"Tooth cannot be poked"
In this dictionary:
choko.a kt [ele] poke, pick at, prod at: ~ meno clean teeth with a toothpick; ~ pweza poke out a cuttle-fish from rocks. (tde) chokolea, (tdew) chokolewa; (tdk) chokoka; (tdn) chokoana; (tds) chokosha. mchokoo nm.
So "picked" would be a better choice, probably.