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root canal /ˈɹuːm ˈeə kəndˈɪʃənə ˈtuː/ n

中文：牙根管

中文 · 牙根管Español · conducto radicularFrançais · canal radiculaire
Meaning：Extension of the pulp chamber containing the dental pulp and opening at the apex of the root.
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Molar cross-section

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