1. Different materials: steel bracket is metal-based bracket, made of metal casting; while the rubber bracket is resin-based bracket, i.e. made of plastic.
2. Different strengths: steel brackets are stronger, more accurate and less prone to breakage, while the strength of rubber brackets is relatively low.
3. Different colour and lustre: although the resin colour of adhesive trays is close to the colour of the gums and the colour is similar to the mucous membrane, which is more beautiful, steel trays, due to their metal material, may not be as close to natural as adhesive trays in terms of colour and lustre.
4. The use of different feelings: steel tray is thinner and delicate, less foreign body feeling, better comfort, easy to clean, and better conductivity to the temperature, not easy to burn; while the gum tray has a certain thickness, oral foreign body feeling is stronger, easy to aging and wear, and not easy to clean. In addition, the rubber tray is also a poor conductor of heat, which may lead to overheating food burns oral mucosa.
5. Other factors: steel bracket is more expensive, relatively complex production process, repair and replenishment is more difficult, and can not be relined; while the rubber bracket is cheaper, production equipment, operation is more simple, easy to repair and relining of dentures.