Castability evaluation and effect of recasting of ceramo-metal alloys.
This study was conducted to assess the castability of four ceramo-metal alloys including three base metal alloys (nickel-chromium, cobalt-chromium, and titanium) as well as a gold alloy as control. The mesh test pattern was used to produce a total of 20 cast samples, five for each. The percent castability value was calculated by counting complete segments of a cast alloy grid. Effect of recasting on the castability was evaluated using fresh and cast alloys in the ratio of 50:50, cast into the mesh design. Results revealed a superior percent castability values for gold alloy with comparable results produced by the Ni-Cr alloy while Titanium alloy displayed the least values. Recasting elicited a significant decrease in castability for Titanium alloy whereas other investigated alloy systems were not significantly affected. Laboratory castability evaluation is a valuable tool for both selecting and using dental materials for producing cast restorations.
Mosleh
I
I
Department of Fixed Prosthodontics, Faculty of Oral and Dental Medicine, Cairo University.
Abdul-Gabbar
F
F
Farghaly
A
A
D000704:Analysis of Variance; D002858:Chromium Alloys; D003735:Dental Casting Technique / Q000706:statistics & numerical data; D006047:Gold Alloys; D016876:Metal Ceramic Alloys; D008669:Metallurgy; D014025:Titanium
D002858:Chromium Alloys; D006047:Gold Alloys; D016876:Metal Ceramic Alloys; D014025:Titanium