Are Desensitizing Toothpastes Equally Biocompatible and Effective Against Microorganisms?

Area of Science:

• Oral Health
• Biomaterials Science
• Microbiology

Background:

• Desensitizing toothpastes aim to alleviate tooth sensitivity.
• Their effects on cellular health, genotoxicity, antimicrobial properties, and enamel surface are crucial for safety and efficacy.
• Comparative analysis with common toothpastes is essential for informed product selection.

Purpose of the Study:

• To evaluate the cytotoxicity, genotoxicity, and antimicrobial activity of three desensitizing toothpastes against a common toothpaste.
• To assess the impact of these toothpastes on tooth enamel surface roughness.

Main Methods:

• Cytotoxicity and genotoxicity assessed using MTT assay and micronucleus test on human fibroblasts.
• Antimicrobial activity tested against Candida albicans, Streptococcus mutans, and Staphylococcus aureus.
• Enamel surface roughness measured after 10,000 brushing cycles on bovine teeth.

Main Results:

• All toothpastes, except Colgate Sensitive, exhibited cytotoxic effects. No genotoxicity was observed across all groups.
• Colgate toothpaste demonstrated superior antimicrobial efficacy compared to desensitizing options, with some unable to eliminate S. aureus.
• Brushing with Colgate Sensitive and Oral B Sensitive increased enamel roughness, but no significant difference was found between desensitizing and common toothpastes.

Conclusions:

• None of the tested toothpastes induced genotoxicity.
• Colgate Sensitive showed no cytotoxicity, while Colgate exhibited the strongest antimicrobial action.
• Desensitizing toothpastes did not significantly alter enamel surface roughness compared to a standard toothpaste.