The most commonly affected tooth in microdontia is the maxillary lateral incisor, which is located on the upper jaw. This is due to the fact that the lateral incisors are typically the smallest teeth in the mouth, making them more vulnerable to irregularities in tooth development. Other teeth that may be affected include the maxillary central incisors, mandibular incisors, and premolars. Additionally, microdontia can affect multiple teeth at once, and can also occur on one side of the mouth. Treatment for microdontia usually involves orthodontic treatment, such as braces, which can help to reposition the teeth and restore a more normal appearance. In severe cases, dental implants or crowns may be necessary to replace the affected teeth.