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Related Experiment Videos

Bone behavior around sleeping and non-sleeping implants retaining a mandibular hinging overdenture.

I Naert1, S Gizani, D van Steenberghe

  • 1Department of Prosthetic Dentistry, Faculty of Medicine, Catholic University Leuven, Belgium. Ignace.Naert@Med.kuleuven.ac.be

Clinical Oral Implants Research
|April 29, 1999
PubMed
Summary

Submerged ("sleeping") dental implants experienced less marginal bone loss compared to non-sleeping implants over ten years. This suggests surgical trauma may cause bone loss around non-sleeping implants.

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Area of Science:

  • Dental Implantology
  • Oral Surgery
  • Periodontology

Background:

  • Dental implants have been used since 1984 to support hinging overdentures.
  • An extra submerged implant was placed as a rescue option in case of failure of the primary implants.

Purpose of the Study:

  • To compare marginal bone loss around submerged (sleeping) and non-sleeping dental implants used for overdenture retention.

Main Methods:

  • A longitudinal study involving 20 edentulous patients receiving 3 implants (Brånemark system) between 1984-1987.
  • Retroalveolar radiographs were taken at abutment installation and after 10 years to assess marginal bone levels.

Main Results:

  • Non-sleeping implants lost an average of 0.33 mm (right) and 0.57 mm (left) of marginal bone.

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  • Sleeping implants lost an average of only 0.16 mm of marginal bone over the 10-year period.
  • Individual implant bone loss did not exceed 1.6 mm for non-sleeping and 0.7 mm for sleeping implants.

    • Conclusions:

    • Non-sleeping implants exhibited greater marginal bone loss compared to sleeping implants.
    • Surgical trauma during abutment connection is hypothesized as the primary cause of bone loss around non-sleeping implants.