This textbook outlines basic information on the assessment, diagnosis, treatment planning, and treatment of individuals with dentofacial deformities through orthognathic surgery. It covers the principles of orthognathic surgery, systematic patient evaluation, the diagnosis and treatment of typical and complex deformities, and surgical techniques, with case examples and photos. This edition adds new developments and ideas; extends chapters; and adds new sections on the diagnosis and treatment of hemifacial microsomia, the role of total temporomandibular joint replacement in orthognathic surgery, functional and esthetic nasal control with Le Fort I osteotomy, functional tongue reduction for open bite cases, and the indications and implementation of a unilateral sagittal split osteotomy for the correction of mandibular asymmetry. Annotation ©2022 Ringgold, Inc., Portland, OR (protoview.com)