 Then, the area corresponding to the C-shaped osteotomy was marked and then we proceed in conjunction with Dr. Y to develop these osteotomies with the help of the Midas by retracting the contents of the skull at the level of the anterior fossa as well as the orbital contents with the help of a ribbon retractor. 
Then , the area corresponding to the C - shaped osteotomy was marked and then we proceed in conjunction with Dr. Y to develop these osteotomies with the help of the Midas by retracting the contents of the skull at the level of the anterior fossa as well as the orbital contents with the help of a ribbon retractor .