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This technique produces radiograph with minimum distortion, showing objects that
are being x-rayed in their true anatomic relation and size.
Bisector Technique or Short Cone
In this technique, the digital sensor is placed in a way that the beam of the central X-
Ray must fall upon in a perpendicular way over an imaginary plan of the bisector of the
angle formed between the long axis of the tooth and the sensor capture surface,
according to the isometric law from Cieszinski. For this, the focal point of the X-Ray
generator must be placed at a distance of approximately 20cm of the sensor.
This technique produces radiographs with distortion, regardless of the technique
and precision of the operated. However, it also provides a relatively simple, fast and
comfortable positioning to the patient.
b) Metric calibration procedure
To perform the metric calibration, first perform the capture of an image of an object
that can be physically measured, using the radiographic technique that will be used with
the sensor.
