Effect of human whole saliva on the <i>in vitro</i> adhesion of <i>Candida albicans</i> to a denture base acrylic resin: a focus on collection and preparation of saliva samples
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Data
2012
Autores
Zamperini, Camila A.
Schiavinato, Patricia C. S.
Pavarina, Ana C.
Giampaolo, Eunice T.
Vergani, Carlos E.
Machado, Ana Lucia [UNESP]
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Resumo
Objective In studies on Candida albicans adhesion to surfaces, diverse protocols have been used for collection and preparation of saliva samples. Thus, this study investigated whether variations in the centrifugation parameters and number of donors of saliva would influence the adhesion of C. albicans to a denture base resin. Methods Resin acrylic samples (n = 72) were made and then divided into four groups: (a) control – specimens were left without preconditioning in saliva; (b) three experimental groups, in which the specimens were preconditioned with saliva collected from 15 volunteers and centrifuged at 12 000 g for 5 min (G1); from 15 volunteers and centrifuged at 18 000 g for 30 min (G2); and from one volunteer and centrifuged at 12 000 g for 5 min (G3). Candida adhesion was evaluated by both the 2,3-bis(2-methoxy-4-nitro-5-sulfophenyl)-5-[(phenylamino) carbonyl]-2H-tetrazolium hydroxide (XTT) reduction method and crystal violet staining. Data were analyzed by one-way analyses of variance (P = 0.05). Results For XTT reduction assay, groups G2, G3, and control were not significantly different, whereas group G1 showed significantly higher absorbance value than control. For crystal violet staining there were no significant differences among all groups. Conclusion Variations in the centrifugation parameters and number of donors of saliva may influence C. albicans adhesion to denture base resins.
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acrylic resins, adhesion, biofilms, Candida albicans, saliva
Como citar
Journal of Investigative and Clinical Dentistry, v. 4, n. 4, p. 225-228, 2012.