Materials vs OMDR — Key differences for NEET MDS
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 →OPG = orthopantomogram most common extraoral radiograph. Bisecting angle technique causes foreshortening or elongation. Paralleling technique = more accurate positioning = XCP holder. CBCT = cone beam CT = 3D imaging = gold standard implants TMJ. kVp controls quality and contrast. mA controls quantity and density. ALARA principle = as low as reasonably achievable.
📖 Read full notes →NEET MDS frequently tests the ability to differentiate between related topics. Understanding the key differences between Waxes & Polymers and Radiographic Techniques in Materials vs OMDR is crucial for scoring well. Questions may test diagnostic features, treatment approaches, or characteristic findings.