Specification: Type: Light Curing Composite Resin Shage: A1 A2 A3 Net Weight: 2.5g Color: As shown Package includes: 1PC A1/A2/A3 Features: 1. Low polymerization shrinkage. 2. High strength and polishability. 3. Similar modulus of elasticity to dentin. 4. Radiopaque and fluoride releasing, optimum polishability and high color stability. 5. Easy to shape. 6. Easy to bond to orthodontic bracket. 7. Simple and convenient to use. 8. Used for all kinds of cavity preparation. Usage: 1. Prepare cavities according to conventional requirements, remove decayed tissue and clean cavities. 2. Apply a pre-treatment agent for dental composite resin (etching agent) to the tooth surface to be bonded, rinse and blow-dry the bonding surface. 3. Apply an even and thin layer of dental composite resin pretreatment agent (bonding agent) to the bonding surface and illuminate with a dental light curing lamp for 20 seconds. 4. After filling and cutting with an appropriate amount of composite, the light intensity should not be less than 400 mW/cm2. The light source is irradiated for 20 seconds to solidify. Curing depth 1.5 mm. For large filling depth, the irradiation time can be extended appropriately or a layered solidification filling can be performed. 5. Carry out trimming and polishing and inspect with dental paper before trimming. It is recommended to use rubber polishing wheels and ultra-fine abrasive strips. 6. Recommended use of pulp protection and cushioning materials: calcium hydroxide (light-cured or chemically cured) or other non-oily cushioning materials. Do not use materials containing eugenol directly as a base.