舌系带，俗称舌筋，即孩子张开口撬起舌头时在舌和口底之间的一薄条状组织。
1)舌系带（frenulum of tongue）：舌腹部黏膜返折与舌下区的黏膜相延续在中线形成的带状 结构。当舌系带过短时，常造成吮吸、咀嚼及言语障碍，需行手术矫正治疗。
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他的舌头可以伸出口外，但不能上翘，是否是舌系带短？
His tongue can be extended extraoral, but can not bend, whether it is a short tongue tie?
最为显著的例子即连接舌头和口底、唇和牙龈的舌系带。
The most obvious example is the fraenum which attaches the tongue to the bottom of the mouth, or the lip to the gum.
结论婴儿期不宜作舌系带矫正术，合适的手术时间为2～3周岁。
Conclusions the ankylotomy were unsuitable in the babies . The suitable operation time were in the children of 2~3years old.
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