MCQs of Oral Biology and Tooth Morphology

MCQs of Oral Biology and Tooth Morphology.

1: Disturbance of saliva production from the parotid gland is likely to result from damage to which of the following ganglia?
a) Gasserian
b) Geniculate
c) Otic
d) Pterygopalatine
e) Trigeminal
Key: c

2: A 20 year old man falls down and chips the incisal edge of his maxillary central incisor, reducing the length of the crown. A dentist informs him that the tooth may erupt a little to compensate for the loss. This tooth movement is likely to result in increase in size of which of the following dental tissues?
a) Cementum
b) Dentin
c) Enamel
d) Periodontal ligament
e) Pulp
Key: a

3: A patient complains of loss of taste, and a numb sensation in the left half of his tongue, after removal of his left lower wisdom tooth. Which of the following nerves is most likely to have been injured during removal of this tooth?
a) Facial nerve
b) Glossopharyngeal nerve
c) Inferior alveolar nerve
d) Lingual nerve
e) Mandibular nerve
Key: d

4: The position of maximum inter cuspation of upper & lower teeth is referred to as
a) Centric position
b) Centric occlusion
c) Centric relation
d) Centric organization
e) Centric bite
Key: b

5: A person eats a starch rich diet. Saliva from which of the following glands is most likely to be effective in digestion of this food?
a) Glamds of von Ebner
b) Minor Salivary Glands
c) Parotid glands
d) Submandibular glands
e) Sublingual glands
Key: c

6: At the age of nine years, the mandibular permanent first molar has its distal contact with which of the following teeth?
a) First premolar
b) No distal contact
c) Second deciduous molar
d) Second permanent molar
e) Second premolar
Key: b

7: A deep carious lesion in a tooth reaches the pulp. The pulp responds by vasodilatation. There is migration of white blood cells into the pulp. This response is most likely to be initiated by cells in which of the following zones of the pulp?
a) Cell free zone
b) Cell rich zone
c) Odontoblast layer
d) Plexus of Raschow
e) Pulp core
Key: e

8: A 13 year old boy presents to his general dental practitioner with a broken upper incisor tooth of one day duration. He complains of pain in the tooth when drinking cold water. On examination the enamel of the incisal edge has been chipped off, and the underlying dentin exposed. Which of the following contents of he dentinal tubule are most likely to be responsible for the pain felt by the patient?
a) Collagen
b) Fluid
c) Nerve endings
d) Odontoblastic process
e) Proteoglycans
Key: b

9: Which of the following types of dentin is continuously produced throughout life?
a) Interglobular dentin
b) Intertubular dentin
c) Intratububr dentin
d) Mantle dentin
e) Tertiary dentin
Key: c

10: Which of the following ducts arise from secretory end pieces of salivary glands?
a) Striated ducts
b) Excretory ducts
c) Intercalated ducts
d) Interlobular ducts
e) Secretory
Key: c

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