A novel approach in assessment of coronal leakage of intraorifice barriers: a saliva leakage and micro-computed tomographic evaluation.

ORCiD

Dr. Ove A. Peters: 0000-0001-5222-8718

Department

Endodontics

Document Type

Article

Publication Title

Journal of Endodontics

ISSN

0099-2399

Volume

34

Issue

7

DOI

10.1016/j.joen.2008.04.005

First Page

871

Last Page

875

Publication Date

7-1-2008

Abstract

The efficacy of amalgam, Fuji-Plus, Geristore, and mineral trioxide aggregate (MTA) as intraorifice barriers was compared in a simulated saliva leakage model. Fifty teeth were divided into 4 experimental (n = 10 each) and 2 control groups (n = 5 each). Two millimeters of the materials was placed as intraorifice barriers and brought into contact with human saliva in a coronal reservoir. Bacterial leakage into the apical reservoir was assessed daily for 3 months. Geristore barriers leaked significantly more often (5/10) than Fuji-Plus (0/10, P < .05) at 60 days. The first Fuji-Plus sample leaked after 70 days; after 90 days, 3 (Fuji-Plus), 4 (MTA, amalgam), and 6 (Geristore) samples leaked. There were no significant differences between the experimental groups at that time point. Three-dimensional gap volumes in the barrier-dentin interface and the porosity of the barrier materials were compared by using micro-computed tomography (microCT). A measurable gap was evident in only 1 specimen with an MTA barrier. MTA was significantly less porous than Fuji-Plus and Geristore (P < or = .05), whereas amalgam was too radiopaque to allow microCT measurements. In conclusion, Fuji-Plus might be an effective intraorifice barrier (up to 70 days in vitro), but all 4 materials showed leakage in some specimens at 90 days.

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