A Novel Approach in Assessment of Coronal Leakage of Intraorifice Barriers: A Saliva Leakage and Micro-computed Tomographic Evaluation

Parisa Zakizadeh, Sally J. Marshall, Charles I. Hoover, Ove A. Peters, W. Craig Noblett, Stuart A. Gansky, Harold E. Goodis

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

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 (μCT). A measurable gap was evident in only 1 specimen with an MTA barrier. MTA was significantly less porous than Fuji-Plus and Geristore (P ≤ .05), whereas amalgam was too radiopaque to allow μCT 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.

Original languageEnglish (US)
Pages (from-to)871-875
Number of pages5
JournalJournal of Endodontics
Volume34
Issue number7
DOIs
StatePublished - Jul 2008
Externally publishedYes

Bibliographical note

Funding Information:
This project was supported by an Endodontic Research Grant from the American Association of Endodontists Foundation (#85993-441968).

Keywords

  • Coronal leakage
  • intraorifice barrier
  • micro-computed tomography
  • saliva

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