Analysis of Cause of Endodontic Failure of C-Shaped Root Canals

Figure 2

Classification of C-shaped canal configuration using cone-beam computed tomography. (a) C1 configuration at coronal level. (b) C2 configuration at coronal level. (c) C3 configuration at coronal level. (d) C4 configuration at coronal level. (e) C1 configuration at apical 3 mm level. (f) C2 configuration at apical 3 mm level. (g) C3 configuration at apical 3 mm level. (h) C4 configuration at apical 3 mm level.

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