What is long cone paralleling technique?
The long cone paralleling technique positions the receptor (i.e. film) parallel to the long axis of the teeth and guides the central ray of the x-ray beam to be directed at a right angle to the teeth and the receptor. This method produces images of the teeth on the receptor with minimal distortion.
What is parallel technique in dental radiography?
The paralleling technique is the most commonly used technique for exposing periapical and bitewing radiographs because it creates the most accurate representation of a tooth image. It refers to the receptor being positioned parallel to the full length (long axis) of the tooth being radiographed.
What are the three 3 main principles of the paralleling technique?
Terms in this set (11)
- the receptor is placed in the mouth parallel to the long axis of the tooth.
- the central ray of the x-ray beam is directed perpendicular to the receptor and the long axis of the tooth.
- a beam alignment device must be used to keep the receptor parallel with the long axis of the tooth.
Why is the paralleling technique preferred in dentistry?
The paralleling technique, when performed correctly, is superior to the bisecting angle technique because it produces an image with both linear and dimensional accuracy.
What is the basic principle of the paralleling technique?
The long-cone paralleling technique is based on the following principles: an increased distance between the radiation source and the film to obtain a bundle of parallel rays; an increased distance (except for the lower molar region) between the tooth and the film to obtain parallelism between the film and the long-axis …
When is paralleling technique used?
Intraoral radiography using the parallel technique is the recommended method for visualizing minute bone changes, despite the continual improvements of extra-oral radiographic systems. By using this technique, high accuracy in measurements can be obtained.
What is the advantage to paralleling technique?
Reducing the Risk of Errors Using the incorrect size of film or the incorrect orientation for the area being examined can result in incomplete coverage.
What is short cone technique?
A dental radiographic technique that requires placement of the film as close as possible to the teeth, causing the film to rest against the crown; visualization of a bisector, which bisects the angle formed by the long axis of the teeth and the film; and positioning of the central ray perpendicular to the bisector.
Why is the bisected angle technique used in dental radiography?
Introduction. This technique is used in areas where the parallel technique is impossible due to poor access, making the angle between tooth and film more than 15 degrees. Using this technique, a true image of the tooth length and width is obtained.
What is the long cone paralleling technique?
The Long Cone Paralleling Technique The long cone paralleling technique positions the receptor (i.e. film) parallel to the long axis of the teeth and guides the central ray of the x-ray beam to be directed at a right angle to the teeth and the receptor. This method produces images of the teeth on the receptor with minimal distortion.
What is paralleling technique for periapical Xray?
The paralleling technique results in good quality x-rays with a minimum of distortion and is the most reliable technique for taking periapical x-rays. The film is placed parallel to the long axis of the tooth in question and the central x-ray beam should be directed perpendicular to the long axis of the tooth.
How are Intraoral periapical radiographs produced?
Intraoral periapical radiographs can be produced using two different techniques; the bisecting-the-angle technique and the more commonly used long cone paralleling technique.
How is a dental X-ray performed?
With this technique, the film is placed parallel to the long axis of a tooth, allowing the X-ray to be focused perpendicular to the long axis of the tooth. The patient is seated upright in the dental chair and should remove any removable dental appliances, glasses or jewelry that could interfere with the X-ray beam.