NEET MDS Shorts
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.
16741
Oral Surgery
The coronoid process can become impinged due to
displacement of the zygomatic arch, restricting the movement of the mandible and
causing trismus (difficulty in mouth opening).
63241
Dental Materials
Etching of tooth surface with 37% phosphoric acid creates microporosities in the enamel and dentin. This is the main method of adhesion of composite resin to tooth surface.
After etching the surface energy of the enamel will increase. This will make it very sticky to any kind of contaminants. If salivary contamination will occur, the salivary proteins will precipitate in the microporosities. This will prevent the adequate penetration of the bonding agent, therby reducing the micotag formation. Hence, complete isolation is essential.
56556
Dental Materials
ZnO is a filler in Gutta Percha, and it improves the strength and flexibility of the material.
45482
State PSC PYQThe classification uses a Venn diagram to combine multiple occlusal characteristics.
75267
General PathologyHyperparathyroidism and pseudohypoparathyroidism can lead to bone demineralization, while osteopetrosis is characterized by increased bone density.
21261
NEETMDS
TEGDMA (triethylene glycol dimethacrylate) is a common, low-viscosity monomer used as a diluent in dental composites to reduce the high viscosity of BisGMA and improve handling properties.
22533
Dental MaterialsGIC has an anticarious anticariogenic effect, It binds to tooth structure, Does not irritate the pulp tissue
58891
Physiology
Answer: 1) Contraction
Explanation: Norepinephrine acts on alpha-adrenergic receptors on the pupillary dilator muscle, causing its contraction and pupil dilatation (mydriasis). This is part of the sympathetic nervous system's response to stress and increased alertness during the fight-or-flight response.
98315
Prosthodontics
The reciprocal clasp arm is designed to
counteract the forces exerted by the retentive clasp arm during
insertion and removal of a removable partial denture (RPD). It should be placed on the lingual surface of the abutment
tooth. The correct position is at the junction of the middle and
gingival thirds of the tooth. This ensures: Stability against lateral forces. Reciprocation to balance the retentive clasp. Comfort and minimal interference with
occlusion. Retentive clasp arm → placed in the gingival third
(below the height of contour). Reciprocal clasp arm → placed in the middle third or
at the junction of middle and gingival thirds (above the height of contour). Together, they provide retention + reciprocation for
functional balance.