To examine the extent to which orthodontists consider it appropriate to refer post-orthodontic patients for lower third molar treatment. The subjects were 10 orthodontists from hospital, specialist practice and community setting. Participants were presented with 15 case histories of orthodontic patients (including full records) and asked to state whether they would have referred the case to an oral surgeon for management of their third molars. Data were analysed using multi-kappa measure. Two-hundred-and-sixty-two decisions of 300 (88%) were not to refer cases for third molar management. Little consensus was seen between orthodontists on which post-orthodontic cases referral (kappa = 0.14). Some clinicians referred cases much more frequently than others (Kruskall-Wallis = 46.84, P < 0.001) and some clinicians referred much more frequently (Kruskall-Wallis = 85.57, P < 0.001). This group of orthodontists did not refer post-orthodontic cases for third molar management and little consensus was observed regarding which cases did warrant removal.