title: Evaluation of three variables affecting the casting of base metal alloys.
abstract: All the vented samples with sprue widths of 2 mm or more were defect free, whereas the corresponding unvented samples had extensive voids and porosity in all but one casting. All castings with a sprue width of 1 mm were defective regardless of whether or not vents were used. The thickness of the investment above the pattern had no effect on casting results.
mesh_terms: D003722:Dental Alloys; D003734:Dental Casting Investment; D003735:Dental Casting Technique / Q000295:instrumentation; D005069:Evaluation Studies as Topic; D008768:Methylmethacrylates; D013499:Surface Properties; D013674:Technology, Dental
chemical_list: D003722:Dental Alloys; D003734:Dental Casting Investment; D008768:Methylmethacrylates