Abstract
0 NE OF THE IMPORTANT RECORDS preparatory to mounting casts on an instrument for the construction of complete upper and lower dentures is the centric jaw relation record. The vertical dimension record is at least of equal importance. Centric jaw relation has been defined as “the most retruded relation of the mandible to the maxillae when the condyles are in the most posterior unstrained position in the glenoid fossae from which lateral movement can be made, at any given degree of jaw separation.“l This statement is inexact. The anteroposterior and lateral relationship between the mandible and the maxillae for a given individual can be recorded at varying degrees of jaw separation. However, a recording at other than the correct vertical dimension is not the true centric jaw relation for this individual. Centric jaw relation is three-dimensional, and the vertical dimension should be considered as one of these three dimensions.
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