Porcelain veneers generally last between 10 to 15 years. However, the precise time and schedule depends on the individual patient. It also depends on a number of factors, including your own personal tooth care regimen. Brushing and flossing are as important for teeth with porcelain veneers as they are for natural teeth. You can help their longevity by avoiding sugary foods as well.
The current technology available in modern dentistry makes porcelain teeth appear stronger, but products that stain teeth, i.e. soda or alcohol, should still be avoided. These beverages can also weaken the bond between the natural tooth and the veneer attached to it.
There are tooth habits such as grinding or chewing on nails which can hurt the longevity of veneers, causing you to replace them sooner.
When your veneers have become worn, chipped, or discolored, you will know they are ready to be replaced. Similar to when they were first placed, replacing veneers requires an impression of your teeth to use for creating the new ones. The new veneers will be bonded to your tooth surface in the same way. It is important to remember that these thin shells are a permanent alteration to your teeth and replace them is part of your dental health.