The Type III forehead is the most common situation and occurs in more than 90% of patients. The forehead, in this situation, has a prominent bossing across the top of the brows, and that bossing is overly projected. A frontal sinus is present. The thinness of the sinus precludes using exclusively rotary instruments to thin the bone. An osteotomy and reconstruction are the only operations to provide the proper round shape to the forehead with the decreased prominence that is necessary for a soft forehead, which involves a setback of the anterior table of the frontal sinus. This procedure is described as Type 3 Forehead Cranioplasty.