Advances in technology mean that modern veneers can remain in good condition for years, though certain circumstances may require them to be replaced. For example, they can become worn at the edges or discolour over time. Composite veneers are more susceptible to discolouration and may need replacing sooner, whereas porcelain veneers are more resistant to colour changes. It is important to look after your veneers as carefully as possible to extend their life span.