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. 2022 May 10;22:171. doi: 10.1186/s12903-022-02187-1

Fig. 2.

Fig. 2

New classification system for root canal morphology of mandibular right central incisor classified using the new classification system, described as code 1411. The code consists of three components, the tooth number—black color arrow, number of roots—green color arrow and the root canal configuration—blue color arrow. The number of roots is added as a superscript before the tooth number, so it is single root and tooth number (41). Description of root canal configuration is written as superscript after the tooth number on the course of the root canal starting from the orifices [O], passing through the canal [C], ending by the foramen [F], so it is single canal