The kyphosis of 30 degrees is a surgical curve that probably needs correction. It very well could be that the L2-3 level needed to be addressed surgically due to the increased strain from the upper kyphosis.
You have osteoporosis (T score less than -2.5) which is very unusual in a male, especially a younger male. I would hope you are going through the full work-up to determine the cause and are also getting treatment concurrently.
A fracture of L5 can give false readings if the lower lumbar spine is selected to check bone density. The readings will be higher (indicating more bone density than is really present) due to compaction of the trabecular bone secondary to the fracture which blocks more of the X-ray beam. Now that you have cement in the L5 vertebra, readings from that level will be inaccurate (as well as the operated L2-3 level).
Dr. Corenman
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.