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Dentin bond strength of adhesive system associated to Nd:YAG laser

Grant number: 11/18260-3
Support type:Regular Research Grants
Duration: March 01, 2012 - February 28, 2013
Field of knowledge:Health Sciences - Dentistry - Dental Clinics
Principal Investigator:Sérgio Eduardo de Paiva Gonçalves
Grantee:Sérgio Eduardo de Paiva Gonçalves
Home Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil


This study will evaluate the bond strength of a self-etch adhesive to dentin, associated with the Nd: YAG laser. 96 dentin surface of bovine incisors will be used, divided into six groups: a) AC - Control Clearfil SE Bond; b) AL60 - Clearfil SE Bond + Nd: YAG laser 60mJ/10Hz + photopolymerization; c) AL80 - Clearfil SE Bond + Nd: YAG laser 80mJ//10Hz + photopolymerization d) AL100 - Clearfil SE Bond + Nd: YAG laser 100mJ/10Hz + photopolymerization; e) AL120 - Clearfil SE Bond + Nd: YAG laser 120mJ/10Hz + photopolymerization f) AL140 - Clearfil SE Bond + Nd: YAG laser 140 mJ/10Hz + photopolymerization. The composite resin Z-350 will be inserted with a teflon matrix and light cured. After storage for 48 h in distilled water at 37° C, will take place sections on the teeth to obtain samples with adhesive area of 1 mm2, followed by microtensile test in a universal testing machine EMIC speed of 0.5 mm / min and cell load of 10kg. For the statistical evaluation of results will be observed if they follow a normal distribution, and from these data, we choose the most appropriate statistical test, parametric or nonparametric. The significance level is 5%. (AU)