Whitening works on the majority of teeth. For any nominal stains on regular teeth, in-office bleaching is a great option. However, some teeth will not benefit from whitening. These include those that have been covered in veneers or crowns and those that are deeply stained or pitted. With a close examination, your dentist can advise whether your teeth would benefit from in-office bleaching. For some patients, the best option is to invest in porcelain veneers that cover the stained teeth with natural and beautiful, stain-resistant porcelain.