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Intraoral Radiography Techniques

Presenter: Zahrah Almubarak

Dental Assistant Specialist

Radiographic Image

An image taken of the teeth used for diagnostic purposes.

Radiographic Image

Periapical Image

Are intended to evaluate the teeth, roots, periapical region of the tooth and bone level of a patient mouth.

1. Periapical

Criteria of Quality of Periodical Images

Criteria of Quality of Periodical Images

1. Radiographs should record the complete areas of interest on the image.

2. It is essential to obtain the full length of the tooth and at least 2mm of periapical bone.

Periapical Imaging Techniques

Techniques

There are five basic rules must be followed when take x-ray:

Receptor placement.

Receptor position.

Technique Rules

Vertical angulation.

Horizontal angulation.

Central ray.

Paralleling Technique

Paralleling Technique

It is the most accurate intraoral radiographic with a least amount of radiation exposure to the patient.

Receptor Placement

in Paralleling Technique

The receptor (digital sensor or film) must be cover the correct teeth.

Receptor Position

in Paralleling Technique

The receptor must be positioned parallel to the long axis of the tooth and away from the teeth.

Vertical Angulation

in Paralleling Technique

The central ray of the x-ray beam must be directed perpendicular to the image receptor and the long axis of the tooth.

Horizontal Angulation

in Paralleling Technique

The central ray of the x-ray beam must be directed through the contact areas between the teeth.

When the horizontal angulation is correct, the central x-ray beam will be directed through the contact areas, otherwise, overlap will occur.

Central Ray

in Paralleling Technique

The x-ray beam must be centered on the receptor to ensure that all areas exposed.

Central Ray Entry Points

Maxillary Periapicals

Mandibular Molar Periapicals

Parallel Technique

Bisecting Angle Technique

Bisecting Angle Technique

Primary beam is directed perpendicular to an imaginary line that bisects the angle between image receptor and tooth.

Receptor Placement

in Bisecting Technique

Similar to paralleling technique, the receptor must be cover the correct teeth.

Placing the receptor directly against the tooth as possible.

Receptor Position

in Bisecting Technique

You may see operators asking the patient to hold the film with his finger to stabilize the film in the mouth.

Holding the film/sensor exposes the patient’s hand and finger to unnecessary radiation.

Vertical Angulation

in Bisecting Technique

The central ray of the x-ray beam must be directed perpendicular to the imaginary line that divides the angle formed by the long axis of the tooth and the receptor.

Recommended Vertical Angulation Ranges For Bisecting Technique

Horizontal Angulation

in Bisecting Technique

Same as paralleling technique the central ray of the x-ray beam must be directed through the contact areas between the teeth.

When the horizontal angulation is correct, the central x-ray beam will be directed through the contact areas, otherwise, overlap will occur.

Central Ray

in Bisecting Technique

The x-ray beam must be centered on the receptor to ensure that all areas exposed.

Bisecting Angle Periapical Technique

Object Localization Technique

(SLOB technique)

Object Localization Technique

Also know as:

  • Tube-shifting technique.
  • SLOB technique.

Same Lingual, Opposite Buccal.

Object Localization Technique

Used to identify the buccal or lingual location of objects ( Impacted teeth, root canals, etc.) In relation to a reference object usually a tooth.

Object Localization Rule

Same Lingual, Opposite Buccal.

If the image of an object moves mesially when the tube head is moved mesially ( same direction), the object is located on the lingual.

If the image of an object moves distally when the tube head is moved medially( opposite direction), the object is locate on the buccal.

The SLOB Rule Explained

Website

2.

Bite-wing

Visits by Source

Traffic

Sources

Visits - Customer

Visit to Customer

Performance

3.

Occlusal

Email

Click to edit text

Total Emails Sent:

10 million

Total Emails Delivered:

9.9 million

Total Emails Opened:

3 million

Open Rate:

30%

Total Clicks:

100,000

Click-Through Rate:

3.2%

Total Unsubscribes:

10,000

Unsubscribe Rate:

0.3%

Bitewing Technique

Bitewing views are used to detect interproximal caries and are particularly useful in detecting early carious lesions that are not clinically evident and examining crestal bone levels between the teeth.

Bitwing Imaging Techniques

Basic Principles of the Bitewing Technique

There are five basic rules must be followed when take Bite-Wing x-ray:

  • The image receptor is placed in the mouth parallel to the crowns of both the upper and lower teeth.

  • The image receptor is stabilized when the patient bites on the bitewing tab or the bitewing film holder.
  • The central ray of the x-ray beam is directed perpendicular to the image receptor.

  • The vertical angulation the central ray is directed at +10 degrees to the occlusal plane.

  • The horizontal angulation the X-ray tubehead is aimed so that the beam meets the teeth and the image receptor at right angles, and passes directly through all the contact areas.

Bite-wings

  • The premolar bitewing image should include the distal half of the crowns of the canines, both premolars, and often the first molars on both maxillary and mandibular arches.

  • The molar view should be centered over the second molars.

Bite-Wing Technique

Leads

Periapical Imaging Techniques

Lead Sources

Lead

Sources

Lead

Comparison

Lead

Comparison

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