OssDsign® Spine Registry Study ("Propel") is a research project to learn more about **bone graft substitutes** used in **spine fusion** surgeries. A bone graft substitute is a special material that helps bones heal and grow together. Spine fusion is a type of surgery to join two or more bones in the back. This study is being done at up to 10 places in the US. It will include patients who are getting a spine fusion surgery and using the OssDsign® bone graft. The study will follow 300 patients for about 2 years after their surgery to see how well they do. To join, you must be 21 or older and able to follow the study rules, including going to follow-up visits and filling out forms. You must also agree to join and understand what the study is about. If you join, you might help doctors learn more about these bone grafts and improve care for future patients.

• Study follows patients for 2 years after surgery.
• You need to go to follow-up visits and fill out forms.
• This study helps improve future spine surgeries.