Effect of Er:YAG lasing on the dentin bonding strength of two-step adhesives.
10.5395/JKACD.2011.36.5.409
- Author:
Byeong Choon SONG
1
;
Young Gon CHO
;
Myung Seon LEE
Author Information
1. Department of Conservative Dentistry, Chosun University School of Dentistry, Gwangju, Korea. ygcho@mail.chosun.ac.kr
- Publication Type:Original Article
- Keywords:
Bonding interfaces;
Er:YAG lasing;
Microshear bond strength;
Two-step adhesives
- MeSH:
Adhesives;
Bisphenol A-Glycidyl Methacrylate;
Dentin;
Humans;
Molar;
Phosphoric Acids;
Resin Cements
- From:Journal of Korean Academy of Conservative Dentistry
2011;36(5):409-418
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
OBJECTIVES: The purpose of this study was to compare the microshear bond strength (microSBS) and bonding interfaces of two-step total-etching and self-etching adhesive systems to three etch types of dentin either the acid etched, laser etched or laser and acid etched. MATERIALS AND METHODS: The occlusal dentinal surfaces of thirty human molars were used. They were divided into six groups: group 1, 37% H3PO4 + Single Bond 2 (3M ESPE); group 2, Er:YAG laser (KEY Laser 3, KaVo) + Single Bond 2; group 3, Er:YAG laser + 37% H3PO4 + Single Bond 2; group 4, Clearfil SE Primer + Bond (Kuraray); group 5, Er:YAG laser + Clearfil SE Bond; group 6, Er:YAG laser + Clearfil SE Primer + Bond. The samples were subjected to microSBS testing 24 hr after bonding. Also scanning microscopic evaluations were made on the resin-dentin interfaces of six specimens. RESULTS: The microSBS of group 2 was significantly lower than that of groups 1 and 3 in Single Bond 2 (p < 0.05). There were significant differences among the uSBS of groups 4, 5, and 6 in Clearfil SE Bond (p < 0.05). Very short and slender resin tags were observed in groups 2 and 5. Long and slender resin tags and lateral branches of tags were observed in groups 3 and 6. CONCLUSIONS: Treatment of dentin surface using phosphoric acid or self-etching primer improved the adhesion of Er:YAG lased dentin.
