Tessier classification

https://doi.org/10.1351/goldbook.11293

Classification of bony and soft tissue facial clefts based on their anatomic location.

Note: They are numbered from \(\pu{0\!{-}\! 14}\), with \(\pu{0}\) and \(\pu{14}\) being in the midline.
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 812 [Terms] [Paper]