Without examining the question further it was probably most prominant among members of the royal and daimyo families primarily descended from the Yakuts invasion in the 6th and 7th centuries. Anything that can suggest you are part of a former or current ruling class is always considered GOOD ~ a veritable beauty spot.
A Swedish study showed 18% of Sa'ami having some dental dysplasia ~ just about the highest level in any group on Earth.
Fascinating.
For real. I’d noticed it, and never realized what I was looking at.
Thanks.
Neanderthal tooth quantity/size in a Modern Human skull/mouth?