Dentosphere : World of Dentistry

 # What is the final stage of tooth development? a. Crown formation. b. Root formation and eruption. c. Function. d. Dentinogenesis and amelogenesis. The correct answer is C. Function. Crown formation is followed by root formation and eruption. Root formation and eruption are followed by function. Function is the final stage of tooth development. Dentinogenesis and amelogenesis are followed by crown formation. CLICK HERE FOR MORE MCQs

 # Which is most difficult to diagnose? A. Necrosed pulp B. Internal resorption C. Chronic pulpitis D. Acute apical abscess The correct answer is C. Chronic pulpitis. Both necrotic pulp and chronic pulpitis are difficult to diagnose and can show varied symptoms.  Chronic pulpitis can be differentiated by its history of clinical symptoms.  Chronic pulpitis under a crown restoration is most difficult to diagnose.  This question is a direct pick from NBDE and the answer is Chronic Pulpitis.  CLICK HERE FOR MORE MCQs

 # The ‘ugly duckling stage’ is characterized by: A. Distoangular axial inclination of the crown of maxillary incisors B. Deep overbite C. Mandibular lateral incisors erupting lingual to mandibular central incisors D. Maxillary lateral incisors erupting lingual to maxillary central incisors The correct answer is A. Distoangular axial inclination of the crown of maxillary incisors. In some children, the maxillary incisors flare laterally and are widely spaced when they first erupt, a condition often called the "ugly duckling" stage. The position of the incisors tends to improve when the permanent canines erupt, but this condition increases the possibility that the canines will become impacted. Ref: Contemporary Orthodontics, Proffit, Fourth Edition, Page no. 101 CLICK HERE FOR MORE MCQs

 # The opening of submandibular gland duct into oral cavity is at: A. Maxillary Second molar B. Mandibular third molar C. Dorsum of tongue D. Sublinugual caruncle The correct answer is D. Sublingual caruncle. Submandibular duct or Warthin's duct is 5 cm long, emerges from submandibular gland and in its course runs on the hyoglossus between lingual and hypoglossal nerve and opens at the sublingual papilla at the side of frenum of tongue. CLICK HERE FOR MORE MCQs