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.
Tooth Eruption Chart. Permanent Teeth. Permanent teeth usually begin to appear (erupt) around the age of six years. By age 21, all 32 permanent teeth have usually erupted. The chart below identifies the types of permanent teeth and their usual eruption dates. Flag Status: Full Staff.