title: Effect of Er,Cr:YSGG pretreatment on bond strength of fiber posts to root canal dentin using a self-adhesive resin cement.
abstract: The weak link in the adhesive luting of fiber posts to root canal dentin is at the cement-dentin interface. The aim of the present study was to evaluate the effect of Er,Cr:YSGG laser irradiation on push-out bond strength of fiber posts cemented to root canal dentin using a self-adhesive cement. A total of 30 sound human maxillary central incisors were equally divided into two groups after root canal treatment, decoronation and preparation of the post space. Teeth of group 1 were treated with the Er,Cr:YSGG laser, and teeth of group 2 (control) received no laser treatment. After cementation of fiber posts with Maxcem self-adhesive cement, 3-mm cervical, middle and apical sections were prepared from the roots. Then a push-out test was performed using a universal testing machine at a strain rate of 0.5 mm/min. Data were analyzed using two-way ANOVA and the Bonferroni test. Statistical significance was defined as P < 0.05. There was a significant difference in the mean bond strength values between groups 1 and 2 (P = 0.001), but there were no significant differences between the various root parts (P = 0.14). In addition, the cumulative effects of dentin treatment type and various root parts were not statistically significant (P = 0.41). The mean bond strength in the laser group was significantly higher than in the control group (P = 0.001, post hoc Bonferroni test).The failure mode was evaluated under a stereomicroscope at × 20 magnification.
authors.affiliation: Department of Operative Dentistry, School of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
authors.forename: Narmin
authors.initials: N
authors.lastname: Mohammadi
authors.forename: Siavash
authors.initials: S
authors.lastname: Savadi Oskoee
authors.forename: Mehdi
authors.initials: M
authors.lastname: Abed Kahnamoui
authors.forename: Mahmoud
authors.initials: M
authors.lastname: Bahari
authors.forename: Soodabeh
authors.initials: S
authors.lastname: Kimyai
authors.forename: Sahand
authors.initials: S
authors.lastname: Rikhtegaran
mesh_terms: D000704:Analysis of Variance; D001840:Dental Bonding; D006801:Humans; D066298:In Vitro Techniques; D007180:Incisor; D054023:Lasers, Semiconductor; D011176:Post and Core Technique; D019279:Resin Cements / Q000737:chemistry*; D019553:Tooth, Nonvital
chemical_list: C515955:Maxcem; D019279:Resin Cements