The colouring materials of various colourful drinks (coffee, tea, coke) or smoking will be
absorbed into the dental enamel. Some medicine, the decomposition products of dead teeth,
change the colour of deeper layers in teeth, cause so-called internal discolouration. Modern
teeth whitening treatments used in case of real discolouration give excellent aesthetical
results. Whitening of an individual tooth is carried out in the dental surgery in one sitting. The
treatment can be started at any age of life, its effect can last for approximately four years.

Professional teeth whitening refers to a technique
where a whitener is applied to your teeth by your
dentist in their dental office. In contrast, at-home
teeth whitening is a process where the dental
patient takes the bleaching materials home with
them and performs their bleaching treatments on
their own, unsupervised.

At-home teeth bleaching typically requires that the
product user performs whitening treatments each
day, over a series of weeks. In comparison, the

number of professional teeth bleaching treatments that are performed is typically much fewer in
number, possibly even as few as one. It has been suggested that, as a ballpark estimate, one
hour of in-office whitening treatment can produce the same whitening effect as one to two weeks
of at-home tray-based whitening.

Profesionnal ZOOM Teeth whithening

The original Zoom! ™ whitening system uses a hydrogen peroxide-based tooth whitener. This
product comes prepackaged as two individual components, a 32% hydrogen peroxide gel and
a proprietary "activator." These two components are then mixed at the time of application to form
a working gel that has a 25% concentration of hydrogen peroxide and a pH between 7.5 and 9.
The Zoom2 ™ teeth whitening system gives the dentist the opportunity to utilize either a 16 or
25% whitener. The Zoom! ™ teeth whitening system protocol includes the use of a mercury
metal halide light. The Zoom! light unit has an infrared filter. This is significant because filtering
infrared emissions helps to minimize the amount of heat generated at the surface of the teeth
during the whitening treatment. When the Zoom! ™ bleaching light is placed into position it is
capable of illuminating all of the teeth being treated (both upper and lower) simultaneously.

At home teeth whithening

While there are several different systems a person might use to whiten their teeth, in the last
decade it is tray-based whitening that has become the most widely utilized at-home teeth
bleaching method. This technique utilizes a custom formed plastic tray prepared by the dentist
that fits comfortably over the wearer's teeth. Bleaching gel (carbamide peroxide) is placed into
this tray and the tray is then worn for multiple hours a day (or else overnight), for some weeks,
as the effects of the whitening process take place. At-home tray teeth whitening can be a safe
and effective way for a person to bleach their teeth, but it is important for anyone choosing to
utilize this type of system to realize that essentially all of their whitening treatments will be
performed on their own, with absolutely no direct supervision by a dental professional.
Because of this, anyone bleaching their teeth must be certain that the specific whitener they
are using is safe, and that they know how to use this product in an appropriate manner