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.
The Serrated Bumps on the Permanent Incisors Are Mamelons. All teeth develop from what are called lobes. Deep down under the gums, the different lobes all grow together, each one forming a different part of the tooth. On the front teeth, the incisors, there are three lobes that come together to form the front of the tooth.