# Effects of different remineralization agents on shear bond strength of orthodontic brackets: in vitro study

## TL;DR

This study tested how three dental treatments affect the strength of orthodontic brackets, finding no significant impact on bond strength.

## Contribution

The study provides evidence that specific remineralization agents do not compromise orthodontic bracket bond strength.

## Key findings

- No significant differences in shear bond strength were found among the tested remineralization agents and control group.
- Application of the agents at 1, 15, or 30 days did not affect bracket bond strength.
- Adhesive remnant index scores also showed no significant differences between groups.

## Abstract

The aim of this study was to evaluate the effect of different remineralization agents-Proshield Fluoride Varnish (FV), GC MI Varnish (MI), and ROCS Medical Mineral Gel (ROCS MMG)-on the shear bond strength (SBS) of orthodontic brackets after application at various time intervals.

A total of 120 human premolar teeth were divided into 10 groups (n = 12). The experimental groups received different remineralization agents (FV, MI, ROCS MMG) at time intervals of 1, 15, and 30 days, while the control group received no application. The enamel surfaces were etched, and metal orthodontic brackets were bonded using a light-cured composite adhesive. SBS was measured using a universal testing machine, and adhesive remnant index (ARI) scores were assessed after bracket debonding.

No statistically significant differences were observed in SBS among all experimental groups and the control group (P = 0.307). SBS values for the FV, MI, and ROCS MMG groups did not differ significantly at the 1, 15, or 30-day intervals. ARI scores also showed no significant differences between groups (P = 0.370).

The application of Proshield Fluoride Varnish, GC MI Varnish, and ROCS Medical Mineral Gel at different time intervals did not affect the shear bond strength of orthodontic brackets. These remineralization agents can be safely used to prevent white spot lesions and caries before orthodontic treatment at time intervals of 1, 15, and 30 days without compromising bond strength.

Proshield FV, GC MI Varnish, and ROCS MMG safely prevent white spot lesions and caries without affecting bracket bond strength.