An overdenture is a special type of denture that sits on top (over) one or more teeth roots for extra support. It can be a partial or complete denture. Overdentures can also sit on top of, and connect into dental implants instead of roots. You may hear these referred to as 'implant dentures' and they are a very good option for helping to stabilise complete dentures particularly the tricky lower one.
Overdentures have the following advantages:
- Prevent resorbtion. It can help prevent resorbtion- maintaining your bone levels and ridge height for a more stable denture.
- Better chewing experience. The roots themselves are held in by ligaments so some feedback about pressure and how hard you are biting is sent to the brain making the chewing experience more real.
- Can use precision attachments. Sometimes the roots can be used with precision attachments such as magnets or ball joints for extra stability and grip.
- Increased grip. The teeth (roots) provide extra support increasing stability and retention.
The teeth should generally have had root canal treatment
or problems with the nerve are likely.
Keeping them, also requires extra care and improved hygiene since the roots can still decay
or get gum disease
around them- being under the denture, there is also a tendancy to collect more plaque.