at 10 months the fusion should be doing quite well under most circumstances. also a spinal fusion today usually involves a permanent spacer that's screwed to the vertebrae and this is very durable. however certain groups (like smokers or those who take certain medications) may have slower-healing fusions than others. if you're concerned that you injured your fusion you'd be wise to call your surgeon's office for an appointment or at least to speak to the nurse or physician assistant by phone. hope this helps!
i have had a multi-level spinal fusion done 10 months ago is it possible to damage the fusion or is it muscle strain