Abstract

The radiodensity of a composite resin can greatly influence a clinician's ability to analyze a restoration for failure. The purpose of this study was to determine the relative radiopacities of 29 resin restorative materials compared to enamel, and to verify the comparable radiopacity between shades of 23 of the restorative composite resin materials. Composite resin discs measuring >5mm in diameter and 2 mm in thickness were made and polymerized. Radiographs were taken of the composite resin discs, which included an aluminum step wedge for calibration and a densitometer was used to measure the radiodensity of the composite resin samples. The coefficient of variation was calculated for the data and a Wilcoxon-Rank Sum test was performed showing that all the composite resin samples were significantly different in radiodensity from the enamel control (p < .0001). In 19 of the 23 pairs of composite resins (83%) there was no statically significant difference in radiodensity. The coefficient of variation ranged from 0.86% to 3.54% for the data collected. 26 of the 29 composite resin resins were more radiopaque than enamel, and 21 of the 29 had a density value of less than 0.90 D which is approximately 0.1 D less than enamel. A density value less than enamel facilitates clinicians in the diagnosis of recurrent caries, defects, and overhangs in composite resin restorations.

LLU Discipline

Pediatric Dentistry

Department

Pediatric Dentistry

School

Graduate School

First Advisor

Carlos Muñoz

Second Advisor

Jay Kim

Third Advisor

John Peterson

Fourth Advisor

Kandasamy Rengasamy

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

2003

Date (Title Page)

9-2003

Language

English

Library of Congress/MESH Subject Headings

Dental Enamel -- radiography; Dental Materials; Composite Resins -- analysis; Dental Restoration, Permanent

Type

Thesis

Page Count

ix; 43

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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