Abstract: The eruption of the molar teeth represents the start and end of the establishment of the permanent dentition. This process often occurs without event, but occasionally abnormalities of eruption occur and most frequently this affects the third molar. This article gives an overview of the possible aetiology, diagnosis and treatment of the aberrant molar. CPD/Clinical Relevance: Awareness of the possible sequelae of unerupted or impacted molars is important in diagnosis and treatment planning.