the tooth enamel has eroded, leaving your tooth sensitive and vulnerable for bacteria to creep into your teeth, especially if it is your back molars. The bacteria will get into your tooth and cause decay, thus, a cavity.
Because they dont fit or are worn out.
they got worn out..
You might do that until the anaestethic has worn off completely.
the cavity filled with grains of sand or clay.
Soil is worn away - erosion - by the elements wind and water.
by erosion
When its worn away...its called erosion
It was worn away through wind and water erosion.
When something has "worn off", it has gone away. For example, when you go to the dentist and he gives you some anesthesia, it eventually goes away. By the next day, the numbness has worn off.
It gets tossed away after clothes are put on... Ugh must be scary It gets tossed into the laundry to be re-worn by you.
Erosion
The scarf was very worn out, so I had to throw it out. OR The scarf was very worn, so I threw it away. ***you don't have to say worn out, you can just say worn, but either works.