Middle deft upper lip due to failure of fusion b/w
Defect
Caused by


Cleft upper lip
Failure of fusion between maxillary process and medial naral process


Medial deft upper lip
Failure of fusion between maxillay process and medial and lateral naral process


Oblique facial deft
Failure of fusion between maxillary process and medial lateral naral process


Lower lip deft
Failure of fusion of two mandibular process
Maxillary process
Medial naral process
Medial and lateral naral process
Medial naral process and maxillary process