Complete dentures or Full dentures are used when all the teeth are missing . Complete dentures can be either “conventional” or “immediate”. The framework of complete dentures may be made of resin, metal or a combination. Implant supported overdentures are an alternate to conventional dentures whereby a full dentures is placed over the dental implants with metal bar/balls that gives better retention.

Partial dentures are used when some natural teeth remain. 
A removable partial denture usually consists of replacement teeth attached to a pink or gum-colored plastic base, which is connected by metal clasps or precision attachments that holds the denture in place in the mouth. Precision attachments are generally more esthetic than metal clasps and they are nearly invisible.

Conventional Dentures are made after the teeth have been removed and the gum tissue has begun to heal. Conventional dentures is ready for placement in the mouth about 8 to 12 weeks after the teeth have been removed.

Immediate dentures are made in advance and can be positioned as soon as the teeth are removed. As a result, the wearer does not have to be without teeth during the healing period. However, bones and gums shrink over time, especially during the healing period following tooth removal therefore immediate dentures would usually require more adjustments to fit properly during the healing process and generally should only be considered a temporary solution until conventional dentures can be made. The healing process as it can take months for your bone and tissue to stabilize after tooth extractions.