title: A controlled clinical trial of implant-retained mandibular overdentures: clinical aspects.
abstract: In a controlled clinical trial, treatment effects of mandibular overdentures on two different implant-systems in edentulous patients were compared one year after insertion of the new dentures. The implant-systems used were the Brånemark system (Brå) and the IMZ-system. Treatment was randomly assigned to 60 patients according to a balanced allocation method. Evaluation included peri-implant and radiographical parameters. According to the Delphi method a clinical implant performance scale (CIP) was constructed based on all conceivable complications of the different implant systems. During the osseointegration period, five Brå- and one IMZ-implants were lost. The results of one of the peri-implant parameters and the radiographical score showed significant differences considering the (pseudo) pocket probing depth (Brå better than IMZ, P < 0.001) and the radiographic-score (IMZ better than Brå, P < 0.003). The results for the CIP-scale were less favourable for the Brå-group than for the IMZ-group; however, these differences were not significant.
authors.affiliation: Department of Oral and Maxillofacial Surgery and Maxillofacial Prosthodontics, University Hospital Groningen, The Netherlands.
authors.forename: E M
authors.initials: EM
authors.lastname: Boerrigter
authors.forename: R P
authors.initials: RP
authors.lastname: van Oort
authors.forename: G M
authors.initials: GM
authors.lastname: Raghoebar
authors.forename: B
authors.initials: B
authors.lastname: Stegenga
authors.forename: P J
authors.initials: PJ
authors.lastname: Schoen
authors.forename: G
authors.initials: G
authors.lastname: Boering
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000209:etiology; D003758:Dental Implantation, Endosseous / Q000009:adverse effects; D015921:Dental Implants / Q000009:adverse effects; D003774:Dental Plaque Index; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D003826:Denture, Complete, Lower; D003828:Denture, Overlay; D005260:Female; D006801:Humans; D007575:Jaw, Edentulous / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D008297:Male; D008334:Mandible / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D008875:Middle Aged; D016348:Osseointegration; D010512:Periodontal Index; D010514:Periodontal Pocket / Q000000981:diagnostic imaging / Q000209:etiology; D011859:Radiography
chemical_list: D015921:Dental Implants