Dent. Anatmy: DEVELOPMENT & ANATOMY OF TEETH

Question 1

first stage of tooth development?

Answer 1

Differentiation of odntoblast

Question 2

DEJ is developed at what stage?

Answer 2

Bell Stage

Question 3

DEJ=?

Answer 3

1st site of enamel formation

Question 4

Dental Lamina is formed around ?

Answer 4

6 weeks

Question 5

Dental Lamina proliferates into bud at week?

Answer 5

at week 8

Question 6

What comes from the dental follicle?

Answer 6

Cementoblast, osteoblast (AV bone), fibroblast (PBL)

Question 7

All of the following come from dental sac except?

Answer 7

epithelial attachment comes from reduced enamel epithelium/enamel organ)

Question 8

Stratum intermedium is needed for?

Answer 8

Enamel formation

Question 9

Which cells are not found in the pulp?

Answer 9

Cementoblasts (Found in PDL)

Question 10

Lines of Owen resemble

Answer 10

Striae of Retzius (enamel)

Question 11

Difference between Contour lines of Owen & Striae of Retzius

Answer 11

Contour lines of Owen: incremental lines in dentin

Striae of Retzius: incremental lines in ENAMEL

Question 12

What are affected in lines of Owen?

Answer 12

odontoblasts

Question 13

Secretion of ameloblasts is dependent on?

Answer 13

Laying down of predentin

Question 14

Crack that goes from the enamel to the DEJ?

Answer 14

Enamel Lamellae

Question 15

Describe Enamel Lamellae

Answer 15

defects in the enamel resembling cracks or fractures which transverse the entire length of the crown from the surface to the DEJ. Hyocalcified can contain oral debris

Question 16

What is dentin called when a patient has chronic disruption by bacteria?

Answer 16

Reparative dentin

Question 17

Secondary Dentin contains ?

Answer 17

no cells

Question 18

Rashkov’s plexus are located where?

Answer 18

odontoblastic process

Question 19

Fibers concentrated in plexus underneath odontoblast, monitors what?

Answer 19

monitors painful sensations

Question 20

Describe Granular Layer of Tomes:

Answer 20

Thin Dentin Layer adjacent to cementum, granules are transverse section of coiled dentinal tubules

Question 21

Peritubular dentin is more ____________ than intertubular dentin

Answer 21

more calcified than intertubular dentin

Question 22

Difference between

Primary cementum & Secondary cementum

Answer 22

Primary cementum: acellular

Secondary Cementum: cellular

Question 23

Which of the PDL fibers is most abundant & most load bearing?

Answer 23

Oblique

Question 24

What type of collagen is predominates in PDL fibers & not in bone or dentin?

Answer 24

Type III

Question 25

Bit hard on a popcorn kernel, what stops the biting?

Answer 25

Periodontal Mechanoreceptors