Evaluation of the accuracy of linear and angular measurements on panoramic radiographs taken at different positions.

Purpose: This study assessed the accuracy of linear and angular measurements on panoramic radiographs taken at different positions in vitro.

Materials And Methods: Two acrylic models were fabricated from a cast with normal occlusion. Straight and 75° mesially and lingually angulated pins were placed, and standardized panoramic radiographs were taken at standard position, at an 8° downward tilt of the occlusal plane compared to the standard position, at an 8° upward tilt of the anterior occlusal plane, and at a 10° downward tilt of the right and left sides of the model.