There are many different treatment options to choose, from with some lasting longer results than others. For example, Teeth whitening can last for 1-3 years, and porcelain veneers or crowns can last for up to 15 years or more. The most effective way to maintain the results of your smile makeover is to exercise good oral hygiene habits. Brushing and flossing your teeth daily and attending regular dental visits can keep your teeth looking strong and vibrant for years to come.