Dental Materials — Key differences for NEET MDS
Addition silicone PVS = most accurate no byproduct. Condensation silicone = releases alcohol byproduct = shrinkage. Polysulfide = longest setting time messiest = lead dioxide accelerator. Polyether = stiffest most hydrophilic = initial rigidity. Alginate = irreversible hydrocolloid = snap set. Agar = reversible hydrocolloid = high detail low strength. Impression plaster = most rigid.
📖 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 Impression Materials and Waxes & Polymers in Dental Materials is crucial for scoring well. Questions may test diagnostic features, treatment approaches, or characteristic findings.