When one loses all  teeth complete dentures can be constructed.  Teeth gets support from underlying bone of the jaw.

Dentures need to be checked  regularly by the dentist because the mouth changes and the denture may not fit as well as it should and may require a reline.

If only a few roots can be saved which are strong enough, an Overdenture, which is a denture which attaches to a couple of roots anchored in the jaw can be constructed. An Overdenture is a denture that uses precision dental attachments to hold the denture down. The overdenture attachment can be placed in tooth roots that have been saved.

An immediate denture is constructed before teeth are removed so that one will not have to remain without any teeth. Constructing immediate dentures involves taking impressions (making copies) of your mouth before the teeth are removed. When your remaining teeth are removed the denture can be inserted immediately.

Post operative visits will be required to check the extraction sites and make required adjustments to the dentures. 

Because the mouth will change after it heals, your dentures will need to be evaluated at 3 month intervals and will need to be relined to fit the changes that have occurred in your mouth.

Dental Implants are screws made up of titanium metal and resemble tooth roots. Holes are made into the jaw bones and implants are placed and covered over. The implants then heal and integrate with the jaw. After healing an artificial top is placed into the implant containing an attachment for dentures. A dental implant provides a foundation to hold down a denture and hold it firmly in place.

Dental implants provide a stable foundation for a denture for someone who has lost all of their natural teeth. It is estimated that implant supported dentures will restore nearly 90% of chewing ability.

A full denture is difficult for many patients to wear and get used to. Sore spots and difficulty in chewing is caused when a denture moves around in the mouth. Over the period of time the dental ridges required to support a denture will shrink creating a problem keeping dentures in place.

Implants can be utilized to hold the denture in place. There will be a major improvement in fit and function. 
Lower dentures require 2 or 4 implants to properly hold them in place for normal function. 2 implant supported denture will be implant and tissue supported denture while with 4 implants it will be totally implant  supported denture.  
Although implants are usually placed for stability of lower dentures, implants can also be placed to add to the stability of upper dentures. 

The success rate of properly cared implants is approximately 95%.

A removable partial denture fills in the space created by missing teeth and fills out your smile. A denture helps you to properly chew food, a difficult task when you have missing teeth. In addition, a denture may improve speech and prevent a sagging face by providing support for lips and cheeks

Removable partial dentures usually consist of replacement teeth attached to pink or gum-colored acrylic base, which are connected by metal framework. Removable partial dentures attach to your natural teeth with metal clasps or devices called precision attachments. Precision attachments are generally more esthetic than metal clasps and they are nearly invisible. Crowns on your natural teeth may improve the fit of a removable partial denture and they are usually required with attachments. Dentures with precision attachments generally cost more than those with metal clasps. Consult with your dentist to find out which type is right for you.

It is advisable to wait for at least 4 weeks after the extraction of teeth before the dentist can initiate the process of denture construction. This gives sufficient time for the extraction wound to heal and for the underlying bone to remodel.