Enamel Remineralization with Novel Bioactive Glass Air Abrasion

Area of Science:

• Biomaterials Science
• Dental Materials
• Cariology

Background:

• White spot lesions (WSLs) are common during orthodontic treatment.
• Remineralization is key to managing enamel demineralization.
• Novel bioactive glasses offer potential for enamel repair.

Purpose of the Study:

• To evaluate the remineralization efficacy of a new fluoride-containing bioactive glass (QMAT3).
• To compare QMAT3 with Sylc glass and artificial saliva for treating artificial WSLs.
• To assess changes in enamel surface properties and mineral composition.

Main Methods:

• Thirty extracted human premolars with induced WSLs were treated with QMAT3, Sylc glass, or artificial saliva.
• Optical coherence tomography and noncontact profilometry assessed enamel states.
• Knoop hardness testing, SEM, EDX, and 19F MAS-NMR analyzed surface changes and mineral content.

Main Results:

• QMAT3 treatment resulted in significant enamel remineralization, with surface properties similar to sound enamel.
• SEM/EDX revealed mineral deposits (Ca, P, F) forming a protective layer on QMAT3-treated enamel.
• 19F MAS-NMR confirmed the formation of fluorapatite, a more acid-stable mineral than hydroxyapatite.

Conclusions:

• QMAT3 demonstrates significant potential for remineralizing white spot lesions in orthodontics.
• The formation of a fluorapatite layer enhances enamel resistance to acid attack.
• Further clinical studies are needed to validate QMAT3's efficacy and refine its application.