The aim of this study is to investigate epidemiology and treatment possibilities of black stains, with the assessment of a possible correlation with patients' dietary habits. Patients will be randomly divided into three groups. For each group, clinical evaluation will be performed at the study begin, after 2 and after 6 months. At the study begin, evaluation of black stains with Gasparetto's classification will be assessed; then professional oral hygiene with ultrasonic scaler will be performed, plus glycine and polish; then, products for home oral care will be given to patients, depending on the groups. The clinical situation will be re-evaluated after 2 and after 6 months. Home oral care will be performed with different products, containing lactoferrin (group 1) and probiotics (group 2). The control group (Group 3) will use normal products.
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Change in the extension of black stains (Gasparetto et al., 2003)
Timeframe: Study begin, 2 and 6 months.