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  • Title: Salivary immunoglobulin A levels in rapid and slow plaque formers: a pilot study.
    Author: Zee KY, Samaranayake LP, Attström R.
    Journal: Microbios; 2001; 106 Suppl 2():81-7. PubMed ID: 11548203.
    Abstract:
    The aim of this study was to investigate the salivary immunoglobulin A concentration in rapid and slow plaque formers. After 3 days of oral hygiene abstinence, 49 healthy volunteers were screened using the plaque index (PI) to assess their plaque formation rates. Five subjects with the highest, and five with the lowest mean PI were selected as rapid and slow plaque formers, respectively. Unstimulated whole saliva was collected from each of these ten subjects and the levels of salivary IgA assessed using a conventional ELISA technique. Reference curves for salivary IgA were established by testing serial dilutions of human IgA with known concentrations. When the differences between the two groups were compared, almost a twofold increase in the mean salivary IgA concentration in the slow (16 microg/ml +/- 4) compared with the rapid (9 microg/ml +/- 3) plaque formers was recorded (p < 0.05). These findings, reported for the first time, imply that salivary IgA may play a crucial role in regulating the pioneer plaque development on enamel surfaces.
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