Radiance brackets are made from single-crystal, pure grown sapphire, the second hardest mineral on Earth. Once bonded, Radiance is nearly invisible on the tooth. Monocrystalline formation gives Radiance a solid core structure, as opposed to the strand structure of polycrystalline. A heat treatment seals the bracket and ensures that no fissures exist on its surface. Radiance features tie wings on its base, which are designed with a smooth radius to reduce fracture. The under tie-wing space is enlarged for easy and quick ligation. The patented Quad-Matte™ base features a strong bond in the center to hold the bracket in place, but a weaker bond on the edges to allow for easy and predictable debonding.