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Correlation between Streptococci Mutans and salivary IgA in relation to some oral parameters in saliva of children

Authors: Lamia I. Sood --- Minan Y. H. Al-Ezzy --- Ameena R. Diajil
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2014 Volume: 26 Issue: 1 Pages: 71-79
Publisher: Baghdad University جامعة بغداد


Background: Saliva plays an important role in oral health. Several salivary proteins are involved in the antimicrobialdefence mechanism and are able to eliminate or inhibit bacterial growth in the oral cavity. Secretory IgA (SIgA) isone of the principal antibodies present in saliva, could help oral immunity by preventing microbial adherence,neutralizing enzymes and toxins.The aim of this study was to investigate the relationship between salivary Streptococcus Mutans (SM) count and S IgAin stimulated whole saliva in children with primary dentition compared to those with permanent teeth in relation tosome oral hygiene parameters.Material and methods: Stimulated whole saliva was collected from 50 children (25 with primary dentation and 25 withpermanent teeth). Salivary flow rate and pH was measured. Oral hygiene index (OHI) and gingival inflammation wasassessed using classical method. S IgA level was measured using an immunoassay kit and SM count was determinedby culture media.Results: Mean salivary flow rate, pH and S IgA were significantly higher among children with permanent teethcompared to those with primary dentition.Compared to primary dentition, permanent dentition was associated with a significantly reduced mean plaqueindex, increased mean gingival index and reduced mean salivary SM count.Although plaque index showed a statistically significant positive correlation with SM count, gingival index showed aweak negative correlation with bacterial count.S IgA, PH and flow rate showed a statistically significant moderately strong negative correlation with bacterial count.Conclusion: This study showed a clear correlation between count of SM in stimulated whole saliva and both SIgA andplaque index

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