Interpretation Flashcards
Some conditions tend to
occur around crown of
impacted teeth
• Dentigerous cyst
• Cystic Ameloblastoma
• Some conditions in missing tooth area :
• Residual cyst
– Some conditions around apices on teeth:
Grauloma ,abscess, cyst.
Internal structure
• Associated with
Impacted tooth
Some conditions tend to occur in a single anatomic site:
• Globulomaxillary cyst
• Incisive canal cyst
Naso alveolar cyst
Median mandibular cyst
Some conditions tend to occur Bilaterally:
• Cherubism
• Odontogenic keratocyst
Metabolic, systemic or endocrine are
Generalized
BELOW inferior dental canal
suggests a Non- Odontogenic,
e.g .,Median mand .,Cyst
Aneurysmal bone cyst
WITHIN inferior dental canal
May be vascular or neurogenic in origin or may be the site of initial lesion in Metastatic disease.
Above inferior dental canal
a Odontgenic, e.g.,Residual cyst, Dentigerous, Lateral period.cyst
SIZE
• Consider the size of the lesion.
• The size may aid in the differential diagnosis .
• e.g.
Dentigerous cyst
SHAPE
The lesion may have a particular shape ,or it may be irregular.
Circular,or scalloped . Expansile e.g
Benign (C.G.Granuloma).
Well defined margins: means
Slowly growing lesions
• Ill defined margins:
• Rapidly growing lesions :an invasive border is associated with rapid growth .e.g. malignant lesions.
a blending margin eg
a blending margin is ill defined between normal and abnormal .e.g. Fibrous dysplasia.
Punched out with no sclerosis . ( sharp boundary in which no bone reaction adjacent to the abnormality e.g.
Multiple Myeloma
Thin condensed sclerotic rim. e.g
late stage of Myxoma.
Thick condensed sclerotic rim ( RO line of reactive bone at the periphery e.g.
Cyst
Thick diffuse sclerotic rim e.g.
Cementoma
Totally R.L e.g.
Cyst
Totally R.O e.g.
Salivary gland stones
Mixed RL &RO e.g.
Osteomylities
A radio opaque lesion may have a soft tissue capsule ,which eg
A radio opaque lesion may have a soft tissue capsule ,which indicated by the presence of a radiolucent line at the periphery.
e.g. Odontomas.
• RL
• ROn%
• Mixed
• RL 90%
• RO 2%
• Mixed 8%
Honey comb
• Soap bubble seen in
early Stage
• Late stage AB
Aneurysmal bone cyst
Ameloblastoma
Tennis racket seen in
Odontogenic myxoma
Scalloped seen in
Odontogenic keratocyst
Central giant cell granuloma
• Hair on end
Rarely seen in the jaws
• E.g. Sickle cell anemia or • Thalasthemia
Ground glass
Fibrous dysplasia
Cotton -wool
Pagets disease
Displacement :suggest chronicity e.g.
Large Cyst
Resorption: suggest
Resorption: suggest slowly growing lesions
• E.g. chronic infection
Garrers osteomyeltitis
Sclerosing osteomyelitis
Root inclusion :the lesion go around
the roots e.g.
Root inclusion :the lesion go around
the roots e.g. sq.cell.carcinoma.
• It is affecting on lamina dura causing its thinning or thickening or its absence.
Multiple myeloma
Time of lesion if present! importance
provide a clue about the nature of the lesion because slow-growing lesions tend to be benign, while fast- growing aggressive lesions are usually malignant.
This systematic description of lesions
forms the
This systematic description of lesions
forms the step
diagnosis
