Antler deformities due to body injury can get better over time. Notice I said "can," not "will." Research on body-injury-induced antler abnormalities has shown everything for "gone the next year," to "gone over a number of years," to "permanent."
Now pedicle-injury-induced abnormalities are definitely permanent and get worse over time. Those can usually be identified when a buck grows an antler from the injured pedicle that forms a big single spike, or a cluster of spikes.