People who are generally dissatisfied with their current teeth or are very conscious about smiling. 

Some general conditions are:

1) Spaces between teeth aka diastema.

2) Broken or chipped teeth.

3) Stained teeth as in Fluorosis or Dsyplasia.

4) Small teeth.

5) Poorly shaped teeth.

How is it done?

There are various ways by which we do this:

1) Veneers.

2) Crowns.

3) Bridges.

All of them have their advantages and disadvantages and there is no one for all fit. You will be explained what is best for you.