I have not found any research proving an association between cleft lip and/or palate and developmentally deficient teeth.
My observation is that my oldest son (now 10 years old) who was born with a Pierre Robin Sequence (PRS)--a condition manifested through cleft palate, underdeveloped lower mandible (submaxilla), and a regular or larger tongue--makes a lot more frequent visits to the dentist's than my other three.
We also had to remove his front teeth replacing them with caps at his third year of age. It was a matter that did not seem to be directly related to his condition since the corrective surgeries were concluded with resounding success when he was less than one month old (early intervention).
Though his dental surgeon did not conclude to any form of relationship to his condition, he did not rule out the possibility of developmental causes.
Every condition is different of course, but I am almost convinced that my son's increased frequency of visits to the dentist is related to his condition.
Regards,
Gregory (father
10 yoB born with PRS)