NEET MDS Shorts
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PhysiologyThe acrosome is a cap-like structure located on the head of a spermatozoon. It contains lysosome-like organelles rich in enzymes that are essential for penetrating the egg's outer layers during fertilization.
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Oral PathologyFibrous ankylosis is the most common complication of rheumatoid arthritis involving the TMJ. RA causes chronic synovitis, leading to destruction of articular cartilage and subchondral bone. This inflammatory process results in scar tissue formation and fibrous adhesions between articular surfaces, causing restricted mouth opening. While condylar resorption may occur, fibrous ankylosis is more frequent and characteristic of RA progression.
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Oral PathologyA prothrombin level of 20% normal PT is of concern for dental extractions.
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General MicrobiologyPrions are infectious agents composed solely of protein. They do not have nucleic acids like DNA or RNA and are responsible for several neurodegenerative diseases. The primary reservoir for prions is thus the proteinaceous particles themselves.
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Oral PathologyPaget's disease is the most likely underlying cause for gradual loss of visual acuity and hearing power in a 50-year-old man.
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ProsthodonticsWhen replacing several missing anterior and posterior teeth, the closed horseshoe design is the maxillary major connector of choice. This design provides good rigidity while avoiding the anterior palatal tissues, which is important when anterior teeth are being replaced. It offers better patient acceptance than complete palatal coverage.
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Oral SurgeryThe Gillies approach is a surgical technique used in facial reconstruction, particularly for the repair of facial defects. The superficial temporal artery is of significant anatomical importance during this procedure, as it supplies blood to the scalp and face. Surgeons must be cautious to avoid damaging this artery during the approach.
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General MicrobiologyExotoxins are produced and secreted by bacteria into the surrounding environment. They are typically proteins that can cause damage to the host by disrupting cellular processes. This active secretion distinguishes them from endotoxins, which are part of the bacterial cell wall and are released upon cell lysis.
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INI CET
In the presence of a confounding variable, the observed association between a disease and a factor is often spurious, meaning it appears to be a direct causal link but is actually due to the influence of the unmeasured confounding factor.
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Oral SurgeryInferior alveolar nerve block is absolutely contraindicated in patients suffering from haemophilia.