“…Repeating these measurements two or three times does not increase precision (Cohen, 1957). Given this wide variability, the clinical relevance of the PVD may be challenged, and many clinicians have proposed determination of the OVD as the primary clinical objective (Nairn, 1976 (Magnusson, 1982;Dahl and Krogstad, 1985) have shown that there is no proof of a link between alteration in OVD and the occurrence of temporomandibular disorder. I The change may be due to loss of teeth (Atwood, 1956), tooth wear (Tallgren, 1957), prosthetic treatment (Swerdlow, 1964;Gross and Ormianer, 1994), or the reduction in alveolar height that occurs in the wearer of complete dentures (Tallgren, 1972;Tallgren and Solow, 1984).…”