Furfurals in chlorhexidine-discolored pellicle

Area of Science:

• Oral Biology
• Biochemistry
• Analytical Chemistry

Background:

• Chlorhexidine-based mouthwashes are widely used for oral hygiene.
• These rinses can cause intrinsic tooth discoloration, particularly affecting dental pellicle.
• The chemical compounds responsible for chlorhexidine-induced discoloration are not fully understood.

Purpose of the Study:

• To investigate the presence of furans, specifically furfurals, in dental pellicle discolored by chlorhexidine.
• To identify the chemical nature of compounds contributing to chlorhexidine-induced tooth staining.

Main Methods:

• Collection of pellicle material scraped from human teeth.
• Acid hydrolysis of pellicle using sulfuric acid.
• Extraction of hydrolysate with ether.
• Analysis using thin-layer chromatography (TLC) and gas chromatography-mass spectrometry (GC-MS).

Main Results:

• Confirmed the presence of furaldehyde in chlorhexidine-discolored pellicle.
• Thin-layer chromatography indicated the potential presence of hydroxymethyl furfuraldehyde.

Conclusions:

• Furfurals, such as furaldehyde, are present in chlorhexidine-discolored dental pellicle.
• These findings provide insight into the chemical mechanisms underlying chlorhexidine-induced tooth discoloration.