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. 2012 Jan;6(1):87-94.

Effect of cavity preparation techniques and different preheating procedures on microleakage of class V resin restorations

Emine Sirin Karaarslan  1 , Aslihan Usumez, Bora Ozturk, Mehmet Ata Cebe
Affiliations

Effect of cavity preparation techniques and different preheating procedures on microleakage of class V resin restorations

Emine Sirin Karaarslan et al. Eur J Dent. 2012 Jan.

Abstract

Objectives: This study aimed to evaluate the extent of microleakage of a single type of composite resin (Clearfil Majesty Posterior, Kuraray, Osaka, Japan) following different preheating procedures in Class V cavities prepared with a diamond bur or Er:YAG (erbium: yttrium aluminum garnet) laser.

Methods: The study randomly divided 72 permanent molar teeth divided into eight groups (n = 9): G1: Diamond bur-unheated composite resin (room temperature-24 ºC); G2: Diamond bur-composite preheated to 37 ºC; G3: Diamond bur-composite preheated to 54 ºC; G4: Diamond bur-composite preheated to 68 ºC; G5: Er:YAG laser-unheated composite resin (room temperature-24 ºC); G6: Er:YAG laser-composite preheated to 37 ºC; G7: Er:YAG laser-composite preheated to 54 ºC; and G8: Er:YAG laser-composite preheated to 68 ºC. The specimens were subjected to a thermal cycling regimen of 5000 cycles between 5 and 55 ºC; then they were immersed in a solution of 0.5% basic fuchsin dye for 24 hours. The dyed specimens were sectioned in the buccolingual direction and dye penetration was scored in a blinded manner using a five-point qualitative scale. Microleakage scores were analyzed with the Kruskall-Wallis, Mann-Whitney U, and Wilcoxon tests.

Results: There were no statistically significant differences between the microleakages of composite applied to cavities prepared by either the Er:YAG laser or diamond bur (P>.05). Statistical analysis revealed significant differences between the enamel and dentin in all restorations (P<.001). However, there were no significant differences among the preheated groups (P>.05).

Conclusions: For all groups, microleakage values were higher at gingival margins than at occlusal margins. The use of the Er:YAG laser at different preheating procedures did not influence the marginal sealing in Class V composite resin restorations.

Keywords: Er:YAG laser; microleakage; preheated composite resin.

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Figures

Figure 1.
Figure 1.
Degree of penetration between restoration and tooth.
Figure 2.
Figure 2.
Stereomicroscopic image of cavity prepared with bur.
Figure 3.
Figure 3.
Stereomicroscopic image of cavity prepared with laser.
See this image and copyright information in PMC

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