Casting Machines In Dentistry
Write a short note on casting the crucible.
Answer:
- The crucible is heat resistant container in which alloy is melted before casting.
- There are four types of casting crucibles, i.e. Clay, carbon, quart, and zirconia-alumina.
- Clay crucibles are used for high noble and noble type alloys while carbon crucibles are used for high noble crown and bridge alloys and for high fusing, gold-based metal ceramic alloys.
- Alumina, quart, or silica crucibles are recommended for high-fusing alloys that have high melting temperatures and are sensitive to carbon contamination.
- So carbon crucibles are not used with high palladium, silver palladium, nickel-chromium, and cobalt-chromium alloys.
Various crucibles and alloys are used in them
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