How long can you expect a new smile to last? Porcelain veneers tend to have a lifespan around 10 to 20 years depending on the quality of care they receive, but at some point, they will have to be replaced for one reason or another. If you’ve become accustomed to having a brighter, more attractive smile thanks to veneers, then you’ll definitely want to have them replaced as soon as possible so that you can continue to enjoy the benefits of cosmetic dentistry. Here are 4 warning signs that your current veneers won’t last much longer.