Dental Materials — Key differences for NEET MDS
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 →PMMA = polymethyl methacrylate = heat cure acrylic denture base. Porosity types in acrylic: Gaseous most common, Contraction, Granular. Lost wax technique: Wax pattern, Investment, Burnout, Casting. Inlay wax = type 1 direct type 2 indirect. Baseplate wax = Type I. Modeling wax = impression compound. Pour type acrylic = fluid resin.
📖 Read full notes →NEET MDS frequently tests the ability to differentiate between related topics. Understanding the key differences between Mechanical Properties and Waxes & Polymers in Dental Materials is crucial for scoring well. Questions may test diagnostic features, treatment approaches, or characteristic findings.