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CC BY-NC-ND 4.0 · Eur J Dent 2012; 06(01): 087-094
DOI: 10.1055/s-0039-1698935
Original Article
Dental Investigation Society

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

Emine Sirin Karaarslan
1   Department of Operative Dentistry, Faculty of Dentistry, Gaziantep University, Gaziantep, TURKIYE
,
Aslihan Usumez
2   Department of Prosthodontics, Faculty of Dentistry, Bezmialem Vakif University, Istanbul, TURKIYE
,
Bora Ozturk
3   Department of Operative Dentistry, Faculty of Dentistry, Selcuk University, Konya, TURKIYE
,
Mehmet Ata Cebe
1   Department of Operative Dentistry, Faculty of Dentistry, Gaziantep University, Gaziantep, TURKIYE
› Institutsangaben
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Publikationsdatum:
30. September 2019 (online)

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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. (Eur J Dent 2012;6:87-94)

Key words

Er:YAG laser - microleakage - preheated composite resin
 

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