There are different types of teeth staining. Yellowish stains are more likely to respond to whitening. If the stains are brown, gray, or result from tooth trauma, they are less likely to benefit from teeth whitening services. However, if the stain is due to a trauma and you already had a root canal treatment an “internal whitening” procedure could be used to match the color of that particular tooth with the adjacent teeth. If you are unsure if your teeth would benefit from whitening, speak to your dental hygienist to discuss your treatment options.