NEET MDS Shorts
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RadiologyOrotic acid forms radiopaque stones, while Xanthine, Cysteine, and Allopurinol form radiolucent stones. Radiolucent stones are not visible on plain radiographs due to their composition being similar to soft tissue density. Orotic acid stones contain calcium and are therefore radiopaque.
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Periodontics2% fluoride is one of the most commonly used desensitizing agents in dentistry. It works by strengthening enamel and reducing the permeability of dentin, which helps alleviate sensitivity in teeth. Fluoride treatments are widely used in clinical practice to manage dentinal hypersensitivity effectively.
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Oral PathologyExplanation: Prodromal symptoms are early signs that precede the full onset of a disease. In the case of viral fevers, patients often experience nonspecific symptoms such as malaise, fatigue, and low-grade fever 1 to 2 days before the more specific symptoms of the viral infection appear.
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Oral PathologySialography is a radiographic examination of the salivary glands and their ducts, typically involving the injection of a contrast medium to visualize their structure and detect abnormalities.
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General MicrobiologyPrions are infectious proteins that are highly resistant to destruction by proteases and other methods that typically degrade proteins. This resistance is what allows them to persist in the host and cause disease. They do not contain nucleic acid, which is a hallmark of other types of infectious agents such as bacteria, viruses, and fungi.
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ProsthodonticsWhen replacing all missing mandibular incisors with PFM restorations, both canines should be used as abutments. The canines provide adequate support for the four-unit bridge due to their long roots and favorable crown-to-root ratio. Including premolars would create an unnecessarily long span and increase the risk of failure. The canine-to-canine bridge is biomechanically sound and commonly successful.
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MicrobiologyThe most pronounced effect on the oral microflora of a reduction in rate of salivary flow is a shift towards a more acidogenic microflora
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RadiologyA ghost-like shadow is seen in an OPG.
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General PathologyHemochromatosis is a condition characterized by excessive iron accumulation in the body, which can lead to a false positive on metal detectors due to high iron levels in tissues.
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Oral SurgeryA prothrombin time of 45 seconds (normal 11-15 seconds) indicates severe coagulopathy and contraindications extraction. This prolonged PT suggests either excessive anticoagulation or severe liver dysfunction, both of which significantly increase bleeding risk. The procedure should be postponed until coagulation parameters are normalized.