お歯黒[ohaguro] tooth blackening
臼歯[kyuushi] molar
永久歯[eikyuushi] permanent tooth
奥歯[okuba] molars
下歯[shitaba] lower teeth

仮歯[kashi] false tooth
加工歯[kakoushi] dental bridge
義歯[gishi] artificial tooth
鋸歯[kyoshi] teeth of a saw
金歯[kinba] gold tooth

隔靴掻痒[kakkasouyou] being frustrated because something is not quite as hoped (just as one cannot scratch an itch from outside a shoe)
歯痒い[hagayui] impatient
瘙痒[souyou] itch
痛痒[tsuuyou] pain and itching
痒い[kayui] itchy

痛し痒し[itashikayushi] delicate or ticklish situation
痒み[kayumi] itch
麻姑掻痒[makosouyou] things happening exactly as one pleases (wishes)
痒がる[kayugaru] to complain of itching
むず痒い[muzugayui] itchy