normal facial development

Question 1

in what 2 ways is bone laid down?

Answer 1

1) cartilage-endochondreal

2) membrane-intramembranous

Question 2

calvarium is also known as what?

Answer 2

the skull

Question 3

how many fontanelles are there at birth?

Answer 3

6

Question 4

what do fontanelles allow for?

Answer 4

compression of the head during birth

Question 5

what way is bone laid down in the cranial base?

Answer 5

endochondreal ossification

Question 6

what does the nasomaxillary complex include?

Answer 6

• maxilla
• nasal septum
• zygomatic bones

Question 7

in a female, when is facial growth usually completed by?

Answer 7

16-17 yrs

Question 8

in a male, when is facial growth usually completed by?

Answer 8

17-19 yrs

Question 9

can the mandible sometimes have a late growth spur?

Answer 9

yes, in early 20s

Question 10

when does the deciduous dentition start to erupt?

Answer 10

6 months

Question 11

when is the deciduous denttion complete by?

Answer 11

usually around 3 years

Question 12

when is root formation of deciduos teeth complete by?

Answer 12

18 months after eruption

Question 13

when do deciduous teeth start to exfoliate?

Answer 13

6 years old

Question 14

when is root formation complete on pernament teeth?

Answer 14

around 3 years after eruption

Question 15

what is leeway space?

Answer 15

when the difference between the buccal deciduous teeth is wider than pernament successorse

Question 16

when do the teeth erupt until?

Answer 16

until they occlude with eachother

Question 17

why is lower incisor crowding common in late teens, early 20’s?

Answer 17

• initiakky thought it was related to eruption of the 8’s , but this is not true.
• it s due to the late growth of the mandible and general mesial migration of all teeth