Upper lip tie: A novel classification scale with improved inter-rater reliability.

While the Kotlow and Stanford systems are based upon a single anatomical parameter, our novel 3-point classification scale uses three oral parameters that encompass anatomical points of attachment as well as the maximal length of the ULT on stretch. Our classification scheme is the first to incorporate a functional parameter of the SLF, and thereby more fully characterizes ULT.Level of Evidence: Level 4.