teeth and salivary

Question 1

embryonic origin of submandibular gland

Answer 1

endoderm

Question 2

embryonic origin of parotid gland

Answer 2

ectoderm

Question 3

embryonic origin of sublingual gland

Answer 3

endoderm

Question 4

submandibular innerv

Answer 4

facial n

Question 5

sublingual gland innerv

Answer 5

facial n

Question 6

parotid gland innerv

Answer 6

glossopharyngeal n

Question 7

in what order do salivary glands develop?

Answer 7

1. parotid
2. submandibular
3. sublingual

Question 8

where does the first tooth bud develop?

Answer 8

ant mandibular region

Question 9

embryonic origin of teeth? (three)

Answer 9

ectoderm, NC, mesoderm (very small amount)

Question 10

dental lamina is a ________ , which will go on to develop into_______

Answer 10

thickening in ectoderm

tooth buds for 20 deciduous teeth

Question 11

__________ teeth have well-developed crowns at birth, whereas _________ remain buds

Answer 11

deciduous (baby teeth)

permanent teeth

Question 12

when is bud stage? cap stage? bell stage?

Answer 12

8 week, 10 weeks, 3 months

Question 13

how does cap stage form?

Answer 13

ectoderm oral epith invaginated down into underlying neural crest mesenchyme

Question 14

what interaction induces tooth development?

Answer 14

oral epith ectoderm and neural crest mesenchymal interaction

Question 15

dental sac is of what origin and gives rise to what?

Answer 15

NC mesenchymal origin, gives rise to cementum and periodontal ligament

Question 16

enamel organ is of what origin and gives rise to what?

Answer 16

ectodermal origin and gives rise to ameloblasts, which produce enamel

Question 17

dental papilla. origin and gives rise to?

Answer 17

NC mesenchyme

gives rise to odontoblasts–> dentin and dental pulp

Question 18

fate of ameloblasts?

Answer 18

degenerate after tooth erupts, no more enamel production

Question 19

fate of odontoblasts?

Answer 19

they retreat back to the dental papilla and produce dentin for your whole life

Question 20

Permanent tooth buds develop when? and grow on the ________ side of your deciduous teeth

Answer 20

3rd month, lingual

Question 21

What clinical correlation symptoms are: extra teeth, typically in the area of maxillary incisors, posterior to normal incisors, erupt between deciduous and permanent teeth, and are the most common cause for un-erupted permanent incisors?

Answer 21

supernumary teeth

Question 22

What causes mulberry molars, hutchinson incisors (screwdriver incisors) on permanent teeth by disrupting the ameloblasts post-birth?

Answer 22

cogenital syphillis

Question 23

Where are enamel pearls and what are they caused by?

Answer 23

on root of the tooth (enamel doesn’t normally grow there), formed by aberrant groups of ameloblasts

Question 24

What is the formation pattern of enamel?

Answer 24

amelopblasts form enamel starting at the cusp and working down toward the future root.

Question 25

What influences enamel formation?

Answer 25

odontoblasts influence the inner enamel epithelium of the enamel organ to differentiate into ameloblasts because enamel cannot form until a sufficient layer of dentin is formed.