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Journal of Korean Neurosurgical Society 2001;30(5): 605-610.
Efficacy of Calcium Sulfate Pellets as Bone Graft Substitute in Lumbar Posterolateral Fusion.
Seung Ku Lee, Choong Hyun Kim, Jin Hwan Cheong, Koang Hum Bak, Jae Min Kim, Suck Jun Oh
Department of Neurosurgery, School of Medicine, Hanyang University, Seoul, Korea.
ABSTRACT
OBJECTIVE
The authors investigated the efficacy of the calcium sulfate(OsteoSet(r) pellets) as an autograft extender when used to perform posterolateral lumbar fusions. PATIENTS AND METHODS: Twenty patients who underwent lumbar posterolateral arthrodesis for various spinal diseases between October 1999 and March 2000 were evaluated. Arthrodesis was performed by transpedicular screw fixation and bone grafting with a mixture of autograft + calcium sulfate in a 1:1 ratio. At time intervals of 1, 2, 3, and 6 months, postoperative radiographs were obtained to review the resorption of calcium sulfate and the evidence of fusion. A modified Lenke scale was used to assess the status of the fusion.
RESULTS
At 2 months after operation, the average modified Lenke scale score for the OsteoSet(r) pellets group was 3.8. However at 6 months after operation, the average modified Lenke scale score for the OsteoSet(r) pellets group was 1.8. Resorption of calcium sulfate pellets was revealed in all cases at 6 months after surgery.
CONCLUSION
It is presumed that a combination of calcium sulfate and autograft can play a role as an effective autograft extender in the posterolateral spinal fusion.
Key Words: Calcium sulfate; Lumbar posterolateral fusion; Substitute; Modified Lenke scale
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