510-10

Question 0

ectomesenchyme

Answer 0

neural crest cells that condense and direct primary epithelial band thickening

Question 1

Primary Epithelial Band

Answer 1

thickened epithelium on mandibular and maxillary processes

Question 2

2 models of tooth type differentiation

Answer 2

1. ) field model- different gradients of genes

2. ) clone model- one tooth directs development of adjacent tooth

Question 3

vestibular lamina

Answer 3

will develop into space between the teeth and cheek

Question 4

dental lamina

Answer 4

ingrowth of primary epithelial band that will become tooth

Question 5

bud

Answer 5

invaginated epithelia thickens to form a bud

Question 6

dental papillae

Answer 6

condensed ectomesenchyme cells that will become dentin and pulp

Question 7

cap stage

Answer 7

enamel organ has 3 layers: inner enamel epithelium, stellate reticulum, and outer enamel epithelium

Question 8

stellate reticulum

Answer 8

cells that draw water into the enamel organ

Question 9

enamel knot

Answer 9

non dividing cells that appear during cap stage and will organize the cusp development

Question 10

bell stage

Answer 10

dental lamina begins to degenerate and outer enamel epithelia looks like a bell

Question 11

cervical loop

Answer 11

region where IEE and OEE fuse together at cervical end of tooth

Question 12

enamel chord

Answer 12

forms during bell stage and corresponds to the cusps of molars

Question 13

enamel pearls

Answer 13

dental lamina that isn’t degenerated and forms enamel balls

Question 14

apposition stage

Answer 14

characterized by the production of enamel and dentin

1. ) amyloblasts differentiate first
2. ) odontoblasts differentiate and produce predentin
3. ) enamel is produced

Question 15

Hertwig’s Epithelial Root Sheath

Answer 15

apical region of developing tooth where IEE and OEE fuse (gives rise to odontoblasts and cementoblasts)

Question 16

succedaneous lamna

Answer 16

permanent tooth

Question 17

3 stages of amelogenesis

Answer 17

1. ) presecretory
2. ) secretory
3. ) maturation

Question 18

proteins produced by ameloblast

Answer 18

1. ) amelogenins- orient rods
2. ) non amelogenins- not present in mature structure
   - enamelins- elongation of apatite crystals
   - ameloblastin- sticking of ameloblasts to enamel

Question 19

tome’s process

Answer 19

part of ameloblast where enamel is secreted

Question 20

perikymata

Answer 20

shallow furrows in the enamel that corresponds to the striae of retzius

Question 21

von korff’s fibers

Answer 21

collagen fibers associated with predentin

Question 22

epithelial rests of malassez

Answer 22

part of HERS function is not well known