Please Note: For clarity, sensor is shown without a barrier. In this technique, the face of the cone a is positioned so it is at the bisected angle b of the long axis of the tooth c and the face of the sensor d. In these cases, the clinician may adopt the bisecting angle technique Fig. Paralleling is always the preferred technique to use when taking radiographs. Whether taking vertical or horizontal bitewing radiographs Fig. With the sensor placed at the midline, as the patient closes, there is greater comfort than if the sensor were next to the teeth. It is perpendicular to the interdental spaces so the contacts of the premolars are open, instead of overlapped, on the image. In the case of the lower premolar exposure Fig. The same technique is used for posterior exposures. The patient then closes on the biteblock and the X-ray is taken. The sensor is then gently guided toward the midline where typically there is more room. Picture a line going through the contact.

The face of the sensor is positioned perpendicular to the interdental space between the canine and the lateral. Once the sensor is placed into the appropriate holder, follow the paralleling steps above.įor example, on an exposure for the maxillary canine Fig. The principle behind this technique is to place the sensor a parallel to the long axis of the teeth to avoid foreshortening or elongation b perpendicular to the inter-dental spaces to avoid overlapping and c in the deeper areas of the mouth, at the midline, to allow for true parallelism and greater patient comfort. To help achieve this goal, sensor manufacturers have had to balance the size and shape of the sensor to allow for greater positioning ease.

Dexis titanium holder