A parietoacanthial sinus projection (Waters method) with accurate positioning demonstrates
1. an equal distance from the lateral orbital margin to the lateral cranial cortex on both sides.
2. the bony nasal septum in alignment with the long axis of the exposure field.
3. the petrous ridges demonstrated inferior to the maxillary sinuses.
4. the ethmoid sinus through the mouth cavity in an open-mouth position.
a. 1 and 2 only
b. 3 and 4 only
c. 1, 2, and 3 only
d. 1, 2, 3, and 4
C
You might also like to view...
________ A person with Alzheimer's disease forgets part of an experience
Indicate whether the statement is true or false
Progressive muscle weakness, often accompanied by hearing loss, diabetes mellitus, heart problems, nervous system disorders, and other biochemical abnormalities are signs and symptoms of which disease?
A) Mitochondrial myopathy B) Fibromyalgia syndrome C) Myasthenia gravis D) Duchenne muscular dystrophy
Which of these statements regarding the radiographic appearance of dental materials is FALSE?
a. A full metal crown may be distinguished from amalgam by its smooth margins. b. A stainless steel crown has a see-through appearance. c. A porcelain jacket appears more radiopaque than a full metal crown. d. Porcelain appears about the same density as dentin.
________ is the surgical removal of the testes
a. Orchidopexy b. Orchiectomy c. Prostatectomy d. Epididymectomy