There are many options out there to whiten your teeth and many reasons why you may or may not whiten. Talk to a dentist who has experience and they should be able to guide you.
A quick review of whitening is as follows:
1-Crest whitening strips can work, especially on children and young adults if they would use them. I also find they take out brown spots on front teeth.
2-Take home bleaching trays with gels like Opalescence do work but it is up to the patient to do...
When people say Laser Teeth Whitening, they are usually referring to IN-OFFICE teeth whitening where the patient sits in font of a lamp with a gel that is activated by a lamp. The procedure takes about 60-90 minutes.
When we talk about Bleaching, we are usually talking about using a carbamide peroxide gel in a custom-made tray for 7-10 days AT HOME.
Lasers are one method to activate whitening solution for in-office power whitening. It was very popular 8-5 years ago before other light systems were developed that work equally as well. Many dental offices refer to all light activated power bleaching as laser whitening in a generic sense. All of these methods whiten teeth in 1-2 hours as opposed to 2-4 weeks with trays.
Most laser systems are simply using the laser to activate or heat a gel that is applied on the teeth to bleach. Essentially it is the same thing, but the hope is that the laser is faster. However, faster sometimes means not as long lasting, so long term maintenance is mandatory.
All whitening systems are temporary in nature and need to be maintained.