Global Journal of Oral Science

Global Journal of Oral Science - Volume 1

Survival and Success Rates of Short Straumann Implants Placed in the Mandible: A Retrospective Study with up to 5 Year Follow-Up

Published on: 14 September 2015

Pages: 1-8

David French1, Nabil Nadji1 and Hannu Larjava2

1Room 380, J.B. Macdonald Building, The University of British Columbia, 2199 Wesbrook Mall, Vancouver, BC V6T 1Z3 and 2University of British Columbia, Faculty of Dentistry, Department of Periodontics, Room: JBM 366, 2199 Wesbrook Mall, Vancouver, British Columbia, Canada, V6T 1Z3.

Abstract: Aims: The purpose of this retrospective, non-interventional, open cohort study is to report on short implants (8 mm’s and less) as used to treat severe atrophic ridges in absence of bone graft.

Materials and Methods: Retrospectively all Straumann implant implants of length 6 and 8 mm that were placed in the posterior mandible with no bone graft were evaluated (N= 720). Implant restorations were all splinted together. Bone levels were evaluated at 12 months then at 1-2 year intervals up to 5 years.

Results: Among the 720 implants placed, the overall 5-year survival rate was 100%. The overall cumulative success rate of all implants was 95.8% at 3 years and 93.4% at 5 years, respectively. Success rates of the 6 mm implants were 92.3% and 90.5% at 3 and 5 years, respectively. Success rates for the 8 mm implants were found to be 97.2% and 94.6% at 3 and 5 years, respectively. There was no statistically significant difference in the success rates of 6 and 8 mm implants.

Keywords: Short implant, Mandible, Survival, Success, Retrospective, Non-grafted.

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