Динамика Курса Швейцарского Франка Chf К Рублю, Доллару, Евро, График Изменений Колебания Курса Швейцарского Франка За Неделю, Месяц И За 2021 Год, Конвертер, Котировки Валюты На Сегодня, Прогноз На

Tooth whitening (termed tooth bleaching when utilizing bleach), is either restoration of natural tooth shade or whitening beyond natural tooth shade, depending on the definition used. Restoration of the underlying, natural tooth shade is possible by simply removing surface (extrinsic) stains (e.g. from tea, coffee, red wine and tobacco) and calculus (tartar).

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