Extrinsic discoloration of teeth

Area of Science:

• Oral health
• Biochemistry
• Dental hygiene

Background:

• Most tooth discolorations are extrinsic, presenting as brown stains.
• Factors like smoking, diet (tea/coffee), aging, and specific mouthrinses contribute to these stains.
• The acquired pellicle's chemical alteration is implicated in extrinsic discoloration formation.

Purpose of the Study:

• To summarize the understanding of extrinsic tooth discoloration.
• To identify key contributing factors and the underlying mechanism.

Main Methods:

• Review of clinical indices used for evaluating extrinsic discoloration.
• Analysis of photometric techniques for discoloration assessment.
• Examination of factors promoting extrinsic discoloration.
• Investigation into the chemical basis of brown integuments.

Main Results:

• Extrinsic tooth discoloration is predominantly brown.
• Smoking, tea/coffee, age, and antibacterial mouthrinses are significant contributing factors.
• Chemical alteration of the acquired pellicle is identified as the primary cause of brown integuments.

Conclusions:

• Extrinsic tooth discoloration is a common issue driven by lifestyle and oral hygiene products.
• Understanding the chemical alteration of the acquired pellicle is key to managing extrinsic tooth stains.