NEET MDS Shorts
53911
Radiology
Hyperparathyroidism is a condition characterized by an
overproduction of parathyroid hormone (PTH), which leads to increased bone
resorption and changes in bone density. The radiographic features associated
with hyperparathyroidism include: Loss of Lamina Dura: The lamina dura is the thin layer
of dense bone that lines the tooth socket (alveolus). In
hyperparathyroidism, the loss of lamina dura can be observed due to the
increased osteoclastic activity and bone resorption. Ground Glass Appearance: This refers to a radiographic
appearance of bone that looks hazy or "ground glass" rather than having a
clear, well-defined structure. This appearance is due to the alteration in
bone density and the presence of fibrous tissue replacing normal bone. Osteogenesis Imperfecta: This condition is characterized
by brittle bones due to a defect in collagen formation. Radiographically, it
may show thin cortices and osteopenia, but not typically a ground glass
appearance. Osteopetrosis: This is a condition of excessive bone
density due to impaired osteoclast function. Radiographically, it shows
increased radiopacity (dense bones) rather than a ground glass appearance. Osteitis Deformans (Paget's Disease): This condition is
characterized by disorganized bone remodeling. Radiographically, it can show
a "cotton wool" appearance and enlarged bones, but it does not typically
present with a loss of lamina dura or a ground glass appearance in the early
stages.
Other Options:
55873
Dental MaterialsFerrite and austenite are soft and ductile
93128
General Medicine
The description of a painless, red, scaly rash that spares the face, palms, and soles and involves the trunk and limbs is characteristic of psoriasis. The lesions are typically well-demarcated and have a "salt-and-pepper" appearance due to the presence of scales.
31264
EndodonticsRC-prep is a combination of EDTA with urea peroxide. This chelating and lubricating agent: 1) Contains 15% EDTA for chelation of calcium ions in dentin, 2) Contains 10% urea peroxide for effervescent action and debris removal, 3) Helps soften dentin and remove smear layer, 4) Provides lubrication during instrumentation, 5) Has antimicrobial properties. The combination provides both chemical (EDTA) and physical (effervescence) cleaning action, making instrumentation more efficient and effective in removing both organic and inorganic debris from root canals.
17110
INI CET
A tissue phase (hypnozoites in liver) is characteristic of P. vivax and P. ovale, leading to relapses.
[Image of the Malaria parasite life cycle]
37553
ProsthodonticsA lingual rest is preferred to an incisal rest because it is nearer to the center of rotation of the supporting teeth. This positioning provides better force distribution and reduces the tendency for lateral forces that could damage the periodontium. The closer proximity to the center of rotation minimizes harmful lever arms.
77168
INI CET
In orthodontics, pitch refers to rotation around the transverse (side-to-side) axis, leading to an upward or downward rotation of the jaws or occlusal plane, which alters the vertical dimension.
32016
Physiology
Answer: 3) The equilibrium potential for sodium (Na+) ions in a typical neuron is +60 mV.
12725
State PSC PYQ
Primary prevention aims to stop disease before it starts. Pit and fissure sealants protect tooth surfaces and prevent caries formation.
Serial extraction and scaling and root planning are examples of secondary or tertiary prevention, as they involve treatment after a condition (malocclusion or periodontal disease) has already started.
Fluoride use on incipient caries is also secondary prevention as it aims to halt the progression of an already existing early lesion.
75432
EndodonticsVertical condensation of warm gutta-percha is particularly useful when there are aberrations, irregularities, or accessory canals because the heated material can flow into these spaces better than cold lateral condensation techniques.