Pós-Graduação
URI Permanente desta comunidadehttps://repositorio.cesupa.br/handle/prefix/4
Navegar
Navegando Pós-Graduação por Orientador "Loretto, Sandro Cordeiro"
Agora exibindo 1 - 3 de 3
- Resultados por página
- Opções de Ordenação
Item Influência do tucupi na rugosidade superficial, microdureza, ultramorfologia e variação de massa do esmalte dental(Centro Universitário do Estado do Pará, 2019) Sousa, Naama Waléria Alves; Loretto, Sandro Cordeiro; http://lattes.cnpq.br/6988325260181483; Esteves, Renata Antunes; http://lattes.cnpq.br/0001642348652061; Souza Junior, Mário Honorato Silva e; http://lattes.cnpq.br/9220706169410814The study evaluated the influence of tucupi on surface roughness, microhardness, ultra morphology and variation of dental enamel. Ninety healthy bovine incisor teeth of the species Bos taurus indicus were used. After the specimens were made, they were divided into the following groups: G1- tucupi, G2- cola-based refrigerant, G3-istilled water, all evaluated at times T0 (before any intervention), T10 (10 days after the proposed treatments), T20 (20 days after the proposed treatments) and T30 (after 30 days of the proposed treatments). In order to evaluate the properties of the treated enamel, microhardness, surface roughness, scanning electron microscopy (SEM) and mass variation analyzes were performed at the 4 times mentioned above. After confirming the normality of the data (Shapiro-Wilk test) of microhardness, roughness and mass variation analyzes, a 2-factor analysis of variance for repeated measures (α = 5%) was performed, followed by Sidak post-test. , with results described as mean and standard deviation. The roughness means increased for all groups tested, with no statistical difference only in G3 for all evaluated times. Regarding microhardness, all groups had loss with the lowest average observed in G1 in T30. In the evaluation of enamel mass variation, the lowest average was in G2 at time T3, with no statistical difference between T10 and T20 for the group in question. Regarding MEV, all groups treated with acid media G1 and G2 showed disorganization of the enamel surface layer. It was concluded that tucupi has low pH and high titratable total acidity, being able to gradually decrease enamel microhardness, increasing surface roughness and causing loss of dental enamel.Item Influência erosiva do tucupi na resistência da união ao esmalte e dentina(Centro Universitário do Estado do Pará, 2020-12-16) Carneiro, Reginna Vyctoria da Trindade Souza de Melo; Loretto, Sandro Cordeiro; Ribeiro, Mara Eliane Soares; http://lattes.cnpq.br/5959446285132739; http://lattes.cnpq.br/6988325260181483; Carneiro, Paula Mendes Acatauassú; http://lattes.cnpq.br/7375951134055063; Souza Junior, Mário Honorato Silva e; http://lattes.cnpq.br/9220706169410814The present study evaluated the erosive influence of tucupi on the resistance of the adhesive bond to enamel and dentin. 168 healthy bovine incisors teeth were used, divided into 12 groups (n = 14). For erosive cycling, distilled water (negative control), cola-based soft drink (positive control) and tucupi were used. The adhesive strategies used were: (1) total acid conditioning (conventional) and (2) self-conditioning. All specimens were subjected to cycling with the drinks described above for 5 days and, after 24h of the 5th day, composite resin cylinders were made for the micro shear resistance test. The data showed normal distribution and were analyzed by two-way ANOVA, followed by the Tukey post-test (p≤0.05). There were no significant differences in enamel (p>0.05). In dentin, only the groups exposed to cola-based soft drink showed significant differences (p<0.01). The erosive challenge with tucupi did not influence the bond strength to enamel and dentin, independent of the adhesive strategy used.Item Influência erosiva do tucupi na resistência de união de interfaces adesivas preestabelecidas em esmalte e dentina(Centro Universitário do Estado do Pará, 2022-06-01) Wanderley, Marina Lima; Loretto, Sandro Cordeiro; Ribeiro, Mara Eliane Soares; http://lattes.cnpq.br/5959446285132739; http://lattes.cnpq.br/6988325260181483; Carneiro, Paula Mendes Acatauassú; http://lattes.cnpq.br/7375951134055063; Gatti, Joyce Figueira de Araújo; http://lattes.cnpq.br/0188270217176622This study evaluated the erosive influence of tucupi on the bond strength of pre-established adhesive interfaces to enamel and dentin. A total of 168 healthy bovine incisors were used, divided into 12 groups (n=14) according to the type of substrate (enamel or dentin), type of erosive cycling (distilled water, cola soft drink or tucupi), and type of adhesive strategy used (Etch&rinse and self-etch). The groups were: G1: enamel (ESM)+distilled water (H2O)+ Etch&rinse (ER); G2: dentin (DEN)+H2O+ER; G3:ESM+ cola soft drink (RBC) + ER; G4: DEN+RBC+ER; G5: ESM+tucupi (TUC)+ER; G6: DEN + TUC + ER; G7: ESM + H2O + self-etch (SE); G8: DEN + H2O + SE; G9: ESM + RBC + SE; G10: DEN +RBC+ SE; G11: ESM+TUC+SE; G12: DEN+TUC+SE. Cylinders of resin were made on enamel or dentin surfaces and, after 24 hours, the specimens were submitted to erosive cycling for 5 days. After 24 hours of the last cycle, a microshear test was performed. Analysis of fracture was performed using a stereoscopic magnifying glass. The results were submitted to two-way ANOVA, followed by Tukey's post-test, with results described as mean and standard deviation (α=5%). The groups exposed to tucupi showed significantly lower bond strength (p<0.05) in relation to the negative control groups (distilled water), and were statistically similar to the positive control groups (cola soft drink), both in enamel and dentin, for both adhesive strategies used. Therefore, it was possible to conclude that erosive cycling with tucupi influenced the bond strength of pre-established adhesive interfaces in enamel and dentin, regardless of the adhesive strategy.