A technique that uses the patient's existing dentures as a valuable part of the complete denture diagnostic evaluation has been presented. 2. The procedures require no more time than most conventional diagnostic techniques and yield much more diagnostic information. 3. The patient can see and feel, to a degree, what new dentures would be like. 4. The dentist can better estimate the time needed to complete a successful denture service. 5. The procedure is beneficial to the dentist and the patient. 6. The dentist can terminate the patient with courtesy when, from the diagnostic procedures with the patient's existing dentures, it is determined that the patient cannot be satisfied.