Creation and Validation of the Facial Diplegia Scale for Assessment of Bilateral Facial Palsy.

: House-Brackmann (HB) classification and the Sunnybrook Facial Grading System (SFGS), both reference tools for the assessment of facial palsy, are not suitable for bilateral facial palsy. The aim of this study was to develop, standardize, and validate the Facial Diplegia Scale (FDS). : The FDS was standardized in a healthy population ( = 111) and validated in 40 patients with diplegia.