title: Fabrication of a customized tray for preventing fracture of isolated abutment teeth in definitive casts.
abstract: Isolated abutment teeth with advanced bone resorption on definitive casts for a partial removable dental prosthesis can fracture when the definitive cast is removed from the impression or during subsequent laboratory procedures. This report describes a technique that avoids fracture of the definitive cast during its fabrication. A separating line is formed on the custom tray, which enables removal of the definitive cast without fracturing the isolated tooth. In addition, if the cervical line is sharp and appears compromised, then the impression can be trimmed at the clinical cervical line to enlarge the abutment diameter and increase its resistance to fracture without altering the shape of critical areas.
authors.affiliation: Research Associate, Department of Geriatric Dentistry, School of Dentistry, Showa University, Tokyo, Japan. Electronic address: isobeaki@dent.showa-u.ac.jp.
authors.forename: Akio
authors.initials: A
authors.lastname: Isobe
authors.affiliation: Professor, Department of Geriatric Dentistry, School of Dentistry, Showa University, Tokyo, Japan.
authors.forename: Yuji
authors.initials: Y
authors.lastname: Sato
authors.affiliation: Associate Professor, Department of Geriatric Dentistry, School of Dentistry, Showa University, Tokyo, Japan.
authors.forename: Noboru
authors.initials: N
authors.lastname: Kitagawa
authors.affiliation: Instructor, Department of Geriatric Dentistry, School of Dentistry, Showa University, Tokyo, Japan.
authors.forename: Osamu
authors.initials: O
authors.lastname: Shimodaira
mesh_terms: D000044:Dental Abutments; D003735:Dental Casting Technique / Q000295:instrumentation; D003761:Dental Impression Technique / Q000295:instrumentation*; D003764:Dental Materials / Q000737:chemistry; D003779:Denture Design; D003832:Denture, Partial, Removable; D004867:Equipment Design; D004868:Equipment Failure; D003765:Models, Dental; D013499:Surface Properties; D014885:Waxes / Q000737:chemistry
chemical_list: D003764:Dental Materials; D014885:Waxes