A New Premixed Self-Etch Adhesive for Bonding Orthodontic Brackets

Abstract

Objective: To determine if a new premixed self-etch adhesive can be used to successfully bond orthodontic brackets to enamel. Materials and Methods: Forty human molars were cleaned, mounted, and randomly divided into two groups. In group 1, 20 teeth were conditioned using the self-etching primer Transbond Plus (3M Unitek, Monrovia, Calif). In group 2, 20 teeth were conditioned using a new premixed selfetching adhesive, AdheSE One (Ivoclar Vivadent Inc, Amherst, NY). Both groups were bonded using brackets precoated with a composite adhesive. The teeth were debonded within half an hour following initial bonding using a universal testing machine. After debonding, the enamel surface was examined under 10ϫ magnifications to determine the amount of residual adhesive remaining on the tooth. A Student's t-test was used to compare the shear bond strength (SBS) of the two groups, and the Chi-square test was used to compare the adhesive remnant index (ARI) scores for the two adhesive systems. Results:The mean SBS of the brackets bonded to the teeth using AdhesSE One was 3.6 Ϯ 1.3 MPa and was significantly lower (t ϭ 2.80, P ϭ .01) than the SBS of the brackets bonded using Transbond Plus (x ϭ 5.9 Ϯ 3.2 MPa). The comparisons of the ARI scores between the two groups ( 2 ϭ 19.26) indicated that bracket failure mode was also significantly different (P Ͻ .001), with more adhesive remaining on the teeth bonded using Transbond Plus. Conclusions: The SBS of the new premixed self-etching adhesive needs to be increased for it to be successfully used for bonding orthodontic brackets.

A comparison of shear bond strength of orthodontic brackets bonded with four different orthodontic adhesives

“…[181920] The bond strength of the orthodontic bracket must be able to withstand the forces applied during the orthodontic treatment. In orthodontics, an adequate bond, which fails at the enamel-composite interface, would be desirable because debonding and subsequent polishing would become much easier.…”

Shear bond strengths of seven self-etching primers after thermo-cycling

“…Einige Autoren fanden aber auch verminderte Haftwerte [5,14,26,30]. Für andere selbstätzende Primer bestehen deutlich weniger und kontroverse Daten zu deren Eignung auf unbehandelten Schmelzoberflä-chen [3,6,35,42,43].…”

The effect of tooth bleaching on the shear bond strength of orthodontic brackets using self-etching primer systems

“…In late 2000, a new SEP was developed particularly for orthodontic bonding. 10,11 Reports are controversial about the shear bond strengths of brackets after bleaching. Authors have generally reported that mean shear bond strength of orthodontic brackets with bleached enamel is significantly lower than that with unbleached enamel corresponding to the bleaching type or waiting period after the bleaching procedure.…”