The disadvantage of using the largest size image receptor possible to expose a bitewing radiograph is that:
a. unnecessary structures will be imaged.
b. exposure times must be increased.
c. anatomical limitations may hinder ideal placement.
d. it is contraindicated for patients with periodontal disease.
c. The number and size of image receptors to use depends on the type of survey required and the size and shape of the patient's oral cavity. Additional factors to be considered when deciding how many and what size image receptor to select is the length and curvature of the arches, which vary in all individuals.
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A steel web used in conjunction with rigid connections in beam and girder frames and heavy trusses is a:
A) simple mesh. B) gusset plate. C) web plate. D) pivot web.
Answer the following statement(s) true (T) or false (F)
1. Water is a molecule. 2. Anabolism and catabolism are both part of the body's metabolism. 3. Catabolism is the process of building small molecules into large ones. 4. Acids release hydroxyl ions in water. 5. A solution with a pH of 7.4 is alkaline.