Rest vertical dimension is the lower face height measured from chin point to nasospinale, with the mandible in rest position.

垂直距离的概念可以是指下颌于时这两个标志点之的距离，主要与肌功有。

The length of the face determined by the distance of separation of jaws. The reference mark are nasospinale and chin point .The distance of these two marks is VD.

临床上，面下部垂直距离的参考标志点一般用鼻下点和颏下点，这两点分别于口裂的上、下方。