This study focused on five unusual cases with anomalous eruptions of the maxillary
second premolars that related to late development of the germs. In four cases, the
affected premolars erupted between the ages of 12y3m and 14y6m. In one case, which
was suspected to include bilateral anomalies, the eruption of the premolar was excessively
late, continuing up to 17y8m old. It was surmised that the degree of tooth formation
in the contralateral side might help to predict approximately at what age the late
premolars will erupt.