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Microtensile Bond Strength of Nonmetallic Dowels Bonded to Radicular Dentin with Self‐Etch Adhesives
Author(s) -
Abo ElEla Omar A.,
Atta Osama A.,
ElMowafy Omar
Publication year - 2009
Publication title -
journal of prosthodontics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.902
H-Index - 60
eISSN - 1532-849X
pISSN - 1059-941X
DOI - 10.1111/j.1532-849x.2008.00394.x
Subject(s) - dowel , dentin , bond strength , materials science , adhesive , dentistry , ultimate tensile strength , composite material , medicine , layer (electronics)
Purpose: 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 (μTBS) of nonmetallic dowels, including a novel glass fiber dowel, when bonded to radicular dentin with self‐etch adhesives. Materials and 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 μTBS values were determined. Results: Mean μTBS 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 μTBS. Microtensile bond strengths were not significantly different with cervical root dentin than with middle root dentin.