Your lizard will be fine. Eventually it should grow back somewhat, but it will never be as long as the original and it will not look the same. Typically the scales are smaller and they don't grow back the lost vertebrae, instead they're replaced by a cartilaginous rod.
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Matt Campbell
25 years herp keeping experience
Full-time zookeeper
Personal collection - 21 snakes (9 genera), 20 lizards (4 genera), 6 chelonians (2 genera)