Implant-supported dentures and overdentures
A denture that clips onto implants is a different treatment from a fixed full-arch bridge. Here is how it works, and what to ask about it.
What an implant-supported denture is
An implant-supported denture, often called an overdenture, is a removable denture that attaches to implants in the jaw. Small fittings inside the denture clip onto matching attachments on the implants, or onto a bar that joins the implants. The denture is taken out at home for cleaning and put back in.
Overdentures are most often discussed for the lower jaw, where a conventional full denture has less to hold onto, but they can be used in the upper jaw too. The number of implants varies, and two is a common starting point for a lower overdenture. The treating dentist decides what is suitable.
How it differs from a fixed full-arch bridge
A fixed full-arch bridge, such as an All-on-4 style bridge, is screwed to the implants and stays in. An overdenture is removable. The overdenture usually needs fewer implants and less laboratory work, and it covers more of the gum, which can help support the lips and cheeks. A fixed bridge does not come out at home, which some people prefer.
These are different treatments with different upkeep. Our page on All-on-4 and full-arch implants explains the fixed option, and our guide to implants, bridges and dentures compares the main treatment types.
If you already wear a denture
Some people who already wear a full denture ask whether implants can be added to hold it. Sometimes an existing denture can be adapted to fit attachments, and sometimes a new denture is made. A dentist will check the fit and condition of the current denture, the bone and the gums before advising.
Attachments inside an overdenture wear with use and are replaced from time to time, and the denture itself may need relining as the gums change. Ask the practice what routine maintenance involves and whether it is included.
Medical aid and dentures on implants
South African medical schemes often treat the implant stages and the denture or prosthesis differently, and the rules change by scheme, plan and year. Our guide to medical aid and dental implants explains what to ask your scheme, including pre-authorisation and which procedure codes the practice will use.
What influences the cost
We do not publish prices. The practice that assesses you gives you a treatment plan and a quote for your case. These are the factors that usually make the difference:
- The number of implants and whether a bar joins them.
- Whether the existing denture can be adapted or a new one is made.
- The type of attachment used.
- Extractions or bone grafting, if needed.
- Planning imaging.
- Laboratory work for the denture.
- Routine replacement of attachment parts and relining over time.
- How your medical aid treats the implants and the denture.
Our guide to what influences a dental implant quote explains how to read an itemised plan.
Frequently asked questions
Is an overdenture removable?
Yes. It clips onto the implants and is taken out at home for cleaning. A fixed full-arch bridge is the non-removable alternative.
How many implants hold an overdenture?
It varies. Two is a common starting point for a lower overdenture, but the number is a clinical decision based on your jaw and the design.
Can my current denture be used?
Sometimes it can be adapted to fit attachments. A dentist checks its fit and condition first; in some cases a new denture is made.
Does an overdenture need maintenance?
Yes. Attachment parts wear and are replaced from time to time, and the denture may need relining. Ask what this involves and costs.