This produces poor alignment, with the maxillary segments collapsing mesio-palataly, behind the premaxilla, which may be particularly severe in the bilateral cleft.
Palatal shelves grow out from the inner aspect of the maxillary processes.
In the position of the future hard palate, two outgrowths occur from the maxillary swellings, known as the palatine shelves.
The mandible is proximally as broad as the apex of the first segment of the maxillary palpus.
The maxillary formation, which determines the width of the face, is a derivative of neural crest cells which are ectodermal in origin.
In weeks 6 and 7 the maxillary swellings grow medially, push the medial nasal swellings together, to fuse in the midline.
An anterior and a posterior point of articulation for the mandibles are present and are highly sclerotized, as is the maxillary strut.
The maxillary processes develop as cephalic outgrowths from the mandibular process or first branchial arch.
