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.
By 12 months babies usually have 4 to 8 teeth. By 18 months 12 teeth and by 3 years all 20 baby teeth will generally be in place. Baby teeth will be lost between the ages of 6 and 12 years to make way for permanent teeth (also called adult teeth). Teeth generally appear in a certain order.