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Updated: May 25, 2026
Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation
Published on: July 21, 2014
[Study on the microleakage between the composite resin and cavity wall after Er,Cr:YSGG laser preparation]
Xing-ya Jia1, Feng-yan Wang, Ce Liu
1Department of VIP, School of Stomatology, China Medical University, Shenyang 110002, China. jia.xing.ya@tom.com
Purpose:
To evaluate microleakage between the composite resin and cavity wall after Er,Cr:YSGG laser preparation.
Methods:
Class V cavities were prepared in 30 sound extracted human premolars. The teeth were randomly divided into 3 groups (n=10).Group 1 was treated with Er,Cr:YSGG+37% phosphoric acid, group 2 was treated with Er,Cr:YSGG+FL-BOND and group 3 was treated with Er,Cr:YSGG+17% EDTA.Then the specimens were subjected to thermocycling and staining. The marginal microleakage was assessed by dye penetration method and scanning electronic microscope(SEM). The data was analyzed with SPSS11.0 software package.
Results:
In occlusal margins,microleakage in group 2 was significantly lower than that in the other two laser groups(P<0.05).No significant difference was found between group 1 and 3 by dye penetration method.The space between the restorations and tooth structure revealed that there was significant difference between group 2 and 3(P<0.05).No significant difference was found between the other two laser groups by SEM. In gingival margins, microleakage test and the space between the restorations and tooth structure revealed that there was no significant difference among the three laser groups.There was significant difference in microleakage between the occlusal and gingival margins only in group 2(P<0.05).
Conclusions:
It is concluded that self-etch adhesive system was effective in reducing microleakage of the occlusal margins between the composite resin and the cavity wall after Er,Cr:YSGG laser preparation.There was no significant difference in microleakage after using a total etch adhesive system and EDTA.
