Freeze-dried bone chips were implanted in 20 patients with defects after curettage of bone tumor. Patients were followed for 2 to 36 months. Diagnoses of the tumors were as follows: enchondroma (11 cases), solitary bone cyst (5 cases), aneurymal bone cyst (2 cases), and others. The evaluation of the result was made by new bone formation on roentgenogram and the immune response. All bone lesions were found to be remodelled to some degree within 7 months. And no immune response had occurred with the exception of a case showing fever-up.
