NEET MDS Shorts
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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.
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ProsthodonticsInternal resorption in a tooth is seen as a non-proliferation lesion.
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Dental Materials
An obtundent is used to reduce post-operative sensitivity by sealing the dentinal tubules and protecting the pulp.
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Periodontics
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General MedicineA CT scan is more sensitive than a chest X-ray for identifying metastatic lung disease and is typically used for such screenings.
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EndodonticsCondensing osteitis (focal sclerosing osteomyelitis) is a radiopaque lesion representing a localized bony reaction to a low-grade inflammatory stimulus. It most frequently affects the mandibular first molar in young patients and is typically asymptomatic, discovered incidentally on radiographs.
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NEETMDSFlexible partial dentures reduce the leverage effects on abutment teeth due to their inherent material properties. However, a major disadvantage of long-span flexible major connectors is that their increased flexibility can lead to excessive forces being transmitted to the underlying residual ridge and the periodontal ligament of the abutment teeth, as the force is less distributed compared to a rigid connector. This can accelerate residual ridge resorption and damage the abutment teeth.
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Oral PathologyCorticosteroids are the drug of choice in facial nerve palsy (Bells palsy), especially when initiated within 72 hours of onset. Corticosteroids reduce inflammation and edema of the facial nerve within the narrow facial canal, improving recovery outcomes. Vitamin A and anti-inflammatory drugs are not first-line treatments for facial nerve palsy.
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Oral SurgeryEpinephrine is not compatible with general anesthetic agents that sensitize the myocardium to catecholamines, increasing the risk of cardiac arrhythmias. Halothane and cyclopropane are known to have this effect, making their combined use with epinephrine contraindicated.
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Orthodontics
SOLUTION Altered respiratory pattern, such as breathing through the mouth rather than the nose, could change the posture of the If these postural changes were maintained, face height would increase, and posterior teeth would super-erupt;
head, jaw, and tongue. This in turn could alter the equilibrium of pressures on the jaws and teeth and affect both jaw growth and tooth position.
In order to breathe through the mouth, it is necessary to lower the mandible and tongue, and extend (tip back) the head.
unless there was unusual vertical growth of the ramus, the mandible would rotate down and back, opening the bite
anteriorly and increasing overjet; and increased pressure from the stretched cheeks might cause a narrower maxillary dental arch.