NEET MDS Shorts
63079
Oral PathologyCentral giant cell granuloma characteristically presents as a single lesion in a single bone, typically the mandible or maxilla. In contrast, osteopetrosis affects multiple bones (generalized marble bone disease), Pagets disease commonly affects multiple bones (though it can be monostotic), and polyostotic fibrous dysplasia by definition affects multiple bones. CGCG is a localized reactive lesion.
19023
BiochemistryThe eye change include an increase in blood vessels and inflammation of the conjunctivae, cornea is invaded by capillaries, producing opaque areas and even ulceration. Dermatitis characterized by a greasy and scaly reddened lesion develops on the skin around the nasolabial folds and may extend to a butterfly shape on the cheeks. There many also be lesions at the corners (canthi) of the eyes and lobes of the mouth.
45383
RadiologyNasal septum is best viewed by occipitomental (Waters) view. This projection provides excellent visualization of the nasal septum without superimposition, allowing assessment of septal deviation, fractures, or other abnormalities of the nasal septum.
77659
MicrobiologyIn concentrations usually applied for sterilization purposes, ethylene oxide is preferable to formaldehyde becuase it is more penetrating
14472
General PathologyHemochromatosis is a condition characterized by excessive iron accumulation in the body, which can lead to a false positive on metal detectors due to high iron levels in tissues.
62707
Oral Pathology
Myxoma is the most aggressive tumor among the options listed. It is a rare,
benign, but locally aggressive neoplasm that can occur in various anatomic
locations, particularly in the heart and skin. Myxomas are known for their
ability to invade surrounding tissue and cause significant damage to the organ
in which they are found.
Here is a brief description of each tumor type:
1) Myxoma: As mentioned earlier, these are rare but locally
aggressive tumors that can invade and destroy surrounding tissues. They are
typically soft and gelatinous in consistency. When myxomas occur in the heart,
they can obstruct blood flow and cause severe complications.
2) Cementoblastoma: This is a rare, benign tumor that arises
from the periodontal ligament cells that are responsible for producing cementum,
which is the bone-like tissue that anchors teeth in the jaw. Cementoblastomas
are generally slow-growing and less aggressive compared to myxomas.
3) Ameloblastic fibroma: This is a benign, non-invasive tumor
that occurs in the jaw, typically in younger patients. It is composed of both
odontogenic epithelial cells and mesenchymal cells, which are involved in tooth
development. These tumors can cause expansion of the bone but are not as
aggressive as myxomas.
4) Ameloblastic fibro-odontoma: This is a mixed odontogenic
tumor, which means it is composed of both dental epithelial and mesenchymal
cells. It is usually benign and presents as a slowly growing, painless swelling
in the jaw. While it can cause bone expansion, it is less aggressive and
typically does not invade surrounding tissues like a myxoma.
89928
EndodonticsIn vital teeth, root canal filling should be 0.5-1mm short of the radiographic apex to avoid overfilling into periapical tissues. This corresponds to the apical constriction (cementodentinal junction), the ideal termination point.
27997
Oral PathologyOpen-ended lead-lined cones reduce the intensity of scattered radiation.
45869
PedodonticsA crater is a common osseous lesion in periodontitis.
72098
PeriodonticsThe mental nerve is situated beneath the mandibular arch and is at risk during flap procedures, especially when flaps are elevated or repositioned in that area.