Intraoral Radiography Techniques part 2

Question 1

Occlusals - when are they done?

Answer 1

• Pathology not fully covered by periapical
• Assess impacted teeth such as maxillary canines
• Used in localisation in conjunction with other films (parallax principle)
• Trauma
• Bony expansion of mandible
• Submandibular duct stones

Question 2

Collimator?

Answer 2

Device for changing the diverging light or other radiation from a point source into a parallel beam

Question 3

Technique

Answer 3

Uses a larger film size 4
Use circular collimator for larger SA of x ray beam
Film held between the teeth, parallel to occlusal plane
– Raised dot/sensitive surface of the receptor towards the arch being imaged i.e. up for maxillary teeth.

Question 4

True Occlusal radiograph

Answer 4

X-ray beam perpendicular to film from all directions

Question 5

Oblique occlusal radiograph

Answer 5

• X-ray beam angled other than right angles to film from at least one direction

Question 6

Maxillary oblique occlusal: midline- other terms for this?

Answer 6

Upper standard occlusal, anterior oblique (AO) or maxillary midline