Fig. 1From: Comparison of the PEEK cage and an autologous cage made from the lumbar spinous process and laminae in posterior lumbar interbody fusionA series of images showing the preparation the natural cage: bone block harvested from the excised spinous process was trimmed into a natural cage and the blocks from the laminae were cut into small pieces (a). Images showing the comparison of the natural cage and a cage model (b.c)Back to article page