The Ness Visual Dictionary of Dental Technology
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| Term | labial sulcus |
| Pronunciation | LAY-bee-ul SUL-kus |
| Variations | labial vestibule |
| See also | labial, sulcus, buccal sulcus |
| Definition | The depression between the lips and the alveolar process of either arch, bordered by the buccal frenae and divided at the labial frenum. |
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labial sulcus
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