This is a difficult question to answer because there are so many aspects to an aesthetic smile makeover other than just colour. Your dentist will have to correct the shape and the inclination of the teeth, and ensure that the natural spaces between each tooth is either preserved or enhanced, not encroached.
Our eyes can pick up imbalances and appearance that do not harmonise like nature do. In this picture, the teeth looked too bulky and the angle of the inclination is wrong. The white is too stark and opaque. It's too monotone and not three-dimensional enough. The shape of the teeth are also too rounded at all corners.
In order for us to achieve a beautiful smile, we must analyse all aspects of the current smile that we can enhance. All the smile parameters should be analysed, for example: the length of the teeth, the colour, the angulation of the teeth in general, the shape as well as the level of the gums.
We also look into the fullness of the smile to see if there is anything we can improve. Essentially, we look into the ABC - A (Alignment), B (Brightness) and C (Contours) of the smile. All these enhancement of the smile need to be balanced with the biological cost of trimming the teeth.
A lot of times, we move the teeth before doing veneers trimming so that we can trim less to get the desired smile.
I hope this gives you an insight to how we analyse a person's smile before we recommend the smile makeover procedures required.
