 Gelfoam was placed over the roots laterally, corticated transverse processes lateral facet joints were prepared, small infuse sponge was placed posterolaterally on the right side, then the local bone graft from L4 to S1. 
Gelfoam was placed over the roots laterally , corticated transverse processes lateral facet joints were prepared , small infuse sponge was placed posterolaterally on the right side , then the local bone graft from L4 to S1 .