[Stereognathograph--optoelectronic device for mandible movement recording]

The authors have presented the structure and potentiality of application of a new optoelectronic device called stereognathograph recording the function of mandibular condyles. The meter circuit of this device is placed on the sick's head and connected with the mandible's teeth by means of a peridental splint. It enables to record mandible's movements and in the view onto the horizontal and pterygoid plane and determine the mandibular condyles' position in relation to the chosen reference point in terms of measurable numerical three-dimensional quantities. Furthermore this device enables to designate the axis of rotation of mandibular condyles as well as to designate Bennet's angle and pterygoid angle precisely for individual setting of the SAM-2 articulator.