Question

During bleaching, light emitted from LED lamp is:

• A. Cold blue visible light 465 nm
• B. Hot blue visible light 465 nm
• C. Cold orange visible light 465 nm
• D. Cold green visible light 465 nm

Hint:

Cold blue light with a wavelength of 465 nm is commonly used in dental bleaching to activate the bleaching agents without causing heat-related discomfort.

Answer 1

The Correct Option is A

During bleaching, the light emitted from an LED lamp is typically a cold blue visible light with a wavelength of 485 nm. The blue light activates the bleaching agent, typically hydrogen peroxide or carbamide peroxide, which then releases oxygen ions that penetrate the enamel and dentin to break down the chromophores and lighten the tooth. The cold blue light emitted by the LED lamp does not produce significant heat, which helps to minimize discomfort or sensitivity during the bleaching process. The specific wavelength of the blue light emitted by the LED lamp can vary depending on the manufacturer or the specific device, but 465 nm is a common wavelength used in dental bleaching systems.