How would a wider dental arch change my appearance?

Veneers on a single arch are actually very common. This is usually because most of the desired corrections are done in the more visible part of the mouth, which is usually the upper front teeth. From a functional perspective, the front and incisal surfaces of the upper front teeth are not as heavily loaded during chewing as that of the lower front teeth. This is why most veneer cases usually do not include the lower incisors.

Some patients may just want straight teeth and are not concerned with the proportions of the teeth or the colour. A harmonious smile has optimal aesthetics in: tooth size, position, proportions, shape and colour. Some patients like a very obvious "done" look with very white and straight teeth with little variation in tooth form. They may feel that it is not worth spending so much on their teeth if people cannot tell at first glance what they have spent their money on. Other patients may prefer subtle aesthetics that is hyper-natural but "perfected".