title: Effect of Laser-Activated Irrigation on the Push-Out Bond Strength of ProRoot Mineral Trioxide Aggregate and Biodentine in Furcal Perforations.
abstract: OBJECTIVE
  The objective of the present study was to assess the effect of erbium, chromium: yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser-activated irrigation (LAI) of NaOCl on the push-out bond strength of furcal perforations repaired with ProRoot mineral trioxide aggregate (MTA) and Biodentine.
  
  
  BACKGROUND
  Several studies investigated the adhesion of calcium silicate-based cements after exposure to endodontic irrigants, while effect of LAI on bond strength remains to be elucidated.
  
  
  METHODS
  Bur-cut furcal perforations with standard dimensions were created in 100 extracted human mandibular molars. Teeth were randomly distributed into two groups (n = 50/group) according to the repair material applied: (1) ProRoot MTA or (2) Biodentine. The specimens were further assigned into five subgroups according to the irrigation regimens used over the set materials: (a) distilled water with needle irrigation; (b) 5.25% NaOCl with needle irrigation; (c) distilled water with LAI; (d) 5.25% NaOCl with LAI; and (e) no irrigation (control). Bond strengths of the test materials were assessed by using push-out bond strength test.
  
  
  RESULTS
  Biodentine showed significantly higher dislocation resistance than ProRoot MTA (p < 0.05). Laser activation of 5.25% NaOCl and distilled water did not significantly affect the push-out bond strength results (p > 0.05).
  
  
  CONCLUSIONS
  Biodentine showed higher dislocation resistance than ProRoot MTA as a perforation repair material. Er,Cr:YSGG laser activation of irrigation aqueous solutions had no adverse effect on push-out bond strength of Biodentine and ProRoot MTA.
authors.affiliation: 1 Department of Endodontics, Hacettepe University , Ankara, Turkey .
authors.forename: Emre
authors.initials: E
authors.lastname: Nagas
authors.affiliation: 1 Department of Endodontics, Hacettepe University , Ankara, Turkey .
authors.forename: Selen
authors.initials: S
authors.lastname: Kucukkaya
authors.affiliation: 1 Department of Endodontics, Hacettepe University , Ankara, Turkey .
authors.forename: Ayhan
authors.initials: A
authors.lastname: Eymirli
authors.affiliation: 1 Department of Endodontics, Hacettepe University , Ankara, Turkey .
authors.forename: Mehmet Ozgur
authors.initials: MO
authors.lastname: Uyanik
authors.affiliation: 2 Department of Pediatric Dentistry, Faculty of Dentistry, Hacettepe University , Ankara, Turkey .
authors.forename: Zafer Cavit
authors.initials: ZC
authors.lastname: Cehreli
mesh_terms: D017607:Aluminum Compounds / Q000528:radiation effects*; D000704:Analysis of Variance; D017610:Calcium Compounds / Q000528:radiation effects*; D001840:Dental Bonding / Q000379:methods*; D003799:Dental Stress Analysis; D004338:Drug Combinations; D006801:Humans; D066298:In Vitro Techniques; D053844:Lasers, Solid-State / Q000627:therapeutic use*; D028022:Low-Level Light Therapy / Q000379:methods*; D008963:Molar; D015999:Multivariate Analysis; D010087:Oxides / Q000528:radiation effects*; D012387:Root Canal Filling Materials / Q000528:radiation effects*; D018915:Root Canal Preparation / Q000379:methods*; D017640:Silicates / Q000528:radiation effects*
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate; C506393:tricalcium silicate
keywords: YSGG; endodontics; furcal perforations; lasers