title: Long-term changes in marginal and periapical periodontal conditions in patients with fixed prostheses: a radiographic study.
abstract: Patients treated at a prosthodontic department during the years 1968-73 with fixed restorations (at least five units) were followed up in 1991-92. The aim of the present study was to compare marginal and periapical periodontal conditions on radiographs from 1968-73 and 1991-92 and relate the changes to the results of the prosthodontic treatment. In the group in which the restorations remained unchanged, 90% of the abutments that were not root filled and showed no periapical radiolucency when the restorations were placed, were still not root filled and showed no periapical radiolucency at the follow-up examination. The corresponding figure for the group in which the restorations had been replaced was only 69%. The changes in marginal bone levels also differed between the groups. In the group with remaining restorations, 66% of the surfaces were given the same score on a five-point scale both in 1968-73 and in 1991-92. In the other group, only 54% were scored the same on both occasions. Thus, unfavourable changes in both periapical and marginal periodontal conditions were associated with poorer results for the fixed restorations.
authors.affiliation: Department of Prosthetics, Postgraduate Dental Education Center, Orebro, Sweden.
authors.forename: B
authors.initials: B
authors.lastname: Swartz
authors.forename: B
authors.initials: B
authors.lastname: Svenson
authors.forename: S
authors.initials: S
authors.lastname: Palmqvist
mesh_terms: D000328:Adult; D000539:Alveolar Process / Q000000981:diagnostic imaging; D003442:Crowns / Q000009:adverse effects; D000044:Dental Abutments; D003830:Denture, Partial, Fixed / Q000009:adverse effects; D005500:Follow-Up Studies; D006801:Humans; D008137:Longitudinal Studies; D008875:Middle Aged; D010483:Periapical Diseases / Q000000981:diagnostic imaging; D010486:Periapical Tissue / Q000000981:diagnostic imaging*; D010510:Periodontal Diseases / Q000000981:diagnostic imaging; D010519:Periodontium / Q000000981:diagnostic imaging*; D011859:Radiography; D012390:Root Canal Therapy; D016896:Treatment Outcome