title: [Effect of different surface treatments on the bond strength of fiber posts to resin cement].
abstract: OBJECTIVE
  To evaluate the effects of five different surface treatments on the bond strength between fiber posts and resin cement.
  
  
  METHODS
  Fifty fiber posts were randomly divided into 5 groups for different surface treatments. Group A was treated with silane coupling agent (Clearfil Porcelain Bond Activator,Kuraray); Group B was treated with silane coupling agent and then coated with dentin bonding agent (Clearfil SE Bond,Kuraray); Group C was immersed in 30% H(2)O(2); Group D was immersed in 30 % H(2)O(2) and then treated with silane coupling agent; Group E received no surface treatment (control group). After bonding to resin cement, each group was then divided into 2 subgroups equally, while one group was stored in sodium chloride for 24 h at 37 degrees centigrade, and the other group was stored in sodium chloride for 24 h at 37 degrees centigrade and then subjected to thermal cycling for 10000 times. Microtensile bond strengths were tested and the data was statistically analyzed using SPSS17.0 software package.
  
  
  RESULTS
  The microtensile bond strength before thermal cycling was (6.7±0.7) MPa for group A,(14.4±1.1) MPa for group B,(10.7±0.9) MPa for group C,(16.0±1.0) MPa for group D and (6.7±1.0) MPa for group E. After thermal cycling, the microtensile bond strength was (6.7±0.7) MPa for group A, (13.1±0.7) MPa for group B, (9.0±0.7) MPa for group C, (15.0±0.9) MPa for group D and (5.6±0.7) MPa for group E. The results showed that surface treatments had significant impact on the bond strength (P<0.05). There was no significant difference between group A and group E. Group D had the highest bond strength compared with the other groups. Microtensile bond strengths were significantly different before and after thermalcycling treatment in each group (P<0.05).
  
  
  CONCLUSIONS
  Thermocycling treatment decreases the bond strength of fiber posts to resin cement with these 5 surface treatments. Coupled with 30 % H(2)O(2) solution and silanization, the bonding strength of fiber posts to resin cement can increase significantly.
authors: Department of Stomatology, Dahua Hospital, Xuhui District. Shanghai 200237; Dental Center of Xuhui District. Shanghai 200032, China. E-mail:dhyyzh@126.com.
authors: Hu
authors: H
authors: Zheng
authors: Jian-Qing
authors: JQ
authors: Guo
authors: Xian-Fang
authors: XF
authors: Zhang
mesh_terms: D001840:Dental Bonding; D003738:Dental Cements; D006861:Hydrogen Peroxide; D011897:Random Allocation; D019279:Resin Cements; D012821:Silanes; D013499:Surface Properties
chemical_list: C076805:Clearfil Porcelain Bond; C438313:Clearfil SE Bond; D003738:Dental Cements; D019279:Resin Cements; D012821:Silanes; D006861:Hydrogen Peroxide