Comparative Evaluation of Microleakage below the Orthodontic Brackets after Bonding with Various Adhesive Agents: An In Vitro Study.

Abstract

The aim of the current study was to assess the microleakage below orthodontic brackets after bonding with three different adhesive materials. In total, 75 healthy human premolars that had been extracted for orthodontic treatment were utilized in this investigation. The samples were divided into three groups of 25 samples randomly. Premolar brackets with stainless steel bondable 0.022 slot pre-adjusted edgewise appliances were utilized. Group I: Brackets bonded with Nanocomposite Filtek Z350 XT, group II: brackets bonded with Transbond XT, group III: brackets bonded with resin-reinforced glass ionomer cement-GC Fuji Ortho LC. A surveyor applied a 200 g weight to each bracket, making minor adjustments to ensure the adhesive thickness was consistent. Thermocycling was then carried out for 1000 cycles at 5 ± 2°C to 55 ± 2°C with a dwell time of 30 s and a transfer time of 5 s. The samples were incubated in a 0.5% basic fuchsine solution for a day. Every sample was inspected using a stereomicroscope with a ×16 magnification. The data were collected and analyzed. The least microleakage was found in Transbond XT adhesive group (1.84 ± 0.12), followed by Filtek Z350 XT (1.96 ± 0.08) and GC Fuji Ortho LC (2.44 ± 0.10) group. There was a highly significant difference between the different adhesive agent groups. There was a statistically significant difference found between Filtek Z350 XT vs GC Fuji Ortho LC and Transbond XT vs GC Fuji Ortho LC with a mean difference of -0.48 and 0.60, respectively. However, there was no significant difference between Filtek Z350 XT vs Transbond XT with a mean difference of 0.12. Within the limitation, the present study concluded that the Transbond XT showed better adhesive properties and least microleakage compared with Filtek Z350 XT and GC Fuji Ortho LC. There are many undesirable side effects of orthodontic therapy, including cavities, demineralization, and discoloration of the enamel. Unpleasant "white-spot lesions" or secondary caries under and around the brackets can result from microleakage between the adhesive and the base of the orthodontic bracket as well as between the adhesive and the enamel. How to cite this article: Singh S, Brajendu, Haque I, et al. Comparative Evaluation of Microleakage below the Orthodontic Brackets after Bonding with Various Adhesive Agents: An In Vitro Study. J Contemp Dent Pract 2024;25(8):722-725.