3151. The pain transmission through dentin is______________?
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A. Direct neural stimulation

B. All of the above

C. Transduction theory

D. Fluid or hydrodynamic theory

3152. The fibroblasts associated with capillaries are__________?
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A. Pericytes

B. Plasma cell

C. Histocytes

D. Lymphocytes

3153. The intimal B cells of synovical memrbane of temporomandibular joint are_______________?
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A. Macrophage like

B. Lmphocyte like

C. Plasma cell like

D. Fibroblast like
3154. All of the following are true about functions of dental pulp except______________?
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A. Nerve supply to dentin

B. Formation of dentin

C. Nerve supply to enamel through fibres

D. Sends impulses to CNS

3155. The duct(s) of gland(s) opening into the floor of the mouth is (are)_______________?
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A. Von Ebner

B. Submandibular and sublingual

C. submandibular and parotid

D. Sublingual and parotid

3156. The rest of malassez in the periodontal ligament are derived from_____________?
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A. Lamina propria

B. Odontogenic epithelium

C. Dental pulp

D. Vestibular lamina

3157. The hertwigs epithelial root shealth is essential to development of the root because it_______________?
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A. Given rise to odontoblasts that lay down dentin of the root

B. Gives rise to cementoblasts that produce cementum of the root

C. Moulds the shape of roots and stimulates differentiation of odontoblasts

D. Remians as an essential constituents of the periodontal ligament

3158. Width of PDL is_______________?
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A. 0.50 mm

B. 0.75 mm

C. 0.25 mm

D. 0.10 mm

3159. The odontoblasts killed during cavity preparation are derived from_____________?
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A. Unaffected odontoblasts from the pulp

B. Osteoblasts

C. Histocytes

D. Undifferentiated cells
3160. Which of the following structures is not found in a living pulp ?
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A. Non-myelinated nerve fibres

B. Collagen fibres

C. Haversian fibres

D. Reticulum

3161. The shallow furrows on the enamel surface, where stria of Retzius end are known as _______________ ?
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A. perikymata

B. Enamel lamellae

C. Pellicle

D. Cracks

3162. Dentinal tubules are______________?
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A. Concave

B. Straight

C. S0shaped

D. None of the above

3163. Second arch derivatives are all except_________________?
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A. Styloid process

B. Malleus and incus

C. Stapes

D. Superior part of hyoid bone

3164. Cellular cementum is____________?
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A. First formed cementum

B. Less irregular

C. More calcified than acellular type

D. Less calcified than acellular type
3165. Pulp responds to all stimuli by pain because it has only_______________?
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A. Free nerve endings

B. Ruffini corpuscle

C. Krause end bulbs

D. Pacinian corpuscle

3166. Bundle bone is part of____________?
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A. Cementum

B. Periodontal ligament

C. Longbones

D. Alveolar bone
3167. Enamel is laid down______________?
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A. Mainly by ameloblasts

B. Mainly by odontoblasts

C. Only on odontoblasts

D. Only by ameloblasts
3168. Aging process affects pulp tissue by_____________?
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A. Decreasing the size and shape of pulp tissue and cellular component

B. Increases vascularity of the pulp

C. Decrease the calcific component of the pulp

D. Increase cellular component at the expenses of fibre component

3169. The total volumes of all permanent pulp organ______________?
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A. 3.8 cc

B. 0.38 cc

C. 0.58 cc

D. 0.02 cc

3170. S shape of dentinal tubules is due to______________?
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A. Peritubular dentin

B. Due to excess amount of organic component

C. Incremental deposition

D. Crowding of odontoblasts
3171. Disturbance during the morphodifferentition stage of tooth development will result in______________?
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A. Change in number of teeth

B. Change in form and shape of the teeth

C. Ameloblastoma

D. Hypoplasia

3172. Enamel pearls are found in_____________?
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A. None of the above

B. Occlusal surface of premolars

C. Furcation areas of permanent molars

D. On the incisal edges of incisors

3173. Periodontal fibres joining cemental surface of one tooth, to cemental surface of adjacent tooth are called____________?
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A. Gingivodental

B. Transseptal fibres

C. Cemental fibres

D. Horizontal fibres

3174. The bud, cap and bell stage of the developing tooth are based, on growth of the______________?
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A. Dental sac

B. Stellate reticulum

C. Enamel organ

D. Dental papilla

3175. Basal bone is____________?
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A. That part of the bone embracing apices of root of teeth

