“…Careful evaluation of decreased VDO, by using evidences of loss of posterior support, history of wear, phonetics, interocclusal distance, and facial appearance, is probably one of the most important steps in full mouth rehabilitation for these patients. Patients with reduced VDO can use ORPDs instead of occlusal splint to accurately evaluate their proper VDO [3,4,12]. Long term observations have confirmed that for the majority of patients, moderate alteration to the OVD may be well tolerated.…”