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Implant survival rates in partially edentulous patients: a 3-year prospective multicenter study
K W Higuchi1, T Folmer, C Kultje
1Department of Periodontics, University of Amsterdam, The Netherlands.
Purpose:
This multicenter investigation is an interim 3-year survival report of a 5-year prospective study using Brånemark osseointegrated implants in partially edentulous patients.
Materials And Methods:
Previously defined patient characteristics and clinical parameters were related to implant survival using lifetable analysis.
Results:
Three years after prosthesis insertion, 460 implants placed in 139 patients remained in the study. Cumulative success rates for maxillary implants (92.5%) were less than for mandibular implants (94.8%), with an overall cumulative success rate of 93.9%.
Conclusion:
Failures were associated with poor bone quality, smaller implant sizes, and a higher plaque index, and were more likely to occur before loading. A 4% incidence of residual long-term inferior alveolar nerve paresthesia was higher than previously reported.