title: Submerged alumina dental root implants in humans: five-year evaluation.
abstract: This article describes the placement, success rate, and evaluation of an experimental alumina (Al2O3) ceramic dental implant at a mean placement time of 5 years. The study compared the longevity of a submerged implant of the same root design and a refined surgical technique with previously reported studies of the implant exposed to the human oral environment during initial healing. A 54% success rate was achieved for 29 implants placed in the maxillae and mandible, all restored with cast gold dental crowns. A significant difference (p = 0.05) appeared between success and failures at 7.8 months following placement. Crown/root ratio slopes were an earlier and more sensitive indicator of potential success or failure than the bone height slopes. Computer analysis revealed no apparent correlation between implant mobility and/or pocket depths and implant longevity. Delayed implant root fractures and a cast post fracture occurred in 20% of the implants that survived.
authors.affiliation: Ohio State University, College of Dentistry, Columbus.
authors.forename: M O
authors.initials: MO
authors.lastname: Brose
authors.forename: R J
authors.initials: RJ
authors.lastname: Avers
authors.forename: M R
authors.initials: MR
authors.lastname: Rieger
authors.forename: J E
authors.initials: JE
authors.lastname: Duckworth
mesh_terms: D000535:Aluminum; D000537:Aluminum Oxide; D000539:Alveolar Process / Q000000981:diagnostic imaging; D003758:Dental Implantation, Endosseous / Q000295:instrumentation* / Q000379:methods; D003779:Denture Design; D004868:Equipment Failure; D005069:Evaluation Studies as Topic; D006801:Humans; D008137:Longitudinal Studies; D008334:Mandible / Q000000981:diagnostic imaging / Q000601:surgery; D011176:Post and Core Technique; D011859:Radiography; D013499:Surface Properties; D014092:Tooth Root
chemical_list: D000535:Aluminum; D000537:Aluminum Oxide