[The effect of H2O2 surface treatment of posts on the bond strength between glass fiber posts and the resin cement].
OBJECTIVE
To evaluate the effect of H2O2 on the push-out bond strength between glass fiber posts and the resin cement.


METHODS
Eighteen Tenax glass fiber posts and 18 Macthpost glass fiber posts were randomly assigned to 6 groups according to the surface treatments. Group A, no surface treatment (control group); Group B, treated with silane agent; Group C, treated with 3% H2O2, then with silane agent; Group D, treated with10% H2O2, then with silane agent; Group E, treated with20% H2O2, then with silane agent; Group F, treated with 30% H2O2, then with silane agent. The posts were adhered using the resin cement to form cylindrical resin block. Each resin block was sectioned to 7 sections of 1 mm thick. A push-out test was performed on other sections of each post to measure bond strengths. The date was recorded and analyzed with SPSS13.0 software package. The failure modes were examined with stereomicroscope.


RESULTS
The bond strengths of Tenax post from A1 to F1 were (22.35±3.43) MPa, (22.75±1.92) MPa, (27.21±3.60) MPa, (32.32±2.19) MPa, (36.15±2.32) MPa and (40.51±2.37) MPa, respectively. The bond strengths of Macthpost post from A2 to F2 were (17.29±3.23) MPa, (17.01±3.18) MPa, (20.48±2.11) MPa, (23.60±2.60) MPa, (27.65±3.77) MPa and (30.52±2.99) MPa, respectively. No significantly difference (P>0.05) was found between Group A and Group B, except other groups.


CONCLUSIONS
Treatment with H2O2 followed with silane agent can significantly improve the bond strength between Tenax and Macthpost glass fiber posts and resin cement. The group treated with 30% H2O2 has the highest bond strength, and the treatment procedure is more useful to improve the adhesion of the glass fiber post. Supported by Science and Technology Plan Project of Department of Health of Jiangxi Province (20131084).
Department of Prosthodontics, the Affiliated Stomatological Hospital of Nanchang University. Nanchang 330006, Jiangxi Province, China.E-mail:512660497@qq.com.
Jing
J
Wang
Jian-hong
JH
Wang
Jing
J
Guo
Hong-shui
HS
Zhu
D001840:Dental Bonding; D005898:Glass; D006801:Humans; D006861:Hydrogen Peroxide; D008422:Materials Testing; D011176:Post and Core Technique; D011897:Random Allocation; D019279:Resin Cements; D012821:Silanes; D013499:Surface Properties
D019279:Resin Cements; D012821:Silanes; C009753:fiberglass; D006861:Hydrogen Peroxide