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We performed a comparative study of iliac bone graft (the iliac bone group) and carbon cage with local bone graft (the cage group) in PLIF to evaluate the clinical results of both methods. We examined both groups about the operating time, the estimated blood loss, the operative results using the score rating system of Japanese Orthopaedic Association (JOA score), and the presence of bone union on radiography. The operating time and the estimated blood loss of the cage group were statistically less than those of the iliac bone group. There were no significant differences between both groups about the operative results. The radiographic evaluation on bone union showed that half of the iliac bone group had collapsed union, but all cases of the cage group revealed union without collapse.

Comparative Study of Iliac Bone Graft and Carbon Cage with Local Bone Graft in Posterior Lumbar Interbody Fusion