Benefits of a two-step cementation procedure for prefabricated fiber posts.
OBJECTIVE
To determine whether two-step cementation of prefabricated fiber posts leads to higher bond strengths.


METHODS
Forty-eight human canine teeth were divided into six groups and fiber posts were cemented with DC Core, RelyX Unicem and Panavia F2.0, according to a one-step or two-step procedure. Per root, four cross-sections were prepared. The differences in push-out strength between procedure, cement and location within the root were determined.


RESULTS
For all cements, the push-out strengths for the two-step procedure were significantly higher than for the one-step procedure (p < 0.001). Differences between the cements for both the one-step and two-step procedure were not statistically significant (p = 0.05).


CONCLUSIONS
The reduction of the C-factor by means of a two-step cementation, a procedure equivalent to the layering technique of composite restorations, resulted in significantly higher bond strengths. The increase of 60% in bond strength may be beneficial to the retention of post and core restorations.
Jongsma
Leontine A
LA
Department of Dental Materials Sciences, ACTA, Universiteit van Amsterdam amd Vrije Universiteit, Amsterdam, the Netherlands.
Bolhuis
Peter B
PB
Pallav
Prem
P
Feilzer
Albert J
AJ
Kleverlaan
Cornelis J
CJ
D000704:Analysis of Variance; D002484:Cementation / Q000379:methods*; D003188:Composite Resins; D003481:Cuspid; D018772:Dental Marginal Adaptation; D003786:Dental Pulp Cavity; D003799:Dental Stress Analysis; D005898:Glass; D006801:Humans; D011176:Post and Core Technique; D019279:Resin Cements / Q000737:chemistry*; D018709:Statistics, Nonparametric
D003188:Composite Resins; D019279:Resin Cements; C009753:fiberglass