Retention of fiber posts cemented at different time intervals in canals obturated using an epoxy resin sealer

Vano, M.; Cury, A.H.; Goracci, C.; Chieffi, N.; Gabriele, M.; Tay, F.R.; Ferrari, M.

doi:10.1016/j.jdent.2008.05.016

« Previous Next »Journal of Dentistry
Volume 36, Issue 10 , Pages 801-807, October 2008

Retention of fiber posts cemented at different time intervals in canals obturated using an epoxy resin sealer

M. Vano
- Department of Restorative Dentistry and Dental Materials, University of Siena, Siena, Italy
- Department of Oral Surgery, University of Pisa, Pisa, Italy
A.H. Cury
- Department of Restorative Dentistry and Dental Materials, University of Siena, Siena, Italy
C. Goracci
- Department of Restorative Dentistry and Dental Materials, University of Siena, Siena, Italy
N. Chieffi
- Department of Restorative Dentistry and Dental Materials, University of Siena, Siena, Italy
M. Gabriele
- Department of Oral Surgery, University of Pisa, Pisa, Italy
F.R. Tay
- Department of Restorative Dentistry and Dental Materials, University of Siena, Siena, Italy
- Department of Oral Biology and Maxillofacial Pathology, School of Dentistry, Medical College of Georgia, Augusta, GA, USA
M. Ferrari
- Department of Restorative Dentistry and Dental Materials, University of Siena, Siena, Italy
- Corresponding author at: Department of Restorative Dentistry and Dental Materials, University of Siena, Policlinico Le Scotte, Viale Bracci, 53100 Siena, Italy. Tel.: +39 03384623264; fax: +39 0577233117.

Received 28 January 2008; received in revised form 23 May 2008; accepted 29 May 2008.

Abstract

Objectives

To evaluate the effect of immediate versus delayed post space preparation and cementation on the retention of different types of fiber posts in canals obturated with an epoxy resin sealer.

Methods

Sixty-eight single-rooted human teeth were decoronated and the root canals were shaped with rotary instruments and obturated with gutta-percha and an epoxy resin sealer. The teeth were divided into four experimental groups according to the different times of post space preparation and cementation: immediate (group 1), 24h (group 2) and 1 week (group 3) after root canal filling. Control group (group 4) with no root canal obturation was included. Two teeth were randomly selected from each group for SEM examination. Each group was further divided into three subgroups of five teeth each (n=5), according to the type of post and the materials used for luting the posts. A push-out test was performed and differences among experimental groups were analyzed with two-way ANOVA and Tukey test (α=0.05).

Results

Interfacial strength values achieved in group 1, where an immediate cementation was performed, were significantly lower (p<0.05) than those in group 2 and group 3 in which post cementation was performed 24h or 1 week after the root canal filling.

Post type affected post retention, FRC Postec and DT Light Post posts achieved higher interfacial strengths than ENA Post (p<0.05). SEM examination revealed a more conspicuous presence of sealer remnants on the walls of immediately prepared post spaces.