Developmental Disturbances Of Lip And Palate

Question 1

What are the developmental disturbances of lip and palate? 5

Answer 1

1. Congenital lip and commissural pits and fistula
2. van der Woude syndrome
3. Cleft lip and cleft palate
4. Cheilitis glandularis
5. Cheilitis Granulomatosa

Question 2

……% of all cases of congenital labial fistula, there is an associated …..

Answer 2

75-80

Cleft lip or cleft palate

Question 3

Commisural pits follow what Mendelian character

Answer 3

Dominant character

Question 4

What is congenital lip pits and fistula?

Answer 4

They are malformations of the lips, often following a hereditary pattern, that may occur alone or in association with other developmental anomalies such as various oral cleft.

Question 5

Etioogy of congenital lip pits?

Answer 5

1. Many theories of the etiology have been offered, but none has universallly accepted.
2. It may be result from the notching of the lip in early stage of development with
   - fixation of the tissue at the base of the notch
   - from failure of complete union of the embryonic lateral sulci of the lip

Question 6

Etiology of commisural pits

Answer 6

They occur at the site of the horizontal facial cleft and may represent defective development of this embryonic fissure.