The effects of different surface treatments on the adhesive strength between POPO fiber post and resin cement / 华西口腔医学杂志

ABSTRACT

<p><b>OBJECTIVE</b>To test the effects of different surface treatments on the adhesive strength between POPO fiber post and resin cement.</p><p><b>METHODS</b>50 fiber posts were divided into 5 groups at random according to different surface treatments. Group A Control group, no treatment. Group B Silanization for 60 s. Group C Etching for 30 s. Group D Etching for 60 s. Group E Etching for 120 s. Crowns of 45 fresh premolars were removed and assigned randomly to 5 test groups. After bonding and embedding the retentive force of the samples were tested by an universal testing machine. The morphology of the post surface was observed by a scanning electron microscope (SEM).</p><p><b>RESULTS</b>There were significant differences among the effects of different surface treatments on the adhesive strength between POPO fiber post and resin cement (P < 0.05). Group D showed the highest adhesivestrength (207.33 +/- 7.58) N. There was significant different between group D and E (P = 0.027), but there was not significant difference between group D and C (P = 0.112). Significant changes of post surface after different treatments were discovered by SEM. Surface roughness and area of fiber exposure increased.</p><p><b>CONCLUSION</b>The adhesive strengths have been enhanced after conducting different surface treatments on the fiber posts.</p>