Fig. 13From: Application of botulinum toxin in maxillofacial field: part I. Bruxism and square jawDiagnosing method for square jaw: sonograph. With the help of Panorama, skull PA, and sonograph of masseter muscle, you can identify the skeletal portion and patterns of muscle hypertrophy, and able to decide which one to use: surgical intervention or botulinum toxin injectionBack to article page