A comparison of microleakage of fissure sealants following three different application techniques :
Date
2001
DOI
Authors
Al Emadi, Fatma Darwish
Version
OA Version
Citation
Abstract
Purpose: The purpose of this in vitro study was to compare the microleakage of fissure sealant placed on the occlusal surface of premolars using three different application techniques. Methods: A total of ninety four extracted sound human premolar teeth were assigned in this in vitro study. The samples were kept in distilled water for not more than a week and then randomly were distributed into three different test groups with 30 teeth in each; (A) teeth in the first group were treated with 37% phosphoric acid etching and Clinpro fissure sealant; (B) teeth in the second group were treated with 37% phosphoric acid, single bottle dentin bonding agent and fissure sealant; (C) teeth in the third group were treated with self etch adhesive and fissure sealant. Groups B and C were further divided equally into two subgroups based on light curing of dentin bonding agent and self etch adhesive prior to the application of sealant. A negative control of 2 teeth and a positive control group of 2 teeth were included to confirm that the basic conditions of the experiment are able to produce negative and positive results. Samples were thermocycled, stained with 5% methylene blue, sectioned and examined for microleakage under the stereomicroscope with a magnification range of X30 to X40. To determine the most appropriate time for maximum dye penetration, a pilot study of 12 teeth was conducted. Groups were compared using Pearson Chi square analysis. Results: No dye penetration was observed in 16, 7, and 11 teeth for groups A, B, and C respectively. Statistically significant difference was found in microleakage between the use of different application techniques (P[less than] 0.01). Etch and sealant group exhibited significantly higher microleakage compared to the other groups. Conclusion: The application of a bonding agent layer prior to a sealant afforded less microleakage than when no bonding agent was used. Furthemore, the separate curing of the bonding agent resulted in significantly less microleakage (P[less than] 0.01). Clinical trials should be performed to evaluate the performance of these techniques before definitive conclusions can be drawn.
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Thesis (MSD) --Boston University Institute for Dental Research and Education, Dubai, 2011 (Pediatric Dentistry).
Includes bibliographic references: leaves 86-95.
Thesis (MSD) --Boston University Institute for Dental Research and Education, Dubai, 2011 (Pediatric Dentistry).
Includes bibliographic references: leaves 86-95.
License
This work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.