| Relationship between Radiological Outcomes and BMD Based on Lumbar Vertebrae in Single-level Anterior Cervical Discectomy and Fusion |
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O Ik Kwon , Dong Wuk Son , Sang Weon Lee , Geun Sung Song |
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Department of Neurosurgery, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, Yangsan, Korea |
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| Abstract |
Objective
Bone mineral density (BMD) is important in predicting mechanical strength of cage subsidence in increasing aging population. However, BMD based on cervical vertebrae is not routinely measured for cervical degenerative diseases. This study determined the association of the subsidence in anterior cervical discectomy and fusion (ACDF) and BMD data based on lumbar vertebrae.
Methods
Radiological data of patients who underwent ACDF for one-level disc disease at our hospital were retrospectively collected from January 2012 to December 2014. Radiography and computed tomography scans were performed for radiological evaluation. Global cervical lordosis (GCL), fused segment angle (FSA), fused segment height (FSH), and disc space height (DSH) were measured and analyzed.
Results
Successful bone fusion was achieved at the final follow-up examination in all patients who underwent ACDF. However, loss of disc height over 3mm at the surgical level was observed in two patients in the osteoporosis group. Although all outcomes of the osteoporosis group were slightly lower than those of the normal group, there was no significant difference between the groups (p>0.05).
Conclusion
BMD based on lumbar vertebrae was not a significant factor to subsidence after ACDF. To better understand the cervical bone, it may be necessary to obtain BMD of surgical levels. |
| Key Words:
Bone mineral densityㆍCervical vertebraeㆍPostoperative complicationsㆍSpinal fusion |
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