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. 2012 May 31;6(2):105–114. doi: 10.4184/asj.2012.6.2.105

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Copyright © 2012 by Korean Society of Spine Surgery

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 4 — A 53-year-old woman with L4 spondylolisthesis. (A) A preoperative lateral radiograph shows a vertebral slip of 18% and intervertebral disc index of 0.13 at L4-5. (B) An 8-year postoperative radiograph shows complete union. The ceramic interspinous block is seen in the interlaminar space. (C) Adjacent disc degeneration is observed in a 16-year postoperative radiograph. The upper disc (L3-4) shows anterior vertebral slip of 16.7% (arrow). The lower disc (L5-S1) shows osteophyte formation and collapse (arrow head).