NEET MDS Shorts
74949
Oral PathologyThe clinical presentation of bleeding gums, joint swelling with hemarthrosis (bleeding into joints), and the X-linked inheritance pattern (affecting males, transmitted through carrier females as indicated by both paternal and maternal uncles being affected) is characteristic of Hemophilia A, which is caused by Factor VIII deficiency. This is the most common severe inherited bleeding disorder.
11622
Oral SurgeryFormalin, specifically 10% neutral buffered formalin, is the standard fixative used for preserving biopsy specimens. It helps to maintain the tissue architecture and cellular details, making it suitable for histopathological examination. Ethanol is not typically used for routine tissue fixation as it can cause tissue shrinkage and distortion. Hydrogen peroxide is not a fixative and is used for different purposes, such as disinfection. A 1% formalin solution is too dilute for effective fixation.
76237
Physiology
Oxytocin causes contraction of the myoepithelial cells surrounding the mammary alveoli, which presses milk into the larger ducts and leads to the milk let-down reflex. This is essential for milk ejection during lactation.
93094
General PathologySystemic lupus erythematosus (SLE) is characterized by a malar rash, arthritis, serositis, and the presence of antinuclear antibodies.
58829
RadiologyInterproximal caries is best detected by bitewing radiography.
68582
Community DentistryA denturist is a dental auxiliary trained to fabricate and fit dentures directly for patients, without the supervision of a dentist in some jurisdictions.
38822
INI CET
Anaphylaxis is a severe, life-threatening allergic reaction. Because it can occur rapidly after exposure to penicillin, it is the most immediate clinical concern during administration.
22295
State PSC PYQSplinting mobile teeth helps to stabilize them by distributing the forces of chewing (occlusal forces) across a wider area, which reduces trauma to individual teeth and supporting structures. This stabilization is considered the primary objective in periodontal therapy. While it may indirectly help prevent further bone loss or improve comfort, the direct mechanical goal is force distribution.
53009
NEETMDS
Elgiloy wires are a cobalt-chromium-nickel alloy used in orthodontics that can be hardened by heat treatment to increase their strength and spring properties. Stainless steel, beta-titanium, and nickel-titanium wires have different properties and typically do not require hardening heat treatment in the same way.
59933
Oral Surgery
Local anaesthetics act by blocking voltage‑gated sodium
channels, preventing depolarization and conduction of nerve impulses.
The sensitivity of different nerve fibres depends on their diameter,
myelination, and conduction velocity. Type B fibres Small, myelinated preganglionic autonomic fibres. Moderately sensitive to local anaesthetics. Type C fibres Smallest, unmyelinated fibres. Carry dull, aching pain and temperature sensations. Most sensitive to local anaesthetics because
of their small diameter and lack of myelin. Type A‑delta fibres Small, thinly myelinated fibres. Carry sharp, pricking pain. Less sensitive than Type C fibres but more sensitive than
larger A‑alpha fibres. Fibres supplying muscle spindles (Type A‑alpha fibres) Large, heavily myelinated fibres. Conduct proprioception and motor signals. Least sensitive to local anaesthetics due to
their large diameter and thick myelin sheath. Local anaesthetics preferentially block small,
unmyelinated fibres first (Type C), followed by small myelinated fibres
(Type B, A‑delta). Large myelinated fibres (A‑alpha) are blocked last. This
explains why pain sensation is lost before motor function during local
anaesthesia.