After a tooth whitening procedure you can expect your teeth to keep their colour for approximately 2-4 years. However if you maintain a normal diet with tea, coffee and other coloured foods these will inevitably discolour your teeth over time. A simple way to prolong your result long-term is to top up the whitening procedure either 1 or 2 nights every 3-5 months if you notice some yellowing of your smile. We suggest you purchase some extra whitening syringes and store them in the fridge for top-ups when required. We also recommend you attend the practice every 3 months for hygiene clean to remove superficial staining and deposits to maintain your lovely new smile all year round..