Effect of different adhesive systems and laser treatment on the shear bond strength of bleached enamel


Gurgan S., Alpaslan T., Kiremitci A., Cakir F. Y., Yazici E., Gorucu J.

Journal of Dentistry, vol.37, no.7, pp.527-534, 2009 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 37 Issue: 7
  • Publication Date: 2009
  • Doi Number: 10.1016/j.jdent.2009.03.012
  • Journal Name: Journal of Dentistry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.527-534
  • Keywords: Er,Cr:YSGG laser, Bond strength, Bleaching, Adhesives, Nanohybrid composite, SELF-ETCHING PRIMER, BUR-CUT ENAMEL, COMPOSITE RESIN, BOVINE ENAMEL, HUMAN DENTIN, SURFACE, RINSE, YSGG, GEL, ER
  • Lokman Hekim University Affiliated: No

Abstract

Purpose: This study determined the shear bond strength of a nanohybrid composite resin to bleached enamel immediately or 15 days later using different adhesive systems and laser application. Methods: One hundred and forty enamel specimens were prepared from human molar teeth and bleached either with 16% carbamide peroxide (CP) or 30% CP according to the manufacturer's (Vivastyle/Vivadent) recommendations. After bleaching treatments specimens were divided into two groups according to the treatment time of the adhesive procedures: immediately or 15 days after the bleaching treatments. The four groups were then divided into five subgroups due to the surface treatments: using a two-step self-etching adhesive (AdheSe, Ivoclar Vivadent G, Schaan, Liechtenstein) or a two-step etch and rinse adhesive (Excite, Ivoclar Vivadent G, Schaan, Liechtenstein) and application of laser prior to adhesive procedures or not. After adhesive procedures nanohybrid composite resin cylinders of 4 mm × 2 mm (Tetric Evo Ceram/Vivadent) were bonded to the enamel surfaces. All specimens were subjected to shear bond strength test after thermocycling and 24 h of storage in water. Data were analyzed statistically. Results: Mann-Whitney U-test analysis showed no significant difference in the mean bond strength values of enamel bleached with either 16% CP or 30% CP (p > 0.05). There was no difference between the groups bonded immediately or 15 days after bleaching (p > 0.05). Application of the etch and rinse adhesive after 15 days showed the highest bond strength values, whereas self-etching adhesive and laser application showed the lowest values in both bleaching treatments. Conclusions: The results suggested that following the bleaching treatments, the use of etch and rinse adhesive system may provide higher bond strengths than self-etching adhesive and laser application. © 2009 Elsevier Ltd. All rights reserved.