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Implant treatment of patients with edentulous jaws: a 20-year follow-up
Umeå University, Faculty of Medicine, Department of Odontology, Oral and Maxillofacial Radiology.
Umeå University, Faculty of Medicine, Department of Odontology, Prosthetic Dentistry.
Umeå University, Faculty of Medicine, Department of Odontology, Prosthetic Dentistry.
2008 (English)In: Clinical Implant Dentistry and Related Research, ISSN 1523-0899, E-ISSN 1708-8208, Vol. 10, no 4, 207-217 p.Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: Implant-supported prostheses are today often used in rehabilitation of partially or totally edentulous patients. Both patients and the dental profession often regard implant treatment as successful in a life perspective. Therefore, studies with a long-term follow-up are important.

PURPOSE: The aim was to investigate the outcome of implant treatment with fixed prostheses in edentulous jaws after 20 years, with special reference to survival rate of implants and prostheses and frequency of peri-implantitis.

MATERIALS AND METHODS: The patient material was a group of patients treated in the early 1980s. The original patient group comprised the first 48 consecutive patients treated with implant-supported prostheses at Umeå University. All patients were edentulous in one or two jaws. The patients had a mean age at the implant insertion of 54.3 years (range 40-74). At the planning of this study 20 years after treatment, 19 of the 48 patients were found to be deceased. Of the 29 patients still alive, 21 patients with altogether 23 implant-supported prostheses could be examined clinically and radiographically. All patients were treated ad modum Brånemark (Nobel Biocare AB, Göteborg, Sweden) with a two-stage surgical procedure. The implants had a turned surface. Abutment connections were performed 3 to 4 months after fixture insertion in the mandible, and after a minimum of 6 months in the maxilla. The prostheses were fabricated with a framework of gold alloy and acrylic artificial teeth.

RESULTS: The 21 patients (with 23 implant prostheses) examined had at the time of treatment got 123 implants (27 in the upper jaw and 96 in the lower jaw) inserted. Only one of these implants had been lost (about 2 years after loading) giving a survival rate of 99.2%. Very small changes occurred in the marginal bone level. Between the 1 and 20-year examinations, the mean bone loss was 0.53 mm and the mean bone level at the final examination was 2.33 mm below the reference point.

CONCLUSIONS: This follow-up over two decades of implant-supported prostheses demonstrates a very good prognosis for the treatment performed. The frequencies of peri-implantitis, implant failures, or other complications were very small, and the original treatment concept with a two-stage surgery and a turned surface of the implants will obviously give very good results.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2008. Vol. 10, no 4, 207-217 p.
Keyword [en]
Brånemark implants, edentulous jaws, complete prostheses, long-term follow-up
National Category
Dentistry Surgery
Research subject
URN: urn:nbn:se:umu:diva-26352DOI: 10.1111/j.1708-8208.2007.00081.xISI: 000260527600001OAI: diva2:241979
Available from: 2009-10-06 Created: 2009-10-06 Last updated: 2015-09-08Bibliographically approved

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Ahlqvist, JanGunne, JohanNilsson, Hans
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