This study evaluated the repair bond strength of a nanohybrid resin composite to a novel CAD/CAM hybrid ceramic based on four intraoral ceramic repair systems. Vita Enamic (VE) CAD/CAM hybrid ceramic was used in this study. Specimens were divided into five test groups according to the repair method performed on the ceramic surface: Gr C (No treatment; control); Gr CZ (Cimara Zircon); Gr PR (Por...

plate model, were calculated by the theory of statically indeterminate beam and the finite element method. The factors that have the greatest effect on thermal residual stress in the veneer are coefficient of thermal expansion, modulus of elasticity and thickness of the layers. The relation between these factors and thermal residual stress after firing were studied. The effect of physical and m...

OBJECTIVES To comparatively assess the micro shear bond strength (MSBS) of dentin bonded surface pre-treated zirconia ceramics. MATERIALS AND METHODS Zirconia blocks were sectioned into 50 cubical blocks. The blocks were further categorized into five groups (n = 10 each). Group I: No treatment was performed on zirconia samples; Group II: The zirconia samples were sand-blasted; Group III: Grou...

Heart rate is associated with work hardness and increase linearly with its increasing. In the average of energy consumption, heart rate measurement is simple but non-accurate method for calculation of work hardness. Our purpose in this research was to evaluate the relationship between heart rate and dynamometry results with hypothesis of work hardness effectiveness on the human power. This stud...

It has been demonstrated that a Cs(2)O-stabilized leucite porcelain was susceptible to a stress-induced phase transformation, but toughening was not observed.1 It was hypothesized that if Cs(2)O-stabilized leucite core particles were added to a cesium-free matrix porcelain, selected or designed to enhance the toughening mechanism, toughening would occur. A commercial porcelain (VP) and a synthe...

Karina Andrea Novaes Olivieri 1 Maximiliano Piero Neisser 2 Marco Antônio Bottino 2 Milton Edson Miranda 3 1PhD, Post-graduated, Department of Dental Materials and Prosthodontics, Faculty of Odontology of São José dos Campos, UNESP, Brazil and Associated Professor, Department of Prosthodontics, Faculty of Odontology São Leopoldo Mandic – CampinasBrazil. 2PhD, Associated Professor, Department of...

OBJECTIVE This study evaluated the influence of porcelain (VM9, VITA Zahnfabrik, Germany) thickness on the flexural strength and crack propagation in bilayered zirconia systems (YZ, VITA Zahnfabrik, Germany). MATERIAL AND METHODS Thirty zirconia bars (20.0x4.0x1.0 mm) and six zirconia blocks (12.0x7.5x1.2 mm) were prepared and veneered with porcelain with different thickness: 1 mm, 2 mm, or 3...

The royal porcelain manufactories in eighteenth-century Continental Europe were sites of production that implemented chemistry in three different areas: manufacture of porcelain paste, preparation of pigments for ornamenting porcelain, and construction of furnace along with choice of fuel for firing porcelain. This paper provides evidence for the Royal Prussian Porcelain Manufactory in Berlin b...

STATEMENT OF PROBLEM One-step and incremental mixing procedures are currently used to produce dental ceramic pastes. In the ceramic industry, high quality is obtained using one-step mixing, but in dentistry, the best method has not been yet determined. PURPOSE The purpose of this study is to evaluate the effects of 2 mixing techniques on the biaxial flexural strength and microstructure of den...

Objective: To evaluate fracture strength of veneered translucent zirconium dioxide crowns designed with different porcelain layer thicknesses. Materials and Methods: Sixty crowns, divided into six groups of 10, were used in this study. Groups were divided according to different thicknesses of porcelain veneer on translucent zirconium dioxide cores of equal thickness (0.5 mm). Porcelain thicknes...