Ilizarov had modified the standard method of osteotomy. Clinic investigations had induced him that it is necessary to save internal parts of the bone intact, including bone medulla, intraosseous blood vessels. Minimal operative traumatization of the bone and soft tissues optimizes biological conditions, which are necessary for the genesis of the new bone. Ilizarov's modification of osteotomy includes the cut of only cortical layer of the bone with the maximal saving of periosteum and bone medulla. That's why it has taken the name corticotomy.
Osteotomies can have different form and cut direction that is caused by the treatment goals.
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