Hardness Describe briefly hardness. Or Write a short note on hardness. Answer: Hardness is defined as resistance to permanent indentation. Initially, an arbitrary hardness indexing scheme known as the Mohs scale is used to determine hardness. Hardness does not have any clinical relevance, though the measurement of hardness is an indicator of other … [Read more...] about Hardness
Dental Materials
Brinell Hardness
Brinell Hardness Question 1. Write a short note on BHN and KHN. Answer: Question 2. Write a short note on the KHN number. Answer: KHN number stands for Knoop hardness number. The Knoop hardness value is independent of the ductility of the tested material. Following are the various Knoop hardness numbers of some selected materials: KHN is a microhardness … [Read more...] about Brinell Hardness
Color Vision
Color Vision Write a short note on color perception. Answer: Perception of the color of an object is entirely a subjective experience, a result of a physiological response to physical stimulus. Color perception is described by three objectives of variables, i.e. hue, value, and chroma. Hue of color perception: Hue describes the dominant color of an object, for … [Read more...] about Color Vision
Hybrid Dental Composites Biomechanical Properties
Hybrid Dental Composites Biomechanical Properties Write a short note on hybrid composite resin. Answer: Hybrid Composite Resin: The latest category of composite is the hybrid. These were to be developed so as to obtain better surface smoothness than that of the small particle, but yet maintain the properties of the latter. The hybrid composites have a surface … [Read more...] about Hybrid Dental Composites Biomechanical Properties
Surface Roughness Of Microfilled Composites
Surface Roughness Of Microfilled Composites Write a short note on microfiled resin. Answer: They were developed to overcome the problems of surface roughness of conventional composites. The resin achieved the smoothness of unfiled acrylic direct filing resins and yet had the advantage of having filers. Composition of Microfiled Resin: The smooth surface is due to … [Read more...] about Surface Roughness Of Microfilled Composites