Implant Supported Overdenture
It’s a denture that uses precision dental attachments to hold the denture down. The most common reason is the looseness of a lower denture which can move as much as 1/2 an inch both horizontally and vertically during functions of eating and speaking. Denture wearers who have an implant supported lower denture often opt to have the upper denture done with implants due to the dramatic improvement in the stability of the lower one.
Another method is a connection of titanium bars, called a mesio bar, which forms a frame. The denture seats firmly onto this frame and can even be removed daily by the patient for easier cleaning. With ovedenture, the patient still has sensory input sensations similar to that experienced with naturals teeth and a more natural directional sense in their chewing activities.
The images below show these two common designs. Most of a tooth crown is removed. A root canal therapy is used for this purpose. The forces of chewing are redirected onto the implants, which are better prepared to handle the stress than the narrow ridges of bone underneath a denture. This procedure results in less bone loss and more stability for the denture.
There are a variety of methods that attach the denture to the implants. Types of overdentures include bar joint dentures and telescopic dentures. An overdenture fastens a denture to the jawbone much in the way natural teeth are anchored. When placed properly, the implants can be combined with other implants to form a fixed or non-removable bridge, which replaces the denture. This type can only be removed by a dentist.