Chemical analysis, castability, and tensile properties of twenty‐one dental base metal casting alloys for removable dental appliances

• Published in: Australian dental journal Vol. 28; no. 6; pp. 370 - 377
• Main Authors: Brockhurst, P. J., McLaverty, V. G.
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01-12-1983
• Subjects: Australia; Chemical Phenomena; Chemistry; Dental Alloys - analysis; Dental Alloys - standards; Dental Casting Investment - analysis; Dental Casting Investment - standards; Dental Casting Technique; Dentistry; Denture, Partial, Removable; Stress, Mechanical; Australia
• ISSN: 0045-0421; 1834-7819
• DOI: 10.1111/j.1834-7819.1983.tb01110.x

— Twenty‐one alloys used in Australia were tested for chemical composition, castability, and tensile properties. Nineteen alloys consisted of mainly cobalt, chromium, and molybdenum, while two Ticonium alloys were mainly nickel and chromium. All alloys passed the British castability test. Six alloys had a combination of strength and ductility superior to the remainder of the alloys tested. Five of these differed from the composition of the main group. The proposed minimum requirements for the Australian Standard on Dental Base Metal Casting Alloys for Removable Dental Appliances of 500 MPa 0.2 per cent offset proof stress and 1.5 per cent elongation, were found to be appropriate for the alloys tested. The best base metal alloys are not superior to Type IV gold alloy for the retentive spring members on partial denture frameworks.