Fig. 1

Twelve-month visit AP radiograph. Subject that was diagnosed with grade II degenerative spondylolisthesis and osteoporosis and that was treated with osteoporosis-related medications. Subject received 15 cc TE and 10 cc locally derived autograft. Robust bilateral bone bridging observed at 10.5 months. Patient fell at 6 months postoperatively and obtained a T9 compression fracture, although this apparently had no adverse effect on the fusion mass