Dental Materials — Key differences for NEET MDS
Type I gold alloy = inlays soft. Type II = inlays onlays medium. Type III = crowns bridges hard. Type IV = partial denture frameworks extra hard. Ni-Cr = most common base metal alloy = beryllium concern. Gypsum bonded investment = gold casting = low melting. Phosphate bonded investment = base metal = high melting. Silica bonded = highest expansion.
📖 Read full notes →Stress = Force divided by Area = internal resistance. Strain = change in length divided by original length = deformation. Elastic modulus = Youngs modulus = stress divided by strain = stiffness. Toughness = total area under stress-strain curve. Resilience = energy absorbed in elastic region only. Hardness tests: Knoop for micro surfaces, Vickers universal, Brinell for macrosurfaces.
📖 Read full notes →NEET MDS frequently tests the ability to differentiate between related topics. Understanding the key differences between Casting Alloys & Investment and Mechanical Properties in Dental Materials is crucial for scoring well. Questions may test diagnostic features, treatment approaches, or characteristic findings.