The cemento-dentino-canal junction, the apical constriction, and the apical foramen
are the principal reference points used to determine the apical limit for instrumentation
and root canal filling. For a better understanding of these structures, the objective
of this study was to evaluate histologically the localization of the cemento-dentino-canal
junction and the diameters of the apical foramen and root canal at the cemento-dentino-canal
junction. Eighteen anterior maxillary teeth (canines, central, and lateral incisors)
were used, from which 269 histological sections were obtained and evaluated by optical
microscopy. The results indicated that the longest extension of the cementum into
the root canal was observed in the canines, this value decreasing in the lateral incisors,
and even more so in the central incisors. The widest diameter of the apical foramen
corresponded to the lateral incisors, followed by the canines and the central incisors.
The diameter of the root canal at the cemento-dentino-canal junction was greatest
in the canines and lowest in the central and lateral incisors. Great variability was
observed in the measurements of the extension of the cementum into the root canal.
To read this article in full you will need to make a payment
Purchase one-time access:
Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online accessOne-time access price info
- For academic or personal research use, select 'Academic and Personal'
- For corporate R&D use, select 'Corporate R&D Professionals'
Subscribe:
Subscribe to Journal of EndodonticsAlready a print subscriber? Claim online access
Already an online subscriber? Sign in
Register: Create an account
Institutional Access: Sign in to ScienceDirect
References
- Why root canals should be filled to the dentinocemental junction.J Am Dent Assoc. 1930; 17: 293-296
- Microscopic investigation of root apexes.J Am Dent Assoc. 1955; 50: 544-552
- Vías de la pulpa. 7th ed. Harcourt, España1999: 209
- Anatomical study of the root apex in the maxillary anterior teeth.J Endodon. 1992; 18: 344-347
- A stereomicroscopic study of the root apices of 400 maxillary and mandibular anterior teeth.Oral Surg. 1956; 9: 1224-1232
- Mesiodistal and buccolingual roentgenographic investigation of 7,275 root canals.Oral Surg. 1972; 33: 101-110
- Apical root anatomy of human maxillary central incisors.Oral Surg. 1976; 5: 694-699
- Fundamentos de endo-metaendodoncia práctica. 2nd ed. Mendez Otero, Mexico1980: 8
- A stereo–binocular microscopic study of the root apices and surrounding areas of 100 mandibular molars: preliminary study.Oral Surg Oral Med Oral Pathol. 1955; 8: 1298-1304
- A microscopic study of the apical region of human anterior teeth.J Br Endod Soc. 1969; 3: 52-58
- The relationship of the apical foramen to the anatomic apex of the tooth root.Oral Surg. 1972; 34: 262-268
- Apical foraminal openings in human teeth. Number and location.Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1995; 79: 769-777
- Endodoncia, principios y práctica clínica. Interamericana McGraw-Hil, México1991: 27
- Ist das foramen apical stationar?.Deutsche Monatschr Zahneilk. 1927; 45: 1016-1021
- The position and topography of the apical canal constriction and apical foramen.Int Endod J. 1984; 17: 192-198
- A basic study on the electronic root canal length measurement. Part 4. A comparison of 6 apex locators.Jpn J Conserv Dent. 1993; 36: 185-192
Article info
Footnotes
The authors thank Ana Ma Eiroa for the translation of this work
Identification
Copyright
© 2003 The American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
