Dentosphere : World of Dentistry

# Which of the following is called cardiac glycosides? A. Digitalin B. Belladonna C. Reserpine D. Colchicum Cardiac glycosides are a class of organic compounds that increase the output force of the heart and increase its rate of contractions by acting on the cellular sodium-potassium ATPase pump. Their beneficial medical uses are as treatments for congestive heart failure and cardiac arrhythmias; however, their relative toxicity prevents them from being widely used. Cardiac glycosides can be more specifically categorized based on the plant they are derived from, as in the following list. For example, cardenolides have been primarily derived from the foxglove plants Digitalis purpurea and Digitalis lanata, while bufadienolides have been derived from the venom of the cane toad Bufo marinus, from which they receive the “bufo” portion of their name. Cardiac glycosides have long served as the main medical treatment to congestive heart failure and cardiac arrhythm...

# The middle meningeal artery: (MAN -95) a) Enters the skull through the foramen ovale b) Supplies the superolateral surface of the ipsilateral cerebral hemisphere c) Runs a subdural course within the cranial cavity d) Gives an interior branch which runs deep to the pterion The correct answer is D. Gives an interior branch which runs deep to the pterion The middle meningeal artery enters the middle cranial fossa through the foramen spinosum. In middle cranial fossa, it has an extradural course and divides into anterior frontal branch and posterior parietal branch. The frontal branch is closely related to the motor area of the cerebral cortex. It is the commonest source of extradural hemorrhage and results in hemiplegia of the opposite side. The parietal branch is closely related to the cerebrum and its involvement result in contralateral deafness. 

# Which one of the following is a junction of frontal, parietal, temporal and greater wing of sphenoid bone?   A. Pterion  B. Lambda  C. Vertex  D. Inion # A non synovial joint with dense connective tissue between two bony surfaces is termed as:  A. Synchondrosis  B. Syndesmosis  C. Symphysis  D. Suture

14th MARCH 2019 B.P. Koirala Institute of Health Sciences, Dharan, Nepal 5th year BDS FINAL EXAMINATION, MARCH 2019 Paper - IV  (ORAL & MAXILLOFACIAL SURGERY) Time - 2 Hours  Total Marks: 80 SHORT ANSWER QUESTIONS SECTION - 'A' Maximum Marks - 40 1. Explain the pathophysiology of osteomyelitis of jaws.   (4) 2. Discuss the clinical features of trigeminal neuralgia and enlist different treatment options. (2+3=5) 3. Enlist FOUR clinical features of zygomatic arch fracture. Add a note on Gillies temporal approach to indirect reduction. (2+3=5) 4. Enlist the clinical test to diagnose oro-antral communication and add a note on management of oroantral communication. (2+4=6) 5. Discuss briefly on different types of dislocation and enumerate the surgical procedures for the management of chronic recurrent temporomandibular joint dislocation . (3+3=6) 6. Mention the difference between ridge extension and ridge augmentation procedure ba...

# Moth eaten appearance is seen in all except: A. Osteomyelitis B. Hemorrhagic cyst C. OKC D. Osteosarcoma The correct answer is C. OKC 'Moth eaten appearance' is seen in lesions of bone which shows lytic activity.  Seen in: - Osteomyelitis - Acute suppurative and chronic both - Osteosarcoma - Osteoradionecrosis - Ewing Sarcoma - Langerhans cell histiocytosis - Hemorrhagic cyst

# A radiolucency seen between the maxillary central incisors is most commonly due to: A. Periapical cyst B. Nasopalatine cyst C. Globulomaxillary cyst D. Nasoalveolar cyst The correct answer is B. Nasopalatine cyst Nasopalatine cyst (Incisive canal cyst) - Most common fissural cyst, usually asymptomatic, may complain of tender swelling of palate. Radiographic characteristics- well demarcated round, oval or heart shaped radiolucency between and above maxillary central incisors; rarely just lateral to the midline; lesion crosses midline, teeth are vital. 

# The dentin desensitizing agents that acts by precipitating proteins in dentinal tubular fluid is: (MHCET 2014) A. Strontium chloride B. Potassium oxalate C. Fluoride D. Hydroxyethyl methacrylate The correct answer is A. Strontium chloride. After professional diagnosis, dentinal hypersensitivity can be treated simply and inexpensively by home use of desensitizing dentifrices. Strontium Chloride Dentifrices Ten percent strontium chloride desensitizing dentifrices are found effective in relieving the pain of tooth hypersensitivity. Potassium Nitrate Dentifrices Five percent potassium nitrate dentifrices are found to alleviate pain related to tooth hypersensitivity. Fluoride Dentifrices Sodium monofluorophosphates dentifrices are effective mode of treating tooth hypersensitivity. Strontium chloride is the most important constituent in home care dentifrices intended to be used for the treatment of dentinal hypersensitivity. Topical applicatio...