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Terms in this set (45)
Name the 4 paranasal sinuses
V shaped radiopacity on a radiograph is what?
Zygomatic process of the maxilla
What area is usually the zygomatic process of the maxilla usually at?
1st and 2nd molar
Y-line of Ennis marks which teeth?
-canine and premolar
What makes up the Y-line of Ennis?
Anterior border of maxillary sinus and floor of nasal cavity
Water's view is primarily used to see what? Secondary?
maxillary sinuses (primary)
frontal and ethmoid air cells (secondary
What is the degree of inclination in order to obtain a Water's view?
37 degrees to horizontal plane
Lateral skull view's primary view? secondary view?
-sphenoid sinus (primary)
-frontal sinuses, maxillary sinuses, ethmoid air cells (secondary)
Features of mucous retention pseudocyst (5)
-10-30% of patients
-asymptomatic, resolves spontaneously
-dome-shaped radiopaque mass
-homogenous & no corticated border
-no effect on surrounding structures
What has a homogenous, no corticated border, dome shaped radiopacity?
Mucous retention pseudocyst
Normal mucousal thickness?
What is the difference between sinusitis and mucositis?
Localized thickening = mucositis
Generalized thickening= sinusitis
Common place to have mucocele
Ethmoid and frontal sinuses
Rare place to have a mucocele
What is an expanding, destructive lesion resulting from a block sinus ostium?
Clinical features of polyps (4)
-hyperplasia of mucosal lining
-smooth, round, soft-tissue mass
-expansion and destruction of bony walls
-change shape with changes in head position
Difference between mucous retention cyst and a polyp?
Polyps cause destruction while mucous retention cysts don't
Most common reason for an antrolith
Difference between odontogenic tumor and mucous retention cyst
Odontogenic tumor = corticated border
mucous retention cyst = no corticated border
What is the rule of 80 for malignancies? (4)
80% in maxillary sinus
80% occur in patients over 40
80% are squamous cell carcinomas
80% cause bone destruction
What can be used to detect radiopaque calclulus?
Indications for sialography (3)
-detect chronic inflammatory or ductal diseases
-detect radiolucent calculus
-detect space occupying lesions
Contraindications for sialography (2)
-sensitivity to iodine
CT and MRI indications
-space occupying lesions
-acute inflammatory process and abscesses
Scintigraphy (nuclear medicine) indications (3)
-acute inflammatory process
Indications for ultrasonography (1)
-differential diagnosis of inflammatory diseases
Why is ultrasonography good?
Salivary calculus clinical findings (2)
-episodic pain and swelling related to eating
-can be opaque or non-opaque
Common salivary gland affected by salivary calculus
Submandibular gland and duct
What is sialadenitis?
inflammation of salivary GLANDS
Most common gland affected by sialadenitis
What is characterized by
-saccular dialation of acini
-ducts are normal
-residual contrast on clearing films
What is inflammation of the salivary DUCTS called?
Radiographic findings of sialodochitis? (5)
-sausage string appearance
-terminal ductiles reduced in number
-acini are NORMAL
-small amount of residual dye on clearing films
What is a ranula?
-obstructed sublingual gland
What is a plunging ranula?
ranula dissection below myohyoid muscle
What is an asymptomatic enlargement of parotid that is non-neoplastic and non-inflammatory
Sialosis or sialadenosis
Is sialosis/sialadenosis bilateral or unilateral and is it symmetrical or asymmetrical?
Bilateral and asymmetrical
What is the classic triad for Sjogren's syndrome?
What is characterized by the follow radiographic findings?
-gross, diffuse enlargement of salivary glands
-punctate sialectases, cherry-tree dilation
-residual contrast in acini only
Rule of 80s for salivary gland tumors
80% in parotid
80% are benign
Most common tumors of the salivary glands (2)
Pleomorphic adenomas and Warthin's tumors
An intrinsic tumor of the salivary gland gives off what appearance?
Ball in hand appearance in ENLARGED glands
An extrinsic tumor of the salivary gland gives off what appearance?
Cystic defect in normal sized glands
What fraction of salivary gland tumors are carcinomas?
THIS SET IS OFTEN IN FOLDERS WITH...
Dental & Maxillofacial Trauma
Multiple system diseases
Soft tissue calcification
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