Dentosphere : World of Dentistry

  # The preferred agent for base formation below restorative resin is: A. Calcium hydroxide B. Cavity varnish C. Zinc oxide-eugenol cement D. None of the above # Dentin protection during cavity restoration is most important when the "remaining dentin thickness" is: A. 1 - 2mm B. 1.5 mm C. 0.5 - 1mm D. 0.5 mm # Cavity varnish is indicated under amalgam restorations to: A. Prevent galvanic currents from reaching the pulp B. Improve the marginal seal of the restorations C. Seal the dentinal tubules completely D. Act as an effective thermal insulator # Calcium hydroxide is preferred to ZOE fillings below a composite resin restoration as: A. Calcium hydroxide forms a calcific bridge B. Eugenol irritates the inflamed pulp C. Eugenol interferes with the setting of composite resins D. None of the above # When using the acid etch technique to restore a Class IV fracture, exposed denti...

  # In class II cavity for inlay, the cavosurface margin of the gingival seat clears the adjacent tooth by: A. 0.20 ± 0.05mm B. 0.50 ± 0.20mm C. 0.80 ± 0.35mm D. 1.10 ± 0.45mm # Cavities beginning in the proximal surfaces of bicuspids and molars are: A. Class 1 B. Class 2 C. Class 4 D. Class 6 # Incipient caries consists of opaque, chalky white areas that appear when the tooth surface is dried, this is referred as: A. white spot B. hot spot C. translucent zone D. body of lesion # Pit and fissure caries is seen in: A. Class I B. Class I compound C. Class II D. Class II compound # Smear Layer consists of: A. Enamel debris B. Micro organisms C. Dentinal chips D. all of the above # A butt joint is a: A. 90° joint B. 120° joint C. 70° joint D. 180° joint # Enameloplasty is: A. Filling of enamel fissures with amalgam B. Elimination of shallow...

 # The most reliable sign of sexual maturity in girls is: A. Change in voice B. Age at first menstruation C. Appearance of pubic hairs D. Breast development The correct answer is B. Age at first menstruation. An interesting phenomenon of the last 300 or 400 years, particularly the 20th century, has been a generalized increase in size of most individuals. There has also been a lowering in the age of sexual maturation, so that children recently have grown faster and matured earlier than they did previously. Since 1900, in the United States the average height has increased 2 to 3 inches, and the average age of girls at first menstruation, the most reliable sign of sexual maturity, has decreased by more than 1 year. This “secular trend” toward more rapid growth and earlier maturation continued in most countries throughout the 20th century (e.g., the mean age in Poland in 1982 to 1984 was 13.2 years, and 12.8 years in 1992 to 1994) but seems to be leveling off in the developed countries...