title: [Effect of different bonding procedure and root region on bond strength of fiber posts to root canal].
abstract: OBJECTIVE
  To evaluate the effect of different bonding procedure and different root region on the bond strength of fiber posts to root canal.
  
  
  METHODS
  Forty-two extracted intact human maxillary central incisors were endodontically treated with post spaces be prepared and divided into 6 groups randomly. The fiber posts were then luted with the following different bonding procedures. Group I: total etch dentin bonding agent Luxabond + self-adhesive system Rely XTM Unicem; Group II: total etch dentin bonding agent Luxabond + dual-cure rein cement Luxacore; Group III: self etch dentin bonding agent Contax + self -adhesive system Rely X TM Unicem; Group IV :self etch dentin bonding agent Contax + dual -cure rein cement Luxacore; Group V:self-adhesive system Rely X TM Unicem; Group VI:dual-cure rein cement Luxacore. After dowel cementation, thin-slice push-out test was performed. The bonding interface and dentin surface were examined under scanning electron microscope. The data was statistically analyzed using SPSS13.0 software package.
  
  
  RESULTS
  The results showed that different bonding procedures had significant different impacts on the bond strength (P<0.05).Group I and Group III had significantly higher bond strength compared with other groups. Resin tags of dentin bonding interface were observed in Group I and Group II and intimate adaptations of resin cement with the substrate were revealed.
  
  
  CONCLUSIONS
  Coupled with total etch or self etch dentin bonding agent, self- adhesive system Rely X TM Unicem can improve the bonding strength of fiber posts obviously.
authors.affiliation: Department of Prosthodontics, Dental Center of Xuhui District. Shanghai 200032, China.E-mail:zxf0524@163.com.
authors.forename: Xian-fang
authors.initials: XF
authors.lastname: Zhang
authors.forename: Pei-cheng
authors.initials: PC
authors.lastname: Xu
authors.forename: Wen-hao
authors.initials: WH
authors.lastname: Qian
mesh_terms: D002484:Cementation; D003188:Composite Resins; D001840:Dental Bonding; D003738:Dental Cements; D003786:Dental Pulp Cavity; D003804:Dentin; D017220:Dentin-Bonding Agents; D006801:Humans; D011176:Post and Core Technique; D011897:Random Allocation; D019279:Resin Cements; D012390:Root Canal Therapy
chemical_list: D003188:Composite Resins; C483521:Contax; D003738:Dental Cements; D017220:Dentin-Bonding Agents; C483522:LuxaCore; C090340:Reliance resin cement; D019279:Resin Cements