Unicode's Miscellaneous Technical block encodes a bunch of dentistry symbols:
⎾⎿⏀⏁⏂⏃⏄⏅⏆⏇⏈⏉⏊⏋⏌
It looks like the first and last two are used in Palmer notation. What are the rest of them used for? What do the circle, triangle, and tilde mean?
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Sign up to join this communityUnicode's Miscellaneous Technical block encodes a bunch of dentistry symbols:
⎾⎿⏀⏁⏂⏃⏄⏅⏆⏇⏈⏉⏊⏋⏌
It looks like the first and last two are used in Palmer notation. What are the rest of them used for? What do the circle, triangle, and tilde mean?
According to Dental Computing and Applications, in Chapter XVII on Unicode Characters for Human Dentition,
A triangle with a bar indicates an artificial spacer, especially on a denture, a circle with a bar indicates a supernumerary tooth, and a tilde with a bar indicates an abbreviation for a group of teeth.
It also says that this is notation used by the dental insurance claim system in Japan.