title: [Comparative studies on different full and veneer-ceramic crowns].
abstract: Under quasi-clinical conditions, Dicor, Hi-Ceram, Ceraplatin and PFM (porcelain butt margin) crowns with ceramic shoulders manufactured by commercial laboratories for the same metal master die were examined for marginal defects under the electron microscope. With equal cementing conditions and points of measurement for all crowns, the PFM crowns were found to be significantly superior to the other crown types. However, this result becomes relativistic in view of the great statistical variances involved.
authors.forename: E J
authors.initials: EJ
authors.lastname: Richter
authors.forename: K
authors.initials: K
authors.lastname: Bieniek
authors.forename: H
authors.initials: H
authors.lastname: Küpper
mesh_terms: D003442:Crowns; D003722:Dental Alloys; D003763:Dental Leakage; D003776:Dental Porcelain; D003801:Dental Veneers; D008854:Microscopy, Electron; D013499:Surface Properties
chemical_list: D003722:Dental Alloys; D003776:Dental Porcelain
vernacular_title: Vergleichende Untersuchungen an verschiedenen Voll- und Verblendkeramikkronen.