A Large Radiopacity Is Seen on the Middle of the Panoramic

question 15

Multiple Choice

A large radiopacity is seen on the middle of the panoramic film. Identify the cause of this appearance:

• A)patient was slouched in the unit
• B)patient's lead apron was placed too high
• C)patient moved during the exposure
• D)patient's chin was tilted up too far

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Definitions:

Articular Cartilage

Hyaline cartilage covering the ends of bones within a synovial joint.

Lubricating Film

A thin layer of liquid or semi-liquid substance applied to surfaces to reduce friction and wear.

Double Layer

A double layer often refers to structures composed of two levels of material, which in biological contexts, could imply the phospholipid bilayer of cell membranes or protective coatings.

Joint Surface

The part of a bone that articulates with another bone, usually covered with cartilage to enable smooth movements.