Suggest Remedy To Treat Twist In Lower Leg Bone

hello, its problem my friend is facing,his 18..... his suffered a fracture in leg bone few years ago,and after reaching this age he realized that his lower leg bone isn't like normal straight bone,its little twisted....may be lack of mineral/genetic as my grandpa too has this condition and we see the difficulties it will create at old age....his cool but he no more participates in sport activities fearing it could cause more stress and worsen it.....i wish i could help him in any way and wonder if reshaping bones at this age is possible..... if possible please answer this query now...