Assessment of impact type of orthodontic adhesive on shear bond strength of orthodontic brackets

Abstract

Background:  To evaluate the effect of type of orthodontic adhesive on shear bond strength 
of orthodontic brackets. 
Materials & methods: A total of 90 newly extracted premolars were bonded to 0.022 SS 
brackets and equally divided into two groups based on adhesive used: Transbond XT (light
cure adhesive, 3M Unitek.) and Rely-a-Bond (self-cure adhesive, Reliance Orthodontic 
Product,). Shear bond strength of orthodontic brackets was evaluated. 
Results: Transbond XT (16.2 MPa) attained the highest bond strength. Self-etching 
adhesives (Transbond Plus, 12.7 MPa) showed clinically acceptable shear bond strength 
(SBS) values.