Experimental study on treatment of femoral head necrosis in rabbit with transplantation of bone marrow stromal cells / 中国矫形外科杂志

ABSTRACT

[Objective]To investigate the repairing effect and mechanism for treatment of femoral head necrosis on transplantation of bone marrow stromal cells.[Method]Twenty-four Newzland rabbits were divided into two groups randomly,Group A as core decompression group and Group B as Bone marrow stromal cells autograft group.Animal femoral head neorosis model was made by freezing method with liquid nitrogen.After freezing and drilling,The drilled necrotic cavities of Group A was implanted with gelatin sponge,while of Group B was with gelatin sponge combined by bone marrow stromal cells.Three animals in every group were sacrificed respectively at 2,4,6,8 weeks and subjected to radiograph and microscope examination.[Result](1)Radiograph examinationAt 2 weeks,the drilled holes in Group A and B all presented low density images.At 4 weeks,the density in the drilled holes increased in group B and the density around the drilled holes increased in group A.At 8 weeks,sclerotic line formed around the drilled holes in Group A and trabeculae appeared in the drilled holes in group B.(2)Microscope examinationin group A,at 2 weeks,a few inflamatory cells appeared in the holes with many osteoblasts and ostoid appeared around the drilled holes.At 8 weeks,marrow formed in the drilled holes in group B,at 2 weeks,there were a large amount of osteoblasts in the drilled holes and some ostoid formed around thc drilled holes.At 4 weeks,the drilled holes were full of trabeculae.At 8 weeks,the trabeculae matured with the marrow appeared in the intertrabecular space.[Conclusion]Bone marrow stromal cells autografting may be an effective way to treat rabbit femoral head necrosis.