B. Lower border of the mandible

C. That part of the bone containing teeth

D. Ramus of the mandible

3176. At the cemento enamel junction, which of the following occurs_____________?
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A. Cementum does not meet enamel

B. Cementum meets enamel

C. All of the above

D. Cementum overlaps enamel

3177. The cells that form secondary dentin are_______________?
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A. Fibroblasts

B. Cementoblasts

C. Odontoblasts

D. Osteoblasts

3178. The average width of enamel rods is______________?
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A. 2mm

B. 5mm

C. 0.5mm

D. 10mm

3179. The radicular pulp is continous with tissues of the periapical area via the____________?
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A. Pulp chamber

B. Mental foramen

C. Apical foramen

D. Pulp canal

3180. Intermediate plexus is absent in which of the following principle fibres_____________?
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A. Gingival

B. Horizontal

C. Transseptal

D. Oblique

3181. If cementum is not formed______________?
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A. Delayed eruption

B. Exforliation of teeth occur

C. Ankylosis may occur

D. No change occurs

3182. The cells of the enamel organ which differentiate into future ameloblasts are_____________?
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A. Cells of inner enamel epithelium

B. Cells of outer enamel epithelium

C. Cells of stratum intermedium

D. Cells of stellate reticulum

3183. Histologically the dental pulp most closely resembles______________?
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A. Vascular tissue

B. Granulation tissue

C. Loose connective tissue

D. Nerve tissue

3184. Main function of salivary duct is_______________?
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A. Antibacterial action by secreting lysoenzymes and lactoferrin

B. None of the above

C. To convey the saliva secreted by the terminal secretory units to oral cavity

D. Synthesis of secretory glycoproteins by Kallidrein an enzyme in striated duct cells

3185. The muscle which is commonly involved in myofacial pain dysfunction syndrome______________?
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A. Medial pterygoid

B. Lateral ptergoid

C. Temporalis

D. Massetor

3186. Collagen biosynthesis occurs inside the______________?
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A. Odontoblasts

B. Fibroblasts

C. Osteoblasts

D. Chondroblasts

3187. Nutrition for ameloblasts after 1st layer of enamel is laid is______________?
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A. Odontoblastic process

B. Ree

C. Dental sac

D. Dental Papilla

3188. Fluid flow, in or out of the dentinal tubules is proportional to the tuble diameter by______________?
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A. Fourth power of the diameter

B. Square of the diameter

C. Sixth power of the diameter

D. Third power of the diameter

3189. The tooth present close to maxillary sinus is_________________?
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A. 1st premolar

B. 2nd premolar

C. 1st molar

D. 2nd molar

3190. Hertwigs epithelial root sheath is made up of_______________?
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A. Outer and inner enamel epithelium

B. Stratum intermedium

C. Stellate reticulum

D. Hyaline layer of Hopewell-smill

3191. The calcified mass found in the PDL are_____________?
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A. Osteoclasts

B. Cementoclasts

C. Cementicles

D. Osteoblasts

3192. The development of pulp begins__________?
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A. 10th week of IU

B. 18th week of IU

C. 8th week of IU

D. 6th week of IU

3193. Lip furrow band is______________?
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A. Vestibular lamina

B. Basal lamina

C. Dental lamina

D. Successional lamina

3194. Dystrophic calcifiaction is seen most commonly in which of the following oral tissues__________?
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A. Pulp

B. Dentin

C. Enamel

D. Periodontal ligament

3195. Physically and chemically, the dentin is closely related to______________?
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A. Enamel

B. None of the above

C. Bone

D. Acellular cementum

3196. Odontoblasts are derived from______________?
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A. Lymphocytes

B. Undifferentiated mesenchymal

C. Macrophages

D. Histocytes

3197. Sharpeys fibres are present in_______________?
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A. Periodontal ligament

B. Bone

C. All of the above

D. Periosteum

3198. Intermediate cementum is___________?
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A. Found at dentinocemental junction

B. Coronal third

C. Apical third

D. Between enamel and cementum

3199. Acellular cementum is typically found in_____________?
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A. Apical half of root

B. Coronal half of root

C. Apex of root

D. Entire root

3200. Outer and inner enamel epithelium first seen in____________?
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A. Cap stage

B. Bud stage

C. Bell stage

D. Advanced bell stage