C.L.
its basically when the teeth begin to form (as a fetus) there is a lack of calcium in the enamel, making them weaker and more susceptable to caries, more sensitive to hot/cold/pressure. also it doesnt always neccesarily mean that the permanant teeth will have the same problem.i would advise you to have your child stay away from carbonated beverages, highly acidic fruits and whatnot. also using toothpaste like sensodyne will help with sensitivity. the biggest issue for people is usually cosmetic. most times, hypocalcified teeth will have white, yellow or even brown spots on them..