[速览]5 ．Pulpitis牙 髓 炎

Doctor：Sit in the chair please ． Lean your head back against the chair now ． What ’ s the trouble？病人：我牙痛得厉害。医生：哪个牙痛呢？Doctor：Please open your mouth and let me examine your teeth ． One of your back teeth has a big cavity ． We ’ ll take an X‐ray picturefirst ......