| 单词 | periodontal | 
| 释义 | per·i·o·don·tal   (pĕr′ē-ə-dŏntl) adj. 1.  Surrounding or encasing a tooth: a periodontal ligament. 2.  Relating to or affecting tissue and structures surrounding and supporting the teeth. per′i·o·dontal·ly adv. | 
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