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Journal of Korean Neurosurgical Society 1999;28(6): 809-816.
Clinical Results of Posterior Lumbar Interbody Fusion with BAK Cage.
Byung Ho Jin, Young Soo Kim, Ho Yeol Zhang, Yong Eun Cho
Department of Neurosurgery, Yonsei University College of Medicine, Seoul, Korea.
ABSTRACT
OBJECTIVE
In the management of degenerative conditions of the lumbar spine, spinal fusion is a popular management option and posterior interbody fusion is gaining wide acceptance for the treatment of segmental instability, spondylolisthesis, and discogenic pain. Many methods have been described, including use of autograft or allograft bone, in either structural or nonstructural form, with or without additional fixation. METHOD: The authors retrospectively analyzed 102 cases of posterior lumbar interbody fusion with BAK cage from March 1993 to April 1998. All patients have been followed for 24 to 56 months. Postoperative clinical and radiological changes are evaluated by Mcnab criteria and dynamic lumbar spine lateral measurement. RESULTS: Stable bony fusion was accomplished in 81.9% of patients at 12 months, in 87.4% of patients at 24months, and in 91.2% of patients at 3 years after surgery and their overall outcome was also remarkable(excellent: 42.2%, good: 49.1%). Postoperative correction of slipping was average 3.1mm in spondylolisthesis group. Seventy-eight percent of the previously employed patients returned to work by 24 months after surgery, and 94% were working at 3 years after surgery. CONCLUSION: The results of this study strongly imply that the BAK cage is safe and effective in the management of certain forms of degenerative conditions of lumbar spine. However proper patient selection is critical and experienced and properly trained spinal surgeons should perform this procedure.
Key Words: BAK; Posterior lumbar interbody fusion
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