Table 3.

Characteristics of the included studies: objective(s) of interest

Studies	Canal morphology (3D and/or 2D)	Apical morphology	Accessory canals	Isthmuses	Dentine thickness	Root morphology	Pulp chamber	MMCs
1. Mannocci et al. [47]				✓
2. Iwaka et al. [48]							✓
3. Gu et al. [49]				✓
4. Gu et al. [12]	✓		✓				✓
5. Gu et al. [50]	✓
6. Fan et al. [51]				✓
7. Harris et al. [52]	✓		✓	✓	✓		✓
8. Filpo-Perez et al. [5]	✓
9. Lamia & McDonald [53]	✓
10. Lee et al. [54]	✓				✓
11. Gu et al. [55]						✓
12. Versiani et al. [22]		✓
13. Versiani et al. [56]							✓	✓
14. Wolf et al. [57]	✓	✓	✓
15. Gu et al. [58]						✓
16. Keles & Keskin [59]	✓
17. Keles & Keskin [26]								✓
18. Moe [60]	✓		✓	✓			✓	✓
19. Wolf [61]		✓
20. Keles & Keskin [62]		✓
21. Keles & Keskin [63]				✓
22. Theye et al. [64]						✓
23. Tomaszewska et al. [4]	✓
24. Marceliano-Alves et al. [7]	✓		✓	✓
25. Arfianti et al. [65]	✓
26. Asijavičienė et al. [66]		✓	✓	✓
27. Keles et al. [24]		✓	✓	✓	✓			✓
28. Mazzi-Chaves et al. [67]	✓
29. De-Deus et al. [11]					✓	✓	✓
30. Fu et al. [36]	✓