Effect of EDTA conditioning upon the retention of fibre posts luted with resin cements.

Abstract:

AIM:To determine if a final rinse with EDTA improves the short-term in-tooth retentive strength of adhesively luted fibre-reinforced composite posts. METHODOLOGY:Six different commercial fibre post systems were tested. Post spaces in extracted human anterior teeth were irrigated with either 6% NaOCl or 6% NaOCl followed by 17% EDTA. Posts were luted using the manufacturer's recommended bonding agent and luting cement. Two different sizes of post were tested for each post system. After 24 h of storage, the retentive strength of the post to the tooth (14 per group, 336 total) was tested using a pull-out technique. Three-way anova and the Student-Newman-Kuels test were used to test the effects of irrigation regimen, post size and post brand on the retentive strength of the fibre post. RESULTS:Almost every sample failed at the interface between dentine and luting cement. Irrigation method did not have any significant effect (P > 0.14) for any group other than ParaPost Fibre White (P < 0.001). The overall retention of a post appeared to be correlated to the amount of surface texture on the post; the smooth ICEPost was the least retentive brand, the textured FibreKor and the ParaPost Fibre White posts were moderately retained, and the threaded Flexi-Post Fibre and the Flexi-Flange Fibre posts were the most retentive brands tested. For all brands, larger diameter posts were more retentive than smaller diameter posts (P < 0.008). CONCLUSIONS:A final rinse of EDTA did not improve the short-term retention of fibre posts except for ParaPost Fibre White.

journal_name

Int Endod J

authors

Rasimick BJ,Shah RP,Musikant BL,Deutsch AS

doi

10.1111/j.1365-2591.2008.01482.x

subject

Has Abstract

pub_date

2008-12-01 00:00:00

pages

1101-6

issue

12

eissn

0143-2885

issn

1365-2591

pii

IEJ1482

journal_volume

41

pub_type

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