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  • Title: Comparative study of subgingival microbiological sampling techniques.
    Author: Renvert S, Wikström M, Helmersson M, Dahlén G, Claffey N.
    Journal: J Periodontol; 1992 Oct; 63(10):797-801. PubMed ID: 1328591.
    Abstract:
    The presence of specific bacteria in subgingival plaque has been used as an indicator of active periodontal disease. The technique of subgingival sampling may conjecturally influence the identification and enumeration of microorganisms reported. In this study, paper point sampling and scaler sampling are compared. Subgingival samples using both methods were taken from three surfaces in each of 12 patients at the following time points: at each of two appointments one week apart before treatment and at each of two appointments 12 and 13 weeks following treatment. Microbiological analyses were undertaken to determine the total number of colony forming units, the proportions of suspected periodontal pathogens, and the number of spirochetes using phase contrast microscopy. Significantly higher numbers of colony forming units and spirochetes were found for paper point sampling both before and after treatment.
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