Year : 2018

Volume : Volume 9

Issue : Issue 1

Address for correspondence :
Dr. Khaidem Deba Singh.
KhaidemDebaSingh@gmail.com

Abstract

Background:  Zirconia is used as a framework, and, as it presents relative opacity, it is covered with porcelain containing optical properties similar to those of natural teeth. We planned the present study to clinically evaluate the shear bond strength of orthodontic brackets bonded to Zirconium Crowns. Materials & methods: The present study included evaluation and comparison of shear bond strength of orthodontic brackets bonded to Zirconium Crowns. Thirty samples of all-zirconium ceramic, on which orthodontic brackets were bonded, 15 metallic and 15 ceramic polycrystalline brackets were made. Simplified method of bonding of the orthodontic brackets to the crown surface was used for avoiding the effect of base surface design. Same operator bonded the orthodontic brackets following the same protocols. Universal force testing machine was used for assessing the shear bond strength.  Results: Mean shear bond strength of the specimens bonded with metallic bracket was 8.02 MPa, while mean shear bond strength of the specimens bonded with ceramic bracket was 5.13 MPa respectively. Significant results were obtained while comparing the mean shear bond strength of the subjects of the metallic bracket group and ceramic bracket group. Conclusion: In comparison to the ceramic brackets, metallic brackets bonds more strongly to the all zirconium crowns because of their better retentive properties.

Keywords: Bond strength, orthodontic bracket, Zirconium.