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Volume 14 , Issue 5
September/October 1999

Pages 748–755

Long-Term Results After Placement of Dental Implants: Longitudinal Study of 1,964 Implants over 16 Years

Nicole Noack, MD, Jürgen Willer, DMD, Jürgen Hoffmann, MD, DMD

PMID: 10531748

In a retrospective study, Kaplan-Meier implant survival analyses were conducted on 883 patients with 1,964 implants of various systems placed, followed up, documented, and statistically evaluated at an oral surgery and dentistry practice between January 1981 and January 1997. The goal of this study was to evaluate the success of osseointegrated implants of the Brånemark, Frialit-1 (Tübinger Implant), Frialit-2, and IMZ systems and Linkow blade implants. For all systems, mandibular implants were generally more successful than maxillary implants. The preprosthetic loss rate was 1.9%, and 4.3% of implants were lost after prosthetic treatment. The lowest loss rates were seen with implants in intermediate and distal extension spaces and with single-tooth replacements using IMZ, Frialit-2, and Brånemark implants. In edentulous arches, implants of the IMZ and Brånemark systems had the lowest failure rates. (Int J Oral Maxillofac Implants 1999;14:748–755) Key words: dental implants, longitudinal study, long-term results

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