If the teeth are actually small, compared to the size of the mouth and face, they appear small. Another reason is if the gingiva are showing too much, partially covering the teeth as we call a "gummy smile".
If the reason of the unwanted appearence of a small smile is the size of the teeth, then "bonding", also known as "composite veneers" can be the solution. The teeth can be made bigger with composites, the space between the teeth can be closed. Bonding treatment may be followed with porcelain veneer treatment after many years of usage.
If a gummy smile is causing the discomfort in the smile, and if the gingiva are partially covering the teeth, pink aesthetics can be applied. With the help of a dental laser or an electroter, excessive gingiva covering the teeth may be removed, the tooth size may be enlarged and the gummy smile can be reduced.
4 incisors in the front is the same size allows the expression of the patient's teeth is worn. In particular knack front two incisors is an important extension of the aesthetic creation of a smile.