J Korean Acad Conserv Dent.  2004 Nov;29(6):541-547. 10.5395/JKACD.2004.29.6.541.

A comparison of the length between mesio-buccal and mesio-lingual canals of the mandibular molar

Affiliations
  • 1Department of Conservative Dentistry, College of Dentistry, Chosun University, Korea. rootcanal@hanmail.net

Abstract

The aim of this study was to compare the initial apical file (IAF) length between the mesio-buccanl and mesio-lingual canals of the mandibular molar before and after early coronal flaring. Fifty mandibular molars with complete apical formation and patent foramens were selected. After establishing the initial working length of the buccal and lingual canal of the mesial root using the Root-ZX, radiographs were taken for the working length with a 0.5 mm short of #15 K-file tip just visible at the foramen under a surgical microscope (OPMI 1-FC, Carl Zeiss Co. Germany) at 25X. After early coronal flaring using the K3 file, additional radiographs were taken using the same procedure. The root canal morphology and the difference in working length between the buccal and lingual canals were evaluated. These results show that the difference in the length between the mesio-buccal and mesio-lingual canals of the mandibular molar was < or = 0.5 mm. If one canal has a correct working length for the mesial root of the mandibular molar, it can be used effectively for measuring the working length of another canal when the files are superimposed or loosening. In addition, the measured the working length after early coronal flaring is much more reasonable because the difference in the length between the mesio-buccal and mesio-lingual canals can be reduced.

Keyword

Early coronal flaring; Working length

MeSH Terms

Dental Pulp Cavity
Molar*

Figure

  • Figure 1 The device for taking a standard radiograph at the same position

  • Figure 2 Analysis of root canal type

  • Figure 3 Average working length of initial apical files


Cited by  1 articles

Study of endodontic working length of Korean posterior teeth
Jeong-Yeob Kim, Sang-Hoon Lee, Gwang-Hee Lee, Sang-Hyuk Park
J Korean Acad Conserv Dent. 2010;35(6):429-435.    doi: 10.5395/JKACD.2010.35.6.429.


Reference

1. Lim SS. Clinical Endodontics. 1999. 2nd ed. Seoul: Dentistry Magine;122–127.
2. Ingle J, Bakland L. Endodontics. 1985. 3th ed. Philadelphia: Lea & Febiger;36–37.
3. Kuttler Y. Microcopic investigation of root apexes. J Am Dent Assoc. 1955. 50:544–552.
4. Altman M. Apical root anatomy of human maxillary central incisors. Oral Surg. 1970. 30:694–699.
5. Burch JG, Hulen S. The relationship of the apical foramen to the anatomic apex of the tooth root. Oral Surg. 1972. 34:262–267.
Article
6. Burch JG, Hulen S. The relationship of the apical foramen to the anatomic apex of the tooth root. Oral Surg. 1972. 34:262–268.
Article
7. Green D. A stereomicroscopic study of the root apices of 400 maxillary and mandibular posterior teeth. Oral Surg. 1956. 9:1224–1232.
Article
8. Green D. Stereomicroscopic study of 700 root apices of maxillary and mandibular posterior teeth. Oral Surg. 1960. 13:728–733.
Article
9. Gutierrez JH, et al. Apical foraminal openings in human teeth. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1995. 79:769–777.
Article
10. Morfis A, et al. Study of the apices of human permanent teeth with the use of a scanning electron microscope. Oral Surg Oral Med Oral Pathol. 1994. 77:172–176.
Article
11. Goldman M, et al. Reliability of radiographic interpretations. Oral Surg Oral Med Oral Pathol. 1974. 38:287–293.
Article
12. Cohen S, Burns R. Pathways of the pulp. 1988. 7th ed. St. Louis: CV Mosby;248–251.
13. Wheeler RC. Dental Anatomy, Physiology and Occlusion. 1974. 5th ed. W.B. Saunders Co;267–297.
14. Grossman L. Endodontic practice. 1988. 11th ed. Philadelphia: Lea & Febiger;169–173.
15. Ingle JI, Bakland LK. Endodontics. 2002. 5th ed. Philadelphia: Lea & Febiger;462–469.
16. Cohen S, Burns R. Pathways of the pulp. 2002. 8th ed. St. Louis: CV Mosby;210–217.
17. Weine FS. Endodontic therapy. 1982. 3rd ed. St. Louis: Mosby Co;209.
18. Woelfel JG, Scheid RC. Dental Anatomy. 2002. 1st ed. philadelphia: Williams & Wilkins;97–107.
19. Pineda F, Kuttler Y. Mesiodistal and buccolingual roentgenographic investigation of 7,275 root canals. Oral Surg. 1972. 33:101–110.
Article
20. Green D, Brooklyn NY. Double canals in single roots. Oral Surg. 1973. 35:689–696.
Article
21. Vertucci FJ. Root canal anatomy of the human permanent teeth. Oral Surg. 1984. 58:589–599.
Article
22. Blayney JR. Some factors in root canal treatment. J Dent Res. 1924. 11:840.
23. Groove CJ. Faculty technic in investigations of the apices of pulpless teeth. J Am Dent Assoc. 1926. 13:746.
24. Katz A, et al. Tooth length determination; A review. Oral Surg. 1991. 72:238–242.
Article
25. Kobayashi C, Suda H. New Electronic canal length measuring device on the ratio method. J Endod. 1994. 20:111–114.
26. Cohen S, Burns R. Pathways of the pulp. 1994. 6th ed. St. Louis: CV Mosby;179–218.
27. Hwang HG, Shin YG, Kim PS. A study on the accuracy of the root-zx according to the various conditions of root canals. J Korean Acad Conserv Dent. 2000. 25:474–482.
28. Hulsmann M, et al. An improved technique for the evaluation of root canal preparation. J Endod. 1999. 25:599–602.
Article
29. Hwang HG, Shin YG. The effectiveness of obturating techniques in sealing isthmuses. J Korean Acad Conserv Dent. 2001. 26:499–506.
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