MANDIBULAR INCISORS

Adjust the head as described for radiographs of mandibular teeth. Place the film packet in the mouth with the long axis vertical. Both the long borders of the packet should be placed under the tongue with the center of the film opposite the midline of the arch and the upper border parallel to and slightly above (approximately 1/8 inch) the incisal edges of the incisor teeth. Adjust the tube to an average angulation of -15º. Direct the central ray straight through the interproximal spaces at the center of the film and perpendicular to the bisecting plane (see figure 4-17). Follow the manufacturer’s instructions for exposure times.