Dental Centres have virtually invisible aligners called Invisalign which are made of thermoplastic material that is uniquely developed. These are developed for their Invisalign treatment plan that looks similar to teeth-whitening trays. They have a series of Invisalign aligners that are custom-made for you, to move your teeth in the sequence that is determined by the doctor. Once the trays are ready, then you are also ready to start your teeth straightening program. You will need these set of Invisalign trays for two weeks at a time. Each tray is manufactured so that the teeth are slightly straighter than the previous tray. Check out their website or visit their office located at 12 Yonge St #8, Toronto, Ontario M5E 1Z9, Canada. You may also reach them at (416) 214-9119.