Is it possible to grow naturally the shredded tooth enamel?

Your dentist first of all shouldnt have taken off your enamel in the first place. If it is a healthy tooth having that amount of enamel is good for it. Taking it off is the worst idea. It can make it so you have sensitive teeth and more brittle. So you would probably need to get a veneer/lumineer or have that tooth bonded to bring back shape to it. Bonding is a type of composite material that is similar to what they use for fillings, it is matched to your tooth color now and is sculpted to your tooth to make it look how you want it. Bonding the tooth will be less expensive than getting a veneer on it but those are the only things you can do. You enamel will not grow back, once its gone its gone.