Document Type: Original Article(s)
Associate Professor, Dental Materials Research Center and Department of Operative Dentistry, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
General Dentist, Department of Operative Dentistry, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Associate Professor, Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
High School Student, Emam Hussein Institute, Mashhad, Iran
BACKGROUND AND AIM: The aim of this study was to evaluate the effectiveness of different whitening toothpastes, focusing on the experimental ozonated toothpaste. MATERIALS AND METHODS: This laboratory study included a sample of 48 sound human molar teeth. Teeth were randomly assigned into four groups according to toothpaste treatment to be evaluated objectively (colorimetric method) and subjectively (visual assessment) (n = 12). Group I: Ozonated toothpaste (experimental); Group II: Non-ozonated toothpaste (experimental); Group III: Aqua fresh whitening triple protection; and Group IV: Nasim (toothpaste without a chemical whitening agent). After tea staining and color assessment, the teeth were subjected to a tooth brushing regime as for 6 weeks, done twice a day, 2 min each time (total: 168 min). Next, color changes were determined after brushing by instrumental and visual methods. RESULTS: Analysis of variance and the Tukey tests were used for evaluating statistical data (α = 0.05). Color change by instrumental index showed that ozonated and aquafresh toothpastes increased teeth whitening; however, the amount color change was not significant (P > 0.050). With visual assessment there was a significant difference between mean color change among the four groups (P = 0.008). CONCLUSIONS: Ozonated toothpaste caused significant whitening changes in discolored teeth from a clinical point of view by visual assessment.