Materials vs OMDR — 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 →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 Casting Alloys & Investment and Radiographic Techniques in Materials vs OMDR is crucial for scoring well. Questions may test diagnostic features, treatment approaches, or characteristic findings.