Effect of Er,Cr:YSGG laser on the microtensile bond strength of two different adhesives to the sound and caries-affected dentin.
OBJECTIVE
This study examined the effect of Er,Cr:YSGG laser irradiation on the microtensile bond strength (microTBS) of a three-step etch-and-rinse and a two-step self-etch adhesive to sound and caries-affected dentin.


METHODS
Sixteen freshly extracted human molars with occlusal dentin caries were used. The caries lesion was removed by one of the following methods: conventional treatment with burs or Er,Cr:YSGG laser (Waterlase MD, Biolase). The adhesive systems (AdheSE, Ivoclar Vivadent and Scotchbond Multi Purpose, 3M ESPE) were applied to the entire tooth surface according to the manufacturers' instructions. Resin composites were applied to the adhesive-treated dentin surfaces and light-cured. Each tooth was sectioned into multiple beams with the "non-trimming" version of the microtensile test. The specimens were subjected to microtensile forces (BISCO Microtensile Tester, BISCO). The data was analyzed by three-way ANOVA and independent t-tests (p=0.05).


RESULTS
Er,Cr:YSGG laser irradiation exhibited similar microTBS values compared to that of conventional bur treatment, regardless of the adhesive system and type of treated dentin. The self-etch system revealed lower microTBS values, both with conventional and laser treatment techniques, compared to the etch-and-rinse adhesive in sound and caries-affected dentin (p<0.05).


CONCLUSIONS
Er,Cr:YSGG laser irradiation did not negatively affect the bonding performance of adhesive systems to sound and caries-affected dentin.
Ergücü
Z
Z
Ege University School of Dentistry, Department of Restorative Dentistry and Endodontics, Izmir, Turkey. zergucu@yahoo.com
Celik
E U
EU
Unlü
N
N
Türkün
M
M
Ozer
F
F
D000269:Adhesives; D003188:Composite Resins; D001840:Dental Bonding; D003737:Dental Cavity Preparation; D003799:Dental Stress Analysis; D003804:Dentin / Q000528:radiation effects*; D006801:Humans; D066298:In Vitro Techniques; D053844:Lasers, Solid-State; D013718:Tensile Strength
D000269:Adhesives; D003188:Composite Resins