Chapter 7 Flashcards
What are the types of Intraoral Projections
- Periapical Radiography
- Paralleling Technique
- Bisecting Angle Technique
- Bitewing Radiography
- Occlusal Radiography
- Full-Mouth Radiographic Series
Shows the entire length of a tooth, from crown to apex.
Periapical Radiography
Used to assess: Caries (tooth decay)
Periapical Radiography
Used to assess: Periapical inflammation (infection at the root tip)
Periapical Radiography
Used to assess: Trauma (injuries to teeth and bone)
Periapical Radiography
Used to assess: Periodontal bone loss (gum disease)
Periapical Radiography
Receptor is positioned parallel to the tooth’s long axis.
Paralleling Technique
Central x-ray beam is perpendicular to both tooth and receptor.
Paralleling Technique
Minimizes distortion for a more accurate image.
Paralleling Technique
Used when paralleling is difficult due to anatomy.
Bisecting Angle Technique
Receptor is positioned as close to the lingual surface as possible.
Bisecting Angle Technique
Central x-ray beam is perpendicular to an imaginary line bisecting the angle between the tooth and receptor.
Bisecting Angle Technique
Focuses on the crowns of teeth and the adjacent alveolar crests.
Bitewing Radiography
Primarily used to detect: Interproximal caries (decay between teeth)
Bitewing Radiography
Primarily used to detect: Bone loss in the interdental areas
Bitewing Radiography
Produces a larger view of a dental arch, including the palate or floor of the mouth.
Occlusal Radiography
Useful for locating:
Unerupted teeth
Foreign bodies
Disease
Fractures
Occlusal Radiography
Consists of periapical and bitewing projections.
Full-Mouth Radiographic Series
Provides valuable diagnostic information.
Full-Mouth Radiographic Series
Radiographs should capture the entire area being examined.
Complete Areas of Interest
Periapical views should include the full length of the roots and surrounding bone.
Complete Areas of Interest
Radiographs should not capture the entire area being examined.
True or False
False (should)
Periapical views should include the half length of the roots and surrounding bone.
True or False
False (full length)
Distortion caused by improper beam angulation should be minimized.
Minimal Distortion
Ensures accurate interpretation of the images.
Minimal Distortion
Distortion caused by proper beam angulation should be minimized.
True or False
False (improper)
Radiographs should have appropriate density (blackness) and contrast (difference between light and dark areas).
Optimal Density and Contrast
Facilitates clear visualization of structures.
Optimal Density and Contrast
Periapical Radiography: What are the Diagnostic Objectives
- Caries (tooth decay)
- Periapical inflammation (infection at the tip of the root) o Trauma (injuries to teeth and bone)
- Periodontal bone loss (gum disease)
- Root morphology (shape and structure of the root)
- Implant osseointegration (bone growth around implants) o Unerupted and impacted teeth
- Root resorption (loss of tooth structure)
- Pulp morphology (shape and structure of the pulp)
- Determine endodontic instrumentation length
What are the 2 Radiographic Techniques
Paralleling Technique and Bisecting Technique
Right-angle, Long-cone
Paralleling Technique
Receptor parallel to tooth long axis
Paralleling Technique
Central ray perpendicular to tooth and receptor
Paralleling Technique
Minimizes distortion
Paralleling Technique
Requires receptor holder
Paralleling Technique
Receptor as close to lingual surface as possible
Bisecting Angle Technique
Central ray perpendicular to bisector of angle between tooth and receptor
Bisecting Angle Technique
May be useful when paralleling is difficult
Bisecting Angle Technique
Stabilize receptor to a bite block
Receptor-Holding Instruments (Paralleling Technique)
Ensure parallel orientation of receptor and tooth
Receptor-Holding Instruments (Paralleling Technique)
Parallel to teeth and deep into vestibule
Receptor Placement (Paralleling Technique)
Consider anatomic variations (shallow palate, tori)
Receptor Placement (Paralleling Technique)
Aiming cylinder aligned with aiming ring
Angulation of the Tube Head (Paralleling Technique)
Horizontal angulation influences crown overlap
Angulation of the Tube Head (Paralleling Technique)
