{Reference Type}: Case Reports {Title}: Adenomatoid odontogenic tumour: A rare threat to orthodontic treatment planning. {Author}: Han L;Downing A;Farr D;Dasgupta K;Stewart D; {Journal}: J Orthod {Volume}: 46 {Issue}: 3 {Year}: 09 2019 暂无{DOI}: 10.1177/1465312519856357 {Abstract}: This case report aims to increase awareness of how an adenomatoid odontogenic tumour (AOT) can present in a similar fashion to a dentigerous cyst and the importance of accurate histopathological diagnosis. In this case, the AOT resulted in loss of the upper left permanent canine in a patient who already had a congenitally absent upper left second premolar, compromising the original orthodontic treatment plan.