1. Nair P.N. Pathogenesis of apical periodontitis and the causes of endodontic failures. Crit Rev Oral Biol Med. 2004;15(6):348–381. https://doi.org/10.1177/154411130401500604

2. Segura-Egea J.J., Martín-González J., Castellanos-Cosano L. Endodontic medicine: connections between apical periodontitis and systemic diseases. Int Endod J. 2015;48(10):933–951. https://doi.org/10.1111/iej.12507

3. Sorsa T., Tjäderhane L., Konttinen Y.T., Lauhio A., Salo T., Lee H.M et al. Matrix metalloproteinases: contribution to pathogenesis, diagnosis and treatment of periodontal inflammation. Ann Med. 2006;38(5):306–321. https://doi.org/10.1080/07853890600800103

4. Kawashima N., Stashenko P. Expression of bone-resorptive and regulatory cytokines in murine periapical inflammation. Arch Oral Biol. 1999;44(1):55–66. https://doi.org/10.1016/s0003-9969(98)00094-6

5. Prada I., Micó-Muñoz P., Giner-Lluesma T., Micó-Martínez P., Collado-Castellano N., Manzano-Saiz A. Influence of microbiology on endodontic failure. Literature review. Med Oral Patol Oral Cir Bucal. 2019;24(3):e364–e372. https://doi.org/10.4317/medoral.22907

6. Poornima P., Subba Reddy V.V. Comparison of digital radiography, decalcification, and histologic sectioning in the detection of accessory canals in furcation areas of human primary molars. J Indian Soc Pedod Prev Dent. 2008;26(2):49–52. https://doi.org/10.4103/0970-4388.41615

7. Anderegg A.L., Hajdarevic D., Wolf T.G. Interradicular canals in 213 mandibular and 235 maxillary molars by means of micro-computed tomographic analysis: an ex vivo study. J Endod. 2022;48(2):234–239. https://doi.org/10.1016/j.joen.2021.11.015 (Erratum in: J Endod. 2022;48(9):1200. https://doi.org/10.1016/j.joen.2022.06.012).

8. Ahmed H.M.A., Neelakantan P., Dummer P.M.H. A new system for classifying accessory canal morphology. Int Endod J. 2018;51(2):164–176. https://doi.org/10.1111/iej.12800

9. Wolf T.G., Wentaschek S., Wierichs R.J., Briseño-Marroquín B. Interradicular root canals in mandibular first molars: a literature review and ex vivo study. J Endod. 2019;45(2):129–135. https://doi.org/10.1016/j.joen.2018.10.019

10. Perlich M.A., Reader A., Foreman D.W. A scanning electron microscopic investigation of accessory foramens on the pulpal floor of human molars. J Endod. 1981;7(9):402–406. https://doi.org/10.1016/S0099-2399(81)80038-6

11. Chouchi D., Berberoglu A., Orhan K., Etikan I., Tümer H., Bagis N. The location and incidence of patent accessory pulpal canals in permanent molars with periodontal lesion by using micro-computed tomography. J Med Imaging Health Inform. 2021;11(1):85–88. https://doi.org/10.1166/jmihi.2021.3274

12. Huamán S.D., Brito Aragão M.G., Dias Moreno A.P., Mussolino de Queiroz A., Bezerra da Silva R.A., Garcia de Paula-Silva F.W., Bezerra da Silva L.A. Accuracy of conventional periapical radiography in diagnosing furcation repair after perforation treatment. J Endod. 2020;46(6):827–831. https://doi.org/10.1016/j.joen.2020.03.004

13. Zhang W., Foss K., Wang B.Y. A retrospective study on molar furcation assessment via clinical detection, intraoral radiography and cone beam computed tomography. BMC Oral Health. 2018;18(1):75. https://doi.org/10.1186/s12903-018-0544-0

14. Gusmão E.S., Picarte A.C, Ben Barbosa M.B., Rösing C.K., Cimoes R. Correlation between clinical and radiographic findings on the occurrence of furcation involvement in patients with periodontitis. Indian J Dent Res. 2014;25(5):572–575. https://doi.org/10.4103/0970-9290.147086

15. Gautam S., Galgali S.R., Sheethal H.S., Priya N.S. Pulpal changes associated with advanced periodontal disease: A histopathological study. J Oral Maxillofac Pathol. 2017;21(1):58–63. https://doi.org/10.4103/0973-029X.203795

16. Weinberg E.M., Pereda A.E., Khurana S., Lotlikar P.P., Falcon C., Hirschberg C. Incidence of middle mesial canals based on distance between mesial canal orifices in mandibular molars: a clinical and cone-beam computed tomographic analysis. J Endod. 2020;46(1):40–43. https://doi.org/10.1016/j.joen.2019.10.017

17. Shenoi P.R., Morey E.S., Makade C.S., Gunwal M.K., Khode R.T., Wanmali S.S. In vitro evaluation of the antimicrobial efficacy of chitosan and other endodontic irrigants against Enterococcus faecalis. Gen Dent. 2016;64(5):60–63.

18. Guo X., Miao H., Li L., Zhang S., Zhou D., Lu Y., Wu L. Efficacy of four different irrigation techniques combined with 60°C 3% sodium hypochlorite and 17% EDTA in smear layer removal. BMC Oral Health. 2014;14:114. https://doi.org/10.1186/1472-6831-14-114

19. Rico-Romano C., Zubizarreta-Macho Á., Baquero-Artigao M.R., Mena-Álvarez J. An analysis in vivo of intracanal bacterial load before and after chemo-mechanical preparation: A comparative analysis of two irrigants and two activation techniques. J Clin Exp Dent. 2016;8(1):e9–e13. https://doi.org/10.4317/jced.52585

20. Al-Jadaa A., Paqué F., Attin T., Zehnder M. Necrotic pulp tissue dissolution by passive ultrasonic irrigation in simulated accessory canals: impact of canal location and angulation. Int Endod J. 2009;42(1):59–65. https://doi.org/10.1111/j.1365-2591.2008.01497.x