The posterolateral elements on the right from L4 to S1 were prepared for fusion in routine fashion, and BMP sponges with supplemental vertebral autograft was placed in the posterolateral fusion bed as well as the vertebral autograft in the dorsal aspect of the L4-L5 and L5-S1 facets on the right in a routine fashion. 
The posterolateral elements on the right from L4 to S1 were prepared for fusion in routine fashion , and BMP sponges with supplemental vertebral autograft was placed in the posterolateral fusion bed as well as the vertebral autograft in the dorsal aspect of the L4 - L5 and L5 - S1 facets on the right in a routine fashion .