Why does the glue on your braces turn blue?

The glue on braces often turns blue due to the addition of a color-changing agent, typically a dye, which helps orthodontists visually confirm that the adhesive has properly cured. This color change can also serve as an indicator for patients, ensuring they know when the adhesive is set and ready for use. Additionally, the blue color can aid in the detection of any leftover adhesive during the removal process.