Video Note: How to take dental x-rays with bisecting angle positioning Flashcards
What is the bisecting angle technique used for?
The bisecting angle technique is used to obtain the correct length of the tooth image on the X-ray film.
What instruments do many offices use to assist with the bisecting angle?
Many offices use ring instruments, which help eliminate elongation, foreshortening, and overlapping.
What happens if the vertical tube angle is incorrect?
An incorrect vertical tube angle can cause errors of elongation or foreshortening in the image.
How is the bisecting line determined?
The bisecting line is determined by the placement of the film in the mouth and the long axis of the tooth.
What should the X-ray beam do in relation to the bisected line?
The X-ray beam should cross the bisected line at a perpendicular or right angle.
What is the effect of raising the vertical tube angle too high?
Raising the vertical tube angle too high can project the root tip too low on the film, resulting in a short image.
What should you do if the sensor is bulky and distorts the image?
Tip the sensor slightly to help the patient reach the bite block easily and avoid distortion.
How should the bite wing film be positioned?
The bite wing film should be placed to include the premolar and positioned far enough forward in the mouth.
What is important to ensure when using the horizontal beam?
Ensure the X-ray beam hits the buccal surface of the premolars at a right angle.
What common mistake do people make when positioning the X-ray cone?
A common mistake is guessing the direction of the horizontal beam, which can cause overlapping of crowns.
What should you understand about vertical and horizontal angles?
Understanding that vertical tube angle affects elongation and horizontal angulation affects overlapping is crucial.
Where can you find more information or ask questions?
Visit us at dentalxrays.com and click on ‘Ask the Experts’.
