Book One -- The things that sustain and support the entire body, and what braces and attaches them all. [the bones and the ligaments that interconnect them] | Chapter 9 On the Twelve Bones of the Upper Maxilla, Including the Bones of the Nose

Structural system of the maxillary bones.

The bones of the upper maxilla are connected to each other by sutures, but in such a way that joints which are effected by harmonia [sutura plana] may also be called sutures. Even Galen agrees that no one should hesitate to call them all sutures, 28 since the most exact harmoniae (if such things exist) display a certain entrance of one bone into another, like that of sutures. The order of sutures in the upper maxilla and the number of its bones is, I believe, much easier to demonstrate than to explain in writing. 29 In spite of the difficulty of this subject, I shall first deal with the upper maxilla in man, and add in passing items in Galen’s description that apply to dogs and monkeys but not to humans. Whatever bones of the skull have not yet been explained will be termed the upper maxilla, with the exception of the upper row of teeth. We have already counted eight bones of the head, surrounded by their own sutures, in addition to four ossicles 30 which enter into the structure of the instruments of hearing.



Book One -- The things that sustain and support the entire body, and what braces and attaches them all. [the bones and the ligaments that interconnect them] | Chapter 9 On the Twelve Bones of the Upper Maxilla, Including the Bones of the Nose