STATEMENT OF PROBLEM When veneering composite resin-metal restoration is prepared, the fact that bond strength between Ti and composite resin is relatively weak should be considered. PURPOSE The purpose of this study is to evaluate the shear bond strength between the veneering composite resin and commercial pure (CP) Ti / Ti-6Al-4V alloy according to the method of surface treatment. MATERIA...

The purpose of this study was to evaluate the effect of design and surface finishing on fracture strength of yttria-tetragonal zirconia polycrystal (Y-TZP) crowns in monolithic (1.5 mm thickness) and bilayer (0.8 mm zirconia coping and 0.7 mm porcelain veneer) configuration after artificial aging. Bovine incisors received crown preparation and Y-TZP crowns were manufactured using CAD/CAM techni...

Individual crown condition of Eucalyptus gomphocephala was assessed using two classification models to understand changes in forest health through space and time. Using high resolution (0.5 m) digital multispectral imagery, predictor variables were derived from textural and spectral variance of all pixels inside the crown area. The results estimate crown condition as a surrogate for tree health...

Geotextile layers are arranged on and below the geomembrane to prevent from being punctured damaged. The geotextile not only plays a role in physical protection, like anti-puncture but also makes great difference mechanical properties of geomembrane’s air expansion deformation. In this paper, bulging deformation is simplified as spherical under ring-restrained conditions. Using special test equ...

The closed section of the inverted arch, formed by surrounding rock, acts as a bearing ring. Combined with upper initial support, it ensures stable support. However, excavating arch can disturb original balance, significantly affecting tunnel’s stability. To determine optimal exposure length and excavation elevation arches at different rock levels, numerical analyses were conducted. These used ...

Abstract Modern dental healthcare is unthinkable without the use of biocompatible materials. They must have necessary mechanical properties to ensure strength structures, as well be acceptable possible by human body. In recent years, there has been an increase in application zirconium dioxide (ZrO 2 ) material metal ceramics manufacture crowns, bridges and others. This its natural continuation ...

ECOSYSTEMS CAN BE MODELED AT MANY different hierarchical levels. The phenomenon being simulated has a context represented by the next higher level of ecosystem organization, as well as driving mechanisms represented by the next lower level of ecosystem organization. In this sense, the level at which mechanisms are represented in models of tree crowns depends on the crown attributes or processes...