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Dental Materials - 3 Questions
What is the typical setting time for gypsum-based products like dental plasters and stones?1) Less than 10 minutes.2) 10-30 minutes.3) 30-60 minutes.4) More than 60 minutes.
The setting time for gypsum products can range from a few minutes for impression plaster to up to 30 minutes for some dental stones, depending on the specific formulation and water to powder ratio.
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.
What is the typical bond strength of etched enamel with restorative materials?1) 5-10 MPa.2) 15-25 MPa.3) 5-10 MPa.4) 30-50 MPa.
Properly etched enamel surfaces can achieve bond strengths of approximately 15 to 25 MPa when using suitable restorative materials.
MCQ