title: Influence of Laser Activated Irrigation with two Erbium Lasers on Bond Strength of Inidividually Formed Fiber Reinforced Composite Posts to Root Canal Dentin.
abstract: The aim of thisin vitrostudy was to investigate the effect of laser activated irrigation (LAI) using two erbium lasers on bond strength of individually formed fiber-reinforced composite (FRC) posts to root canal dentin.
  
  
  
  Twenty-seven single-rooted human teeth were endodontically treated and after post space preparation divided into three groups (n=9 per group), according to the pre-treatment of post space preparation: 1) Conventional syringe irrigation (CSI) and saline; 2) Er.YAG photon-induced photoacoustic streaming (PIPS) technique and saline; 3) Er,Cr:YSGG activated irrigation with RFT2 tip. Two specimens from each group were used for SEM analysis. The remaining specimens (n=7 per group) received individually formed FRC post, everStick POST, luted with self-adhesive cement, G-CEM LinkAce. After cementation, the roots were perpendicularly sectioned into 1 mm thin sections and a push-out test was carried out (0.5 mm/min). The data were calculated as megapascals and were log transformed and statistically analysed using one-way ANOVA at the level of significance set at 5%.
  
  
  
  In the control group, the smear layer was still present. In the Er:YAG group, the smear layer was removed. In the Er,Cr:YSGG group, the smear layer was partially removed. The Er,Cr:YSGG group achieved the highest bond strength values, followed by the control group and then the Er:YAG group, but no statistically significant difference was found in bond strength values in the tested group of post space pretreatment (p=0.564).
  
  
  
  LAI using two erbium lasers, with PIPS or RFT2 tip, did not affect the bond strength of individually formed FRC posts to root canal dentin.
authors.affiliation: - Department of Dental Medicine, Health Center for County of Dalmatia, Split, Croatia.
authors.forename: Ivana
authors.initials: I
authors.lastname: Parčina
authors.affiliation: - Department of Dental Medicine, Health Center for County of Dalmatia, Split, Croatia.
authors.lastname: Amižić
authors.affiliation: - Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Zagreb, Croatia.
authors.forename: Ivana
authors.initials: I
authors.lastname: Miletić
authors.affiliation: - Department of Biomedical, Surgical and Dental Sciences, Galeazzi Institute, University of Milan, Milan, Italy.
authors.forename: Andrei C
authors.initials: AC
authors.lastname: Ionescu
authors.affiliation: - Department of Biomedical, Surgical and Dental Sciences, Galeazzi Institute, University of Milan, Milan, Italy.
authors.forename: Eugenio
authors.initials: E
authors.lastname: Brambilla
authors.affiliation: - Department of Oral Surgery, School of Dental Medicine, University of Zagreb, Zagreb, Croatia.
authors.forename: Dragana
authors.initials: D
authors.lastname: Gabrić
authors.affiliation: - Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Zagreb, Croatia.
authors.forename: Anja
authors.initials: A
authors.lastname: Baraba
keywords: Fiberglass Reinforced Polymers; Post and Core Technique; Root Canal Preparation; Solid-State Lasers