Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-05-11T20:02:58Z No. of bitstreams: 1 LeonardoNunesMaiaPimentel_DISSERT.pdf: 1254095 bytes, checksum: a9efb1c54d07df68ac2b799a5135cc7e (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-05-19T00:29:08Z (GMT) No. of bitstreams: 1 LeonardoNunesMaiaPimentel_DISSERT.pdf: 1254095 bytes, checksum: a9efb1c54d07df68ac2b799a5135cc7e (MD5) / Made available in DSpace on 2016-05-19T00:29:08Z (GMT). No. of bitstreams: 1 LeonardoNunesMaiaPimentel_DISSERT.pdf: 1254095 bytes, checksum: a9efb1c54d07df68ac2b799a5135cc7e (MD5) Previous issue date: 2015-07-27 / O objetivo desse estudo foi avaliar a influ?ncia de agentes remineralizantessobre a susceptibilidade do esmalte clareado ? pigmenta??o por caf? durante o clareamento de consult?rio. Noventa incisivos bovinos foram selecionados e divididos aleatoriamente em 5 grupos (n=10) em fun??o dos agentes remineralizantes: G1 sem pigmenta??o e sem agente remineralizante; G2, fl?or neutro; G3, Nano-P, G4, CPP-ACP e; G5 sem remineralizante. A solu??o pigmentante foi confeccionada com caf? sol?vel (Nescaf?) de acordo com as orienta??es do fabricante. As amostras foram imersas no caf?, em temperatura de 55?C, por 1 minuto/4x ao dia. Todos os grupos foram clareados com Per?xido de Hidrog?nio a 35%. As medidas de cor foram realizadas pelo espectrofot?metro Easyshade (VITA), pelo m?todo CIE Lab, antes e depois das 3 sess?es de clareamento. Os dados foram submetidos ? An?lise de Vari?ncia ANOVA a dois crit?rios para medidas pareadas e ao p?s-teste de Tukey para m?ltiplas compara??es (p<0,05). Os resultados mostraram haver diferen?as estatisticamente significantes entre as subst?ncias remineralizantes para os par?metros *L, *a, *b e ?E (p<0,0001). Os valores de L*, para o grupo G5, e os de *b, para os grupos G2 e G5, diferiram do grupo controle. Ap?s a 3? sess?o de clareamento, os grupos do Fluor (G2) e aquele sem agente remineralizante (G5) apresentaram valores de ?E inferiores ao grupo controle, n?o pigmentado. Concluiu-se que a apenas os agentes remineralizantes CPP-ACP e Nano-P foram capazes de reduzir a interfer?ncia do caf? na efic?cia clareadora do per?xido de hidrog?nio. / The aim of this study was to evaluate the influence of remineralizing agents on the susceptibility of enamel cleared by the coffee pigmentation during office bleaching. Fifty bovine incisors were selected and randomly assigned into 5 groups (n = 10) on the basis of remineralizing agents: G1 gel hydrogen peroxide to 35% (control group); G2, hydrogen peroxide gel and a 35% gel 2% neutral fluorine; G3, hydrogen peroxide gel and a 35% nanostructured calcium phosphate gel, G4, hydrogen peroxide gel and a 35% casein fosfopt?dia-phosphate and amorphous calcium folder; G5 hydrogen peroxide gel to 35% without mineralizing agent. All groups exception G1 (control group) were subjected to pigmentation soluble coffee according to the manufacturer's guidelines. The samples were immersed in coffee at temperature of 55? C, 1 time a day for 4 minutes. Color changes were performed by Easyshade spectrophotometer at CIE Lab method before and after 3 whitening sessions. Data were analyzed by analysis of variance ANOVA. The results showed statistically significant differences between the remineralizing substances for the parameters L *, a *, b * ?E (p <0.0001). The L * values for the group G5, and the b * for G2 and G5 groups differed from the control group. After the 3rd whitening session, Fluor's group (G2) and that without mineralizing agent (G5) showed ?E values less than the control group that did not undergo pigmentation. It was concluded that only the nanoclusters remineralizing agents Phosphopeptides Casein-Amorphous Calcium Phosphate and Calcium Amorphous phosphate were able to reduce the coffee interference whitening efficacy of hydrogen peroxide.