Effective methods of teeth whitening include whitening toothpastes, rinses, strips, trays and over-the-counter gels, according to WebMD. Individuals can also use bleaching products that contain peroxide or visit a dentist for professional bleaching, explains the American Dental Association.
Whitening toothpastes or dentifrices contain mild abrasives that remove surface stains, states WebMD. They also contain chemical agents that polish the teeth. Over-the-counter whitening methods such as strips and gels often contain carbamide peroxide, which bleaches the teeth, claims the American Dental Association. Professional in-office bleaching is a method that uses heat, a laser or special light, sometimes in conjunction with hydrogen peroxide, to whiten the teeth in 30 to 60 minutes. In-office bleaching methods have the most dramatic results but are also the most expensive.