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.
So, how many teeth do children have? Baby Teeth. Children begin teething around six months of age. The technical term for these early teeth is deciduous teeth, because they eventually fall out, just as leaves fall of from deciduous trees in autumn. Most people know these teeth as baby teeth, though they are also sometimes called milk teeth or primary teeth. In all, children have 20 baby teeth - 10 on the top and 10 on the bottom.