A comparison of empirical centric relation records with location of terminal hinge axis and apex of the Gothic arch tracing

Abstract

T h e , problem of acquiring and transferring dependable jaw relation records has long been of interest to prosthodontists. Astute observers have realized the importance and necessity 6f the centric jaw relation position for the development of an occlusion that is in harmony with the entire stom~ tognathic system. Present clinical procedures dictate an even greater interest in accurate jaw relation records. The development of air turbine cutting instruments, fully adjustable articulatgrs, indirect impression techniques, and improved casting procedures has influenced the profession to a greater acceptance of the concept of complete occlusal reconstruction. We know that nature provides a centric relation position at birth and that, at about age 23 months, the mandible exhibits all possible movement, centric occlusaI position is coincident with centric relation position, and an occlusal sense is developed. ~ Throughout life, occlusions are subjected to wear, loss, and repositioning of teeth until 75 per cent of the adult population exhibits a habitual vertical position of occlusion anterior and/or lateral to the centric jaw relation position. ~