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A 5‐year prospective clinical study of Astra Tech dental implants supporting fixed bridges or overdentures in the edentulous mandible
Author(s) -
Makkonen Tuula A.,
Holmberg Stig,
Niemi Lief,
Olsson Cecilia,
Tammisalo Tapio,
Peltola Juha
Publication year - 1997
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1034/j.1600-0501.1997.080605.x
Subject(s) - astra , dentistry , medicine , mandible (arthropod mouthpart) , orthodontics , dental prosthesis , implant , surgery , botany , biology , genus , physics , quantum mechanics
In a 5‐year prospective clinical study, 1.55 endosseous implants were installed in the mandible anterior to the mental foramina in 33 edentulous patients (13 males and 20 females). Usually 6 implants were installed for fixed prostheses (FP). 13 patients with 77 implants, and 4 implants for overdentures (OD) with a Dolder bar, 20 patients with 78 implants. At the time of abutment connection 1 implant in 2 patients was found to be loose and removed. However, in both these patients overdentures were successfully placed on the remaining 3 implants. Narrow‐beam radiography was used for radiological evaluation. The mean (SD) total marginal bone loss in 5 years was 0.48 (0.38) mm (0.36 (0.22) mm in the FP group and 0.56 (0.45) mm in the OD group). Very few complications were reported during the 5 years, most of them being related to the superstructures. The overall cumulative implant survival rate was 98.7%(100% in the FP group and 97.4% in the OD group). The survival rate of the superstructures was 100%. The present study has demonstrated that Astra Tech implants offer reliable and predictable medium‐term support for fixed prostheses and overdentures in the edentulous mandible.