Fig. 3

Horizontal cut with UBS for creating trough space by cutting out the bone block. Virtual image showing navigated UBS is being used to cut out the bone block ventral to the cord and thin slab (inset)
Horizontal cut with UBS for creating trough space by cutting out the bone block. Virtual image showing navigated UBS is being used to cut out the bone block ventral to the cord and thin slab (inset)