Abstract
Assessment of Shear Bond and Failure Surface of Bonded and Rebonded Brackets Using Conventional Acid and Micro-etching Techniques
Highlights
Direct bonding of brackets and other attachments with composite resins have become a routine technique in fixed orthodontic treatment(1)
Higher shear bonding force with 20 second acid etching than 5 second microetching were as a significantly less probability of bond failure for acid etching compared to micro-etching
Brackets bonded to etched enamel showed a mixed mode of bond failure whereas following sandblasting; failure was adhesive at the enamel/ composite interface
Summary
Direct bonding of brackets and other attachments with composite resins have become a routine technique in fixed orthodontic treatment(1). Hamed MM al.,(2) orthodontic brackets have been bonded to teeth with resin adhesives following enamel pretreatment with acid. The acid etch technique has several undesirable sequel These include loss of enamel, cracks and scratches due to etching, debonding, and clean up and retention of resin tags or indelible staining(3). To overcome some problems presented by the acid etch technique, sandblasting technique has been investigated. This technique has been used in orthodontics for treating the fitting surfaces of bands and brackets to enhance bond strength(4) and for the removal of cement from failed brackets prior to recementation(5). Within the development of miniature intra-oral sandblasters, it would seem timely to explore this possibility further
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
