I am getting 4 Unit dental Bridge on upper front incisors wherein the middle two will be pontic and the outer two will be crowned. I am getting this Bridge after my braces treatment so my bite is proper and I don't have any bruxism or grinding habit. Also I don't have any oral disease and my crowing teeth are healthy. I want to know for how long can I expect my Bridge to last if I don't put much stress on it and take proper care of it at home. (Kindly give answer in number of years if possible, also I am getting zirconia Bridge)