The results can be realized after a few days, and the white color of the teeth can be maintained for months provided of course that proper maintenance is made. The strips on the other hand are thin strips that are coated with the gel fortified by hydrogen peroxide. These strips are also attached to the teeth twice a day. In the bigger picture you can sense that the supervised teeth whitening sessions are known for their added benefits and advantages for the person. And this is the reason why this is getting popular in the market, even if this cost more. At least with the supervised process, you get extra and preferential treatment from the attending dentist. And since this is the laser whitening procedure, expect that light will be used as well and this is used to activate the gel. The whole procedure will go on for an hour and could whiten the teeth by as much as 10 shades. There will be times when the procedure may be repeated more than once to ensure that the deep stains can be addressed. When using hydrogen peroxide for example, the concentration of the mix that is recommended at the back of the bottle should be adhered strictly if not less than what is recommended just to test it out. While studies have shown (Kugel et al) that the effect of peroxides at decreasing the tooth enamel is very insignificant, it nonetheless tends to make the teeth more sensitive for some time and when the proportion of the mix is on the strong side, the mix could result to painful gums and cause irritation to the surrounding tissues inside the mouth. Once the women gave birth and has finished the lactating stage, then that is the time that whitening procedures are safer. For those with allergies, consider a stop first on the plans to have teeth whitening. This is especially true for everyone who is allergic to peroxide. Do you have a gum disease, exposed roots or you have worn enamel? Half of the reason why this product works can be linked to the proper use and application. It is recommended by oral health practitioners that this should be used twice a day. And through continuous use of around two to four weeks, there will be changes in the color of the teeth. Right now there are advances in the technology that allows for the teeth to become whiter at a shorter period of time.