quiz 1 - cleft lip & palate Flashcards
describe cleft
- abnormal opening/fissure
- congenital
- delayed migration of neural crest cells
- abnormal fusion -> anatomical parts
- sections of the lip, al ridge, oral, & nasal cav
- acquired via ablative surgery (tonsil removal)
describe the embryological dev of the lip & palate
primary plate
- lip, alveolus
- 7 wks
- starts at IF
secondary plate
- 9 wks
- palate
describe the suture lines during embryo dev
- suture lines form Y via lip, alv ridge, palate
describe how fusion takes place at the IF
- fusion begins at IF
- forward fusion -> base of nose, alv ridge, lip
- backwards fusion -> hard palate, floor of nose, velum, uvula
describe the types of cleft lip
unilateral
bilateral
- neither fused forward
describe the types of cleft palate
w/ lip
- pre maxilla exposed
- lip & palate did not fuse
cleft lip varies in ?
type, length, & width
differentiate between complete and incomplete
- lip 2 nose C
- just lip and back (in mouth) IC
OR - lip 2 all of palate C
- lip (2x), palate & uvula C
OR - just soft IC
- soft & hard C
which demographics are at risk for cleft ?
American Indian - highest, blk - lowest
define teratogen
interfering chemical agents from environment
describe a sub mucous cleft palate
- hidden
- bifid/hypoplastic uvula
- zona pellucida - blue line
v shape velum “INVERTED” - notch in hard pal
- incomplete nasal surface
- affected same as complete cleft pal
- levator velor mm attach 2 back of hard pal
overt cleft v occult cleft ?
overt -> visible from mouth
occult -> visible from nasal surface via nasoendoscapy
describe prevalence of cleft
4th most common, 1/6000
lip - male dominant
palate - female dominant
facial -> rare
what is lip repair ?
cheilorraphy
what function problems accompany sub mucous cleft ?
VP insufficiency
feeding problems
nasal regurgitation
ET malfunction
