Does transplanted hair have permanent life?

The hair on top of the head are DHT (dihydrotestosterone) sensitive and are prone to hair fall but the rest of the hair on the body (ie back of the head, beard, pubic area etc) are DHT resistant. Since we implant these DHT resistant hair in the scalp, they do not fall. So theoretically speaking, Hair Transplant is a long lasting procedure but 5-10% hairfall in the transplanted area is observed which is acceptable