title: An Investigation into the Accuracy of Two Currently Available Dental Impression Materials in the Construction of Cobalt-Chromium Frameworks for Removable Partial Dentures.
abstract: This study investigated the suitability of irreversible hydrocolloid as an impression material for cobalt-chromium framework construction. Scans of casts derived from (1) alginate and (2) addition-cured polyvinylsiloxane impressions were superposed on to a control. The differences within and between groups were compared at fixed landmarks. The investigation revealed a high degree of scan coincidence within and between groups. However, certain features, such as undercuts, resulted in a lower degree of scan coincidence. Irreversible hydrocolloid appears to be a viable alternative to addition-cured polyvinyl-siloxane as an impression material for cobalt-chromium framework construction.
authors.forename: Rajesh Kumar
authors.initials: RK
authors.lastname: Dubal
authors.forename: Tim
authors.initials: T
authors.lastname: Friel
authors.forename: Philip D
authors.initials: PD
authors.lastname: Taylor
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000464:Alginates / Q000737:chemistry*; D002133:Calcium Sulfate / Q000737:chemistry; D002858:Chromium Alloys / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D003734:Dental Casting Investment / Q000737:chemistry*; D003760:Dental Impression Materials / Q000737:chemistry*; D003761:Dental Impression Technique / Q000295:instrumentation; D003764:Dental Materials / Q000737:chemistry; D003779:Denture Design; D003832:Denture, Partial, Removable; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008422:Materials Testing; D018613:Microscopy, Confocal; D003765:Models, Dental; D011145:Polyvinyls / Q000737:chemistry*; D012833:Siloxanes / Q000737:chemistry*; D012834:Silver / Q000737:chemistry; D013499:Surface Properties
chemical_list: D000180:Acrylic Resins; D000464:Alginates; D002858:Chromium Alloys; D020099:Coated Materials, Biocompatible; D003734:Dental Casting Investment; D003760:Dental Impression Materials; D003764:Dental Materials; D011145:Polyvinyls; D012833:Siloxanes; C034183:vinyl polysiloxane; D012834:Silver; D002133:Calcium Sulfate