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      Comparación Espectrofotométrica de las Sesiones de Blanqueamiento Intracameral con Peróxido de Hidrógeno y Carbamida a Diferentes Concentraciones Translated title: Spectrophotometric Comparison of Intracameral Tooth-Bleaching Sessions Using Hydrogen Peroxide, and Carbamide Peroxide at Different Concentrations

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          Abstract

          RESUMEN: El objetivo del presente trabajo fue comparar espectrofotométricamente el número de sesiones para un cambio efectivo de coloración con peróxido de carbamida al 100 %, 37 % y peróxido de hidrógeno al 35 %, a través de la técnica Walking Bleach. Este fue un estudio experimental, in vitro, en paralelo, con ciego en la medición del efecto y en el análisis de datos. Se utilizaron 88 premolares extraídos por indicación ortodóncica. Estos fueron tratados endodónticamente y artificialmente pigmentados con cromógenos derivados de productos de descomposición de la sangre. Se dividieron aleatoriamente en 4 grupos de 22 dientes (un grupo por cada agente blanqueador, más un grupo control con agua destilada). El régimen de tratamiento para cada grupo fue de 4 sesiones existiendo una separación de 4 días entre cada una. El registro de color previo (baseline) y posterior a cada aplicación fue realizado mediante el espectrofotómetro dental Vita Easyshade V, con el cual se registraron los colores en espacio de color CIE L*a*b*. Se calcularon posteriormente los valores de la variación total de color (DE) entre los parámetros iniciales y los distintos tiempos de evaluación. El análisis de significancia se realizó mediante la prueba Kruskal-Wallis y para comparar las diferencias se usó el test de comparaciones múltiples por pares mediante el procedimiento de Steel-Dwass-Critchlow-Fligner, registrando diferencias estadísticamente significativas en la variación total del color desde la primera sesión de blanqueamiento. En conclusión, utilizando peróxido de carbamida al 100 %, la técnica Walking Bleach no requiere un menor número de sesiones para un cambio efectivo de coloración al compararlo con peróxido de hidrógeno al 35 %, pero si con relación al peróxido de carbamida al 37 %, donde el objetivo se consigue en un menor número de sesiones.

          Translated abstract

          ABSTRACT: The objective of this study was to spectrophotometrically compare the number of sessions for an effective color change using 100 % and 37 % carbamide peroxide, and 35 % hydrogen peroxide, applying the Walking Bleach technique. This was an experimental study, performed in vitro, in parallel, and was a blind study in relation to the measurement of the effect and the analysis of data. 88 premolars extracted by orthodontics indications were used. These were endodontically treated and artificially pigmented with chromogens derived from blood decomposition products. They were randomly divided into 4 groups of 22 teeth (one group for each whitening agent, plus a control group with distilled water). The treatment regime for each group was 4 sessions, with a separation of 4 days between each session. The registration of color before (baseline) and after each application was done using the dental spectrophotometer Vita Easyshade V, with which the colors were registered in the CIE L*a*b* color space. The values of total color variation (DE) were later calculated between the initial parameters and the different stages of evaluation. Significance testing was undertaken using Kruskal-Wallis and to compare the differences the method used was Steel-Dwass-Critchlow- Fligner, registering significant statistical differences in the total color variation from the first bleaching session. In conclusion, using 100 % carbamide peroxide, the Walking Bleach technique does not require fewer sessions for an effective change in coloration when compared to 35 % hydrogen peroxide, however, it does using 37 % carbamide peroxide, where the result is achieved in a lower number of sessions.

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          Most cited references22

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          Dental color matching instruments and systems. Review of clinical and research aspects.

          To review current status of hand held systems for tooth color matching in vivo and corresponding research. "Medline" database from 1981 to 2010 were searched electronically with key words tooth, teeth, color and dentistry. Spectrophotometers, colorimeters and imaging systems are useful and relevant tools for tooth color measurement and analysis, and for quality control of color reproduction. Different measurement devices either measure the complete tooth surface providing a "color map" or an "average" color of the limited area [3-5mm] on the tooth surface. These instruments are useful tools in color analysis for direct or indirect restorations, communication for indirect restorations, reproduction and verification of shade. Whenever possible, both instrumental and visual color matching method should be used, as they complement each other and can lead towards predictable esthetic outcome. Copyright © 2010 Elsevier Ltd. All rights reserved.
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            Patients' satisfaction with dental esthetics.

            Esthetics has become an important issue in modern society, as it seems to define one's character. In the past, functional demands were the main consideration in dental treatment. Today, with the decrease in caries prevalence, the focus has shifted toward dental esthetics. The authors conducted a study to evaluate the factors influencing patients' satisfaction with their dental appearance and with the results of esthetic treatment. The authors surveyed a population of 407 adults (mean age, 21 years). They distributed a questionnaire regarding satisfaction with current dental esthetics and previous esthetic treatments. Of the 407 subjects, 152 (37.3 percent) were dissatisfied with their dental appearance. Tooth color was the primary reason for dissatisfaction (133 [89.3 percent] of 149 subjects), followed by poor tooth alignment (36 [23.7 percent] of 152 subjects), although 110 (27 percent) of the 407 subjects had received orthodontic treatment. The authors found no correlation between patients' satisfaction with their dental appearance and having undergone any procedure to whiten their teeth. Nevertheless, 134 (88.2 percent) of the dissatisfied subjects reported that they would like to undergo this procedure. Tooth color was a major factor with regard to dental esthetics. Most subjects were interested in improving their appearance and whitening their teeth. When planning treatment, dentists should take into consideration esthetic objectives in addition to function, structure and biology. This requires the clinician to rely on several disciplines in dentistry to deliver the highest level of dental care, which should lead to a higher level of patient satisfaction.
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              Spectrophotometric analysis of coronal discolouration induced by grey and white MTA.

              To evaluate the specific alterations in tooth colour with white and grey MTA when used to fill pulp chambers.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                ijodontos
                International journal of odontostomatology
                Int. J. Odontostomat.
                Universidad de La Frontera. Facultad de Medicina (Temuco, , Chile )
                0718-381X
                June 2018
                : 12
                : 2
                : 152-159
                Affiliations
                [1] Viña del Mar orgnameUniversidad Andrés Bello orgdiv1Facultad de Odontología Chile
                [2] Viña del Mar orgnameUniversidad Andrés Bello Chile
                [3] Viña del Mar orgnameUniversidad Andrés Bello Chile
                Article
                S0718-381X2018000200152
                7c02a8e2-f68f-40d4-b06e-797961852324

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 12 February 2018
                : 19 March 2018
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 28, Pages: 8
                Product

                SciELO Chile


                espectrofotometría,peróxido de carbamida,hydrogen peroxide,tooth bleaching,carbamide peroxide,peróxido de hidrógeno,blanqueamiento dental,spectrophotometry

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