For minor teeth issues of the teeth, the composite white filling can be used. For example for cracked and chipped teeth, this can be used. The filling is typically composed of the composite resin material which is bonded to the tooth so that the gap can be addressed. But for major teeth issues like wear and discoloration, then the porcelain veneers can be used as the answer. In-office tooth bleaching is also the safest. Unlike tooth whitening done at home, in-office whitening is conducted and monitored by a professional practitioner. Risks therefore, no matter how low and the aftereffects no matter how mild is attended too eliminating discomfort. Not everyone is a good candidate for in-office teeth whitening. The good thing is that while the staining agents worked its way through the pores in the rods, the whitening agents also use that access to free the teeth of the stains through oxidation reaction. For this two main whitening agents are used, the hydrogen peroxide which is a strong bleaching agent for many bleaching purposes and the much milder carbamide peroxide. Peroxides when it gets in contact with the soft tissues inside the mouth will often give a tingling sensation that may not be pleasant to about half of the patients undergoing teeth whitening. Peroxides also have a taste that may be unpleasant to some. In any case though the taste is very bearable and the tingling sensation may be ticklish but the feeling is always a cleaner mouth afterwards. For these, internal bleaching must be done by a professional. The process is basically the same. A bleaching agent will be placed and sealed inside the tooth that will make its shade lighter given time. Not all teeth are white. The teeth have sixteen varying shades. While a temporary tooth may be sparkling white, the teeth replacing it may be not. Either way, it can be expected that the whitening effect can be achieved. There are some cases when light or the laser will be used. The light will act as the heating agent that will be used to activate the peroxide content in the whitening formulation. The said whitening agent or formulation will then be allowed to stay on the teeth for the next 30 to 60 minutes.