Generally, ALIF (anterior lumbar interbody fusion) needs a backup for stabilization as this construct is not that stable by itself. Anterior fixation is not as strong or as stable as posterior fixation so that is why most ALIF surgeons will place pedicle screws posteriorly to “shore up” the structure.
The reason that the surgeon said “give it time” is that he was expecting the fusion to “take” and reduce motion of the posterior structures. 4 months out from a fusion with continued “popping and clicking” makes me think the fusion is not taking and might have to be further addressed surgically. Typically, I like to wait 6 months and then get a CT scan to determine if fusion has a chance of occurring.
If you do get a solid fusion, then a partial pars removal (only on the side of symptoms) is the typical surgical procedure to decompress the root (if there is continued leg pain. The popping and clicking is more worrisome for non-fusion however.
Tightness in the neck and shoulders certainly could originate from the delayed union at the surgical level but could be independent and from another pathology altogether. A thorough workup would be indicated to determine the source of the symptoms.
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.