ABSTRACT
Background: Tooth discoloration has become a common esthetic problem in recent years. Removal of stains by bleaching is well-documented. Low concentration home bleaching products are available in market in different forms and concentrations. Aim: The aim of this study is to evaluate and compare the efficacy of low concentration commercially available home bleaching products (whitening strip, gel, and mouthwash) in removing stains and whitening the tooth using clinical and digital methods. Materials and Methods: Sixty permanent enamel samples mounted in an acrylic block were artificially stained and randomly divided into four groups. Negative control, 15 % Carbamide peroxide gel group, 2% Hydrogen 16 peroxide mouthwash group and 6% Hydrogen peroxide strip group respectively. The samples were bleached with respective agents according to the manufacturer's instructions. The efficacy on 7th and 14th day was evaluated clinically (SGU change), photographically (?E), and using quantitative light-induced fluorescence (?F). The data were analyzed using paired t-test and analysis of variance. Results: Postbleaching, 6% hydrogen peroxide strips and 15% carbamide peroxide gel showed maximum improvement (??F – 15.73 and 11.89, ?E – 19.8 and 18.9, respectively) when compared to 2% hydrogen peroxide mouthwash and negative control group (??F – 9.68 and 6.59, ?E – 15.04 and 9.44, respectively). The difference was statistically significant (P = 0.001). Conclusion: 6% hydrogen peroxide strips and 15% carbamide peroxide gel showed maximum improvement in stain removal and tooth whitening however, the strips showed better efficacy than the gel. Strips have the added advantage of lesser contact period, less salivary dilution, and no gingival contact. Therefore, strips can be a better alternative for gels and mouthwashes.
ABSTRACT
Eruption of first primary teeth is the most anxiously awaited developmental milestone in a child. However, primary teeth have shown wide variations in their eruption time among different population, ethnic, and racial groups. Aims: The present study was conducted with the aim to evaluate the time and sequence of eruption of primary teeth of children of Mysore. Settings and Design: A cross-sectional study design included 1392 participants aged 3 months to 36 months recruited by simple random sampling method. The variables such as age, gender, and number of erupted primary teeth were recorded. Subjects and Methods: Clinical examination was done under natural illumination. A tooth was considered erupted when any part of its crown had penetrated the gingiva and was visible in the oral cavity. Statistical Analysis Used: Probit regression analysis was performed to obtain the mean and median age of eruption of teeth. The significance of difference in the mean age of eruption across gender and arch was determined using paired t-test. Results and Conclusion: The first primary tooth to erupt was mandibular central incisor at 10.24 ± 2.47 months followed by maxillary central incisor at 11.06 ± 2.65 months. The duration of primary teeth eruption was 17.89 and 18.32 months in males, 18.54 months and 18.32 months in females for maxilla and mandible, respectively. Eruption of primary tooth is delayed among children of Mysore as compared to standard eruption chart. The results will provide information to health professional about contemporary tooth eruption time derived from an Indian population.