OPTION 1

֍ LED lamps emit cold blue light with a wavelength of around 465 nm, which allows activation of hydrogen peroxide gels and accelerates the bleaching process.
֍ LED lights are placed close to the patient’s teeth for 15- to 20-minute treatments, which may have to be repeated up to three times.
֍ Cosmetic specialists with no dental background have adopted this method of bleaching because it offers low risk, as no heat activation is involved.
֍ Green LED lights demonstrated the lowest intrapulpal temperature increase compared to conventional halogen, hybrid lights with or without a laser component, or high-intensity LED lights.
However, a systematic review investigating the influence of the light source on pulpal responses during bleaching procedures concluded that there was not sufficient evidence to extrapolate the true human situation.
⸙ KEY CONCEPT:     
֍ LED lamps emit cold blue light with a wavelength of around 465 nm, which allows activation of hydrogen peroxide gels and accelerates the bleaching process.