Microbiological diagnostics in periodontics.

Microbiological tests in periodontics can be of great help in determining the characteristics of a pathogenic infection, prescribing the optimal antibiotic regimen, and monitoring the effectiveness of treatment. However, they are not without potential pitfalls. Current microbiological tests vary considerably in sensitivity and specificity. A false-positive test result may lead to unnecessary therapy and patient distress. A false-negative test result may prompt the withholding of necessary therapy and the subsequent progression of disease. Also, diagnostic tests can be relatively expensive and uncomfortable for patients. This article attempts to determine the usefulness of various microbiological testing systems for the management of periodontitis patients.