A modified phosphate-bonded casting investment.
An experimental phosphate-bonded casting investment with negligible setting expansion and a thermal expansion of 1.6%, sufficient to compensate for the solid thermal shrinkage of conventional dental gold alloys and high-precious alloys for the porcelain fused to metal technique, is described. When used in a ringless casting technique the investment makes it possible to produce cast restorations with a consistent slidefit. In combination with a die spacer technique the new investment make if possible routinely to produce cast restorations with a consistent and known degree of loosefit.
D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003734:Dental Casting Investment; D003735:Dental Casting Technique; D006047:Gold Alloys; D010710:Phosphates; D013499:Surface Properties; D013816:Thermodynamics
D003734:Dental Casting Investment; D006047:Gold Alloys; D010710:Phosphates