One and 1/2 years of symptoms with 3 months in brace without relief with continued activity. Sclerosis of left L5 pars and right pars is demonstrating active stress. “Adjacent bone edema also extends into the inferior articular facet of L5 on the right side” indicates a possible active fracture. I would obtain a limited CT scan of only the L5-S1 vertebra. This limited scan will reduce the radiation exposure by at least 50% (if the tech know what he or she is doing) and give much more information than the MRI can regarding bone healing and fracture presence. You can make better decisions once you know the fracture status.
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.