Microbiological predictors of caries risk

Area of Science:

• Oral microbiology
• Dental public health
• Diagnostic test evaluation

Background:

• Dental caries prediction remains a significant challenge in oral health.
• Current diagnostic tests for caries risk are limited in their acceptance and application.
• Focus has shifted towards microbiological markers like lactobacilli (L) and mutans streptococci (MS).

Purpose of the Study:

• To evaluate the effectiveness of L and MS counts as predictors of dental caries risk.
• To assess the potential of these bacterial counts as indicators of carbohydrate consumption.
• To explore factors influencing the accuracy and application of microbiological caries risk prediction.

Main Methods:

• Review of studies assessing sensitivity, specificity, and predictive values of L and MS counts.
• Analysis of various influencing factors: caries increment, age, evaluation methods, sample type (saliva/plaque), sampling frequency, growth media, and simplified enumeration techniques.
• Consideration of multivariate approaches combining microbiological data with clinical and salivary factors.

Main Results:

• L and MS counts are not reliable for predicting individual caries risk.
• Prediction of caries risk for groups, particularly identifying low-risk populations, shows more promise.
• Test results are influenced by numerous variables including sample type, enumeration methods, and caries experience.

Conclusions:

• Microbiological predictors like L and MS counts have limitations for individual caries risk assessment.
• Group-level risk prediction and identification of low-risk subjects are more feasible.
• Multivariate approaches integrating microbiological, clinical, and salivary factors are recommended for improved caries risk prediction.