Abstract Glaze application on monolithic zirconia (Y-TZP) can be a practical approach to improve the mechanical properties of this material. Objective Our study evaluated the effect of glazing side and mechanical cycling on the biaxial flexure strength (BFS) of a Y-TZP. Methodology Eighty sintered Y-...
Zens, Marlyni Aparecida;
Icochea, Alfredo Llerena;
Costa, Bruna Carolina;
Lisboa-Filho, Paulo Noronha;
Bastos, Natália Almeida;
Francisconi, Paulo Afonso Silveira;
Furuse, Adilson Yoshio;
Foschini, Cesar;
Gerlin Neto, Vicente;
Borges, Ana Flávia Sanches.
Abstract Objective This study aims to evaluate the effect of sonochemical treatment on the surface of yttria-stabilized tetragonal zirconia (Y-TZP) before and after the final sintering. Material and Methods Twenty-eight Y-TZP discs were divided into four groups (n=7), according to surface treatment: ...
Abrasión Dental por Aire,
Análisis de Varianza,
Recubrimiento Dental Adhesivo/métodos,
Ensayo de Materiales,
Valores de Referencia,
Reproducibilidad de los Resultados,
Cementos de Resina/química,
Resistencia al Corte,
Estadísticas no Paramétricas,
Propiedades de Superficie,
Itrio/química,
Circonio/química
Aim: This study evaluated the effect of surface treatments of yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramics on their bond strength to a resin cement. Methods: Seventy zirconia blocks (6 × 6 × 2 mm3, IPS e.max ZirCAD) were assigned into 7 groups (n=10) – as-sintered (AS), no treat...
Abstract It evaluated the effect of aging by Low Temperature Degradation (LTD), executed after post- processing surface treatments (polishing, heat treatment and glazing), on the surface characteristics (micromorphology and roughness) and on the structural stability (phase transformation and mechanical b...
Materiales Dentales/química,
Pulido Dental/métodos,
Resistencia Flexional,
Calor,
Ensayo de Materiales,
Microscopía de Fuerza Atómica,
Microscopía Electrónica de Rastreo,
Propiedades de Superficie,
Difracción de Rayos X,
Itrio/química,
Circonio/química
Abstract This study evaluated the effectiveness of a multi-mode adhesive (SBU-Scotch Bond Universal/3M) as a substitute for silica coating and silane application on the bonding of zirconia ceramics to resin cement. One-hundred and twenty sintered zirconia ceramic blocks (5 x 5 x 5 mm) were obtained, fini...
Recubrimiento Dental Adhesivo,
Cementos Dentales,
Análisis del Estrés Dental,
Análisis de Falla de Equipo,
Cementos de Resina/química,
Resistencia al Corte,
Silanos/química,
Silicatos/química,
Espectrometría por Rayos X,
Resistencia a la Tracción,
Humectabilidad,
Difracción de Rayos X,
Itrio,
Circonio
Abstract Sandblasting is a common method to try to improve the Y-TZP/veneer bond strength of dental prostheses, however, it may put stress on zirconia surfaces and could accelerate the t→m phase transformation. Y-TZP sandblasting before sintering could be an alternative to improve surface roughness...
Titanium dioxide nanotubes (TiO2) have been applied to enhance the mechanical properties of dental materials. Yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) has been increasingly used in dentistry. Aside from its optimal clinical results, Y-TZP is prone to failures related to insufficient thi...
Itrio/química,
Circonio/química,
Cementos de Resina/química,
Titanio/química,
Nanotubos/química,
Cerámica/química,
Recubrimiento Dental Adhesivo/métodos,
Ensayo de Materiales,
Docilidad,
Microscopía Electrónica de Rastreo,
Resistencia al Corte,
Análisis de Varianza,
Estadísticas no Paramétricas,
Reproducibilidad de los Resultados
Abstract This study aimed to characterize and compare the effect of different aging regimens on surface characteristic (topography and roughness), structural stability (phase transformation) and mechanical performance (Weibull analysis) of a Y-TZP ceramic. Discs (15 × 1.2 mm; VITA In-Ceram YZ) were prep...
Abstract Monolithic restorations of Y-TZP have been recommended as a restorative alternative on prosthetic dentistry as it allows a substantial reduction of ceramic thickness, which means a greater preservation of tooth structure. However, the influence of grinding and aging when using a thinner layer of...
Análisis de Varianza,
Cerámica/química,
Frío,
Ensayo de Materiales,
Microscopía Electrónica de Rastreo,
Docilidad,
Distribución Aleatoria,
Reproducibilidad de los Resultados,
Estadísticas no Paramétricas,
Propiedades de Superficie,
Resistencia a la Tracción,
Factores de Tiempo,
Difracción de Rayos X,
Itrio/química,
Circonio/química
As taxas de dose superficial de dois aplicadores dermatológicos foram determinadas utilizando uma câmara de extrapolação projetada e construída no Laboratório de Calibração do IPEN. Apresenta-se neste trabalho a comparação entre as calibrações realizadas no IPEN e pelo fabricante....
