Abstract

PURPOSE: To compare the effect of traditional phosphoric acid etching with Er,Cr:YSGG laser enamel etching on the shear bond strength of sealant material.

METHODS: Extracted healthy third molars were mounted in acrylic exposing the flattest surface available. Three groups of twenty teeth were used to evaluate traditional acid etching with 37% phosphoric acid as a control group as well as two different laser settings. The sealant material was attached using specialized jigs and then subjected to shear bond strength testing utilizing the ultradent method (MTS machine). Statistical methods employed were the Kruskal-Wallis rank test and the Mann-Whitney U test.

RESULTS: Acid etching produced a greater shear bond strength than either laser treatment group; the difference was statistically significant (p < 0.0001). Additionally, the shear bond strength of laser treated enamel at 0.75 W/11% Air was greater than the shear bond strength of laser treated enamel at 0.5 W/11% Air; the difference was also statistically significant (p < 0.0001).

CONCLUSIONS: The results of this study showed that phosphoric acid etching yielded a statistically greater sealant shear bond strength when compared with two Er,Cr:YSGG laser treatment groups.

LLU Discipline

Pediatric Dentistry

Department

Pediatric Dentistry

School

Graduate Studies

First Advisor

John Peterson

Second Advisor

Jay Kim

Third Advisor

Huan Lu

Fourth Advisor

Bonnie Nelson

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

2007

Date (Title Page)

6-2007

Language

English

Library of Congress/MESH Subject Headings

Dental Enamel; Dental Bonding; Dental Materials; Dental Etching

Type

Thesis

Page Count

vii; 23

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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