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Periapical (PA) Pathology

Terms in this set (30)

most common radiographic lesion?
pulp inflammation leading to pulp necrosis
95% + Periapical lesions are the result of
Pulp inflammation leading to necrosis
T or F:
pulp inflammation leading to necrosis: tooth is vital
false: no response to stimulation
what are the early and late signs of radiographic features of Pulp inflamm leading to necrosis.
E: widening of PDL near apex
L:circumsised, symmetric, lucent defect in bone near root apex.
Name the 4 Differential diagnosis of pulp inflammation leading to necrosis.
1. PA granuloma
2. acute pericapical cyst
3. PA abscess
4. PA scar.
most common PA pathosis?
PA granuloma
Origin of PA granuloma?
inflammation leads to accumulation of granulation tissue near apex in response to products of pulp necrosis.
PA granuloma may transition from which two PA pathosis?
PA Cyst and PA abscess
another name from PA granuloma?
Chronic apical periodontitis
PA granuloma is symptomatic: T or F:
F: not sensitve to percussion
describe PA granuloma radiograph.
varibable in size, punched out border, symmetrical, loss of lamina dura at root tip.
How do you treat PA granuloma?
surgical/endo or extraction.
describe radiograph of Apical periodontal cyst (radicular cyst)
variable in size, symmetrical, punched out border, loss of lamina dura at root tip.
A small rule that could help you tell the diff btw a PA granuloma vs apical periodontontal cyst?
If larger than a nickel--> cyst
corticated border around it--> cyst
what are the variations in radiographic presentation of apical periodontal cyst?
a. classic pattern-->lesion surround root tip.
b. lateral apical periodontal cyst: found on side of root (associated with lateral accessory canal)
c. residual apical periodontal cyst: cyst remains following an extraction.
treatment for apical periodontal cyst?
endo-->surgery-->extraction.
origin of apical periodontal cyst?
due to inflammatory stimulation of epithelial remnants of HERS: (rests of malassez)
lateral placed apical periodontal cyst: is found in what level of the root
apical 1/3rd
sinus tract (fistula) origin?
1. pus goes through path of least resistance
2. destroys bone in its path
3. finds a path of exit.
sinus tract exits into these two locations?
oral cavity or skin
colors of gum boil
yellow, white, purple, red.
how does osteomyelitis occur?
occurs when PA spread into bone.
what is cellulitis?
skin infection caused by bacteria
2 types of cellulitis are?
ludwig angina and cavernous sinus thrombosis
ludwig angina results from
abscess of mandibular molar tooth.
Cellulitis: cavernous sinus thrombosis results from
Maxillary anterior PM tooth.
T or F: sublingual elevation of tongue and may extend into airway is a common characteristic of cavernous sinus thrombosis.
F: its Ludwig angina
what is the most common metastatic disease in women ? men?
breast(women) lungs(men)
malignancy at distant site far from jaws can spread through ___________ to the bone. This stimulates ___________ that may devitalize tooth.
bloodstream; inflammatory lesions.
T or F:
Radiograph of metastatic disease often presents with PA radiolucency
True! (moth eaten) border looks like a PA abscess.
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