new-attachment of periodontium

例句：

1. 1.The periodontium is the connective tissue that supports the teeth and gums.
   牙周膜是支持牙齿和牙龈的连接组织。
2. 2. Periodontium disease is a condition that affects the tissues surrounding the teeth.
   牙周病是一种影响牙齿周围组织的病症。
3. 3. Researchers are studying the effects of periodontium on overall health.
   研究人员正在研究牙周膜对整体健康的影响。