objective to observe the differences of the osteogenetic ability and the healing process between the natural non-organic bone (nnb) in subperiosteal implantation and in bone defect implantation.
目的观察天然型无机骨骨缺损内与骨膜下植入后在成骨能力、愈合过程上的差异。
aim: to investigate the osteogenetic ability of calcium sulfate bone graft in posterolateral lumbar spinal fusion by comparing with local compression bone.