The film dot is a raised area in one corner of the film. It is used to determine right from left on the processed film. When taking the radiograph, the dot is placed toward the occlusal (biting) surface and toward the tube head.


Dot location on cassette


Raised dot on unprocessed film


Film cassette with circled film dot toward occlusal surface of incisors


Film dot circled on cassette positioned toward right maxillary premolars

Film correctly positioned to expose left maxillary premolars.

Table of Contents
Smile Book II
Dental Radiology
Jan Bellows, D.V.M. Diplomate, American Veterinary Dental College
About the Author
Section 1: Getting Started - The Tools
The Radiograph Machine
The Film
The Film Dot
Film Processing
Trouble Shooting Dental Film
Section 2: Getting Started - What to Look For
Section 3: Identifying Possible Problems
Section 4: Aids for Explaining Radiology to Clients

Check out the entire
Smile Book Series


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Jan Bellows, DVM
All Pets Dental Clinic
17100 Arvida Parkway
Weston, FL 33326
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