Relevance. To-day, the stomatological market offers a peroxide-free system with the activation by a light-emitting-diode lamp generating a «cold» light. Material and methods. The present study included 35 patients at the age from 18 to 35 years having a substantially altered teeth colour who underwent professional vital dental bleaching with the use of a peroxide-free system activated by a light-emitting-diode lamp. Results. It was shown that teeth whitening combined with the use of nanohydoxyapatite-based erosion prevention agents is instrumental for maintaining the high efficiency of mouth cavity hygiene. It significantly (p<0.001) increased the number of intact sextants (based on the CPI index) with a tendency toward a decrease in the number of bleeding sextants. The bleaching enhanced teeth sensitivity and ensured an improvement of 5.0 shades in their colour (based on the reorganized VITA scale). Conclusion. The application of the peroxide-free system with the activation by a light-emitting-diode lamp in the combination with the use of nanohydoxyapatite-based erosion prevention agents provides an efficient tool for the aesthetic correction of the teeth colour in the patients with dental discoloration.