There should be no problem with Coolsculpt and any metal implants or fusions. You should be ok. Good luck
Yes, you can have Coolsculpting with metal fusions in the back. For best results with Coolsculpting, a combination approach is needed. I recommend adding radiofrequency treatments like Vanquish, Venus Legacy, Exilis Ultra for skin tightening and with Z wave/Cellutone for skin smoothing. However, a Vaser with ThermiRF procedure is the best combination for a toned result, but requires more downtime. See an expert. Best, Dr. Emer