NEET MDS Shorts
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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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EndodonticsIn post core preparation, the sectional gutta-percha technique is used. This technique involves: 1) Removing the coronal portion of gutta-percha for post space preparation, 2) Leaving the apical portion intact to maintain apical seal, 3) The gutta-percha is sectioned at a predetermined level (usually leaving 4-5mm apically), 4) Heat or solvents are used to remove only the coronal portion, 5) This maintains the apical seal while allowing post placement. Thermoplasticized and vertical techniques make removal more difficult, while lateral condensation can be sectioned but is not specifically designed for post preparation.
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Oral SurgeryThe scalpel blade most commonly used for oral surgical procedures is No. 15.
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ProsthodonticsThe occlusogingival height of guide plane flat surfaces should be 2-4mm. This height provides adequate guidance for insertion and removal while maintaining sufficient tooth structure. Less than 2mm provides inadequate guidance, while more than 4mm requires excessive tooth reduction and may compromise pulpal health.
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INI CET
While Coarctation is a major congenital cause, Acute Glomerulonephritis is a very common acquired cause of pediatric hypertension in the Indian clinical setting. However, the provided key emphasizes Coarctation.
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Physiology
Pacinian corpuscles are rapidly adapting mechanoreceptors that are highly sensitive to high-frequency vibrations and are responsible for detecting rapid changes in pressure.
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PeriodonticsSite-specific characteristics are not seen in herpetic gingivostomatitis.
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PeriodonticsCervical abrasion is often caused by improper brushing techniques, particularly horizontal brushing, which can wear away the enamel and dentin at the cervical area of the teeth.
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Oral SurgeryDiabetes affects wound healing and immune response. After surgery, stress and altered eating patterns can impact blood glucose levels. Monitoring and adjusting the insulin dosage as necessary is critical to prevent complications such as infection or delayed healing. Postoperative bleeding is important but secondary to glycemic control in diabetics.
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Dental MaterialsFins or spines may be produced on a casting because of 1.cracks in the investment 2. too rapid heating of the mold 3. steam production which causes the walls of the mold to flake off