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Implant-supported single-tooth restorations. A 12-year prospective study

Journal article
Authors Mauro Donati
Annika Ekestubbe
Jan Lindhe
Jan Wennström
Published in Clinical Oral Implants Research
Volume 27
Issue 10
Pages 1207-1211
ISSN 0905-7161
Publication year 2016
Published at Institute of Odontology
Institute of Odontology, Section 1
Institute of Odontology, Section 2
Pages 1207-1211
Language en
Keywords bone loss, clinical, dental implants, long-term follow up, radiology, fixed partial dentures, follow-up, 10-year, complications, survival, crowns, cohort, Dentistry, Oral Surgery & Medicine
Subject categories Dentistry


ObjectiveThe aim of this study was to evaluate prospectively the 12-year outcome of implant-supported single-tooth restorations. Material and methodsOriginally 45 self-tapping Astra Tech TiOblast((R)) ST-implants were installed by a two-stage protocol in 40 subjects requiring single-tooth prosthetic replacement for a missing tooth. Clinical and radiologic examinations were performed at completion of the prosthetic treatment 4-7months after implant installation surgery and after 5 and 12years in function. ResultsAt 12years 31 patients and 35 implants were available for evaluation. The overall failure rate after 12years was 10.3% on the subject level and 9.1% on the implant level. The mean bone loss amounted to 0.67mm (SD 2.20) on a subject level and 0.47mm (1.72) on an implant level. Three subjects (10%) and three implants (8.6%) were diagnosed with peri-implantitis. Five subjects had experienced technical complications; three incidences of loosening of the abutment retention screw during the first 5years and two minor porcelain fracture of the crown (two patients) between 5- and 12-years of follow-up. ConclusionThe findings reported in this 12-year prospective case series suggest that the use of the Astra Tech dental implants may be a valid treatment alternative for single-tooth replacement prostheses.

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