1/9/17 Flashcards
2 most important aspects necessary for dx:
cx hx, HNE
How to describe localization of abnormality:
localized/ generalized, position in jaw, single or multiofocal, size
one of the most common to see in cliniic, man or max, any quadrant, any part of jaw, generalized
Florid cemento-osseous dysplasia
bone or periosteum, typically better px?
periphery, not as aggressive
Origin of lesion above inferior alveolar nerve canal:
odontogenic
Origin of lesion below inferior alveolar nerve canal (IANC):
unlikely odontogenic
Central axis;
central, eccentric, within cortex, periosteal, parosteal
one of the most common lesions we will see
below canal:
staphne defect, lingual man salivary depression
Most lesions above the IANC besides PA lesions:
dentigerous cyts
Nodule protruding from man in occlusal rg:
peripheral osteoma
Give an example of a peripheral lesion:
peripheral osteoma
Give an example of a centrall lesion:
compound odontoma
To describe the circular ring around dentigerous cyst:
pericoronal
1st thing to do if there is a PA RL:
pulp test
Most common cyst in oral cavity:
Periapical cyst
Multiple periapical RGL, suspect this:
periapical cemento-osseous dysplasia
periapical cemento-osseous dysplasia:
multiple teeth affected, common, especially in A-A females, RGL in periapical area - do pulp test, tooth is vital in PCOP, don’t treat, just follow patient
Mesure cysts in mm or cm?
cm
2nd most common odontogenic tumor in oral cavity, above canal, large
ameloblastoma
Staphne defect affects this gland:
lingual mandibular salivary gland
To dx staphne defect:
well defined, unilocular, RGL below the IANC in the posterior mandible
Well defined borders, most likley benign or malignant?
benign
Characteristics of benign lesions;
well define borders, smooth, regular, corticated
Characteristics of malignant lesions;
ill-defined borders, ragged, moth-eaten, poorly marginated
TF? No aggressive lesions have well defined borders.
F
Ameloblastoma, benign or malignant?>
benign
2 things to always included in Ddx w ill defined borders:
osteomyelitis (especially w ClHx), malignant lesion
Well defined borders are a sign of;
slow growing, benign process
Can ill defined borders be seen in osetomyelitus?
yes, and can have the appearance of being malignant
**heart shaped RGL bw CI roots:
always associated with nasopalatine duct cyst (check)
Type of multilocular lesions:
soap-buble, honeycomb, tennis racket, step ladder
Radiopacity indicates inc:
mineralization
lesion with homogenous appearance:
condensing osteitis
lesion with ground glass appearance:
Fibrous dysplsia
lesion with cotton wool appearance:
Pagets disease
lesion with calcific spherules/masses appearance:
compound odontoma
lesion with radiolucent rim appearance:
cementoblastoma
lesion with sunburst or sun ray appearance:
osteosarcoma
expansion, sclerotic borders, possible erosion of cortical bone if aggressive are assoc w:
benign lesions
Cortical bone erosion and destruction are assoc w:
malignant lesions
Lesions that present as punched out borders:
Langerhans cells histiocytosis, multiple myeloma
Langerhans cells histiocytosis, multiple myeloma:
sharply define, punched out border, sharp transiiont bw lesion and bone, lack of sclerotic rim
Effect of benign lesion (amelolabstoma) on the inferior alveolar nerve:
displacement mandibular canal, no neuro-sensory deficits
Effect of mal lesion (SCCa) on the inferior alveolar nerve:
invasion and destruction of canal, anesthesia, parathesia
Path that can lead to “floating teeth”
Langerhans cells histiocytosis
Pattern of tooth displacement w benign lesions:
separation of apex of roots
How to differentiate bw dentigerous cysts\ and ameloblastoma:
ameloblastoma is below the IANC
Complex odontoma;
RGO, well defined
Bengn lesion effect on roots:
horizontal, scallping (check)
Malignant lesion on tooth root
more variable, spiked root
Localized oot destruction is usually assoc w:
pressure resortption from slowly growing lesions or benign neoplasms such as ameloblatsom
How to tell the difference bw PA cyst and PA granuloma vai RG:
impossible
