New classification of rating facial nerve dysfunction.

In consideration of the complexity of the physiopathology of the facial nerve and to get a standard model of classification of his dysfunction, it appears evident the necessity in the clinical practice to have a rapid, simple and easy system. Grading of facial function is necessary for evaluating and communicating the spontaneous course and the results of medical and surgical treatment. Different grading scales have been proposed but none has been universally accepted; the author revises the principal systems of classification and proposes a new and easy model.