Look up Jazz Banding. I really like it for relatively healthy cervical fusions. Basically instead of screws the vertebrae are tied together with a strong and non absorbable band. It's a clamp on this band that the bars are attached. This provides more flexibility for the patient.
Full disclosure, I do not have a cervical fusion. I just work in surgery and have the fortune of seeing multiple different systems used and have formed an opinion based on that. Ask your doctor, not me.