Abstract

Introduction: This research was designed to compare the microleakage of various restorative materials used for preventive resin restorations and two methods of cavity preparation. The purpose of this study was: (1) to compare microleakage of four different restorative materials using two different type of preparation methods (bur and air particle abrasion) and (2) whether the use of a pit and fissure sealant over the restoration decreases microleakage.

Methods: One hundred and twenty eight, permanent human molars were randomly divided into four groups and restored with four restorative materials. Each group had been randomly divided into two subgroups. The teeth in each subgroup were prepared with the air particle abrasion or a bur. Each subgroup was further divided into two groups to which one of two pit and fissure sealants were placed on half of the occlusal surface. All teeth in both groups were restored according to manufacturers' instructions. After placing the restoration, the teeth were thermocycled, stained, mounted in an acrylic block and sectioned. Microleakage was then assessed according to dye penetration.

Results: Comparison of microleakage found in restorations placed with sealants: Delton Plus showed less microleakage than Ultraseal XT, when air abrasion was used with Herculite XRV. On the other hand Ultraseal XT was superior to Delton Plus when Herculite XRV and SureFil were used as a restoration prepared with a bur. Cavity preparation with a bur was superior to air abrasion when Herculite XRV or SureFil were used as a filling material and Ultraseal XT was used as a sealant. Cavity preparation with air abrasion was superior to the bur method when Herculite XRV or SureFil were used with the Delton Plus as the sealant.

When the four filling materials were compared for microleakage, Herculite XRV and SureFil were superior to Flow-It and Dyract AP when air abrasion was used with Delton Plus as the sealant.

Conclusions: Results indicate that in most instances, there was no difference between the materials tested, however, in selected cases SureFil and Herculite XRV did show significantly less microleakage than Flow-It and Dyract AP for most PRR restorations. Herculite XRV and SureFil were the best filling materials when the bur method of preparation was used and Ultraseal XT was the sealant placed. Herculite XRV and SureFil were also the best filling materials when used with air abrasion and Delton Plus sealant. This study concludes that no one method was consistently superior to another for reducing microleakage in preventive resin restorations.

LLU Discipline

Pediatric Dentistry

Department

Pediatric Dentistry

School

Graduate School

First Advisor

John Peterson

Second Advisor

James Dunn

Third Advisor

Jay S. Kim

Fourth Advisor

Carlos Muñoz

Fifth Advisor

Doug Roberts

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

2002

Date (Title Page)

6-2002

Language

English

Library of Congress/MESH Subject Headings

Resins; Dental Cements; Dental Materials; Dental Leakage; Pit and Fissure Sealants; Air Abrasion, Dental

Type

Thesis

Page Count

viii; 32

Digital Format

PDF

Digital Publisher

Loma Linda University Libraries

Usage Rights

This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.

Collection

Loma Linda University Electronic Theses and Dissertations

Collection Website

http://scholarsrepository.llu.edu/etd/

Repository

Loma Linda University. Del E. Webb Memorial Library. University Archives

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