NEET MDS Shorts
26815
RadiologySharpness of the image on the film can be increased by using a small focal spot.
26947
Pharmacology
Ipratropium (as ipratropium bromide, trade name Atrovent) is an anticholinergic drug administered by inhalation for the treatment of obstructive lung diseases. It acts by blocking muscarinic receptors in the lung, inhibiting bronchoconstriction and mucus secretion. It is a non-selective muscarinic antagonist, and does not diffuse into the blood, which prevents systemic side effects.
Ipratropium is a derivative of atropine[1] but is a quaternary amine and therefore does not cross the blood-brain barrier
86333
PedodonticsOcclusal correction is done after periodontal therapy primarily in cases of trauma from occlusion.
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NEETMDS
COGS (Center of Resistance and Center of Mass) analysis was given by Burstone and Nanda. This analysis is a method used in orthodontics to determine the biomechanical properties of teeth and dental arches for treatment planning.
57787
EndodonticsMost failures of replanted teeth are due to external resorption. This includes both inflammatory and replacement resorption: 1) Inflammatory resorption occurs due to infected necrotic pulp and damaged periodontal ligament, 2) Replacement resorption (ankylosis) occurs when periodontal ligament is severely damaged, 3) External resorption is progressive and often leads to tooth loss, 4) It is more common than internal resorption in replanted teeth, 5) Prevention involves proper handling, appropriate storage media, and prompt endodontic treatment when indicated.
76587
EndodonticsZinc oxide eugenol (ZOE) is the preferred filling material for primary root canals due to its excellent biocompatibility, antimicrobial properties, and ability to resorb along with the primary tooth roots. Unlike gutta-percha used in permanent teeth, ZOE provides appropriate sealing while allowing physiological root resorption.
68814
PhysiologyThe conversion of 7-dehydrocholesterol to cholecalciferol (vitamin D3) in the skin is initiated by the action of UVB light from sunlight, not by any specific hormone.
79389
General Medicine
The combination of fever, sore throat, and a fine, macular rash that is more prominent on the palms and soles is characteristic of scarlet fever.
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Oral Medicine
The mitral valve is crucial in preventing the backflow of blood from the left atrium to the left ventricle during systole, ensuring that blood flows in the correct direction through the heart during the cardiac cycle.
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INI CET
The Nasion (the intersection of the frontal and nasal bones) is generally considered a highly stable and accurately identifiable landmark compared to points like Porion (often obscured) or Point A (variable with tooth position).