B. Enamel hypoplasia

C. Amelogenisis imperfecta

D. Dentinogenesis imperfecta

A. Canals of Hirchfeld and Zuckerland

B. Herversian canals

C. Volkmann canals

A. 1 year

B. 3 years

D. 2 years

A. 4.8

C. 2.3

D. 3.8

A. Histocytes

C. Osteoblasts

D. Unaffected odontoblasts from the pulp

B. Pulp & Periodontal ligament

C. All of the above

D. Pulp only

A. 100 ? m

B. 50 ? m

D. 75 ? m

A. Differentiation

C. Apposition

D. Calcification

B. Cementoclasts

C. Osteoclasts

D. Osteoblasts

B. 2mm

C. 10mm

D. 0.5mm

A. Same as in other parts of alveolar bone

B. Less than the cementum

C. Less than the other parts of alveolar bone

A. Enamel spindle

B. Enamel tuft

D. Enamel lamella

A. In thymus

B. In gallbladder

C. Along with heparin on surface of mast cells

B. Increased fibrotic component

C. Calcification in blood vessels near apical foramen

D. Decreased cellular component

B. There is no transmission of stimulus across dentin

C. Direct activation of nerve endings

D. Correlated with the innervation density of the dentin

A. Down growths of gingival epithelium

B. Reversal of function of horizontal and oblique fibres

C. Gingival cysts formed from cell rests

A. More than that of enamel

B. More than bone

D. Equal to that of bone

B. Requires matrix vesicle for mineralization

C. Collagen fibers are oriented perpendicular to DEJ

D. Vonkorff fibers are present

B. Hunter schreger bands

C. Enamel tufts

D. Enamel lamellae

A. Cellular cementum

B. Acellular cementum

D. Incremental line

A. 76%

B. 86%

D. 66%

A. Outer enamel epithelium

B. Stratum inter medium

C. Stellate reticulum

A. Ameloplakin

C. Enamelin

D. Tuftelin

B. Cells of stratum intermedium

C. Cells of stellate reticulum

D. Cells of outer enamel epithelium

B. Mesoderm

C. Ectoderm

D. Ectoderm and endoderm

B. Peritubular dentin

C. Secondary dentin

D. Inter tubular dentin

B. 0.75 mm

C. 0.10 mm

D. 0.50 mm

A. It has no direct connection with the active cells of the dental pulp

C. It is essentially a keratin tissue and has no blood vessels

D. It has only a small percent of organic content

A. Apical third

B. Coronal third

D. Between enamel and cementum

A. Dentin of permanent mandibular incisors

C. Enamel and dentin of permanent first molars

D. Enamel of primary incisors

A. Lymphocytes

B. Histocytes

C. Macrophages

A. Adherent epithelial rests

C. Defects in cementogenesis

D. Dividing epithelial bridges

A. All of the above

C. Primary and secondary dentin

D. Secondary dentin and circumpulpal dentin

A. Respond to hot and cold

B. Sensory in nature

C. carry pain sensation

A. Odontoblastic process

C. Ree

D. Dental Papilla

A. Prevent rotation

C. Prevent extrusion

D. All of the above

A. Lymphocytes

C. Histocytes

D. Plasma cell

B. Apical third

C. Cervical third

D. It has uniform width

A. Occlusal surface of premolars

B. On the incisal edges of incisors

C. None of the above

A. Increases with age

B. Increased in some cases and decreases in some cases

D. None of the above

A. Transeptal

B. Horizontal

C. Apical

A. Remians as an essential constituents of the periodontal ligament

B. Given rise to odontoblasts that lay down dentin of the root

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

A. Advanced bell stage

B. Bud stage

C. Bell stage

B. Enamel forms faster than dentin

C. Enamel forms more cervically than dentin

D. Processes of their cells remain in content with each other

A. Does not contain collagen fibres

C. Is derived from the sheath of hertwig

D. Is acellular in the apical third of the tooth

A. Change in number of teeth

B. Ameloblastoma

D. Hypoplasia

A. As lines in the enamel running at right angles to the enamel surface

B. As lines in the dentin running at right angles to the dentino-enamel junction

C. In dentin and follow the appositional pattern

A. The apical foramen is surrounded by cementum

B. Cementum is thinnest at CEJ (20-50?m)

C. Cementum is thickest towards the apex (150-200?m)

B. Tomes layer

C. Odontoblastic processes

D. Tomes processes

A. Enamel

B. Bone

D. Cementum