title: Ensuring accuracy and predictability with double-arch impressions.
abstract: The described double-arch impression technique provides an accurate and stable impression, accurate dies and the ability to make one or two crowns with minimal or no adjustments. Both scientific evidence and clinical observation attest to the adequacy of the double-arch impression concept, when it is accomplished in accordance with the requirements enumerated in this column.
authors.affiliation: CR Foundation, 3707 N. Canyon Road, Provo, UT 84604, USA.
authors.forename: Gordon J
authors.initials: GJ
authors.lastname: Christensen
mesh_terms: D003442:Crowns; D003760:Dental Impression Materials / Q000737:chemistry; D003761:Dental Impression Technique / Q000295:instrumentation / Q000592:standards; D004867:Equipment Design; D004987:Ethers / Q000737:chemistry; D006801:Humans; D011145:Polyvinyls / Q000737:chemistry; D012117:Resins, Synthetic / Q000737:chemistry; D012833:Siloxanes / Q000737:chemistry
chemical_list: D003760:Dental Impression Materials; D004987:Ethers; D011145:Polyvinyls; D012117:Resins, Synthetic; D012833:Siloxanes; C034183:vinyl polysiloxane