Dental Materials • 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.
Use these mnemonics during your revision. The key associations above are designed to help you recall Casting Alloys & Investment concepts instantly during the exam. Focus on the “equals” associations — these are the most commonly tested patterns in NEET MDS.