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.
Permanent teeth are the set of teeth that we get after the age of 6 years and serve us for the rest of our lives. We have 32 permanent teeth, 16 at each jaw, which are also known as secondary or adult teeth. They form the permanent dentition which is fully completed much later at the age of 17-21 years with the eruption of the third molars (wisdom teeth).