I’m surprised that this surgeon has gone back to a technique abandoned some years ago due to the problems of neck pain and recurrent stenosis. When the disc collapses, the foramen (the nerve tunnel in the bone) also collapses and the only way to restore foraminal height is to place a graft (a spacer) between the two vertebra, thus the fusion was born about 50 years ago. Before that, the laminoforaminotomy was common but neck pain and recurrent nerve compression were much more common also.
I would advise a CT scan and either re-discuss this with your surgeon or obtain a second opinion (or both).
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.