Grooved u-shaped teeth whitening film
A groove-type, tooth-based technology, which is applied in the field of whitening film, can solve problems such as the inability to meet the U-shaped gum structure.
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[0166] The present invention will be described in detail below with reference to the drawings and embodiments.
[0167] The present invention includes a three-layer structure: V-shaped groove outer layer 1, inner layer 2 and whitening gel layer 3 in the middle layer.
[0168] The outer layer 1 and the inner layer 2 are a conjoined structure bent into a V-shaped groove 4, and its material is a transparent polyethylene plastic film or a film of materials such as silica gel, aluminum foil, fabric, and wax, and the thickness of the material is less than 0.5 mm. The top is impermeable or rarely permeable, and can be a layer or multi-layer overlapping structure.
[0169] The middle layer whitening gel layer 3 is a soft film made of tooth whitening material, its thickness is less than 0.1 mm, and it is close to the inner wall of the outer layer 1. The tooth whitening material has multiple formulas for implementation, and its formula A is:
[0170] Carbamide peroxide 18%
[0171] E...
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