1, Conclusion Radionecrosis of jaws can be cured by extensive resection of sequestrum, immediate vascularized tissue grafts can b...

2, Pyogenic rachitis easily lead to violations of the adjacent intervertebral space Narrowing, there were parts of the small sequestrum and vertebral body side abscess.

3, The cure rate of ROJ was 92% by extensive resection of sequestrum. The survival rate of transplant flap was 95% by immediatevascularized tissue graft.

4, Jaw is reached inside oral cavity facial skin forms most fistula hole, discharge pus for a long time, sometimes but eduction small sequestrum .

5, CT could clearly demonstrate the extent of bone involved, the destruction of cortex, periosteal reaction, change of soft tissue and sequestrum .

6, The cure rate of ROJ was 92% by extensive resection of sequestrum.

7, Objective To study the effect of intervention, core decompression, sequestrum evacuation and bone grafting for the treatment of femoral head avascular necrosis.

8, All patients had smooth course of removal of the hardware and sequestrum without conversion to traditional open methods.