title: Push-out bond strength of quartz fibre posts to root canal dentin using total-etch and self-adhesive resin cements.
abstract: OBJECTIVE
  Several adhesive systems are available for cementation of fibre posts into the root canal. The aim of the present study was to investigate the push-out bond strengths of quartz fibre posts to root dentin with the use of different total-etch and self-adhesive resin cements.
  
  
  METHODS
  Ninety single-rooted human premolars were endodontically treated and standardized post-spaces were prepared. Fibre posts were cemented with different luting agents: total-etch (Nexus NX3, Duo-Link, and RelyX ARC) and self-adhesive resin cements (Maxcem Elite, BisCem, and RelyX Unicem). Three post/dentin sections (coronal, middle and apical) were obtained from each specimen, and push-out bond strength test was performed in each section at a cross-head speed of 0.5 mm/min. Data was analyzed with two-factor and one-way analysis of variance and a post-hoc Tukey test at a significance level of p < 0.05.
  
  
  RESULTS
  Cement type, canal region, and their interaction significantly influenced bond strength. Significantly higher bond strength values were observed in the apical region of self-adhesive cements. Only Duo-Link and RelyX ARC cements resulted in homogeneous bond strengths.
  
  
  CONCLUSIONS
  Cementation of quartz fibre posts using self-adhesive cements provided higher push-out bond strengths especially in the apical region, while total-etch cements resulted in more uniform bond strengths in different regions of the root canal.
authors.affiliation: Department of Operative Dentistry, School of Dentistry, Tabriz University of Medical Sciences, Gholghasht Street, Daneshghah Avenue, Tabriz, Iran.
authors.forename: M-A
authors.initials: MA
authors.lastname: Kahnamouei
authors.forename: N
authors.initials: N
authors.lastname: Mohammadi
authors.forename: E-J
authors.initials: EJ
authors.lastname: Navimipour
authors.forename: M
authors.initials: M
authors.lastname: Shakerifar
mesh_terms: D001840:Dental Bonding; D045662:Dental Etching; D003804:Dentin; D006801:Humans; D008422:Materials Testing; D011791:Quartz; D019279:Resin Cements; D012390:Root Canal Therapy
chemical_list: D019279:Resin Cements; D011791:Quartz