Tooth Development 3

Question 1

dental follicle origin

Answer 1

ectomesenchymal

Question 2

dental follicle location

Answer 2

between enamel organ and bone

Question 3

dental follicle gives rise to which cells?

Answer 3

• Cementoblasts -> cementum
• Fibroblasts -> PDL collagen fibres
• Osteoblasts -> alveolar bone

Question 4

what are the 3 layers of dental follicle?

Answer 4

Inner investing layer -> cementoblasts

Loose connective tissue layer -> fibroblasts

Outer layer -> alveolar bone

Question 5

Difference between root dentine and crown dentine

In coronal predentine, predentine collagen fibrils are ?, more ?? and arranged ? to ??

In root predentine, odontoblasts processes ? within the ?? away from the ? whereas in the crown they ? at the site of the future ?

Coronal odontoblasts are ?, root odontoblasts are ?

Answer 5

thicker
densely packed
parallel
odontoblast process

retreat
cell bodies
basal lamina
remain
ADJ

columnar
cuboidal

Question 6

Hyaline layer of Hopewell Smith

Found between the ? and ?

Highly ?

Origin ?? -> enamel matrix proteins

Roles
- Induces ??
- Cements ? onto ?

Answer 6

dentine
cementum

mineralised

epithelial cells

odontoblast formation
cementum
tooth

Question 7

cementogenesis
Formation of ?, a calcified ??, from the ??

Answer 7

cementum
connective tissue
root sheaths

Question 8

Alveolar bone

As tooth develops ? forms around the tooth germ called ?. It is from the outer layer of ??

?? are formed from the resorption of bone for tooth eruption

Answer 8

bone
alveolus
condensed mesenchyme

gubernucular canals

Question 9

Periodontal ligament

?? located between the ? and ??, it contains specialised ?? to connect the ? to ??

?? linking collagen fibres that go all the way from the bone to cementum

Answer 9

connective tissue
cementum
alveolar bone
collagen fibres
cementum
alveolar bone

intermediate plexus

Question 10

Determination of root shape

Controlled by ?? interacting with ?

? signals ? cells, using ?, to ? inwards towards the ??

Answer 10

dental papilla
HERS

papilla
HERS cells
FGFs
proliferate
dental papilla

Question 11

Answer 11

transeptal

Question 12

Answer 12

alveolo-gingival

Question 13

Answer 13

inter-radicular

Question 14

Answer 14

oblique

Question 15

Answer 15

apical

Question 16

Answer 16

horizontal

Question 17

Answer 17

alveolar crest

Question 18

Answer 18

circumferential

Question 19

Answer 19

dentino-gingival

Question 20

Answer 20

sharpey fibres

Question 21

Answer 21

intermediate plexus

Question 22

proliferation of HERS determines root shape
controlled by dental papilla

Question 23

Question 24