Dissertação
URI Permanente para esta coleçãohttps://repositorio.cesupa.br/handle/prefix/13
Navegar
Navegando Dissertação por Autor "Esteves, Renata Antunes"
Agora exibindo 1 - 3 de 3
- Resultados por página
- Opções de Ordenação
Item Avaliação da alteração de cor e rugosidade superficial de resinas bulk fill após escovação mecânica e envelhecimento(Centro Universitário do Estado do Pará, 2018) Balla, Mariana Vieira; Esteves, Renata Antunes; http://lattes.cnpq.br/0001642348652061The objective of this study was to evaluate, in vitro, the color stability (ΔE) and the surface roughness (Ra) of bulk fill (Filtek Bulk Fill e Tetric N-Ceram Bulk fill) and conventional (Filtek Z350XT e Filtek Bulk fill) composites, after mechanical brushing and aging. Specimens were made (n=5), with rounded bipartite matrix (8mm diameter x 4mm thickness). They were evaluated for color change (Spectrophotometer, Color Guide, BYK Gardner) and surface roughness (PROSCAN 2100 3D optical profilometer; Scantron), initially and after the tests. They were divided into 3 groups according to the tests: A-brushing (14,600 cycles, mechanical brushing machine, Elquip); B-thermocycling (5,000 cycles, 5-55°C, 30 seconds, Thermocycler, New Ethics-Scientific Equipment S.A.); C- thermocycling followed by brushing (same protocol). After all evaluations, the means were calculated and compared by means of analysis of variance (ANOVA) and Tukey's test. The level of significance was 5%. It was concluded that all resins were influenced by brushing and thermocycling. But the resin that suffered the most changes in color and roughness after mechanical brushing and thermocycling was Tetric N-Ceram Bulk fill resin.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 Resinas bulk fill vs resinas convencionais na sensibilidade pós-operatória: uma revisão sistemática com meta-análise(Centro Universitário do Estado do Pará, 2020-08-10) Giubilei, Fernanda Bernardes; Esteves, Renata Antunes; Alencar, Cristiane de Melo; http://lattes.cnpq.br/4783175034033264; http://lattes.cnpq.br/0001642348652061; Loretto, Sandro Cordeiro; http://lattes.cnpq.br/6988325260181483; Silva, Cecy Martins; http://lattes.cnpq.br/3349622952425723Objective: To compare restorations performed with bulk fill resins vs. conventional resins in relation to postoperative sensitivity, through a systematic review of randomized clinical studies (RCT). Sources: Five electronic databases were searched: Pubmed, Cochrane, Web of science, Scopus and Open gray. Study selection: RCTs that compared the postoperative sensitivity observed in teeth restored with conventional resins vs bulk fill resins were included. Studies that used cavity and / or desensitizing liners were excluded from the study. The risk of bias was classified by the Cochrane guidelines. Two meta-analyzes were performed to assess the postoperative sensitivity of restorations made with bulk fill and conventional resin in the periods of 7 and 180 days. Results: Five RCTs with a low risk of bias were included in the meta-analysis. The evaluation after 7 days was performed in Non-Carious Cervical Injury and in Black classes I and II. Patients who used Bulk fill resins (n = 143) had lower postoperative sensitivity when compared to the use of conventional composite resin (n = 142) (-0.06 [-0.11, -0.01], p = 0.03). The second evaluation, after 180 days, was performed in class V cavities. There was no significant difference in postoperative sensitivity between patients who used Bulk fill resins (n = 125) compared to the use of conventional composite resin (n = 121) in the 180-day period (-0.02 [-0.11, 0.08], p = 0.73). Conclusions: Restorations with bulk fill resins showed lower postoperative sensitivity when compared to restorations using conventional resins up to seven days after restoration and there was no difference in postoperative sensitivity in the 180-day evaluation. However, due to the relatively limited amount of evidence to support this conclusion, more RCTs with a low risk of bias should be performed. Clinical significance: Postoperative sensitivity is very recurrent after restorative treatment, which has led to the development of new materials to circumvent this complication. The restorative treatment using bulk fill resins had a positive effect on postoperative sensitivity when compared to conventional resins within 7 days.