Recording centric and eccentric occlusal disturbances with a new recording device.

A recording device termed a "Kleinrok Functiograph" was introduced to simultaneously document condylar- and tooth-guided mandibular movements on the same plate. The Functiograph instrument permitted objective monitoring of mandibular movement without tooth contact, with all tooth contacts, and allowed analysis of the correlation of these two recordings. After 10 years of conducting investigations on centric occlusion using the Functiograph instrument combined with clinical, radiographic, and electromyographic studies, it was possible to differentiate the horizontal Functiograph recordings of normal and disturbed centric occlusion at a clinically acceptable vertical dimension. Two types of centric occlusal disturbances were classified to accelerate diagnosis and standardize communication.