title: [Dynamic strength of cast endodontic post systems].
abstract: Different endodontic post systems--Permador metal posts, GT posts, Para posts, and Erlangen posts--have been compared with each other in a study. After casting a Pd-Ag-Sn-In-alloy to the posts, these experimental post-retained cores were fixed with zinc phosphate cement in the prepared root canals of extracted premolars and subjected to fatigue tests. With the parameters selected, the forces could be reduced to 22.5N, thus approximating physiological conditions. This test was followed by a thorough inspection of the material (EDS analysis, metallographic preparations, SEM). The Permador post showed the highest dynamic strength, while the Erlangen post material was found to be unsuitable for casting to two different palladium-base alloys.
authors.forename: D
authors.initials: D
authors.lastname: Bruhn
mesh_terms: D003442:Crowns; D003722:Dental Alloys; D003799:Dental Stress Analysis; D010165:Palladium; D011176:Post and Core Technique
chemical_list: D003722:Dental Alloys; D010165:Palladium
vernacular_title: Die dynamische Festigkeit von angussfähigen Wurzelstiften und -stiftsystemen.