Concrescence: assessment of case by periapical radiography, cone beam computed tomography and micro-computed tomography.

The New York state dental journal

PubMedID: 24933768

Neves FS, Rovaris K, Oliveira ML, Novaes PD, de Freitas DQ. Concrescence: assessment of case by periapical radiography, cone beam computed tomography and micro-computed tomography. N Y State Dent J. 2014;80(3):21-3.
The aim of this article was to describe imaging aspects of concrescence analyzed by three imaging modalities. A second molar joined together with a third molar was imaged using digital periapical radiography, cone beam computed tomography (CBCT) and micro-computed tomography (Micro-CT). On periapical radiograph, the mesial root of the third molar is superimposed on the distal root of the second molar. On CBCT images, a large cementum union between bulbous roots was detected, confirming the diagnosis of concrescence. On micro-CT images, the cementum union appeared limited to the apical third of the roots. In conclusion, both computed tomography modalities allowed for the diagnosis of concrescence. However, only micro-CT provided the real extension of the cementum union.