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Bacteria in experimentally infected cavity preparations.
Scandinavian Journal of Dental Research
|November 1, 1977
Summary
Vital dentin shows strong resistance to bacterial infection, even when exposed for extended periods. Cavity sterilization methods may offer questionable benefits in preventing bacterial presence in dental restorations.
Area of Science:
- Dental research
- Microbiology
- Histology
Background:
- Bacterial presence in dental cavities is a concern for restoration longevity.
- Understanding dentin's natural resistance is crucial for effective cavity management.
Purpose of the Study:
- To assess bacterial presence in experimental monkey tooth cavities.
- To evaluate the efficacy of different restorative materials and the necessity of cavity sterilization.
Main Methods:
- Experimental infection of monkey teeth with carious dentin or gutta-percha.
- Histological evaluation of bacterial presence in cavities restored with zinc oxide-eugenol, Ca(OH)2, or amalgam.
- Assessment after 82 days of exposure.
Main Results:
- Bacteria were consistently found in cavities with remaining soft carious dentin.
- Bacteria were rarely or not detected in cavities restored with zinc oxide-eugenol, Ca(OH)2, or amalgam.
- Vital dentin demonstrated significant resistance to bacterial invasion.
Conclusions:
- Vital dentin possesses inherent resistance to infection.
- Routine cavity sterilization may not be essential for successful dental restorations.
- Further research into dentin's protective mechanisms is warranted.