NEET MDS Shorts
46469
INI CET
The bowstring test is used clinically to evaluate the attachment of the medial canthal tendon (MCT) to the bone by observing lateral displacement, indicating potential injury or avulsion.
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PharmacologyCompetitive antagonists bind to receptors but do not activate them, meaning they have no intrinsic activity. They have affinity for the receptor, allowing them to compete with agonists for binding.
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Oral PathologyMean exposure of radiation from a pantomograph is approximately 250 mR.
45993
Oral SurgeryThe inferior alveolar nerve block (IANB) is a common technique used in dentistry to anesthetize the mandibular teeth, including the molars. The nerve exits the mandibular foramen and runs along the mandibular canal before it branches into the incisive and mental nerves. For effective anesthesia, the injection site is typically located between the first and second premolars, aiming towards the medial surface of the ramus of the mandible, and the needle is inserted until it is just inferior to the root apices of these teeth. This position allows the anesthetic solution to reach the nerve as it emerges from the bone and before it gives off its major branches, thus achieving profound anesthesia for the procedure.
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NEETMDS
The amount of polymerization shrinkage in composite materials is directly related to the volume fraction of the polymer matrix; increasing the size and number of inorganic filler particles reduces the relative amount of polymer, thus decreasing overall shrinkage.
94347
Oral SurgeryPerform Caldwell-Luc to remove the tip: The Caldwell-Luc procedure (or a modified, less invasive version) has long been considered the standard surgical method for retrieving a displaced root or foreign body from the maxillary sinus, especially when it is mobile within the sinus cavity or the condition has become chronic. It involves creating a small bone window in the anterior wall of the maxillary sinus to access and remove the fragment.
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General MicrobiologyHLA (Human Leukocyte Antigen) class I antigens are crucial in the immune response to infections and also play a significant role in graft rejection. They present antigens to CD8+ T cells (cytotoxic T cells), which then target and destroy infected or foreign cells. While they do not directly activate B cells or CD4+ T cells, they are involved in the recognition of cells by the adaptive immune system and thus are important in the overall immune response.
79422
INI CET
The presence of bony fusion on a CT scan is indicative of ankylosis and can assist in planning surgical intervention.
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ProsthodonticsIsolated recession on a labially prominent upper canine is noted. Examination revealed absence of keratinized gingiva in that area and the vestibule is shallow. The best method to create a zone of attached gingiva in this case is a free pedicle graft.
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Oral medicineAcetic acid is not used for chemical cautery. Chemical cautery agents include chromic acid, silver nitrate, and trichloroacetic acid, which cause protein coagulation and tissue destruction. Acetic acid is too weak and is mainly used for diagnostic purposes (acetowhite test).