Effects of dental bleaching on the color, translucency and fluorescence properties of enamel and dentin

The objective of this study was to evaluate the color, translucency and fluorescence of bovine enamel and dentin submitted to different bleaching modalities. Pairs of enamel and dentin discs (3 mm in diameter) were obtained from 150 bovine teeth. In 75 of the pairs, one specimen had the enamel removed (Dentin Group). The dentin was removed from one specimen of the remaining 75 pairs (Enamel Group) and the other specimen was left unaltered (Enamel + Dentin). The evaluation of color, translucency and fluorescence was performed with a spectrophotometer using the CIE L* a* b*. Each group was subdivided into three subgroups: Control, composed of specimens that were not bleached, and two experimental subgroups, bleached with either 10% carbamide peroxide (CP10%) or 35% hydrogen peroxide (HP35%). The CP10% bleaching gel was applied 2 h/day for 14 days. The HP35% bleaching agent was applied using two applications of 30 min each, with a one week interval between each application. When not being bleached, the specimens were immersed in artificial saliva. The color, translucency and fluorescence ratings were assessed using spectrophotometry 7 days after the treatment. Regarding color, significant differences were found between bleaching techniques in the groups Enamel and Enamel + Dentin, with a higher color difference for HP35%. Bleaching did not change the translucency of the dental tissues. There were significant differences for fluorescence for the HP35% subgroups of Dentin and Enamel + Dentin, and for the CP10% subgroup of Enamel. Dental bleaching changed the color and fluorescence of the dental tissues, however translucency was not affected.

Oxidative stress and inflammatory response biomarkers in dogs with mammary carcinoma

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Avaliação in vitro da resistência de união de dois sistemas adesivos dentinários à dentina bovina antes e após a termociclagem: teste de cisalhamento e análise estereomicroscópia

Pós-graduação em Odontologia Restauradora - ICT

Linking natural supersymmetry to flavour physics

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Influência da inalação da fumaça de cigarro no reparo de enxertos ósseos autógenos onlay em ratas ovarectomizadas: estudo histomorfométrico

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Prevalência de portadores da mutação associada à deficiência da enzima ramificadora de glicogênio (GBED) em cavalos da raça quarto de milha

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Associação da suplementação de vitamina D3 e do alcoolismo experimental em ratos: efeitos morfológicos e comportamentais

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Hemodiálise prolongada na lesão renal aguda associada a sepse: sobrevida dos pacientes de acordo com o momento da indicação e a dose de diálise recebida

Pós-graduação em Fisiopatologia em Clínica Médica - FMB

Desenvolvimento e validação de um questionário multidimensional de avaliação da qualidade de vida relacionada ao melasma (HRQ-Melasma)

Pós-graduação em Enfermagem (mestrado profissional) - FMB

Desenvolvimento micelial de Lentinula edodes em meios de cultivo à base de diferentes substratos orgânicos

The radial mycelial growth of Lentinula edodes (Berk.) Pegler, strain LE-96/13, was studied in culture media prepared with organic residues extract, by using substrates prepared with pineapple (Ananas comosus (L.) Merril) crown, Astrocaryum aculeatum Meyer peel, Theobroma grandiflorum Schum shell, Musa sp. (genomic group AAB, subgroup Pacovan) peel, and Musa sp. (genomic group AAB, subgroup Prata) peel, with three supplementation levels with wheat bran (0, 10 and 20%), and incubated at 25ºC. The experimental design was totally randomized, in a 5×3 factorial scheme, adding up 15 treatments with 4 repetitions, and each repetition corresponding to a Petri dish. The diameter of the colony was evaluated daily during nine days of incubation. After that period, it was verified that the highest mycelial growth averages of strain LE-96/13 of L. edodes were found in culture media prepared with T. grandiflorum Schum shell (whose supplementation with wheat bran was favorable for Mushroom development) and A. aculeatum Meyer peel (whose supplementation did not favor the mycelial growth of L. edodes in relation to the medium not supplemented).

Sobre os grupos de Gottlieb

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Influência da inalação da fumaça de cigarro na regeneração óssea guiada em enxertos autógenos onlay em ratas com deficiência estrogênica: estudo histomorfométrico

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)