title: Microtensile bond strength of nonmetallic dowels bonded to radicular dentin with self-etch adhesives.
abstract: OBJECTIVE
  The bonding potential of nonmetallic dowels to root dentin, particularly with new self-etch adhesives, has not been fully investigated. The aim of this study was to determine microtensile bond strength (microTBS) of nonmetallic dowels, including a novel glass fiber dowel, when bonded to radicular dentin with self-etch adhesives.
  
  
  METHODS
  Crowns of extracted anterior teeth were severed, and endodontic treatment was performed. Teeth were divided into six groups according to dowel/adhesive. Teeth received dowels as follows: group I: Light Post + Clearfil-SE Bond/Panavia-F (SE/PF), group II: Light Post + Xeno III/Panavia-F (XN/PF), group III: ParaPost Fiber White + SE/PF, group IV: ParaPost Fiber White + XN/PF, group V: everStick Post + SE/PF, and group VI: everStick Post + XN/PF. Teeth were sectioned to produce 1 mm specimens from both cervical and middle thirds with the dowel at the center. Specimens were tested in a special machine, and microTBS values were determined.
  
  
  RESULTS
  Mean microTBS values and SDs in MPa for the cervical region were as follows: group I: 10.36 (1.88), group II: 8.51 (1.41), group III: 11.61 (1.06), group IV: 9.37 (1.61), group V: 14.22 (1.16), and group VI: 12.97 (1.69). Group V had the highest mean value-significantly higher than the means of groups I, II, III, and IV (p < 0.0001 to p < 0.02). For the middle region: group I, 9.72 (1.61); group II, 7.62 (1.42); group III, 10.28 (0.75); group IV, 8.48 (1.51); group V, 13.23 (1.06); group VI, 11.07 (1.49). Group V also had highest mean value-significantly higher than the means of groups I, II, III, and IV (p < 0.0001 to p < 0.004).
  
  
  CONCLUSIONS
  everStick glass fiber dowel, bonded with either adhesive, showed the highest microTBS. Microtensile bond strengths were not significantly different with cervical root dentin than with middle root dentin.
authors.affiliation: Department of Fixed Prosthodontics, Suez Canal University, Ismailia, Egypt.
authors.forename: Omar A
authors.initials: OA
authors.lastname: Abo El-Ela
authors.forename: Osama A
authors.initials: OA
authors.lastname: Atta
authors.forename: Omar
authors.initials: O
authors.lastname: El-Mowafy
mesh_terms: D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry*; D017267:Dental Prosthesis Design; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D005898:Glass / Q000737:chemistry; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D011176:Post and Core Technique / Q000295:instrumentation*; D011791:Quartz / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D018915:Root Canal Preparation / Q000379:methods; D013314:Stress, Mechanical; D013696:Temperature; D013718:Tensile Strength; D013997:Time Factors; D019237:Tooth Cervix / Q000648:ultrastructure; D014867:Water / Q000737:chemistry
chemical_list: C438313:Clearfil SE Bond; D003188:Composite Resins; D003764:Dental Materials; D017220:Dentin-Bonding Agents; C438843:Panavia-Fluoro; D019279:Resin Cements; C487957:Xeno III; C496140:everStick; C009753:fiberglass; D014867:Water; D011791:Quartz