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Implant supported overdentures--the Copenhagen experience
1Department of Prosthetic Dentistry, University of Copenhagen, Denmark.
Journal of Dentistry
|January 1, 1997
Summary
Two dental implants can effectively support an overdenture in the lower jaw, offering a well-functioning prosthesis. This implant-supported overdenture treatment demonstrates high patient satisfaction with minimal bone loss over time.
Area of Science:
- Dental Implantology
- Prosthodontics
- Oral Rehabilitation
Background:
- Implant-supported overdentures offer a stable solution for edentulous patients.
- Assessing the long-term functional and biological outcomes is crucial for treatment success.
Purpose of the Study:
- To evaluate the functional and biological effects of implant-supported overdenture treatment in the mandible.
- To assess patient satisfaction and complications associated with this treatment modality.
Main Methods:
- A consecutive series of 32 patients received Astra Tech implants (3.5 mm diameter, >10 mm length) for mandibular overdentures.
- Two attachment methods were employed: bar-supported and ball-supported overdentures.
- A 4-5 year follow-up period was used to monitor outcomes.
Main Results:
- A single implant failure occurred out of 69 placed fixtures.
- Mean annual bone loss was below 0.2 mm.
- Complications included 15 ball attachment fractures and 26 matrix loosening episodes. Patient satisfaction was high, though 7 patients reported poor control of their opposing upper denture.
Conclusions:
- Two strategically placed implants are sufficient to support a mandibular overdenture when bone quality and quantity are adequate.
- Implant-supported overdentures provide a functional and satisfactory prosthetic solution for the lower jaw.