normal facial development Flashcards
in what 2 ways is bone laid down?
1) cartilage-endochondreal
2) membrane-intramembranous
calvarium is also known as what?
the skull
how many fontanelles are there at birth?
6
what do fontanelles allow for?
compression of the head during birth
what way is bone laid down in the cranial base?
endochondreal ossification
what does the nasomaxillary complex include?
- maxilla
- nasal septum
- zygomatic bones
in a female, when is facial growth usually completed by?
16-17 yrs
in a male, when is facial growth usually completed by?
17-19 yrs
can the mandible sometimes have a late growth spur?
yes, in early 20s
when does the deciduous dentition start to erupt?
6 months
when is the deciduous denttion complete by?
usually around 3 years
when is root formation of deciduos teeth complete by?
18 months after eruption
when do deciduous teeth start to exfoliate?
6 years old
when is root formation complete on pernament teeth?
around 3 years after eruption
what is leeway space?
when the difference between the buccal deciduous teeth is wider than pernament successorse
when do the teeth erupt until?
until they occlude with eachother
why is lower incisor crowding common in late teens, early 20’s?
- 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
