Date of Award

Spring 2000

Document Type

Thesis - Restricted

Degree Name

Master of Science (MS)

Department

Dentistry

First Advisor

Bradley, Thomas G.

Second Advisor

Iacopino, Anthony M.

Third Advisor

Kessler, Marissa C.

Abstract

In the past two decades, the scope of orthodontics has expanded to include more adult patients. Many of these patients will have various porcelain restorations placed on their teeth. As a result, there arises a concern for direct-bonding techniques to porcelain restorations. Ideal adhesion to a porcelain surface should allow orthodontic treatment without bond failure, but not significantly alter porcelain integrity after debonding. Various studies have investigated orthodontic bonding with metal brackets to traditional high fusing ceramo-metal restorations. These studies have established a protocol for optimal bonding to the commonly used high fusing porcelain. However, more esthetic low fusing and all ceramic porcelain restorations are replacing the high fusing porcelains used in the past. Furthermore, patients frequently request tooth colored ceramic orthodontic appliances during treatment instead of metal brackets because of esthetic concerns. The relationship and bonding characteristics of these newer porcelain systems with metal and ceramic orthodontic attachments have not been investigated. The purpose of this study was to evaluate the shear bond strengths and debonding characteristics of metal and ceramic brackets bonded to a traditional high fusing porcelain and 4 contemporary porcelain systems in an effort to evaluate the effectiveness of the current bonding protocol...

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