title: A comparison of the accuracy of two removable die systems with intact working casts.
abstract: This study evaluated the reproducibility of die position using two removable die systems and two die stones. Poly(vinyl siloxane) impressions were made of a stainless steel, U-shaped arch with four evenly spaced abutments. Six groups were evaluated: Zeiser system/Fuji Rock; Zeiser system/Die Keen; solid cast/Fuji Rock; solid cast/Die Keen; Fuji Rock/Pindex; and Die Keen/Pindex. An optical comparator was used to measure the height of each abutment, the distance between the anterior abutments, and the distance between the posterior abutments. The Zeiser system with either Fuji Rock or Die Keen yielded the greatest accuracy. Die Keen exhibited more linear expansion than Fuji Rock, and solid casts had less distortion than the Pindex system.
authors.affiliation: Department of Biomaterials, Boston University, Goldman School of Graduate Dentistry, Massachusetts 02118.
authors.forename: P
authors.initials: P
authors.lastname: Aramouni
authors.forename: P
authors.initials: P
authors.lastname: Millstein
mesh_terms: D000704:Analysis of Variance; D002133:Calcium Sulfate; D000044:Dental Abutments; D003735:Dental Casting Technique / Q000295:instrumentation*; D003761:Dental Impression Technique / Q000295:instrumentation; D006801:Humans; D003765:Models, Dental; D015203:Reproducibility of Results
chemical_list: D002133:Calcium Sulfate