NEET MDS Shorts
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Physiology
Mossy fibers originate from various sources in the brain and spinal cord and terminate on granule cells in the granular layer of the cerebellum. The axons of granule cells, called parallel fibers, stimulate the purkinje cells and also synapse with interneurons such as stellate and basket cells in the molecular layer and Golgi cells in the granular layer. Climbing fibers originate from the inferior olivary nuclei and synapse directly on purkinje cells. The statement that stellate and basket cells are stimulated by inhibitory inputs from purkinje cells is incorrect; they are stimulated by parallel fibers and inhibit purkinje cells. Golgi cells are also stimulated by mossy fibers and help in the regulation of the overall output of the cerebellum.
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Pharmacology
first choice pethidine Use of MAO inhibitors in patient taking pethidine / pentazocine can precipitate serotonin syndrome.
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Endodontics
Explanation: In the WHO classification, avulsion refers to the complete
displacement of a tooth from its socket, and it is classified under 873.61. This
classification is crucial for understanding the severity of the injury and
determining the appropriate treatment.
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PedodonticsThe OHI-S index has a high degree of correlation with the PI of Russell.
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Conservative DentistryDuring cavity preparation, the most common area for exposure is a Class V cavity in the first premolar. A Class V cavity is a five-sided cavity that involves the gingival margin of the tooth and the proximal surface. These cavities are particularly prone to exposure because the gingival tissue in this region can be thin, and the proximity to the bone can lead to inadvertent damage during the preparation process.
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Oral PathologyFrequent bouts of epistaxis (nosebleeds) are a classic and often the earliest symptom of hereditary haemorrhagic telangiectasia (HHT), also known as Osler-Weber-Rendu disease. This genetic disorder causes abnormal blood vessel formation (telangiectasias) in various organs, particularly the nose, leading to recurrent bleeding.
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PedodonticsA gingival index score of 2 means probing elicits bleeding.
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NEETMDSVitamin D deficiency, commonly associated with rickets in children, can lead to various dental manifestations. Among the given options, delayed tooth eruption is a known sign of this deficiency.
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Oral PathologyLetterer-Siwe disease is a disturbance of lipid metabolism.
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Oral and Maxillofacial SurgeryAbsorbable sutures are particularly beneficial for pediatric patients who may struggle to return for suture removal. These sutures dissolve over time, eliminating the need for a follow-up visit to remove them