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Chapter 21

Occlusal and Localization Techniques

QuestionAnswer
Purpose of occlusal films locate retained roots supernumerary, unerupted or impacted foreign bodies salivary stones fractures cleft palate changes in max or mand size cysts and tumors examine teeth when pt cannot open wide
What size film is used? size 4
Where is the film /receptor placed between occlusal surfaces
When is the film/receptor stabilized? when patient bites down
The central ray is directed how many degrees to the plane of the film for a maxillary topographic occlusal projection? +65
The central ray is directed how many degrees to the plane of the film for a mandibular topographic occlusal -55
Mandibular cross section, the central ray is ____________ to the plane of the film perpendicular or 90 degrees
What is the SLOB rule SAME lingual, OPPOSITE buccal
When is the SLOB rule used? to identify the buccal or lingual location of objects in the relation to the reference object
What is the buccal object rule a method used to determine the relative position of two objects in the oral cavity using projectional dental radiography.
When an object moves in the same direction as the PID shift, the object is said to be in the _______ position lingual
When an object moves in opposite direction of the PID shift , object is said to be in the ________ position buccal
Why do you need film duplication copies for specialists if patient moves away
Duplication film has emulsion on how many sides one
Technique for duplicating films place radiographs on light screen of duplicator place duplicating film on top of radiographs with emulsion side (dull) down maintain good contact select exposure time and activate light source process film
Why do you need to maintain good contact between films during duplicating prevent blurring
Created by: kbowman12
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