There are many treatment options available depending on the cause of the spacing and personal wishes of the individual. The first step is to consider if the spaces are to be closed or opened with orthodontics so that the small teeth can be restoratively built up by your dentist. Slightly small upper lateral incisors are very common and can result in mild spacing in the upper incisor area. In many cases, the lower incisors teeth are slight narrowed by polishing, so that the upper incisors can be moved back and spaces closed. On the other hand, If the lateral incisors are very small, i.e. peg, then spaces should be prepared to accommodate restorative build ups (this can be composite resin, porcelain veneers etc.).