The average porcelain veneer will last about 10 years, but some people are able to keep them for 20 years or more with proper care. In other words, the lifespan of your veneers will not be set in stone. The one thing that you can be sure of, however, is that sooner or later you will need to get new restorations to maintain your beautiful smile. If you notice any of the 4 signs listed below, you should get in touch with your dentist quickly to ask about replacing veneers.