Cleft Lip/Palate Flashcards
Cleft lip is more common in what gender?
Boys
Isolated cleft palate is more common in what gender?
Girls
What side is it more common to see a cleft?
Left
What fraction of clefts are unilateral?
3/4
Embryologically, this moves down so that the palatine shelves can come together horizontally.
Tongue
Failure of the tongue to descend can cause this.
Cleft palate.
A second child with a cleft parent has what % chance of having a cleft?
15
Familial role of cleft palate in what percent of cases?
20-30%
Most common environmental cause of cleft palate.
Alcohol use while pregnant.
Most clefts are secondary to what?
Environmental exposure, and NOT because of genetics.
An environmental exposure at or before this period causes clefts.
6 weeks
Environmental causes of clefts.
- Drugs (corticosteroids and alcohol)
- Nutritional deficiencies
- Radiation
- Hypoxia
- Viral infection
Cleft babies often grow to have scarring on the maxilla, which causes this Angle malocclusion.
Type 3
Dental problems associated with clefts.
- Congenitally missing lateral or cuspid.
- Supernumerary teeth.
- Morphogenic dental problems.
Ear problems develop in cleft patients bc of this.
- Levator and tensor veli palatini muscles don’t form properly.
