Sir, Stagnell and Burrows report a case of 'cojoined [sic] cementoma' affecting the maxillary central and lateral incisors (BDJ 2013; 215: 267). The racial origin of the patient, presence or absence of Paget's disease of bone and the vitality status of the affected teeth are not specified. 'Cementoma' is not recognised by the World Health Organisation in its latest classification of odontogenic tumours1 and the maxillary incisors are very unusual sites for any of the cementogenic entities it currently lists. The case in point is likely to represent exuberant hypercementosis associated with non-vital, functionless teeth, ie a reactive rather than neoplastic process which was the result of long-term periapical inflammation. However, the history of oral bisphosphonate therapy is intriguing. One might speculate on its role in producing the pathological changes which, in turn, caused the surgical difficulties described and it is unfortunate histological data were also not included.