When a person spikes the volleyball hard from the other team (or side), a person from the team opposite of the one who just spiked will block the ball and keep it off their si â¦ de.
Tooth decay is the destruction of your tooth enamel, the hard, outer layer of your teeth. It can be a problem for children, teens and adults. Plaque, a sticky film of bacteria, constantly forms on your teeth.
The terms dental caries, tooth decay and cavity all refer to the same thing and can be used interchangeably. It's pretty easy to see why the term cavity, which means a hole, has come into usage. The same can be said for the term decay, which makes reference to the destructive (decaying) aspect of this disease.