One evaluation criterion of a radiograph is vertical distortion, which is relatively more common in periapical radiographs of the mandibular premolar region. This study determined the vertical angle changes that can be tolerated in periapical radiographs of mandibular premolars. The lengths of 30 already extracted mandibular first premolars were measured clinically and radiographically. Periapical radiography projections were obtained with vertical angles set at 00, +100, +150, +200, -100, -150, and -200. Then, tooth length and the difference in cusp height were measured by two observers twice at different times. There was no significant difference in tooth length at vertical angulations of 00, +100, +150, +200, -100, and -150 (P > 0.05). On the other hand, a significant difference was noted in the buccal-lingual cusp difference (P < 0.05). In standard periapical radiography, a 100 change from the normal vertical angulation could be tolerated still to measure the vertical dimension or tooth length of the mandibular first premolar tooth.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 7 Sep 2018|
|Event||2nd Physics and Technologies in Medicine and Dentistry Symposium, PTMDS 2018 - Depok, West Java, Indonesia|
Duration: 18 Jul 2018 → 18 Jul 2018