What exactly is a dental whitening procedure? Essentially, it is a procedure that removes stains and pigments from the enamel and dentin. Depending on the shade of the teeth and the reason for their formation, we also have to take different methods to whiten teeth! Generally, there are five methods to perform teeth whitening as follows: 1. External tooth bleaching method External tooth bleaching method is divided into home whitening or cold light whitening. Applicable people: exogenous coloring, i.e. yellowing and blackening of teeth caused by smoking, drinking coffee, chewing betel nut, etc. The advantages of external bleaching method: fast bright white, beautiful color. 2, the teeth within the bleaching method Internal bleaching method for the population: fluorosis, tetracycline teeth or nerve necrosis of the teeth. It is especially suitable for single teeth. Advantages of internal bleaching method: It is good for tetracycline, fluorosis, discolored teeth due to pulpal necrosis, etc., especially for single tooth bleaching. Disadvantages of internal bleaching method: The so-called internal bleaching is to put bleaching agent in the pulp cavity for bleaching. The pulp chamber is originally the place that houses the nerve of the tooth. If you want to do bleaching, you need to remove all the nerves from the tooth. This can be very damaging to the tooth and painful for a living pulp tooth. Professional dentists will not recommend the use of internal bleaching to make tetracycline teeth and fluorosis teeth white! 3, resin veneers Resin veneers are suitable for people with light to moderate discolored teeth, dark or yellow teeth, but limited financial ability to afford porcelain veneers, porcelain teeth. Advantages of resin veneers: the effect will be better and the price is easy to accept. Resin veneers disadvantages: resin repair time too long easy to age discoloration, and easy to fall off. 4, porcelain veneers porcelain veneers for people: light to moderate tetracycline teeth, fluorosis people. Due to the limited effect of porcelain veneers shade, and if the use of white color bonding agent, will affect the translucency of the veneers. Therefore, it is less suitable for heavily discolored teeth. Advantages of porcelain veneers: You can grind your teeth or not. Even if the teeth are ground, the amount of teeth to be removed will be less than for porcelain crowns. Disadvantages of porcelain veneers: The shading effect is not very good and is not suitable for heavily discolored teeth. The price will be more expensive. 5, porcelain crowns Porcelain crowns are suitable for many teeth with dark yellow color, heavy fluorosis, tetracycline discolored teeth, and economic ability to allow people. Porcelain crowns advantages: better shading effect, stable nature, more durable. Disadvantages of porcelain crowns: the whole tooth needs to be ground down a circle, and the restoration cannot be replaced with another restoration. No matter which of the five methods mentioned above, you need to be treated by a professional dentist in a professional dental medical institution. Otherwise, you will be creating bad restorations for your professional dentist, leaving a second chance of restoration that will not be worth the loss!