Fig.1: Regular posterior periapical (PA) device has a horizontal bite block (B). In contrast, the bite block of an endo X-ray device is vertical and narrow mesiodistally (Fig.4: B, as compared to Fig.1).  A pilot drill can be placed close to the center of the sensor.  Return to original article

Xin Wei, DDS, PhD, MS 1st edition 12/09/2012, last revision 12/09/2012