title: Evaluation of sub-surface penetration and bonding durability of self-etching primer systems to Er:YAG laser treated cervical dentin.
abstract: This study aimed to investigate self-etching bonding systems penetrating in sub-surface dentin layer after Er:YAG laser irradiation and micro-shear bonding durability over a period of 1 year. Dentin slices obtained from extracted human third molars were prepared. Two self-etching adhesive systems were evaluated: Clearfil SE Bond and Clearfil Tri-S Bond. Specimens were tested for micro-shear bond strength with one of the following treatments: Er:YAG laser irradiation and 600-grit silicon paper polishing at 24 h, 7 days, 6 months and 1 year. The adhesive interfaces between bonding agents and lased cervical dentin were studied. No hybrid layer could be observed for lased dentin. The slim resin tags could be seen penetrating through the lased subsurface layer. Bond strength to lased dentin after 6 months and 1 year were significantly decreased (p<0.05).
authors.affiliation: Shenzhen Key Laboratory of Laser Engineering, College of Optoelectronic Engineering, Shenzhen University.
authors.forename: Zhengdi
authors.initials: Z
authors.lastname: He
authors.forename: Lingling
authors.initials: L
authors.lastname: Chen
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Shimada
authors.forename: Junji
authors.initials: J
authors.lastname: Tagami
authors.forename: Shuangchen
authors.initials: S
authors.lastname: Ruan
mesh_terms: D000269:Adhesives; D001840:Dental Bonding; D003804:Dentin; D017220:Dentin-Bonding Agents; D006801:Humans; D053844:Lasers, Solid-State; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements; D013718:Tensile Strength
chemical_list: D000269:Adhesives; D017220:Dentin-Bonding Agents; D019279:Resin Cements