Nelson Bass-Howell"s answer to Did the spinosaurus have a fragile spine?

I suggest you read this, It might answer your question in more detail than here. Long and short, no, damaging the neural spines will not mean instant death toSpinosaurus. That is a paleomyth, the spinal cord itself would be too far into the actual back for sail damage to be of any harm. There was a thick layer of flesh at the base of the sail, like a low ridge, according to Ibrahim et al (2014). That fleshy layer prevents the sail from snapping.Lastly, there is evidence ofSpinosaurussustaining an injury on its neural spines, and the wound showed signs of healing. That alone is enough proof.