Journal of Peking University(Health Sciences) ›› 2014, Vol. 46 ›› Issue (3): 474-477.

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Marginal microleakage of cavities prepared with Er:YAG laser on primary teeth  in vitro

XIE Yao1,ZHANG Sun2△,GE Li-hong2   

  1. (1.Department of Endodontic Dentistry, First Clinical Divison, Peking University School and Hospital of Stomatology, Beijing 100034, China;2.Department of Pediatric Dentistry, Peking University School and Hopstital of Stomatology, Beijing 100081,China)
  • Online:2014-06-18 Published:2014-06-18

Abstract: Objective:To investigate the marginal microleakage after cavity preparation by Er:YAG laser and conventional bur applying different adhesive systems, conditioning surface with acid etching or not. Methods: In the study, 50 primary teeth were divided into 5 groups. (1) Bur+etch-and-rinse system, (2) Bur+self-etching system, (3) Er:YAG laser+etch-and-rinse system, (4) Er:YAG laser+self-etching system, (5) Er:YAG laser+none-etched.  The class V cavities were all filled with composite resin. The microleakage tests were performed, observed and scored under stereomicroscope. Results: Bur+etchand-rinse group had higher microleakage than Er:YAG laser+etch-and-rinse group, and Bur+self-etching group had higher microleakage than Er:YAG laser+self-etching group(P<0.05). There was no difference between Er:YAG laser+etch-and-rinse group and Er:YAG laser+self-etching group, while they had significantly lower microleakage than that of Er:YAG+none-etched group. Conclusion: Composite resin restoration showed less marginal microleakage when all-in-one self-etch system was used after irradiation by Er:YAG laser on primary teeth.

Key words: Laser therapy, Dental cavity preparation, Dental microleakage, Tooth, deciduous

[1] CAI Xue, NIE Jie, WANG Zu-Hua, TIAN Hong-Yan, ZHAO Ying, WANG Xiao-Yan. Effects of different cavosurface margins on color matching of the resin composite [J]. Journal of Peking University(Health Sciences), 2015, 47(1): 120-123.
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