The most direct method-ultrasonic tooth cleaning: ultrasonic tooth cleaning is the most common method to remove tobacco stains, tea stains and coffee stains, and directly removes dental plaque and dental plaque through high-frequency vibration generated by ultrasonic waves.

Prosthetic treatment-porcelain crown: The method of porcelain crown restoration treatment needs to grind off some natural teeth and then cover them with artificial materials. Its advantage is that the color of teeth changes obviously, but its disadvantage is that it has to face the possibility of complications caused by grinding off natural teeth and injuring pulp.

Bleaching therapy-drug bleaching: it is ineffective for severe dental fluorosis and tetracycline, and some patients may have side effects such as dentine hypersensitivity, but these side effects are short-lived and reversible.

Tips: Due to different dental conditions, the methods used are quite different. Therefore, before whitening, you must go to a professional plastic surgery institution for a detailed examination, and then choose the whitening method according to the doctor's advice.