Comparison of continuous wave and cold lateral condensation filling techniques in 3D printed simulated C-shape canals instrumented with Reciproc Blue or Hyflex EDM

English version

Autoři: Anıl Özgün Karatekin ^aff001; Ali Keleş ^aff002; Nimet Gençoğlu ^aff001
Působiště autorů: Department of Endodontics, Faculty of Dentsity, Marmara University, Istanbul, Turkey ^aff001; Department of Endodontics, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey ^aff002
Vyšlo v časopise: PLoS ONE 14(11)
Kategorie: Research Article
prolekare.web.journal.doi_sk: https://doi.org/10.1371/journal.pone.0224793

Souhrn

Aim

To compare the efficiency of continuous wave obturation and cold lateral condensation techniques and filling time in C-shape canals of 3-dimensional (3D)-printed resin teeth shaped with Reciproc Blue (VDW) or Hyflex EDM (Coltene/Whaledent).

Methodology

One tooth with C1-type orifice and root canal morphology and one with C2-type orifice and C2-C3 root canal morphology were selected based on CBCT. Two replicas of selected teeth were manufactured with a 3D-printer and their canals were instrumented with Reciproc Blue or Hyflex EDM. These 4 instrumented replicas were scanned with CBCT. Identical 10 replicas of each group (total of 40) were produced using a 3D-printer and randomly divided into 2 groups (n = 5), root filled with either continuous wave obturation (CW) or cold lateral condensation (LC). Horizontal cross-sections of C1-type were made at 2, 4, 6, 8 mm and C2-type at 2, 4, 6 mm from the apical foramen. Gutta-percha, sealer and void areas were evaluated with image analysis sofware. Data were analysed using nonparametric Kruskal-Wallis and Mann Whitney-U tests and the Factorial ANOVA was used for interaction effects. Time required to fill canals was evaluated using the Mann-Whitney U test.

Results

For C1-type, LC had more gutta-percha and less sealer compared to CW in 2-mm sections (p<0.05). CW had greater percentages of gutta-percha and lower percentages of sealer compared with LC group in 4, 6, 8 mm sections and total area (p<0.05). LC group had higher percentages of voids compared to CW group in 2 and 4 mm sections (p<0.05). For C2-type, CW had more gutta-percha and less sealer versus LC group in all sections and total area (p<0.05). LC had the least gutta-percha and greatest sealer percentages at 6-mm sections (p<0.05). There was no statistically significant difference in the percentages of voids at any level of sections between the filling techniques (p>0.05). In both C-types, there was no significant difference in the percentages of gutta-percha, sealer and voids between Reciproc Blue and Hyflex EDM-shaped groups at any level (p>0.05). Time spent for the LC technique and filling C1-type was significantly longer than when using the CW technique and filling C2-type (p<0.05).

Conclusions

Continuous wave obturation was more effective than lateral condensation in both C1- and C2-type, except for the apical 2 mm section of C1-type, suggesting the need for a modified CW technique.

Klíčová slova:

3D printing – Teeth – Instrumentation – Dentition – Molars – Test statistics – Canals – Condensation

Zdroje

1. Cooke HG 3rd, Cox FL. C-shaped canal configurations in mandibular molars. Journal of American Dental Association. 1979;99(5):836–9. Epub 1979/11/01. doi: 10.14219/jada.archive.1979.0402 290680.

2. Manning SA. Root canal anatomy of mandibular second molars. Part II. C-shaped canals. International Endodontics Journal. 1990;23(1):40–5. Epub 1990/01/01. doi: 10.1111/j.1365-2591.1990.tb00801.x 2391180.

3. Baisden MK, Kulild JC, Weller RN. Root canal configuration of the mandibular first premolar. Journal of Endodontics. 1992;18(10):505–8. Epub 1992/10/01. doi: 10.1016/S0099-2399(06)81352-X 1289476.

4. Bolger WL, Schindler WG. A mandibular first molar with a C-shaped root configuration. Journal of Endodontics. 1988;14(10):515–9. Epub 1988/10/01. doi: 10.1016/S0099-2399(88)80110-9 3255779.

5. De Moor RJ. C-shaped root canal configuration in maxillary first molars. International Endodontic Journal. 2002;35(2):200–8. Epub 2002/05/22. doi: 10.1046/j.1365-2591.2002.00461.x 12019491.

6. Lu TY, Yang SF, Pai SF. Complicated root canal morphology of mandibular first premolar in a Chinese population using the cross section method. Journal of Endodontics. 2006;32(10):932–6. Epub 2006/09/20. doi: 10.1016/j.joen.2006.04.008 16982267.

7. Yang ZP, Yang SF, Lee G. The root and root canal anatomy of maxillary molars in a Chinese population. Endodontics & Dental Traumatology. 1988;4(5):215–8. Epub 1988/10/01. doi: 10.1111/j.1600-9657.1988.tb00324.x 3248579.

8. Al-Fouzan KS. C-shaped root canals in mandibular second molars in a Saudi Arabian population. International Endodontic Journal. 2002;35(6):499–504. Epub 2002/08/23. doi: 10.1046/j.1365-2591.2002.00512.x 12190906.

