Erosive cola-based drinks affect the bonding to enamel surface: an in vitro study

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Restorative Dentistry

Background:

• Dental erosion from acidic beverages is a growing concern.
• Understanding the impact of cola consumption on dental restorative material bonding is crucial for clinical practice.
• Previous studies have explored erosive effects, but the combined impact with toothbrushing on enamel bonding requires further investigation.

Purpose of the Study:

• To evaluate the effect of in vitro erosion caused by different cola drinks on the bond strength to enamel.
• To assess the influence of subsequent toothbrushing on the bond strength after erosion.
• To analyze the interface integrity and hybrid layer formation under different erosive conditions.

Main Methods:

• Bovine enamel specimens were subjected to in vitro erosion using Regular Coke, Light Coke, and Zero Coke.
• Eroded specimens were either tested directly or after 1-minute of simulated toothbrushing.
• Bond strength was measured using a microtensile test, and interfaces were examined with Confocal Laser Scanning Microscopy (CLSM).

Main Results:

• All tested cola drinks significantly reduced enamel bond strength.
• Toothbrushing did not significantly alter the bond strength after erosion.
• CLSM revealed irregular hybrid layer formation in specimens eroded by Regular Coke and Light Coke, but not Zero Coke.

Conclusions:

• Cola-based drinks negatively impact the bond strength of restorative materials to enamel.
• Zero Coke demonstrated a comparatively lower detrimental effect on bond strength and hybrid layer formation.
• The findings highlight the importance of considering beverage acidity in restorative dentistry, with implications for patient recommendations.