NEET MDS Shorts
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RadiologyIn radionuclide imaging, the most useful radiopharmaceutical for skeletal imaging is Technetium-99m linked to Methylene diphosphonate.
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EndodonticsFor mild tetracycline staining in a 12-year-old child, at-home bleaching is the most conservative and effective first-line treatment. It uses lower concentrations (10-15% carbamide peroxide) which are safer for young patients, provides gradual treatment that reduces sensitivity. Hydrochloric acid microabrasion is too aggressive for mild stains, Superoxol (30% H2O2) is too strong for vital teeth in children, and composite veneers are too invasive for mild discoloration.
27657
NEETMDS
Cushing's syndrome involves excess cortisol, which typically leads to hyperglycemia (high blood sugar) due to increased gluconeogenesis. Hypoglycemia is not a typical manifestation.
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Oral PathologyPlummer-Vinson syndrome is strongly associated with post-cricoid carcinoma and esophageal web formation. It is due to iron deficiency (not folic acid), is more common in females (especially middle-aged women), and IS associated with oral premalignant lesions and increased risk of upper digestive tract malignancies. The syndrome represents a premalignant condition with significant cancer risk, particularly in the post-cricoid region.
76052
EndodonticsInternal resorption in a vital symptomatic tooth requires complete pulpectomy to remove all pulp tissue causing the resorption. Pulpotomy would leave infected pulp tissue that continues the resorptive process.
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Oral PathologyPagets disease shows a characteristic mosaic pattern of bone on radiographs due to irregular bone remodeling with alternating areas of bone resorption and formation. This creates a "jigsaw puzzle" or mosaic appearance with cement lines separating areas of old and new bone. Fibrous dysplasia shows ground-glass appearance, osteopetrosis shows marble bone appearance, and osteogenesis imperfecta shows thin cortices.
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EndodonticsThe length of time the tooth was out of the mouth directly affects the prognosis of an avulsed tooth most significantly. Critical time factors: 1) <30 minutes - excellent prognosis if properly managed, 2) 30-60 minutes - fair prognosis with increased risk of complications, 3) >60 minutes - poor prognosis with high likelihood of replacement resorption, 4) >2 hours - very poor prognosis. Extraoral time determines periodontal ligament cell viability, which is crucial for successful reattachment. While other factors matter, extraoral time is the most critical prognostic factor for avulsed teeth.
67195
Dental Materials
Agar hydrocolloid must be heated to a liquefaction temperature between 70°C and 100°C to be suitable for impression taking.
89037
INI CET
Tapping of the bone is performed in dense bone (Type 1 or 2) to create threads that match the implant. This reduces insertion torque and prevents bone necrosis. In softer bone, implants are typically self-tapping.
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INI CET
Steiner's analysis uses the Gonion-Gnathion (Go-Gn) plane to represent the mandibular plane in relation to the SN line.