9. Haddad GY, Nehme WB, Ounsi HF. Diagnosis, classification, and frequency of C-shaped canals in mandibular second molars in the Lebanese population. Journal of Endodontics. 1999;25(4):268–71. Epub 1999/07/30. doi: 10.1016/S0099-2399(99)80157-5 10425954.

10. Weine FS, Hayami S, Hata G, Toda T. Canal configuration of the mesiobuccal root of the maxillary first molar of a Japanese sub-population. International Endodontic Journal. 1999;32(2):79–87. Epub 1999/06/18. doi: 10.1046/j.1365-2591.1999.00186.x 10371900.

11. Zheng Q, Zhang L, Zhou X, Wang Q, Wang Y, Tang L, et al. C-shaped root canal system in mandibular second molars in a Chinese population evaluated by cone-beam computed tomography. International Endodontic Journal. 2011;44(9):857–62. Epub 2011/05/24. doi: 10.1111/j.1365-2591.2011.01896.x 21599707.

12. Jin GC, Lee SJ, Roh BD. Anatomical study of C-shaped canals in mandibular second molars by analysis of computed tomography. Journal of Endodontics. 2006;32(1):10–3. Epub 2006/01/18. doi: 10.1016/j.joen.2005.10.007 16410060.

13. Seo MS, Park DS. C-shaped root canals of mandibular second molars in a Korean population: clinical observation and in vitro analysis. International Endodontic Journal. 2004;37(2):139–44. Epub 2004/02/12. doi: 10.1111/j.0143-2885.2004.00772.x 14871181.

14. Cimilli H, Cimilli T, Mumcu G, Kartal N, Wesselink P. Spiral computed tomographic demonstration of C-shaped canals in mandibular second molars. Dentomaxillofacial Radiology. 2005;34(3):164–7. Epub 2005/05/18. doi: 10.1259/dmfr/64778606 15897287.

15. Helvacioglu-Yigit D, Sinanoglu A. Use of cone-beam computed tomography to evaluate C-shaped root canal systems in mandibular second molars in a Turkish subpopulation: a retrospective study. International Endodontic Journal. 2013;46(11):1032–8. Epub 2013/03/26. doi: 10.1111/iej.12094 23521079.

16. Sert S, Aslanalp V, Tanalp J. Investigation of the root canal configurations of mandibular permanent teeth in the Turkish population. International Endodontic Journal. 2004;37(7):494–9. Epub 2004/06/11. doi: 10.1111/j.1365-2591.2004.00837.x 15189440.

17. Melton DC, Krell KV, Fuller MW. Anatomical and histological features of C-shaped canals in mandibular second molars. Journal of Endodontics. 1991;17(8):384–8. Epub 1991/08/01. doi: 10.1016/S0099-2399(06)81990-4 1809802.

18. Fan B, Cheung GS, Fan M, Gutmann JL, Bian Z. C-shaped canal system in mandibular second molars: Part I—Anatomical features. Journal of Endodontics. 2004;30(12):899–903. Epub 2004/11/27. 15564874.

19. Fan B, Cheung GS, Fan M, Gutmann JL, Fan W. C-shaped canal system in mandibular second molars: Part II—Radiographic features. Journal of Endodontics. 2004;30(12):904–8. Epub 2004/11/27. 15564875.

20. Fan B, Gao Y, Fan W, Gutmann JL. Identification of a C-shaped canal system in mandibular second molars-part II: the effect of bone image superimposition and intraradicular contrast medium on radiograph interpretation. Journal of Endodontics. 2008;34(2):160–5. Epub 2008/01/25. doi: 10.1016/j.joen.2007.10.010 18215673.

21. Lambrianidis T, Lyroudia K, Pandelidou O, Nicolaou A. Evaluation of periapical radiographs in the recognition of C-shaped mandibular second molars. International Endodontics Journal. 2001;34(6):458–62. Epub 2001/09/15. doi: 10.1046/j.1365-2591.2001.00417.x 11556513.

22. Dawood A, Marti Marti B, Sauret-Jackson V, Darwood A. 3D printing in dentistry. British Dental Journal. 2015;219(11):521–9. Epub 2015/12/15. doi: 10.1038/sj.bdj.2015.914 26657435.

23. Ordinola-Zapata R, Bramante CM, Duarte MA, Cavenago BC, Jaramillo D, Versiani MA. Shaping ability of reciproc and TF adaptive systems in severely curved canals of rapid microCT-based prototyping molar replicas. Journal of Applied Oral Science. 2014;22(6):509–15. Epub 2014/06/12. doi: 10.1590/1678-775720130705 24918662.

24. Soo WK, Thong YL, Gutmann JL. A comparison of four gutta-percha filling techniques in simulated C-shaped canals. International Endodontics Journal. 2015;48(8):736–46. Epub 2014/08/19. doi: 10.1111/iej.12371 25130364.

