(Chapter 15) Footnote 68:

Vesalius cites the Hippocratic De Articulis in the margin. This was almost certainly a guess, and a wrong one. Though this treatise (which is much more therapeutic than anatomical) states that a knowledge of the spine’s structure is “a requisite for many diseases,”(45) its description of spinal anatomy is perfunctory. The modern Hippocratic corpus refers to the second vertebra as o( o)dou/j kaleo/menoj “the so-called tooth” only in De morbis popularibus 2.2.24.4-6.