In situ evaluation of different remineralization periods to decrease brushing abrasion of demineralized enamel

Area of Science:

• Dental Science
• Biomaterials Science
• Surface Science

Background:

• Dental enamel demineralization increases susceptibility to toothbrushing abrasion.
• Intraoral remineralization may restore enamel's resistance to wear.
• Understanding optimal remineralization timing is crucial for preventing dental erosion.

Purpose of the Study:

• To evaluate the impact of varying intraoral remineralization durations on demineralized enamel's resistance to toothbrushing abrasion.
• To determine the minimum remineralization period required to enhance enamel's protective qualities against mechanical wear.

Main Methods:

• Human enamel specimens were subjected to repeated demineralization in an acidic beverage.
• Specimens underwent intraoral remineralization for different time periods (0-60 minutes) over 21 days.
• Enamel wear was quantified using laser profilometry after simulated toothbrushing.

Main Results:

• Abrasion resistance of softened enamel significantly increased with longer remineralization periods.
• Even 60 minutes of intraoral remineralization resulted in significantly higher wear compared to non-brushed controls.
• A clear correlation was observed between remineralization duration and reduced enamel wear.

Conclusions:

• Enamel's resistance to abrasive wear is enhanced by intraoral remineralization.
• A minimum waiting period of 60 minutes is recommended before toothbrushing following an erosive challenge to minimize enamel loss.