Effect of Adhesion Boosters on the Shear Bond Strength of New Brackets Bonded to a Debonded Tooth Surface - An Study.

CONTEXT

Effect of adhesion boosters on shear bond strength of orthodontic brackets.

AIM

The aim is to evaluate the shear bond strength and adhesive remnant index (ARI) score of new brackets bonded to a debonded tooth surface with and without the use of adhesion boosters.

SETTINGS AND DESIGNS

comparative study.

MATERIALS AND METHODS

Adhesion boosters: Enhance LC (Reliance, Itasca III) All Bond 2 (Bisco, Schaumsburg) and the Composite adhesives Transbond XT (3M UNITEK) Enlight (ORMCO) were used in this study. One hundred and eight extracted maxillary first premolar teeth were bonded with light cure composite to etched tooth surface. The brackets were then debonded with debonding pliers after 1 week and it was polished with low speed tungston carbide bur and rubber cup. The teeth were divided into six groups and they were etched, washed, and dried again. New brackets were rebonded to the tooth surface using composites with or without adhesion boosters. Then, the shear bond strength value was calculated for each bracket with a universal testing machine. ARI scores were also evaluated.

STATISTICAL ANALYSIS USED

One-way ANOVA and least significant difference test was used for the association between variables. Probability value ( < 0.05) was considered statistically significant.

RESULTS

The results showed a statistically significant difference between the groups with a < 0.001. There was no significant difference in ARI scores between the groups ( = 0.15).

CONCLUSIONS

Both the adhesion boosters significantly improved the shear bond strength of orthodontic brackets. There was no statistically significant difference in the ARI scores.