tepeizquixochitl.

"the bark of this tree, ground and placed on the gums, relieves pain and burning sensation, comforts and strengthens the teeth" (Central Mexico, 1571–1615)
The Mexican Treasury: The Writings of Dr. Francisco Hernández, ed. Simon Varey, transl. Rafael Chabrán, Cynthia L. Chamberlin, and Simon Varey (Stanford: Stanford University Press, 2000), 127.