I agree with Dr. Pav. The most important thing in home whitening is how well the trays fit! If the trays dont fit well, the gel wont work! As soon as saliva gets into the tray it will de-activate the gel making it a pointless exercise. The trays your dentist makes are custom made and should fit snugly around your teeth. The home-made trays are poor fitting and you run the risk of exposing your gums to the whitening gel causing irritation and discomfort.
As with all things, you get what you pay for.
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DR NILESH R. PARMAR BDS (Lond) MSc (UCL)
Implant Surgeon/General Dentist- Parmar Dental
www.parmardental.co.uk
Associate Dentist- London Bridge Dental Practice
www.lbdp.co.uk
Implant Surgeon/Prosthodontist- SparklySmiles
www.sparklysmiles.co.uk
Accredited Gold Member British Dental Bleaching Society
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