Clinical enamel surface changes following an intra-oral acidic challenge

Area of Science:

• Dental research
• Oral health
• Biomaterials science

Background:

• Dental enamel erosion is a growing concern linked to modern diets.
• Understanding the timeline of enamel repair after acid attack is crucial for preventing tooth wear.

Purpose of the Study:

• To investigate early enamel erosion and repair using replica impressions.
• To compare enamel surface topography changes in vivo over 24 hours post-acid challenge.

Main Methods:

• A clinical study involving 20 healthy subjects.
• Dental replica impressions taken at baseline and at 2, 4, 7, and 24 hours after consuming an acidic soft drink.
• Scanning electron microscopy and descriptive analysis of surface topography.

Main Results:

• Enamel erosion was observed immediately after acid challenge.
• Reparative changes were evident starting at 2 hours and significantly progressed by 4-24 hours.
• No significant difference in tooth surface characteristics was found between baseline and 24-hour replicas.

Conclusions:

• The methodology accurately tracked enamel erosion and repair progression over 24 hours.
• Enamel repair initiates within 2 hours and is substantially complete within 4-24 hours post-acid challenge.
• A 4-24 hour interval between acidic challenges is recommended to allow for enamel recovery.