 A midline incision was made over the L3-L4 disc space taking through subcutaneous tissues sharply, dissection was then carried out to the left of the midline with lumbodorsal fascia incised and the musculature was elevated in a supraperiosteal fashion from the level of L3. 
A midline incision was made over the L3 - L4 disc space taking through subcutaneous tissues sharply , dissection was then carried out to the left of the midline with lumbodorsal fascia incised and the musculature was elevated in a supraperiosteal fashion from the level of L3 .