Influence of ErCr : YSGG laser treatment on microtensile bond strength of adhesives to enamel

Cardoso M. V., De Munck J., Coutinho E., Ermis R. B., Van Landuyt K., De Carvalho R. C. R., ...Daha Fazla

OPERATIVE DENTISTRY, cilt.33, sa.4, ss.448-455, 2008 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 33 Sayı: 4
  • Basım Tarihi: 2008
  • Doi Numarası: 10.2341/07-124
  • Dergi Adı: OPERATIVE DENTISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.448-455
  • Süleyman Demirel Üniversitesi Adresli: Evet

Özet

The current trend towards minimum-intervention dentistry has introduced laser technology as an alternative technique for cavity preparation. This study assessed the null hypothesis that enamel prepared either by ErCr:YSGG laser or conventional diamond bur is equally receptive to adhesive procedures. The buccal and lingual surfaces of 35 sound human molars were prepared with ErCr:YSGG laser or a medium-grit diamond bur. One etch&rinse (OptiBond FL) and three self-etch adhesives (Adper Prompt L-Pop, Clearfil SE Bond and Clearfil S-3 Bond) were applied on laser-irradiated and bur-cut enamel, of Z100. The micro-tensile bond strength (mu TBS) was determined after 24 hours of storage in water at 37 degrees C. Prepared enamel surfaces and failure patterns were evaluated using a stereo-microscope and a field-emission-gun scanning electron microscope (Feg-SEM). The mu TBS to laser-irradiated enamel was significantly lower than to bur-cut enamel (p < 0.05), with the exception of Clearfil S-3 Bond, which bonded equally effectively to both substrates. The latter presented the highest mu TBS on laser-irradiated enamel, though it was not statistically different from the mu TBS of OptiBond FL. SEM analysis revealed significant morphological alterations of the laser-irradiated enamel surface, such as areas of melted and recrystalized hydroxyapatite and deep extensive micro-cracks. In conclusion, the bonding effectiveness of adhesives to laser-irradiated enamel depends not only on the structural substrate alterations induced by the laser, but also on the characteristics of the adhesive employed.followed by the application of a 5-6 mm build-up