The reproducibility of pantographic tracings on medicated and nonmedicated subjects.

Tracings were made on three patients using a modified pantographic device. The tracings were made on glass flags with wax, etched, and superimposed. The effects of body position and modification were investigated. From this research project the following can be concluded: 1. A precise method has been developed which permits superimposition of pantographic tracings for analysis. 2. There is a significant difference in reproducibility between medicated and nonmedicated subjects. 3. The percentage coincidence of border tracings increases significantly when the patient is pantographed while under the influence of medication (Valium). 4. The angulation of the body does not appear to be significant for reproducing border tracings. 5. There appears to be no significant difference in the reproducibility of the border tracings relative to time (1, 1 1/2, 2, and 2 1/2 hours) after medication. 6. The lateral side shift of the jaw cannot always be reproduced accurately. 7. The neuromusculature appears to be the overriding factor governing border movements.