Long-term follow-up study of osseointegrated implants in the treatment of totally edentulous jaws.
This study reviews the long-term outcome of prostheses and fixtures (implants) in 759 totally edentulous jaws of 700 patients. A total of 4,636 standard fixtures were placed and followed according to the osseointegration method for a maximum of 24 years by the original team at the University of Göteborg. Standardized annual clinical and radiographic examinations were conducted as far as possible. A lifetable approach was applied for statistical analysis. Sufficient numbers of fixtures and prostheses for a detailed statistical analysis were present for observation times up to 15 years. More than 95% of maxillae had continuous prosthesis stability at 5 and 10 years, and at least 92% at 15 years. The figure for mandibles was 99% at all time intervals. Calculated from the time of fixture placement, the estimated survival rates for individual fixtures in the maxilla were 84%, 89%, and 92% at 5 years; 81% and 82% at 10 years; and 78% at 15 years. In the mandible they were 91%, 98%, and 99% at 5 years; 89% and 98% at 10 years; and 86% at 15 years. (The different percentages at 5 and 10 years refer to results for different routine groups of fixtures with 5 to 10, 10 to 15, and 1 to 5 years of observation time, respectively.) The results of this study concur with multicenter and earlier results for the osseointegration method.
Adell
R
R
Faculty of Odontology, University of Goteborg, Sweden.
Eriksson
B
B
Lekholm
U
U
Brånemark
P I
PI
Jemt
T
T
D000328:Adult; D000368:Aged; D003758:Dental Implantation, Endosseous / Q000379:methods* / Q000706:statistics & numerical data; D015921:Dental Implants / Q000706:statistics & numerical data*; D003828:Denture, Overlay; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007575:Jaw, Edentulous / Q000534:rehabilitation; D015993:Life Tables; D008297:Male; D008875:Middle Aged; D016348:Osseointegration; D011379:Prognosis; D011475:Prosthesis Failure; D016019:Survival Analysis
D015921:Dental Implants