In a clinical diagnostic approach to orthognathic deformities, the patient's past medical and dental histories and the indications and potential complications of mandibular body ostectomy and osteotomy are important considerations. The need for a team approach in the diagnostic, orthodontic, and surgical phase of the treatment is also important. The mandibular body procedure has a definite place in the armamentarium of the oral surgeon because certain mandibular deformities can be corrected only by this method. Predictable and stable results can be expected in indicated cases if one adheres to the principles of exacting surgical technique, precision immobilization, and neuromuscular balance. Presurgical and postsurgical orthodontic treatment enhances the functional and esthetic correction and furnished indispensable surgical fixation appliances for precision segment immobilization.