The Study Aims to Compare the Effectiveness of Mesoporous Bioactive Glass-containing Adhesives vs Conventional Universal Adhesives on the Clinical Performance Composite Restorations Through Promoting Dentin Remineralization After Selective Caries Removal Over a Two-year Follow-up

"A bioactive glass adhesive containing mesoporous bioactive glass designed to promote dentin remineralization, manufactured by Mediclus, Korea. It releases calcium and phosphate ions to enhance dentin sealing and reduce hypersensitivity~The adhesive will be applied after selective caries removal following a standardized protocol:~Selective enamel etching with 37% phosphoric acid for 15 seconds.~Application of HI Bond Universal adhesive with agitation for 20 seconds.~Light curing for 20 seconds using a LED curing device.~Incremental application of a nano-hybrid composite (Optishade Universal Kerr Dental, USA).~Occlusal adjustment, finishing, and polishing."

"conventional universal adhesive designed for bonding composite restorations to enamel and dentin.~The adhesive will be applied after selective caries removal following a standardized protocol:~Selective enamel etching with 37% phosphoric acid for 15 seconds.~Application of OptiBond Universal adhesive with agitation for 20 seconds.~Light curing for 20 seconds using a LED curing device.~Incremental application of a nano-hybrid composite (Optishade Universal Kerr Dental, USA).~Occlusal adjustment, finishing, and polishing."