NEET MDS Shorts
88685
Dental Materials
The pH values provided in the text indicate that zinc polycarboxylate cement reaches a pH of 5.8 after 28 days.
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Public Health DentistryAns. 2.. (Europe 1964 trade name Duraphat 25-75% caries reduction)
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Conservative DentistryExplanation: In modified Class III cavity restorations, particularly those involving composite materials, retention is often achieved through acid etching. This process creates micro-retentive features on the enamel and dentin surfaces, allowing the bonding agent to penetrate and create a strong bond with the tooth structure. While retentive grooves, points, and pins can also be used, acid etching is a fundamental technique that enhances retention in adhesive dentistry.
51263
Physiology
Answer: 4) Mobilizing energy and preparing the body for immediate action
Explanation: The sympathetic nervous system is activated during the fight-or-flight response to mobilize energy and prepare the body for immediate action. It does this by increasing heart rate, dilating pupils, and diverting blood flow to muscles and the brain, among other effects.
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General Medicine
Digoxin is a positive inotrope, hence it increases the force of myocardial contraction and may be effective in heart failure. It is a cardiac glycoside, which reduces the conductivity of the atrioventricular (AV) node and which may be used in atrial fibrillation.
Digoxin has a long half-life and is given once daily. It is cleared by the renal system and hence renal impairment requires the reduction of digoxin dose.
Arrhythmias, such as atrial tachycardia, may be a sign of digoxin toxicity.
Digoxin toxicity is enhanced if there are 67 electrolyte disturbances, especially hypokalaemia, hypomagnesaemia and hypercalcaemia.
21923
NEETMDSThe plateau phase is a sustained depolarization during the action potential, which is a characteristic feature of cardiac muscle cells, including those in the Purkinje fibers, atria, and ventricles. It is caused by the prolonged opening of voltage-gated calcium channels. Among the options provided, Purkinje fibers exhibit this phase.
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RadiologyThe size of the focal spot influences radiographic definition.
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RadiologyZygoma fractures are best viewed by occipitomental (Waters) view. This projection provides optimal visualization of the zygomatic complex, including the zygomatic arch, zygomaticomaxillary sutures, and orbital rim, which are commonly involved in zygomatic fractures.
88588
Oral PathologyCervical sympathetic paralysis (Horners syndrome) causes anhidrosis of the homolateral (same) side of the face due to loss of sympathetic innervation to sweat glands. This results in decreased sweating on the affected side. Facial nerve trauma affects motor function, trigeminal nerve trauma affects sensation, and cerebral embolus affects central function, but none specifically cause unilateral facial anhidrosis.
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Conservative DentistryTo diagnose class III caries clinically, which is caries that involves the proximal surfaces of teeth, a good supplement to radiographs is to examine the proximal surfaces for any color changes, particularly at the contact points where two teeth touch. This is often done using a combination of visual inspection and the use of a dental explorer to detect cavities and softened enamel. However, the answer provided, "Caries activity tests," refers to methods used to assess the activity or inactivity of a caries lesion, not necessarily for diagnosis.