Removable Partial Denture Repair for Missing Teeth: Using the remaining natural teeth and the mucous membranes and bone tissues covered by the denture base for support, relying on the denture retainer and the base for retention, the patient is able to take off and wear the restorations on his/her own. Full denture restoration for missing teeth: when the teeth are missing, the chewing function is lost, the shape of the jaw and face is changed, the cheeks are collapsed, the wrinkles are increased, and the face is aging. Therefore, the missing teeth should be restored with denture.