What is a dental bridge lifespan?

I am getting 4 Unit dental Bridge on upper front teeth (zirconia Bridge) 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 or 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. If possible kindly give no. of years expected to last