NEET MDS Shorts
86741
Oral Medicine
In an unconscious patient, it is best to administer glucagon IM which can quickly raise blood glucose levels by mobilizing glycogen stores in the liver. Oral glucose cannot be given due to the patient's altered mental state.
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Oral PathologyA compound odontoma is a benign odontogenic tumor consisting of enamel, dentin, cementum, and pulp arranged in recognizable tooth-like structures. Radiographically, it appears as multiple small, tooth-like radiopaque structures, unlike complex odontomas, which show as masses of calcified material.
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Oral PathologyAll these conditions contain multinucleated giant cells histologically.
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Oral and Maxillofacial Surgery
Although overcrowding can contribute to impaction, it is not a
direct cause. The most common causes of impaction are insufficient space in the
dental arch and abnormal angulation of the tooth due to the presence of other
teeth or abnormal growth patterns. Genetic factors also play a significant role
as the size and shape of the jaw are inherited traits.
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General PathologyHereditary spherocytosis is primarily due to a deficiency of spectrin, a protein that helps maintain the integrity of the red blood cell membrane.
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EndodonticsDiscoloration due to pulp degeneration has the best prognosis for bleaching. This is because: 1) The staining is primarily from hemoglobin breakdown products which respond well to oxidizing agents, 2) The discoloration is usually uniform and not deeply embedded, 3) No metallic particles are involved, 4) Responds well to both vital and non-vital bleaching techniques. Tetracycline stains are difficult due to deep incorporation in dentin structure, restorative materials may contain metals, and erythroblastosis fetalis causes deep intrinsic staining that resists bleaching.
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ProsthodonticsOcclusal rims for making the jaw relations aid in all of the following except estimation of freeway space.
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Conservative DentistryThe C-factor is the ratio of bonded to unbonded surfaces in a dental restoration. When the C-factor increases, there are more bonded surfaces relative to the free surfaces where the composite can flow to relieve stress. This increased constraint leads to higher polymerization shrinkage stress and, consequently, greater overall shrinkage in the restoration.
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Dental Materials
As a luting material, zinc polycarboxylate should form a film of less than 25 µm.
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NEETMDS
The trypan blue exclusion test is a common method used to determine the number of viable cells in a cell suspension. Viable cells have intact cell membranes that exclude the dye, while dead or damaged cells take up the blue dye.