25. Brayton SM, Davis SR, Goldman M. Gutta-percha root canal fillings. An in vitro analysis. Part I. Oral Surgery, Oral Medicine, and Oral Pathology. 1973;35(2):226–31. Epub 1973/02/01. doi: 10.1016/0030-4220(73)90289-2 4574392.

26. Eguchi DS, Peters DD, Hollinger JO, Lorton L. A comparison of the area of the canal space occupied by gutta-percha following four gutta-percha obturation techniques using Procosol sealer. Journal of Endodontics. 1985;11(4):166–75. Epub 1985/04/01. doi: 10.1016/S0099-2399(85)80141-2 3858409.

27. Jerome CE. C-shaped root canal systems: diagnosis, treatment, and restoration. General Dentistry. 1994;42(5):424–7; quiz 33–4. Epub 1994/09/01. 7489874.

28. Simon JH. C-shaped canals: diagnosis and treatment. General Dentistry. 1993;41 Spec No:482–5. Epub 1993/11/01. 23087935.

29. Weine FS. Endodontic therapy on the mandibular second molar: easiest to treat of the difficult, molar teeth. Compendium. 1994;15(9):1130, 3–6 passim; quiz 40. Epub 1994/09/01. 7987904.

30. Cheung LH, Cheung GS. Evaluation of a rotary instrumentation method for C-shaped canals with micro-computed tomography. Journal of Endodontics. 2008;34(10):1233–8. Epub 2008/09/17. doi: 10.1016/j.joen.2008.07.015 18793928.

31. Ordinola-Zapata R, Bramante CM, de Moraes IG, Bernardineli N, Garcia RB, Gutmann JL. Analysis of the gutta-percha filled area in C-shaped mandibular molars obturated with a modified MicroSeal technique. International Endodontics Journal. 2009;42(3):186–97. Epub 2009/02/21. doi: 10.1111/j.1365-2591.2008.01495.x 19228207.

32. Solomonov M, Paque F, Fan B, Eilat Y, Berman LH. The challenge of C-shaped canal systems: a comparative study of the self-adjusting file and ProTaper. Journal of Endodontics. 2012;38(2):209–14. Epub 2012/01/17. doi: 10.1016/j.joen.2011.10.022 22244638.

33. Gok T, Capar ID, Akcay I, Keles A. Evaluation of Different Techniques for Filling Simulated C-shaped Canals of 3-dimensional Printed Resin Teeth. Journal of Endodontics. 2017;43(9):1559–64. Epub 2017/08/02. doi: 10.1016/j.joen.2017.04.029 28756962.

34. Sekiya M, Maeda M, Katsuumi I, Igarashi M. Evaluation of four instruments with different working motion using artificial plastic model with C-shaped single canal. Odontology. 2018;106(4):422–8. doi: 10.1007/s10266-018-0348-3 29429057

35. Yin X, Cheung GS-p, Zhang C, Masuda YM, Kimura Y, Matsumoto K. Micro-computed Tomographic Comparison of Nickel-Titanium Rotary versus Traditional Instruments in C-Shaped Root Canal System. Journal of Endodontics. 2010;36(4):708–12. doi: 10.1016/j.joen.2010.01.003 20307748

36. Mirfendereski M, Roth K, Fan B, Dubrowski A, Carnahan H, Azarpazhooh A, et al. Technique acquisition in the use of two thermoplasticized root filling methods by inexperienced dental students: a microcomputed tomography analysis. Journal of Endodontics. 2009;35(11):1512–7. Epub 2009/10/21. doi: 10.1016/j.joen.2009.07.027 19840639.

37. Gencoglu N. Comparison of 6 different gutta-percha techniques (part II): Thermafil, JS Quick-Fill, Soft Core, Microseal, System B, and lateral condensation. Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology 2003;96(1):91–5. Epub 2003/07/09. doi: 10.1016/s1079-2104(02)91704-x 12847450.

38. Lim KC, Webber J. The validity of simulated root canals for the investigation of the prepared root canal shape. International Endodontics Journal. 1985;18(4):240–6. Epub 1985/10/01. doi: 10.1111/j.1365-2591.1985.tb00450.x 3865899.

39. Lim SS, Stock CJ. The risk of perforation in the curved canal: anticurvature filing compared with the stepback technique. International Endodontics Journal. 1987;20(1):33–9. Epub 1987/01/01. doi: 10.1111/j.1365-2591.1987.tb00586.x 3468086.

40. Shemesh H, Wesselink PR, Wu MK. Incidence of dentinal defects after root canal filling procedures. Int Endod J. 2010;43(11):995–1000. Epub 2010/08/21. doi: 10.1111/j.1365-2591.2010.01740.x 20722755.

41. Blum JY, Machtou P, Micallef JP. Analysis of forces developed during obturations. Wedging effect: Part II. J Endod. 1998;24(4):223–8. Epub 1998/06/26. doi: 10.1016/S0099-2399(98)80100-3 9641122.

42. Blum JY, Machtou P, Micallef JP. Analysis of forces developed during obturations. Wedging effect: Part I. J Endod. 1998;24(4):217–22. Epub 1998/06/26. doi: 10.1016/S0099-2399(98)80099-X 9641121.