To reproduce jaw movements, electric distance measuring devices are fixed at the lower jaw and the upper jaw in the mouth of a patient to measure, with relative movements between upper and lower jaws, the distances between defined points of the two jaws and to supply the data to a memory. In accordance...http://www.google.ca/patents/US4330276?utm_source=gb-gplus-sharePatent US4330276 - Process and apparatuses for reproducing jaw movements
