Three-dimensional modeling and measurements of root canal anatomy in second primary mandibular molars: a case series micro CT study

Purpose This study aimed at establishing a comprehensive specification of the root canal anatomy of second primary mandibular molars using micro computed tomography (CT). Methods 10 s primary molars from Caucasian young patients were selected for this purpose. Micro CT imaging with a high resolution of 20 microns was performed to observe the roots and canals according to specific criteria. The Vertucci canal configuration, the presence of lateral canals and their location, the presence of an isthmus and its location, were first observed. Then, the length of the canals, their diameter in the mesio-distal and vestibulo-lingual direction, the dentinal thickness and the direction of the minimal dentinal thickness were measured. Results The mean working length was not significantly different between the canals ( p = 0.710). The bucco-lingual diameter was significantly higher when the tooth had a single distal canal at the coronal ( p