Integrity - A1 Refill - Temporary Crown and Bridge Material: 1 - 76 Gm. Twin-Port Cartridge and 20 Small Mixing Tips. The original, award-winning Integrity Temporary Crown & Bridge Material is a twin-port cartridge and dispensing system for fast, strong, aesthetic temporaries. It provides the perfect mix ratio with no cross contamination. Integrity Material provides minimal shrinkage, great consistency, and polishes to a natural luster.