| Autor: |
Weng, Dietmar, Jacobson, Zhimon, Tarnow, Dennis, Hürzeler, Markus B., Faehn, Ove, Sanavi, Farshid, Barkvoll, Pål, Stach, Renée M. |
| Předmět: |
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| Zdroj: |
International Journal of Oral & Maxillofacial Implants; May/Jun2003, Vol. 18 Issue 3, p417-423, 7p, 1 Color Photograph, 2 Charts, 7 Graphs |
| Abstrakt: |
Purpose: In this prospective multicenter clinical study, 1,179 3i standard threaded and self-tapping implants were followed for up to 6 years and monitored according to established success criteria. Materials and Methods: A total of 493 patients (240 men and 253 women) with a mean age of 45.1 years at implant surgery were enrolled at 6 research centers after being screened for exclusion criteria. Implants were placed according to a 2-stage surgical protocol with a minimum of 4 months of submerged healing in the mandible and 6 months in the maxilla. Restorations included 633 prostheses, the majority of which were fixed partial dentures in the posterior mandible or maxilla or single-tooth replacements in the anterior maxilla. Results: One hundred four implants (8.8%) did not meet success criteria and were designated as failures, and 222 implants (18.8%) were lost to follow-up. The umulative success rate according to life table methods was 91.1% at 6 years. Discussion: Sixty percent of the failed implants were short (= 10 mm long), and their cumulative success rate as a group at 6 years was 89.0%, compared to 93.1% for longer implants (P < .05). Thirty-three percent of all failures were implants placed in the posterior maxilla, for a 5-year cumulative success rate of 87.4%. Conclusion: It appears that limited bone dimensions and poor-quality bone have an impact on the performance of these machined-surface implants. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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