This looks like two scars from the accident. If they are dermal, then your hair will likely not grow back and you might consider FUE transplanting or cosmetic revision surgery to improve the appearance. A combination of both should result in a normal appearance. If this is a photo of a superficial abrasion from the accident, you may get your hair back.
The photos make it a bit difficult to say. In general there are both temporary and permanent forms of hair loss after traumatic injury.It's hard to say if you'll grow hair back fully. Proper wound care, and control of infection gives the highest chance of regrowth. In general, an individual will know in 9 months if any amount of hair loss is permanent.