[A method for the contact-free computerized visualization of the movements of the head of the mandible in the temporomandibular joint].

A method for recording the functional movements of the head of the temporomandibular joint (TMJ) is proposed. It is based on the use of a special automated image processing system (AIPS) consisting of a TV camera with a feeding block, TV monitor, and a PC. Sixty subjects aged 20-40 years with orthognathic occlusion without maxillodental disease were examined. Contact-free registration included: 1) layout of the skin of the face; 2) videorecording of mandibular movements during special functional tests; and 3) computer processing of results. Contact-free registration of the position of the TMJ head permits objective and highly accurate reproduction of the system of elements of the maxillodental system during prosthesis making and fixation. Comprehensive study of functional movements of the mandible by means of AIPS facilitates orthodontic treatment of patients with abnormal height of the lower part of the face and helps diagnose the joint abnormalities. Contact-free diagnosis decreases and in many cases even rules out unjustified radiation loading of patients in examinations of the maxillodental system.