Dentosphere : World of Dentistry

# Which of the following describes the BEST management strategy for a separated instrument AFTER cleaning and shaping has occurred? A. Do not attempt to remove and proceed to obturation B. Place calcium hydroxide C. Attempt to bypass the instrument The correct answer is A. Do not attempt to remove and proceed to obturation. If an instrument separates at the filling/obturation stage, the instrument does NOT require removal because the etiology of the problem has already been resolved through cleaning and shaping of the canals. The prognosis for the tooth will be considered more favorable if the infected dentin has already been debrided from the canal. The prognosis for the tooth will also be considered more favorably the more apical the instrument separation occurred. CLICK HERE FOR MORE MCQs

# Which of the following types of trauma is LEAST likely to result in pulpal necrosis? A. Lateral luxation B. Avulsion C. Subluxation D. Concussion E. Extrusion  The correct answer is D. Concussion.  Concussion - An injury to the tooth supporting structures without increased mobility or displacement of the tooth, but can present with pain to percussion. Pulpal necrosis can occur following a serious tooth trauma, especially if the the apical blood vessels are severed. Subluxation- An injury to the tooth supporting structures resulting in increased mobility, but without displacement of the tooth. Bleeding from the gingival sulcus confirms the diagnosis. Extrusion- The partial displacement of the tooth out of its socket. CLICK HERE FOR MORE MCQs

# When designing a flap for a periodontal surgery, which of the following findings is most influential? A. Probing depth B. Frenum attachment level C. Vestibular depth D. Quantity of attached gingiva E. Presence of intrabony defect Attached gingiva maintains a tight contact with the periosteum of the bone and certain areas of the tooth root. Its function is to keep the free gingiva in close contact with the tooth while also protecting the soft and free moving alveolar mucosa. Insufficient attached gingiva makes the mucosa more prone to trauma during function and compromises the periodontal support of teeth. In order to avoid periodontal problems after surgery, the width of the attached gingiva must be preserved. CLICK HERE FOR MORE MCQs

# Paracetamol is contraindicated in: A. Nephritis B. Chronic hepatitis C. Bleeding disorders D. Pregnancy The correct answer is B. Chronic Hepatitis.  Most prominent toxic effect associated with acetaminophen use is hepatic necrosis.  Paracetamol (Acetaminophen) has only analgesic and antipyretic action without any anti inflammatory action. Hypersensitivity reactions to paracetamol are rare and can be given to patients to whom aspirin is contraindicated. The most serious acute adverse effect of overdose of acetaminophen is a potentially fatal hepatic necrosis. Renal tubular necrosis and hypoglycemic coma may also occur.  CLICK HERE FOR MORE MCQs

# Pessaries are the dosage forms of drug at the following mucosal sites? A. Vagina B. Oral Cavity C. Bronchi D. Anal canal The correct answer is A. Vagina. Pessaries are a form of topical application of drug in the vagina for localized action. CLICK HERE FOR MORE MCQs

# The pain on swallowing or turning the head associated with elongated styloid process is known as: A. Tic douloureux B. Gorham syndrome C. Costen syndrome D. Eagle’s syndrome The correct answer is D. Eagle's Syndrome. The association of an elongated styloid process with pharyngeal and cervical pain is known as Eagle syndrome and was first described in 1937. Eagle syndrome is characterized as a dull, aching pain localized to one or both sides of the throat with referred otalgia. CLICK HERE FOR MORE MCQs

# In unilateral TMJ ankylosis, chin is deviated to: A. The contralateral side B. The affected side C. No deviation seen D. Side where growth is occurring The correct answer is B. The affected side. Unilateral TMJ ankylosis  Seen in a child or in a person where the onset was usually in the childhood. 1. Obvious facial asymmetry. 2. Deviation of the mandible and chin on the affected side. 3. The chin is receded with hypoplastic mandible on the affected side. 4. Roundness and fullness of the face on the affected side. 5. The appearance of the flatness and elongation on the unaffected side. 6. The lower border of the mandible on the affected side has a concavity that ends in a well defined antegonial notch. 7. In unilateral ankylosis, some amount of oral opening may be possible. Interincisal opening will vary depending on whether it is fibrous or bony ankylosis. 8. Cross bite may be seen. 9. Class II angles malocclusion on the affected side plus uni...