medigraphic.com
ISSN 1870-199X (Print)
Órgano oficial de la Facultad de Odontología, UNAM

2004, Number 1-2

<< Back Next >>

Rev Odont Mex 2004; 8 (1-2)

Mandibular molar root canals shape and diameter

Macías-Sánchez O, García-Aranda RL, Díaz-Maya MA

Language: Spanish
References: 26
Page: 21-36
PDF size: 128.11 Kb.


ABSTRACT

With the aim to get an adequate endodontic treatment, the precise knowledge of the internal morphology of the root canal at different levels would be of great help for the clinician. The aim of the present work was to determine the shape of the root canal from 540 horizontal slices at different levels (apical, medial and cervical) of mesial and distal roots of first and second inferior molars. The largest and smaller diameter was determined under stereoscopic microscopy. From the proportion of the diameters, the shape of the canals was described as circular, oval or elongated. It was found that at the cervical level the shape is mainly oval or elongated, but the oval and circular shapes tends to predominate at apical level. From the measures at the apical level of the Distal conduct it is suggested the minimal use of lime number 35, of number 30 for the MB and of 25 for the ML conduct. However, it is suggested to emphasize the instrumentation of the canal towards the buccal and lingual walls when debridating the conduct; also, the use of irrigating solutions in order to get a better prognostic of endodontic treatment.


REFERENCES

  1. Safavi KE, Spanberg LSW, Langeland K. Root canal dentinal tubule disinfection. J Endod 1990; 16: 207-10.

  2. Perez F, Clas P, Falguerolles A, Maurette A. Migration of streptococcus sanguid ytsin through the root dentinal tubules. J Endod 1993; 19: 297-301.

  3. Meryon SD, Jakeman KH, Browne RM. Penetration in vitro of human and ferret dentine by three bacterial species in relation to their potential role in pulpal inflammation. Int Endod J 1986; 19: 213-20.

  4. Michelich VJ, Schuster GS, Pashley DH. Bacterial penetration of human dentin in vitro. J Dent Res 1979; 59: 1398-403.

  5. Drake DR, Wiemann AH, Rivera EM, Walton RE. Bacterial retention in canal walls in vitro effect of smear layer. J Endod 1994; 20: 78-82.

  6. Akpata ES, Biechman H. Bacterial invasion of pulpal dentin wall in vitro. J Dent Res 1982; 61: 435-8.

  7. Perez F, Rochd T, Lodter JP, Calas P, Michel G. In vitro study of the penetration of three bacterial strains into root dentine. Oral Surg 1993; 76: 97-103.

  8. Torabinejad M, Ung B, Kettering JD. In vitro bacterial penetration of coronally unsealed endodontically treated teeth. J Endod 1990; 16: 566-9.

  9. Brannstrom M, Nygborg H. The presence of bacteria in cavities filled with silicate cement and composite resin materials. Swed Dent J 1971; 64: 149-55.

  10. Haapasalo M, Orstavik D. In vitro infection and disinfection of dentinal tubules. J Dent Res l999; 66: 1375-9.

  11. Chirnside IM. The bacteriological status of dentine around infected pulp canals. NZ Dent J 1958; 54: 173-83.

  12. Shorelton DS. The presence and distribution of micro-organisms within non-vital teeth. Br Dent J 1964; 117: 101-7.

  13. Gutierrez JH, V Elena F, Jofre A. Bacterial infiltration of dentin as influenced by proprietary chelanting agents. J Endodon 1982, 8: 448-54.

  14. Walton RE, Torabinejad M. Principles and Practice of Endodontics. 2nd Ed. Philadelphia: WB Saunders Company; 1996: 204.

  15. Kutler Y. Microscopic investigation of root apexes. JADA 1955; 6: 544-552.

  16. Pineda F, Kutler Y. Mesiodistal and buccolingual roentgenography, investigation of 7,275 root canals. OS 1972; 33: 1101-10.

  17. Mauger MJ, Schindler WG, Walker III WA. An evaluation of canal morphology at different levels of root resection in mandibular incisors. J Endod 1998; 24: 607-09.

  18. Wu MK, AR O, Barkis D, Wesselink PR. Prevalence and extent of long oval canals in the apical third. Oral Surg, Oral Med, Oral Pathol 2000; 89: 739-43.

  19. Schneider S. A comparison of canal preparations in straight and curved root canals. Oral Surg 1971; 32: 271-275.

  20. Lussi A, Nussbacher U, Grosrey J. A novel noninstrumented technique for cleaning the root canal system. J Endod 1993; 19: 549-553.

  21. Lussi A, Portmann P, Nussbacher U, Imwindelried S, Grosrey J. Comparison of two devices for root canal cleaning by the noninstrumentation technology. J Endod 1999; 25: 9-13.

  22. Kutler. Fundamento de Endometaendodoncia Práctica. 3a. Edición México: Francisco Méndez Editor; 1986: 7-17.

  23. Kekerekes K, Tronstand L. Morphometric observations on the root canals of human molars. J Endod 1977; 3: 114-118.

  24. Green D. A stereomicroscopic study of the root apices of 400 maxillary and mandibular anterior teeth. Oral Surg, Oral Med, Oral Pathol 1956; 9: 1224-1232.

  25. Laguna MA, Zinman EH, Kaplan SK. Comparison of the first file that fits at the apex, before and after early flaring. J Endod 2001; 27: 113-116.

  26. Vertucci FJ. Root canal anatomy of the human permanent teeth. Oral Surg 1984; 58: 589-599.




2020     |     www.medigraphic.com