Bond Strength of Orthodontic Brackets to Temporary Crowns: In Vitro Effects of Surface Treatment.

Sadeem H. Alzaghran*, Suliman Y. Shahin, Mohammed M. Gad

*First year Prosthodontics Resident, Marquette University

INTRODUCTION

A substantial number of patients seek orthodontic treatment for various reasons, which in turn has caused many clinical challenges during orthodontic therapy. For example, in many cases, orthodontic treatment is delivered in conjunction with other specialties to facilitate restorative therapy of other dental professions, such as prosthodontics.

In cases of tooth fracture or gross carious lesions extending subgingivally, a provisional crown is needed prior to orthodontic root extrusion to avoid biological width violation in the permanent crown. A provisional crown serves to provide temporary protection, stabilization, and function of the tooth, as it also determines the esthetic outcome of the final restoration.

In such a clinical situation, an orthodontic bracket is bonded to the provisional crown material (PCM). A weak bond of the brackets to provisional materials will lead to a high failure rate, with adverse consequences on the cost and efficiency of orthodontic therapy and on patient comfort.

OBJECTIVES

This study aimed to evaluate the effect of different grit sizes of diamond burs and sandblasting surface treatment on the shear bond strength of orthodontic brackets to provisional crowns.