Dentosphere : World of Dentistry

 The reversal agent used in clinical practice to treat benzodiazepine overdose A. Romazicon  B. Naloxone C. Sublimaze D. Demerol The correct answer is A. Romazicon. -Flumazenil (Romazicon) is a direct, specific reversal agent used in clinical practice to treat benzodiazepine overdose. Pharmacologically, it acts as a competitive antagonist at the benzodiazepine receptor sites in the CNS.  -Naloxone is a life-saving medication that can reverse an overdose from opioids, including heroin, fentanyl, and prescription opioid medications. -Fentanyl (Sublimaze) is a potent synthetic opiate agonist. A dose of 0.1 mg is approximately equivalent to 10 mg of morphine or 75 mg of meperidine. Fentanyl acts rapidly, and after intramuscular injection the onset occurs in 7–15 min; duration of effects is 1– 2 h. -Meperidine (Demerol) is a synthetic opiate agonist, closely related to fentanyl in chemical structure. Reference: Mc Donald 2nd South Asian Edition

 # Genetic factors play a role in the aetiology of:  A. Chronic periodontitis  B. Aggressive periodontitis  C. Both of the above  D. None of the above  The correct answer is C. Both of the above. Though genetic factors play a dominant role in Aggressive cases, they are considered to be the aetiological factors in all kinds of periodontitis. 

 # Incisor liability is about ………..in maxillary arch. A. 4.6 mm  B. 5.4 mm  C. 6.2 mm  D. 7.6 mm  The correct answer is D. 7.6 mm. Incisor liability is about 7.6 mm in maxillary arch and 6 mm in mandibular arch . The incisor liability is compensated by three mechanisms: a. Increased intercanine width: During the period of permanent incisor eruption, significant amount of increase in intercanine arch width occurs. It is about 3–4 mm. b. Interdental spacing: Spacing present in primary dentition helps in alignment of incisor. The primate space present in the upper arch mesial to primary canine is also used. c. Labial eruption of incisor: Primary incisor stand upright. The permanent incisors, which replace them, are labially proclined placing them in a wider arch. Source: Mc Donald 2nd South Asian Edition

# Salt and pepper appearance in radiograph is seen in: A. Osteoporosis B. Osteopetrosis C. Sickle cell anemia D. Thalassemia The correct answer is D. Thalassemia. "Crew - cut" or "Hair - on - end" appearance of skull is characteristic of both sickle cell anemia and thalassemia. In thalassemia radiographs of maxilla and mandible shows characteristic apparent coarsening of some trabeculae and the blurring and disappearance of others, resulting in "salt and pepper" effect.

 # Primary HSV infection for first few days is associated with elevated level of immunoglobulin:  A. IgG  B. IgA  C. IgM  D. IgE  The correct answer is C. IgM. Primary HSV infection is associated with elevated immunoglobulin (Ig)M titers that occur within days, followed several weeks later by permanent IgG titers (seroconversion) that indicate previous infection but confer no protection against reactivation. Recurrent infection is associated with a rise in IgG antibody titer in acute and convalescent sera, but a fourfold rise (a criterion that indicates active infection) is seen in only 5% of patients. The assay for HSV IgM is not particularly reliable for diagnostic purposes and overall, the use of serology to diagnose recurrent infection is not advised. CLICK HERE FOR MORE MCQs

 # HSV-1 infection of skin spread through the sport of wrestling. This is called:  A. Herpetic whitlow  B. Herpes gladiatorum  C. Herpes zoster sine  D. Herpetic shingles  The correct answer is B. Herpes gladiatorum. HSV‐1 or ‐2 may cause herpes whitlow, an infection of the fingers when virus is inoculated into the fingers through a break in the skin. This was a common occupational hazard (including within the dental profession) before the widespread use of gloves. Other HSV‐1 infections include herpes gladiatorum (infections of the skin spread through the sport of wrestling), herpes encephalitis, HSV esophagitis, HSV pneumonia and neonatal and disseminated infection. CLICK HERE FOR MORE MCQs

 # Stieglitz pliers are used to: A. Contour matrix bands B. Hold the silver point C. Remove roots during hemisection D. Place rubber dam clamp on the tooth The correct answer is B. Hold the silver point. Stieglitz forceps come with carbide tips for extra grip and are used for retrieving separated files, silver points, and root fragments. For the orientation use the following: North South (N/S) - bucco-lingual chamber orientation of anteriors and bicuspids East West (E/W) - mesio-distal chamber orientation of molars