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Teeth have two parts: the crown and the root. The crown is the visible portion of a tooth within the mouth. The root is completely under the surface of the gums until it meets the crown. This crown-root meeting point is the cementoenamel junction (CEJ), also known as the cervical margin.

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Teeth and Supporting Structures

  • 章节

  • 发表日期：

    2026年

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  • Jacob Bray,
  • Dileep Sharma

摘要

Teeth have two parts: the crown and the root. The crown is the visible portion of a tooth within the mouth. The root is completely under the surface of the gums until it meets the crown. This crown-root meeting point is the cementoenamel junction (CEJ), also known as the cervical margin.