Aaron Rondon

Abstract

The technique of bonding orthodontic brackets utilizing a transfer tray, otherwise known as indirect bonding, is a dichotomous subject. It allows for more accurate bracket placement and reduced chair time for the patient and doctor, yet its technique sensitivity can yield bracket failures at the time of tray removal. With the recent development of 3M's Sondhi Rapid Set, an adhesive specifically designed for orthodontic bonding, the purpose of this study was to compare this fairly new indirect adhesive with 3M's Transbond XT and Reliance's Rely-A-Bond.

Two hundred and seventy freshly extracted bovine teeth were mounted in acrylic resin and divided into 18 groups of 15 teeth each. Nine groups were bonded indirectly and nine groups were bonded directly. The direct bonded groups served as a control. The same method of indirect bonding was used for each indirect sample. The indirect bonding method was developed by L. White and included the use of the Surebonder glue gun for the fabrication of the transfer tray. The direct bonded and indirect bonded samples were debonded at 10 min., 24 hr., and 30 days using the Instron Universal Testing Machine. Three different data groups were arranged: a data group which listed all samples, a data group that included plus or minus 1 standard deviation from the mean, and a binomial data group. Statistical comparisons were made for each resin bonded directly vs. indirectly. Statistical comparisons were also made between the individual adhesives to see if one performed better than another. Mann-Whitney U-Test was carried out for the all data and plus/minus 1 standard deviation groups while a Two-Sample Binomial Test was used for the binomial data. Transbond XT bonded directly had statistically significant greater bond strength than Transbond XT when bonded indirectly. Rely-A-Bond and Sondhi adhesives produced no statistically significant difference when bonded directly vs. indirectly. Transbond XT when bonded directly showed statistically significant greater bond strength than Rely-A-Bond or Sondhi when those adhesives were bonded directly. Yet, when Transbond XT was bonded indirectly, no statistical significant difference resulted when comparing Sondhi adhesive bonded indirectly, or Rely-A-Bond bonded indirectly.

LLU Discipline

Orthodontics and Dentofacial Orthopedics

Department

Orthodontics and Dentofacial Orthopedics

School

Graduate School

First Advisor

Craig Andreiko

Second Advisor

Jay S. Kim

Third Advisor

Leroy Leggitt

Fourth Advisor

Raymond Sugiyama

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

2002

Date (Title Page)

8-2002

Language

English

Library of Congress/MESH Subject Headings

Dental Bonding; Resins; Dental Cements

Type

Thesis

Page Count

viii; 36

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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