Pantographic reproducibility of mandibular border movements in subjectively normal subjects

Abstract

The Pantographic Reproducibility Index (PRI) has been developed to evaluate mandibular dysfunction through the reproducibility of lateral border movements. There exist no data on the Japanese population regarding PRI. The purpose of this study is to determine the normal range of PRI in normal subjects. Those data will be compared to the patient data and an evaluation of the treatment outcome. Ten male and ten female Japanese who reported no signs and symptoms of Craniomandiubular Disorders were used in this study.1. The average PRI in males was 6.95 (5.93).In females the average was 7.30 (4.45). There was no statistical difference between sexes.2. One male subject showed a PRI at 25 and was classified to the slight dysfunction category suggested by Clayton where as other 19 subjects were classified as normal.3. Within the 24 divided section, the largest PR value was 2 and average varies from 0.03 (saggittal orbiting path early part) to 0.58 (saggittal rotating path later part).