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Evaluation of extrinsic tooth discoloration
Acta Odontologica Scandinavica
|January 1, 1979
Summary
Benzethonium chloride, an antibacterial agent, causes extrinsic brown tooth discoloration when added to toothpaste. This staining effect was confirmed using multiple evaluation methods.
Area of Science:
- Dental hygiene
- Material science
Background:
- Extrinsic tooth discoloration is a common concern linked to chemical plaque control agents.
- Antibacterial agents, particularly quaternary ammonium salts, are frequently implicated in tooth staining.
Purpose of the Study:
- To investigate the staining potential of benzethonium chloride, an antibacterial agent, as a 2% additive in dentifrice.
- To assess the influence of a weak chelator on the discoloration tendency caused by benzethonium chloride.
Main Methods:
- The study utilized benzethonium chloride as a 2% additive in a dentifrice formulation.
- Discoloration was evaluated using direct visual inspection, color photography, and microphotometry.
- A weak chelator was incorporated to determine its effect on staining.
Main Results:
- The investigation confirmed the significant staining ability of benzethonium chloride in dentifrice.
- The presence of a weak chelator did not modify the discoloration tendency.
- All three evaluation methods (direct inspection, photography, microphotometry) effectively demonstrated the staining potential.
Conclusions:
- Benzethonium chloride is confirmed to cause extrinsic brown tooth discoloration.
- Color photography is recommended for epidemiological surveys, while microphotometry is suitable for detailed experimental studies on tooth discoloration.