This study aims to gather information on the use of OssDsign® bone grafts, which are substitutes for natural bone used in spine fusion surgery. Spine fusion is a procedure to join two or more bones in the spine. The study, called "Propel," will take place at multiple locations in the United States and will observe real-world results after the surgery. The goal is to follow 300 patients for two years after their surgery to see how well they recover and how the bone grafts work.

To join the study, you need to be at least 21 years old, have been chosen for spine fusion surgery using an OssDsign® bone graft, and be able to follow the study requirements, like attending check-ups and completing forms. You will need to visit the study site regularly for two years to track your progress.

• It lasts about 24 months, with regular follow-up visits.
• The study is open to adults over 21 undergoing spine fusion surgery.
• Participants must commit to follow-up visits and evaluations for two years.