An overdenture is a removable complete or partial denture that is supported by implants.
Overdentures are suitable for both upper and lower teeth and for a full mouth. They use the bone you have and so avoid the need for bone grafting procedures.
The effect of overdentures is to provide greater stability so that dentures behave much more like normal teeth. The biting pressure can be taken off the gums and directed into the bone like natural teeth.
Overdentures are a good solution for patients who have trouble keeping their dentures in place. Because they hold the dentures in so tightly they remove the necessity of using adhesives. They can also be easily removed for cleaning.