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 →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 →NEET MDS frequently tests the ability to differentiate between related topics. Understanding the key differences between Impression Materials and Casting Alloys & Investment in Dental Materials is crucial for scoring well. Questions may test diagnostic features, treatment approaches, or characteristic findings.