Efeito das técnicas de desinfecção sobre a dureza e rugosidade superficial dos materiais reembasadores

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

Avaliação clínica do efeito de dois métodos de desinfecção sobre a rugosidade, estabilidade de cor e formação de biofilme de próteses reembasadas

Pós-graduação em Reabilitação Oral - FOAR

Análise fotoelástica da tensão entre diferentes tipos de sistemas de retenção em próteses obturadoras palatinas implanto-retidas ou não e com ou sem reembasamento “soft”

Pós-graduação em Odontologia - FOA

Influência de diferentes resinas acrílicas e técnicas de polimerização na resistência de união e dureza shore A de materiais reembasadores macios

Pós-graduação em Reabilitação Oral - FOAR

Caracterização de materiais experimentais e comerciais para reembasamento imediato por meio de análise de propriedades físico-químicas e mecânicas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efetividade microbiológica da desinfecção por microondas e seus efeitos sobre a dureza de materiais reembasadores macios

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeito da desinfecção química e por microondas na alteração dimensional e resistência de união de resinas para reembasamento imediato e resina termopolimerizável

Pós-graduação em Reabilitação Oral - FOAR

Efeito do tempo e da desinfecção por micro-ondas no desempenho clínico e na quantificação de micro-organismos de um reembasador rígido

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

O uso da termociclagem na avaliação da absorção, solubilidade, dureza e alteração de cor de reembasadores resilientes

Pós-graduação em Odontologia - FOA

Small-scale landfills: impacts on groundwater and soil

In Brazil, the large quantities of solid waste produced are out of step with public policies, technological developments, and government budgets for the division. In small municipalities, the common lack of technological knowledge and financial conditions for suitable waste disposal has resulted in a large number of illegal dumps. Therefore, small sanitary landfill facilities are working with simplified operations focusing on cost reduction and meeting the economic and technological standards of the city without endangering the environment or public health. Currently, this activity is regulated at a federal level although there is some uncertainty regarding the risk of soil and aquifer contamination as theses facilities do not employ liners. Thus, this work evaluates a small landfill to identify changes in soil and groundwater using geotechnical parameters, monitoring wells, and geophysical tests performed by electrical profiling. It is verified that based on current conditions, no contaminants have migrated via underground water aquifers, and overall no significant changes have occurred in the soil. It is concluded that, despite its simplicity, the method investigated is a viable alternative for the final disposal of municipal solid waste from small cities, especially in developing countries.

Efficacy of Surface Treatments on the Bond Strength of Resin Cements to Two Brands of Zirconia Ceramic

Purpose: To compare the shear bond strength (SBS) of two cements to two Y-TZP ceramics subjected to different surface treatments.Materials and Methods: Zirconia specimens were made from Lava (n = 36) and IPS e.max ZirCAD (n = 36), and their surfaces were treated as follows: no treatment (control), silica coating with 30-mu m silica-modified alumina (Al2O3) particles (CoJet Sand), or coating with liners Lava Ceram for Lava and Intensive ZirLiner for IPS e.max ZirCAD. Composite resin cylinders were bonded to zirconia with Panavia F or RelyX Unicem resin cements. All specimens were thermocycled (6000 cycles at 5 degrees C/55 degrees C) and subjected to SBS testing. Data were analyzed by post-hoc test Tamhane T2 and Scheffe tests (alpha = 0.05). Failure mode was analyzed by stereomicroscope and SEM.Results: With both zirconia brands, CoJet Sand showed significantly higher SBS values than control groups only when used with RelyX Unicem (p = 0.0001). Surface treatment with liners gave higher SBS than control groups with both ceramic brands and cements (p < 0.001). With both zirconia brands, the highest SBS values were obtained with the CoJet and RelyX Unicem combination (> 13.47 MPa). Panavia F cement showed significantly better results when coupled with liner surface treatment rather than with CoJet (p = 0.0001, SBS > 12.23 MPa). In untreated controls, Panavia F showed higher bond strength than RelyX Unicem; the difference was significant (p = 0.016) in IPS e.max ZirCAD. The nontreated specimens and those treated with CoJet Sand exhibited a high percentage of adhesive and mixed A (primarily adhesive) failures, while the specimens treated with liners presented an increase in mixed A and mixed C (primarily cohesive) failures as well as some cohesive failure in the bulk of Lava Ceram for both cements.Conclusion: CoJet Sand and liner application effectively improved the SBS between zirconia and luting cements. This study suggests that different interactions between surface treatments and luting cements yield different SBS: in clinical practice, these interactions should be considered when combining luting cements with surface treatments in order to obtain the maximum bond strength to zirconia restorations.

Resistance to impact of cross-linked denture base biopolymer materials: Effect of relining, glass flakes reinforcement and cyclic loading

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Physical and mechanical properties of particleboard bamboo waste bonded with urea formaldehyde and castor oil based adhesive

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

Biological effects of soft denture reline materials on L929 cells in vitro

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

Effect of the addition of antimicrobial agents on shore a hardness and roughness of soft lining materials

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