporary adhesive systems to dentin. MATERIALS AND METHODS: Three of the contemporary adhesive systems representing different generations (Exite, Adper Prompt L-pop and G Bond) were used to bond standardized Tetric Ceram composite build-ups (3mm in diameter and height) either to Ozone-treated (Groups I, IV and VI) or non-treated (Groups II, V and VII) flat sound dentin surfaces. Another test group (Group III) was also existed when the Ozone was applied against etched dentin before applying the Exite single-component adhesive. Some of the prepared specimens were tested for shear bond strength and others were sectioned for SEM examination. The debonding patterns of the fractured specimens were also assessed using steromicroscope. RESULTS: Ozone treatment of dentin surfaces showed no significant effect on the bond strength of different adhesives to dentin (Tukey’s comparisons, p<0.05). The only exception was registered when the gas was applied to the already etched dentin surfaces and before the application of Exite single-component adhesive (Tukey’s comparison, p= 0.000917). The microscopic finding announced that the adhesive debonding was the most common mode of adhesive/dentin bond failure. The existence of narrow adhesive junction was observed in the SEM images of specimens bonded with G-bond. Narrow hybrid layer and short resin tags characterized the adhesive junction of specimens subjected to Ozone treatment after dentin etching and before applying the Exite adhesive. CONCLUSIONS: Ozone application seems to have no effect on the bond strength of contemporary adhesives to dentin. However, in case of using 2- step adhesives, the application of this gas should be performed before the dentin-etching step.

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Publicado

2007-11-28

Como Citar

Abdelaziz, K. M., & Attia, A. (2007). BONDING OF CONTEMPORARY ADHESIVES TO OZONE-TREATED DENTIN SURFACES. Archives of Oral Research, 3(3). https://doi.org/10.7213/aor.v3i3.23131

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