title: Wear mechanisms of resin and porcelain denture teeth.
abstract: The aim of this investigation was to describe the wear mechanism in occlusal contact areas of porcelain and acrylic resin denture teeth opposing different dental materials. A 55-year-old man with earlier extensive wear was given two complete dentures, as identical as possible, in the upper jaw. One of the dentures had diatoric teeth in cross-linked resin and the other denture had diatoric teeth in porcelain. The dentures were antagonizing a new gold-acrylic fixed bridge from 46 to 36. Two contralateral segments of the bridge were made as removable double crowns. The removable segments were made in different materials: gold, porcelain, light-cured resin, and heat-cured resin. Wear of the denture teeth was studied by scanning electron microscopy on replica models made after 1 and 2 months of antagonizing contact with the various materials. Wear of both porcelain and modern cross-linked resin teeth was mainly a fatigue type of wear. Abrasion was observed when hard particles were assumed to be part of the wear debris.
authors.affiliation: Department of Prosthetic Dentistry, Faculty of Odontology, Gothenburg University, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Ekfeldt
authors.forename: G
authors.initials: G
authors.lastname: Oilo
mesh_terms: D003776:Dental Porcelain; D003779:Denture Design; D003827:Denture, Complete, Upper; D003830:Denture, Partial, Fixed; D003832:Denture, Partial, Removable; D006801:Humans; D008297:Male; D008768:Methylmethacrylates; D008855:Microscopy, Electron, Scanning; D008875:Middle Aged; D013499:Surface Properties; D014093:Tooth, Artificial
chemical_list: D008768:Methylmethacrylates; D003776:Dental Porcelain