Examinando por Materia "Dental bleaching"

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  • Miniatura
    ÍtemAcceso abierto
    Degrees of staining in dental structures subjected to different types of dental clearing at 48 hours. In vitro study
    (Universidad Privada Norbert Wiener, 2021-12-09) Cotrina Vasquez, Luis Alberto; Morante Maturana, Sara Angelica
    Dental discoloration has been a longstanding concern for many individuals. However, various methods and agents, such as hydrogen peroxide (HP) and carbamide peroxide (CP), applied either at home or in a dental office, have emerged in dental practice to improve aesthetics. It is essential to consider how these applications may have positive or negative effects on patients. This study aimed to determine the degree of staining in dental structures subjected to different types of dental bleaching over 48 hours. The research was experimental, in vitro, and prospective. The study used 10% carbamide peroxide (CP10), 22% carbamide peroxide (CP22), 35% hydrogen peroxide (HP35), and a control group (CG) not exposed to any bleaching agent, totaling 40 experimental samples (n = 40) divided into groups of 10 test bodies each. The degree of staining in dental structures subjected to different types of bleaching was assessed using a Vita EasyShade Advance 4.0 spectrophotometer over 48 hours. Conclusions: Dental structures exposed to 10% carbamide peroxide exhibited the highest degree of staining, with darker coloration compared to the initial baseline prior to bleaching. Structures exposed to 22% carbamide peroxide showed the lowest degree of staining, retaining a lighter tone compared to the initial baseline. Structures treated with hydrogen peroxide exhibited a moderate degree of staining, with a slightly duller coloration compared to their initial and final color measurements.
  • Miniatura
    ÍtemAcceso abierto
    Pigmentation of teeth by immersion in artificial chicha morada after whitening with 35% hydrogen peroxide
    (Universidad Privada Norbert Wiener, 2021-07-05) Ibarra Costas, Robert Virgilio; Girano Castaños, Jorge Alberto
    Objective: To determine the pigmentation of dental pieces immersed in artificial chicha morada after bleaching with 35% hydrogen peroxide. Materials and Methods: This study was experimental, prospective, longitudinal, and descriptive. The sample consisted of 48 extracted human teeth meeting the inclusion and exclusion criteria. The sample size was determined using the formula for estimating proportions for a finite population (FISTERRA formula for quantitative variables). Each tooth underwent a bleaching process with 35% hydrogen peroxide, followed by immersion in artificial chicha morada for 30 minutes over 28 days. A database of color changes was created using a spectrophotometer. Results: In the control group (immersed in distilled water), the average luminosity range decreased from 88.30 to 83.41 over the bleaching and 28-day treatment period. In the treated group (immersed in artificial chicha morada), the average luminosity range decreased from 89.30 to 83.87 during the same period. Conclusions: A decreasing trend in luminosity was observed in both groups. The decrease occurred earlier in the treated group; however, by the end of the study, the control group reached similar luminosity levels as the treated group. The differences between the two groups were not statistically significant.