| 词汇 | periodontal-ligament |
| 释义 | periodontal ligament noun[ C ] anatomy specializeduk /per.i.əʊˌdɒn.təl ˈlɪɡ.ə.mənt/ us /per.i.oʊˌdɑːn.t̬əl ˈlɪɡ.ə.mənt/(alsoperiodontal membrane) a layer of tissue that covers a tooth's cementum(= the hard substance that covers the bottom part of a tooth inside the gum) and connects it to the jawbone: The tooth is held in location by a periodontal ligament, with the assistance of cementum. Research indicates that the periodontal ligaments play an important role in tooth eruption. Several clinical studies indicate the importance of maintaining the periodontal membrane. The tooth is bound into its socket by the strong periodontal ligament. The periodontal ligament and the apex of the tooth still contain bacteria from the original infection. The principal role of cementum is to serve as a medium by which the periodontal ligaments can attach to the tooth for stability. The teeth baby tooth buck-toothed cementum centric cingulum coronal erupt hydroxyapatite interdental labially lingually mesially milk tooth molar pulpal rictus snaggle-toothed snaggled through clenched teeth wisdom tooth |
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