The effect of early coronal flaring about apical extrusion of debris

Article information

Restor Dent Endod. 2004;29(2):147-152

Publication date (electronic) : 2004 March 31

doi : https://doi.org/10.5395/JKACD.2004.29.2.147

Min-Kyung Kim , Jeong-Beom Min , Ho-Keel Hwang

Department of Conservative Dentistry, College of Dentistry, Chosun University, Korea.

Corresponding author: Ho-Keel Hwang. Department of Conservative Dentistry, College of Dentistry, Chosun University, 375 Susuk-dong, Dong-gu, Gwangju 501-759, Korea. Tel: 82-62-220-3840, Fax: 82-62-232-9064, rootcanal@hanmail.net

Abstract

The purpose of this study was to investigate the quantity of debris which was extruded apically after canal instrumentation using different types of enlarging instrument in endodontic resin models.

Five groups of 9 endodontic resin models were instrumented using each different technique: hand instrumentation without early coronal flaring, hand instrumentation after early coronal flaring, and three nickel-titanium engine-driven instrumentations (Hero 642, Protaper, K³). Debris extruded from apical foramen during instrumentation was collected on preweighed CBC bottle, desiccated and weighted using electronic balance. The results were analyzed using Kruskal-wallis test and Mann-Whitney U rank sum test at a significance level of 0.05.

The results were as follows:

All of instrumentation techniques produced apically extruded debris.
Group without early coronal flaring extruded significant more debris than groups with early coronal flaring.
There was no significant difference among early coronal flaring groups.

The early coronal flaring is very important to reduce the amount of debris extruded apically.

Keywords: Apically extruded debris; Hand instrumentation; Hero 642; Protaper; K³; Early coronal flaring

References

1. Becker GL, Cohen S, Borer R, Calif SF. The sequelae of accidentally injecting sodium hypochlite beyond the root apex. Oral Surg Oral Med Oral Pathol 1974. 38633–638.

2. Brown DC, Keith Moore B, Brown CE, Newton CW. An in vitro study of apical extrusion of sodium hypochlorite during endodontic canal preparation. J Endod 1995. 21587–591.

3. Gatot A, Arbelle J, Leiberman A, Yanai-Inbar I. Effects of sodium hypochlorite on soft tissues after its inadvertent injection beyond the root apex. J Endod 1991. 17573–574.

4. Marshall JG, Liesinger AW. Factors associated with endodontic posttreatment pain. J Endod 1993. 19573–575.

5. Naidorf IJ. Endodontic flare-ups. Bacteriological and immunological mechanisms. J Endod 1985. 11462–464.

6. Seltzer S, Naidorf IJ. Flare-ups in Endodontics. 1. etiological factors. J Endod 1985. 11472–478.

7. Vande Visse JE, Brilliant JD. Effect of irrigation on the production of extruded material at the root apex during instrumentation. J Endod 1975. 1243–246.

8. Fukushima H, Yamamoto K, Hirohata K, Sagawa H, Leung K-P, Walker CB. Localization and identification of root canal bacteria in clinically asymptomatic periapical pathosis. J Endod 1990. 16534–538.

9. Abou-Rass M, Jastrab RJ. The use of rotary instruments as auxiliary aids to root canal preparation of molars. J Endod 1982. 878–82.

10. Chapman CE, Collee JG, Beagrie GS. A preliminary report on the correlation between apical infection and instrumentation in endodontics. J Br Endod Soc 1968. 27–11.

11. Chapman CE. The correlation between apical infection and instrumentation in endodontics. J Br Endod Soc 1971. 576–80.

12. Martin H, Cunningham WT. The effect of endosonic and hand manipulation on the amount of root canal material extruded. Oral Surg Oral Med Oral Pathol 1982. 53611–613.

13. Seltzer S, Soltanoff W, Sinai I, Goldenberg A, Bender IB. Biologic aspects of endodontics. Part III. periapical tissue reactions to root canal instrumentation. Oral Surg Oral Med Oral Pathol 1968. 26534–546. 694–705.

14. Fairbourn DR, McWalter GM, Montgomery S. The effect of four preparation techniques on the amount of apically extruded debris. J Endod 1987. 13102–108.

15. Ruiz-Hubard EE, Gutmann JL, Wagner MJ. A quantitative assessment of canal debris forced periapically during root canal instrumentation using two different techniques. J Endod 1987. 13554–558.

16. Ferraz CC, Gomes NV, Gomes BPFA, Zaia AA, Teixeira FB, Souza-Filho FJ. Apical extrusion of debris and irrigants using two hand and three engine-driven instrumentation techniques. Int Endod J 2001. 34354–358.

17. Coffae KP, Brilliant JD. The effect of serial preparation versus nonserial preparation on tissue removal in the root canals of extracted mandibular human molars. J Endod 1975. 1211–214.

18. Goerig AC, Michelich RJ, Schultz CHH. Instrumentation of root canals in molar using the step-down technique. J Endod 1982. 8550–554.

19. Leeb J. Canal orifice enlargement as related to biomechanical preparation. J Endod 1983. 9463–471.

20. Morgan LF, Montgomery S. An evaluation of the crown-down pressureless technique. J Endod 1984. 10491–498.

21. Swindle RB, Neaverth EJ, Pantera EA, Ringle RD. Effect of coronal-radicular flaring on apical transportation. J Endod 1991. 17147–150.

22. Cohen S, Burns RC. Pathways of the Pulp 8th edth ed. 246–247.

23. Gambarini G. Shaping, cleaning the root canal system. A scanning electron microscopic evaluation of a new instrumentation and irrigation technique. J Endod 1999. 25800–803.

24. Myers GL, Mongomery S. A comparison of weights of debris extruded apically by conventional filling and canal master techniques. J Endod 1991. 17275–279.

25. Hinrichs RE, Walker WA III, Schindler WG. A Comparison of amounts of apically extruded debris using handpiece-driven nickel-titanium instrument systems. J Endod 1998. 24102–106.

26. Lim KC, Webber J. The validity of simulated root canals for the investigation of the prepared root canal shape. Int Endod J 1985. 18240–246.

27. Gerstein H. Techniques in clinical endodontics 1983. Philadelphia: WB Saunders; 324–331.

28. Montgomery S. Root canal wall thickness of mandibular molars after biomechanical preparation. J Endod 1985. 11257–263.

29. Reddy SA, Hicks ML. Apical extrusion of debris using two hand two rotary instrumentation techniques. J Endod 1998. 24180–183.

30. Beeson TJ, Hartwell GR, Thornton JD, Gunsolley JC. Comparison of debris extruded apically in straight canals: conventional filing versus profile .04 taper series 29. J Endod 1998. 2418–22.

31. al-Omari MA, Dummer PMH. Canal blockage and debris extrusion with eight preparation techniques. J Endod 1995. 21154–158.

32. Mckendry DJ. Comparison of balanced forces, endosonic, and step-back filing instrumentation techniques: Quantification of extruded apical debris. J Endod 1990. 1624–27.

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