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Dental Materials - 3 Questions
What is the primary wavelength emitted by an argon laser used in dentistry?1) 400-500 nm.2) 500-600 nm.3) 800-900 nm.4) 1000-1100 nm.
Argon lasers emit light in the green-blue spectrum, with wavelengths between 488 and 514.5 nm, which are absorbed well by pigmented tissues like hemoglobin and melanin, making them useful for soft tissue procedures.
What is the role of a primer in the bonding process of resin cements?1) To clean the tooth surface2) To increase the surface energy of the tooth structure3) To reduce the surface tension of the bonding agent4) To accelerate the setting of the cement
A primer increases the surface energy of the tooth structure, enhancing the ability of the bonding agent to wet and infiltrate the surface.
Apart from composites and ceramics, another material that could be copy milled easily and inexpensively is: 1) Molybdenum 2) Germanium 3) Titanium 4) Chromium
Fabrication of ceramics and metals like titanium that are difficult to cast, is done by CAD-CAM process and copy milling.
MCQ