With the desire for pearly-white teeth being prevalent in many cultures, achieving this through basic brushing alone can be challenging as teeth easily stain. As a solution, numerous companies have introduced a variety of teeth-whitening products, while similar procedures have become increasingly popular in cosmetic dentistry. It is estimated that over 100 million Americans opt for some form of teeth whitening annually. However, the effectiveness of these methods varies significantly, and it is important to note that certain techniques may have potential risks and adverse effects.
Understanding the Staining Process
There are two main processes that can cause teeth to become stained: extrinsic and intrinsic discoloration. Extrinsic discoloration occurs when foods, beverages, or other external factors stain the surface of the teeth. On the other hand, intrinsic discoloration happens when something within the tooth itself causes the discoloration.
It is important to note that each type of discoloration requires a unique whitening method. However, most whitening processes involve the use of the same whitening agents, such as hydrogen peroxide or carbamide peroxide. These agents work by diffusing into the teeth and releasing free radicals. These free radicals then attach to the pigment molecules, causing them to reflect less light and appear whiter.
What sets different whitening methods apart is the materials they use to clean the teeth. Each method utilizes specific materials that are tailored to effectively remove stains and restore the natural whiteness of the teeth.
History
Throughout history, people have been obsessed with finding ways to achieve whiter teeth. This quest for a brighter smile can be traced back thousands of years, with even ancient Egyptians considering white teeth as a symbol of wealth and status. However, one of the most peculiar methods of teeth whitening can be credited to the Ancient Romans.
Believe it or not, the Romans discovered that urine had the power to remove tough stains from their laundry. Intriguingly, they began to apply this unique substance to their teeth in an attempt to whiten them. Moving forward to the 17th century, barbers took on the task of teeth whitening. They would file down dirty tooth enamel and then apply acid, hoping to achieve a whiter appearance.
The late 1920s saw the rise in popularity of whitening mouthwashes as a means to brighten teeth. However, it wasn’t until almost four decades later when Dr. William Klusmeier introduced custom tray bleaching that teeth whitening took a significant leap forward. This method, which involves the use of custom trays to apply bleaching agents, has become one of the more widely used techniques for teeth whitening today.