title: Adhesion between glass fiber posts and resin cement: evaluation of bond strength after various pre-treatments.
abstract: OBJECTIVE
  To evaluate surface roughness and bond strength of glass fiber posts to a resin cement after various surface treatments.
  
  
  METHODS
  Sixty individually formed glass fiber posts with a diameter of 1.5 mm and a length of 20 mm were used for this study. They were randomly assigned to six groups of pre-treatment (n = 10/group): Group C, untreated (control); Group SB, sandblasted; Group SC, silica coated; Group HF, hydrofluoric acid-etched; Group N, Nd:YAG laser irradiated; Group E, Er:YAG laser irradiated. Surface roughness of the posts was measured before and after pre-treatment. The posts were then bonded to resin cement and tensile bond strengths were determined in a universal testing machine. For statistical analysis, two-way ANOVA and post-hoc comparison tests (α = 0.05) were performed.
  
  
  RESULTS
  The highest bond strength value was observed in group HF, followed by group SC. There was a statistically significant difference in bond strength between group C and groups HF, SC and E (p < 0.001, p = 0.002 and p = 0.041, respectively). Posts of group SB and group N showed the highest surface roughness.
  
  
  CONCLUSIONS
  The findings of the present study reveal that hydrofluoric acid-etching, silica coating and Er:YAG laser irradiation provided a significant increase in bond strength between glass fiber posts and resin cement.
authors.affiliation: Department of Prosthodontics, Gulhane Military Medical Academy , Ankara , Turkey.
authors.forename: Cumhur
authors.initials: C
authors.lastname: Sipahi
authors.forename: Bulent
authors.initials: B
authors.lastname: Piskin
authors.forename: Gulsah E
authors.initials: GE
authors.lastname: Akin
authors.forename: Ozden Ozel
authors.initials: OO
authors.lastname: Bektas
authors.forename: Hakan
authors.initials: H
authors.lastname: Akin
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D020906:Air Abrasion, Dental; D000537:Aluminum Oxide / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D045662:Dental Etching / Q000379:methods; D003799:Dental Stress Analysis / Q000295:instrumentation; D005898:Glass / Q000737:chemistry*; D006801:Humans; D006858:Hydrofluoric Acid / Q000737:chemistry; D053844:Lasers, Solid-State; D028022:Low-Level Light Therapy / Q000295:instrumentation; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D011176:Post and Core Technique / Q000295:instrumentation*; D019279:Resin Cements / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength
chemical_list: D003188:Composite Resins; D003738:Dental Cements; C431350:Duo-Link; D008689:Methacrylates; D019279:Resin Cements; C076811:Rocatec; D012821:Silanes; C496140:everStick; C009753:fiberglass; C017492:methacryloxypropyltrimethoxysilane; D000537:Aluminum Oxide; D006858:Hydrofluoric Acid
keywords: acid-etch; bond strength; glass fiber post; laser; sandblasting; silica coating