title: Bond strengths of tooth-colored posts, effect of sealer, dentin adhesive, and root region.
abstract: OBJECTIVE
  To evaluate the effect of sealer, dentin bonding agent, and root region on the push-out bond strengths of three tooth colored posts.
  
  
  METHODS
  24 extracted human single rooted maxillary central incisors and canines were endodontically-treated using gutta percha and Roth's 801 or AH26 sealer. Posts (Cosmopost, Fibrekor, or Parapost Fiber White) were placed using one of two adhesive systems (Parapost Cement Conditioner with Parapost Cement, or One-Step with Hi-X Post self-cure resin cement). The push-out test was performed on different sections of the root to measure bond strengths.
  
  
  RESULTS
  Cosmopost showed significantly lower mean bond strengths than either Fibrekor or Parapost. Bond strengths of the posts in the crown section were significantly higher than those in any of the three root areas measured. Neither the eugenol-containing sealer nor the bonding agent type had any effect on bond strength. Post type and root region significantly affected bond strength while sealer type or bonding agent had no effect on bond strength.
authors.affiliation: University of Minnesota, Division of Operative Dentistry, Department of Restorative Sciences, 8-450 Moos Tower, 515 SE Delaware St., Minneapolis, MN 55455, USA.
authors.forename: John S
authors.initials: JS
authors.lastname: Kurtz
authors.forename: Jorge
authors.initials: J
authors.lastname: Perdigão
authors.forename: Saulo
authors.initials: S
authors.lastname: Geraldeli
authors.forename: James S
authors.initials: JS
authors.lastname: Hodges
authors.forename: Walter R
authors.initials: WR
authors.lastname: Bowles
mesh_terms: D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D017267:Dental Prosthesis Design; D003786:Dental Pulp Cavity / Q000473:pathology*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D011176:Post and Core Technique / Q000295:instrumentation*; D019279:Resin Cements / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry; D013314:Stress, Mechanical; D019246:Tooth Preparation; D019553:Tooth, Nonvital / Q000628:therapy
chemical_list: C103506:Bis-GMA, BPDM, HEMA dental-bonding resin; D003188:Composite Resins; D003738:Dental Cements; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D019279:Resin Cements; D012387:Root Canal Filling Materials