Moisture contamination is a common reason for bond failure. Since cyanoacrylate adheres to wet surfaces, could enable practitioners to bond attachments in wet conditions where the use of other materials has proved difficult. The purpose of present study was to evaluate the performance of a cyanoacrylate orthodontic adhesive with regard to shear bond strength in comparison with a conventional no-mix orthodontic composite adhesive for bonding brackets.
Methods:
In this study Seventy four extracted premolars were used. After cleaning and polishing teeth, they divided in two groups randomly. In first group teeth were etched using 37% phosphoric acid after applying primer brackets were bonded using No-mix. In second group teeth were etched with 35% phosphoric acid then bracket were bonded using moisture compatible cyanoacrylate. Shear Bond strengths were assessed using an Instron Universal Testing Machine. The crosshead of the Instron moved at a constant speed of 0.5 mm per minute. The data were analyzed by student t-test. Bond failure interface was determined using the Adhesive Remnant Index (ARI).
Results:
The results showed no statistically significant difference between the mean shear bond strength of specimens bonded with moisture compatible cyanoacrylate (11.90 Mpa) and conventional composite resin (12.60 Mpa). Fishers exact and Mann-Whitney test revealed that ARI scores for teeth bonded using cyanoacrylate significantly lower than for those bonded with conventional composite resin
Conclusions:
This study showed that cyanoacrylate adhesives are suitable for use as a bonding agent in routine orthodontic practice.