When disc brakes for high performance cars arrived on the scene we began to hear of warped brake discs on road going cars, with the same analyses and diagnoses. Typically, the discs are resurfaced to cure the problem and, equally typically, after a relatively short time the roughness or vibration comes back.
As a result, the cheek teeth, like the incisors, have evolved to continuously grow throughout life. In other rodents, the diet of tubers, seeds, and grain requires little chewing, resulting in little wear of the cheek teeth.
With rabbits, the teeth continue to grow for the life of the pet, so they are constantly being worn down and the teeth are being renewed. This type of tooth is called open-rooted, meaning that it is continually growing. It is for this reason that the teeth do not need to be brushed.