Abstract
Abstract Objective The Primekote® (TP) polymer was incorporated to the of Orthodontic Bracket mesh base to improve bond strength and make it more efficient. The purpose of this study was to assess the shear bond strength and adhesive remnant index (ARI) of these brackets. Material and method The test sample consisted of thirty bovine incisors divided into 2 groups: with a group with TP® brackets (n=15), and a control group with Morelli® brackets (n=15) without Primekote® technology. The TransbondTM XT was used as adhesive system in both groups, following the same protocol and manufacturer’s instructions. Specimens were stored in distilled water for 24 hours and then submitted to shear bond strength test in a universal testing machine (EMIC DL2000). The assessment of ARI was performed under stereomicroscope by two calibrated examiners. Result No significant differences (p>0.05) in shear bond strength were found between the two groups according to the independent t-test. The Wilcoxon test was used to assess ARI data and statistical difference was found between Morelli® and TP® Nu-Edge brackets; the last one left less remaining adhesive on tooth surface. Conclusion TP® brackets had higher adherence to the adhesive system as shown by lower ARI scores, but this does not improve its clinical performance.
Highlights
The acid-etching technique developed by Buonocore was a breakthrough that led to several changes in Dentistry, in Orthodontics
This is because this technique makes it possible to directly bond brackets to the enamel in a simple, fast and safe manner[1,2]. This has contributed to the popularization of the technique, which has become the first choice for placement of orthodontic appliances[3]
Once bonded to teeth surface, and provided that orthodontic accessories are in the ideal position, such accessories should remain in their places throughout the orthodontic treatment in order to optimize the time and results
Summary
The acid-etching technique developed by Buonocore was a breakthrough that led to several changes in Dentistry, in Orthodontics. This is because this technique makes it possible to directly bond brackets to the enamel in a simple, fast and safe manner[1,2]. The direct bonding technique is still under development[4] and has limitations One of such limitations is the common unwanted detachment of accessories, a disadvantage that requires time-consuming clinical procedures for removing the remaining adhesive, and carrying out prophylaxis, surface preparation and rebonding[5].
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