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Quantitative bacteriology of endodontic infections
Oral Surgery, Oral Medicine, and Oral Pathology
|February 1, 1980
Summary
A new quantitative culture technique accurately measures bacteria in endodontic samples. This method revealed high bacterial concentrations and mixed flora in nonvital teeth, aiding infection understanding.
Area of Science:
- Microbiology
- Endodontics
- Dental Research
Background:
- Accurate quantification of bacteria in endodontic infections is crucial for effective treatment.
- Existing methods may not fully capture the complex microbial load within root canals.
Purpose of the Study:
- To develop and validate a novel technique for quantitative bacterial culturing of endodontic specimens.
- To determine the bacterial concentration and composition in samples from nonvital teeth.
Main Methods:
- A paper point sampling method was employed, with points placed in saline, vortexed, and serially diluted.
- Quantitative cultures were performed on multiple media, and specimen weight was determined.
- The technique was applied to samples from 10 nonvital teeth.
Main Results:
- The method yielded a mean bacterial concentration of 10(7.7) colony-forming units per gram of sample.
- Nine out of ten specimens exhibited a mixed aerobic-anaerobic bacterial flora.
- An average of five distinct bacterial species per specimen were identified at concentrations above 10(5)/gm.
Conclusions:
- The described technique provides a reliable method for quantitative bacterial assessment in endodontic samples.
- Nonvital teeth harbor substantial and diverse polymicrobial communities, highlighting the complexity of endodontic infections.