NEET MDS Shorts
75515
Physiology
Answer: 4) Increase in heart rate and increase in stroke volume
Explanation: Thyroid hormones, such as thyroxine (T4) and triiodothyronine (T3), enhance the effects of catecholamines on the cardiovascular system, leading to increased heart rate and stroke volume. This results in a higher cardiac output, which is essential for meeting the increased metabolic demands during stress or exercise.
51957
ProsthodonticsNon-rigid or semi-rigid connectors are used in dental bridges when there is a need to accommodate non-parallel abutments (option 2). This design allows for some movement between the components of the bridge, which can help in achieving a better fit and function when the abutments are not parallel.
25787
Dental Materials
Heat-activated resins typically have a higher degree of polymerization, resulting in less residual monomer and greater strength compared to chemically activated resins.
73424
ProsthodonticsTo make an impression of hyperplastic tissue, one should ensure intimate contact of the impression material with the tissue.
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Endodontics
Endodontic instruments, particularly those used for root canal treatment and
implants, typically have a length of around 40 mm. This length allows for
adequate reach into the root canals of most teeth, which can vary in depth.
Instruments shorter than this may not effectively reach the apical areas of the
root canals.
35333
PedodonticsGingival clefts are caused by trauma from occlusion.
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.
44741
NEETMDS
Aggressive periodontitis is
characterized by a rapid destruction of periodontal tissues and bone
loss, which is often associated with specific bacterial pathogens,
particularly Aggregatibacter actinomycetemcomitans. However,
the primary etiological factor is a reduced or altered immune
response of the host, which makes individuals more susceptible to
these bacteria and the resulting tissue destruction. Plaque
accumulation is a factor in all periodontitis but not the primary
distinguishing factor for the aggressive form.
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INI CET
The lesser wing of sphenoid is considered part of horizontal trajectories rather than vertical trajectories.
89793
Oral PathologyBadges should be worn by dental technicians every 3 months to monitor radiation exposure.