Dentosphere : World of Dentistry

# The type of fibrous element in enamel is : A. Tonofilament B. Keratin like fiber C. Collagen fiber D. Vimentin filament # Calcification in enamel starts at : A. Enamel Matrix B. Root C. CEJ D. DEJ # Specific gravity of enamel is : A. 2.8 B. 3.8 C. 4.8 D. 2.3 # Inorganic content of enamel is about : A. 35 % B. 50 % C. 4 % D. 96 % # Length of enamel rods is : A. Greater than the thickness of the enamel B. Less then the thickness of the enamel C. Equal to the thickness of the enamel D. None of the above # The diameter of the rod is: A. 4 micrometer B. 9 micrometer C. 7 micrometer D. 2 micrometer # Which of the following statement is correct ? A. In cross sections enamel rods appear hexagonal and resemble fish scales B. The bodies of rods are near occlusal and incisal surfaces , whereas the tails point cervically C...

# Perikymata are the external surface manifestations of : A. Enamel rods B. Incremental lines of Retzius C. Nasmyth's membrane D. Pellicle # The percentage of inorganic matter in fully developed enamel is about: A. 66 % B. 76 % C. 86 % D. 96 %

# Cementum : A. Is derived from the sheath of Hertwig B. Is acellular in the apical third of the tooth C. Often overlaps the enamel D. Does not contain collagen fibers # Cellular cementum and compact bone contain : A. Sharpey's fibers and elastic fibers B. Collagen fibers and blood vessels C. Canaliculi and incremental lines D. Lacunae and elastic fibers

# During inspiration when the diaphragm contracts, the intrapleural pressure becomes: A. More negative B. Less negative C. Positive D. Equal to the intra-alveolar pressure # A decrease in the arterial pO2 is seen in: A. Decrease in hemoglobin concentration of arterial blood B. Paralysis of inspiratory muscles C. Sluggish blood flow D. High altitudes

  Click HERE to view all our MCQ Topics. # The inferior dental artery is a branch of the : A. Mandibular artery B. Maxillary artery C. Pterygomandibular plexus D. None of the above # The middle meningeal artery : 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

After a week long Problem Based Learning(PBL)  Program Conducted, a seminar was conducted dividing the various topics related to dental caries amongst six different group. Our group was allocated the topic " Restorative Materials in Dental Caries" .

# Which of the following lesions are seen in Von recklinghausen's disease of skin ? A. Hemangioma B. Ameloblastoma C. Neurofibroma D. Giant cell fibroma # In which of the following conditions pulsations or murmur may be detected ? A. Capillary hemangioma B. Osteogenic sarcoma C. Epidermoid carcinoma D. Osteoid osteoma # Hereditary hemorrhagic telangiectasia is seen commonly on : A. Lips B. Buccal mucosa C. Tongue D. Palate