Avaliação clínico visual de três técnicas de clareamento dental

• Autor(a) principal: Lima, João Paulo Martins de
• Data de Publicação: 2012
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/14007
• topic: Tooth bleaching; Hydrogen peroxide; Color; Dentin sensitivity; Efficacy; Clareamento dental; Peróxido de hidrogênio; Cor; Sensibilidade da dentina; Eficácia; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA

The aim of this in vivo study was to evaluated three techniques of vital teeth bleaching on the degree of final color achieved, tooth sensitivity and personal satisfaction of operators and patients. Young individuals of the same age were randomly divided into groups (G1; n=7) at-home: 8h/day/week; (G2; n=7) in-office: 4 weekly sessions of 2 applications of 15 min each one and; (G3; n=6) associated: home/office simultaneously. For at-home and in-office techniques were used carbamide peroxide 16% (WhiteGold Home/Dentsply) and hydrogen peroxide 35 % (Whitegold Office/Dentsply), respectively. The records of color were obtained by a single operator before and after bleaching using the scale Vita Bleachedguide 3D Master and digital camera Canon Rebel XT, with lighting, flash and focal distance standardized. The level of bleaching was evaluated by unit change in color scale and the number of tones achieved and change of color in the CIE L*a*b* by using the software ScanWhite®. The data were treated statistically by the nonparametric Kruskal Wallis and signs (p<0,05). The records of tooth sensitivity during and after bleaching and personal satisfaction of operators and patients were filled out in one-dimensional questionnaires at the end of each session, individually. Scores for the final evaluation of tooth sensitivity were assigned: 0=absent, 1=mild, 2=moderate and 3=severe. The data were treated statistically by Kruskal Wallis. The average variation of unit change in color scale Vita and software were: G1) 4.57 (CI ± 1.34), 27.14 (CI ± 12.03); G2) 2.86 (CI ± 0.99), 21.29 (CI ± 14.27); G3) 4 (CI ± 1.82), 25.33 (CI ± 10.70). The p-values of the signal test were 0.453, 0.453 and 0.687 for the 1, 2 and 3 groups, respectively. The average of the total variation in color (∆E) were, respectively: G1) 8.79(CI±4.18), G2) 7.10(CI±3.53) and G3) 9.74(CI±4,07). No statistically significant difference was determined between the groups. The mid-rank of sensitivity of the groups were: G1=9.64, G2=11.58, G3=10.43; and p-valor=0,807. No statistically difference was determined between the groups. All subjects reported satisfaction at the end of the bleaching. We conclude that objective methods (ScanWhite®) and subjective (Vita scale) to determine the level of color bleaching were equally effective and no difference between them. The level of tooth sensitivity was the same regardless of the technique.