title: A technique to ensure the reproducibility of a cast post and core.
abstract: The post-and-core pattern duplication technique is a simple, cost-effective, and accurate method of ensuring the reproducibility of a cast post and core. An acrylic resin pattern is fabricated for an endodontically treated tooth. The post portion of the pattern is duplicated with a polyvinyl siloxane impression material in the lower compartment of a container. The core portion is then duplicated with a polyether impression material in the upper compartment. After the original pattern has been retrieved, the duplicate resin pattern is fabricated in the provided space. This technique will improve efficiency if damage or loss of the pattern or the actual cast post and core occurs.
authors.affiliation: Resident, Department of Post-graduate Prosthodontics, School of Dental Medicine-Boston University, Boston, Mass. Electronic address: Haitem.Naas@yahoo.com.
authors.forename: Haitem M M
authors.initials: HM
authors.lastname: Naas
authors.affiliation: Clinical Associate Professor, Department of Post-graduate Prosthodontics, School of Dental Medicine-Boston University, Boston, Mass.
authors.forename: Mohammad Hossein
authors.initials: MH
authors.lastname: Dashti
authors.affiliation: Clinical Instructor, Department of General Dentistry, School of Dental Medicine-Boston University, Boston, Mass.
authors.forename: Roxana
authors.initials: R
authors.lastname: Hashemian
authors.affiliation: Resident, Post-graduate Endodontics, Department of Endodontics, School of Dental Medicine-Boston University, Boston, Mass.
authors.forename: Nedda Y
authors.initials: NY
authors.lastname: Hifeda
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D003735:Dental Casting Technique; D003760:Dental Impression Materials / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry; D017267:Dental Prosthesis Design / Q000592:standards*; D006801:Humans; D008768:Methylmethacrylates / Q000737:chemistry; D058105:Polymerization; D011145:Polyvinyls / Q000737:chemistry; D011176:Post and Core Technique / Q000592:standards*; D015203:Reproducibility of Results; D012833:Siloxanes / Q000737:chemistry; D019553:Tooth, Nonvital / Q000534:rehabilitation; D014885:Waxes / Q000737:chemistry
chemical_list: D000180:Acrylic Resins; D003760:Dental Impression Materials; D003764:Dental Materials; C082318:GC Pattern Resin; D008768:Methylmethacrylates; D011145:Polyvinyls; D012833:Siloxanes; D014885:Waxes; C034183:vinyl polysiloxane