Dentosphere : World of Dentistry

# Medial dislocation of fractured condyle in subcondylar fracrure is caused by: A. Medial pterygoid B. Lateral pterygoid C. Masseter D. Buccinator # A dental surgeon has recoverd from Hepatitis B by 3 months rest. His laboratory findings are normal but he is not allowed to attend patients as per medical board as he is: A. healthy carrier B. active carrier C. convalescent carrier D. paradoxical carrier

# Which of the following is not seen in posterior triangle of neck: A. Hypoglossal nerve B. Subclavein vein C. External jugular vein D. Phrenic nerve # Which of the following is derived from second brachial arch: A. muscle of facial expression B. masticatory muscles C. mandible D. condyle

 # The duration of fixation generally required for fracture of mandible: A. 2-4 weeks B. 3-5 weeks C. 6-8 weeks D. 8-10 weeks The correct answer is C. 6-8 weeks. In the past, one of the major considerations in the immediate postoperative period was the difficulty resulting from IMF. When  the jaws are wired together, the patient has initial difficulties in obtaining adequate nutrition, performing necessary oral hygiene, and communicating verbally. The average IMF period ranges from 6 to  8 weeks. Reference: Contemporary Oral and Maxillofacial Surgery, James R. Hupp, 6th Edition 2013, Page No:  557 CLICK HERE FOR MORE MCQs

 Tonsillitis Inflammation of palatine tonsils is called tonsillitis. Each tonsil is a mass of lymphoid tissue at the back of your throat-one on each side. What is the role of tonsils in our body? It provides local immunity and surveillance to our body to fight against foreign intruders. Tonsils are most active from 4 to 10 years of age. After puberty, gradual involution of the tonsils takes place.. Types: 1.Acute tonsillitis 2.Chronic tonsillitis Etiology: - Most common in school going children but may affect adult. Viruses are the most common offenders in tonsillitis. 1.Adenovirus 2.Influenza virus 3.Parainfluenza virus 4.Herpes simplex virus (HSV) - Hemolytic streptococcus is a common bacteria causing tonsillitis. Other bacteria causing tonsillitis are: 1.Staphylococci 2.Pneumococci 3.Haemophilus Influenzae What are the symptoms of Acute tonsillitis? The most common symptoms of tonsillitis are: 1. Enlarged, red tonsils 2. Sore throat 3. Not able to swallow due to which drooling m...

 # A bony opening in the canine fossa is commonly used to: A. Enter the maxillary sinus B. Establish drainage of an alveolar abscess C. Remove mandibular third molars D. Uncover and marsupialize a cyst The correct answer is A. Enter the maxillary sinus. The wall of the sinus is very thin in this area. This area is used for following: (i) Diagnostic aspiration, and (ii) The site for Caldwell-Luc operation; that is, the antral exploration with or without an intraoral antrostomy. Reference: Textbook of Oral and Maxillofacial Surgery, Third Edition, Neelima Anil Malik, Page no.  639 CLICK HERE FOR MORE MCQS

 # Most frequent site for dry socket is: A. Upper molar area B. Upper incisor area C. Lower molar area D. Lower incisor area The correct answer is C. Lower molar area. 'Dry socket' derives its name from the fact that after the clot is lost the socket has a dry appearance because of the exposed bone. This condition is more common in women and tobacco users, and is most frequently associated with difficult or traumatic extractions and thus most commonly follows removal of an impacted mandibular third molar. In a series of 138 ‘dry sockets’ among 6,403 teeth extracted in human patients, Krogh reported that 95% were in lower bicuspid and molar sockets, and this is confirmed by most other large series of cases. Reference: Shafer’s Textbook of ORAL PATHOLOGY, 7th Edition, Page No:  601 CLICK HERE FOR MORE MCQs

 # Which one of the following is not a valid indication for apicoectomy? A. Broken instrument in the apical third of the canal B. Presence of a fistula C. Perforation in apical third D. Periapically involved teeth in patients with insufficient time for conventional endodontic treatment The correct answer is D. Periapically involved teeth in patients with insufficient time for conventional endodontic treatment Valid Indications for which apicoectomy can be considered are: - Failure of nonsurgical endodontic treatment - Failure of previous surgery - Anatomical problems: non-negotiable or blocked canal, or severe root curvature - Iatrogenic errors: ledging of canals, blockage from debris, separated instruments, overfilling of canals leading to foreign body reaction, and apical canal transportation - Horizontal apical root fracture - Exploratory surgery and biopsy: in teeth where a fracture is suspected or in teeth with vital pulp with a radicular radiolucency - Periodontal considerati...