The specialized tissues within a tooth, including the pulp, dentin, and the various tissues surrounding the root.
From Greek 'endo-' (within) and 'odont-' (tooth), with the Latin neuter singular suffix '-um,' similar to how 'dentium' refers to dental tissues collectively.
The endodontium contains blood vessels and nerves so sensitive that even a tiny pressure change can cause pain—this is why your dentist numbs the area before drilling!
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