Which of the following is the best material for bone grafting in oral region?

Ilium provides excellent corticocancellous struts, which may be used as solid interpositional grafts to replace continuity defects in the mandible or osteotomy sites in the maxilla and mandible. Ilium is a generous of cancellous bone. This cancellous bone, harvested alone, is used to fill large cavities such as maxillary alveolar defect in cleft lip and palate patients.