Nine mature and healthy dogs were divided into 4 groups randomly. The first group consists of 3 dogs

and the rest groups

2 dogs. Self-control way was used. The left ilium was the experimental site

where the bone piece with sartorial muscle attached was cut from ilium. The right side served as control

where the graft bone from ilium was wrapped up with silica gel

then fixed subcutaneously. The pedicled bone pieces were retrieved in 2

4

6

8 week after surgery

the size of graft bones from two sides were the same. Survival range

osteogenic formation of muscle-pedicle bone were examined by 99mTc-MDP bone imaging and histological method to evaluate the clinical value of treatment of ischemic osteonecrosis of the femoral head with muscle-pedicle bone grafting. The results were as follows: 1. The part of bone attached by the sartorial survived

but osteonecrosis was observed at the location of 1.2-1.7 cm from attached point of muscle. 2. There were two forms observed in the course of osteogenic activation of muscle-pedicle bone. Under the reduction of mechanical stimulation and blood supply

bone marrow tissue was replaced by fiberogranulation tissue and new capillary in the survival part

while the survival bone of proximal part grew distally and gradually replace the dead bone of distal part. 3. Histological examination revealed that small amounts of fiberogranulation tissue and new capillary appeared in 2nd week

primary trabeculae appeared in 6th week

and in 8th week

some trabeculae recovered their normal appearance and osteogenic cell reduced remarkably. 4. Survival range of muscle-pedicle graft bone was directly proportional to the width of muscle pedicle. Therefore

radionuclide bone imaging and histological examination demonstrated that muscle-pedicle grafte bone was a piece of bone with relatively poor blood supply

its effect in repairing necrosis and collapse of the femoral head is limited. 99mTc-MDP bone imaging may be an effective and first choice method for the early monitoring of the muscle-pedicle bone graft osteogenic activation.