title: An improved dental casting investment.
abstract: In the present investigation a gypsum-bonded investment is presented with negligible setting expansion and a thermal expansion of 1.7%. This investment can and should be used without a steel casting ring. In combination with an earlier described die-spacing technique the new investment facilitates the production of gold inlays and crowns which, independent of type, will show a suitable degree of loose-fit in or on the preparations in the patient's mouth.
mesh_terms: D002133:Calcium Sulfate; D003734:Dental Casting Investment; D003735:Dental Casting Technique; D006047:Gold Alloys; D011791:Quartz; D013696:Temperature
chemical_list: D003734:Dental Casting Investment; D006047:Gold Alloys; D011791:Quartz; D002133:Calcium Sulfate