The EPIC dental laser, on the other hand, has been shown to whiten as many as 4-6 shades in an average of twenty minutes in a dental clinic, (not including set-up or take-down).* The EPIC dental laser whitening system from BIOLASE uses a special handpiece to disperse laser light over a broad area of teeth. Rather than the James Bond-style lasers many people think of, EPIC uses a diffused laser light to whiten teeth.