noun
pulp cavity
Dental term referring to the hollow space inside a tooth that contains the dental pulp.
歯髄腔が感染すると、激しい痛みを感じることがあります。
When the pulp cavity becomes infected, you may feel severe pain.
Compound of 歯髄 (dental pulp) and 腔 (cavity). The reading しずいこう is standard; しずいくう is a less common alternative reading.