Dental staining can be an embarrassing problem that can severely degrade the beauty of your smile. Despite staining being a common issue for dental patients, there are many pieces of misinformation that can make it hard for individuals to effectively protect their teeth against the deterioration that staining can cause. Myth: It Is Impossible To Lighten Deep Stains Over time, it can be possible for dental stains to occur deep within the enamel of the teeth.