Topographic Evaluation of Apex and Root Canal of Maxillary Premolars in an Iranian Population
Journal of Dental School,
Vol. 31 No. 1 (2013),
27 January 2013
https://doi.org/10.22037/jds.v31i1.28639
Abstract
Objective: Knowledge about the internal anatomy of the root canal and apical foramen is a critical prerequisite for root canal therapy and is necessary for the success of endodontic treatment. This study aimed to determine the distance of apical foramen from the anatomical apex and apical constriction, evaluate the deviation of apical foramen from the anatomical apex and specify the most common canal types in maxillary premolar teeth using stereomicroscope.
Methods: In this laboratory experimental study, 100 extracted first and second maxillary premolars of patients presenting to dental clinics in Tehran were selected. After the disinfection of roots and access cavity preparation, apical foramen deviation and its distance from the anatomical apex were determined by introducing a #10 hand file into the canal and observation under stereomicroscope; 2% methylene blue was then injected into the canals and demineralization and clearing process were carried out to measure the distance of apical foramen from the apical constriction and evaluate the canal type.
Results: The mean distance of apical foramen from the anatomical apex and apical constriction was 0.4-0.5 and 0.5-0.7 mm, respectively in maxillary first premolars and 0.3-0.7 and 0.6-1 mm, respectively in maxillary second premolars. In less than 17% of first premolars and 37% of second premolars, the canal followed a straight path to the anatomical apex without any deviation towards the mesiodistal or buccolingual directions. The most common canal type according to Vertucci’s classification was type IV in the first and type I in the second premolars. In general, 94% (n=47) of the first premolars and 46% (n=23) of the second premolars had 2 canals while the remaining teeth had a single canal.
Conclusion: This study showed that the apical foramen in premolar teeth is located at a 0.3-0.7 mm distance from the anatomical apex and 0.5-1 mm distance from the apical constriction. In more than 83% of first premolars and 63% of second premolars the apical foramen did not correspond to the anatomical apex. First and second premolars had 2 canals in 94% and 46% of cases, respectively.
- Anatomical apex
- Apical constriction
- Apical foramen
- Canal deviation
- Canal type
- Clearing process
- Premolar
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References
Partovi M, Mozzafari SF. Root canal Morphology of maxillary second premolars. JBUMS 2005; 7: 34-36.
Asna-ashari M, Nouri M, Mozayyeni MA, Seradji F: Evaluation of apical foramen situation by anatomic apex anddiagnostic value of radiography on determination of its location (A Stereomicroscopic study). J Dent Sch 2004; 22:361-368.
Yoshioka T, Kikuchi I, Fukumoto Y, Kobayashi C, Suda H. Detection of the second mesiobuccal canal in mesiobuccal roots of maxillary molar teeth ex vivo. Int Endod J 2005; 38: 124-128 .
Burch JG, Hulen S. The relationship of the apical foramen to the anatomic apex of the tooth root. Oral Surg Oral Med Oral Pathol 1972;34:262-268
Vertucci FJ, Haddix JE. Tooth morphology and access cavity preparation. In: Cohen S, Hargreaves KM, eds. Pathways of the pulp.10th Ed. St. Louis: The C.V. Mosby Co. 2011; Chap 7: 138-377
Robertson D, Leeb IJ, McKee M, Brewer E. A clearing technique for the study of root canal systems. J Endod 1980; 6: 421-424.
Vertucci FJ. Root canal anatomy of the human permanent teeth. Oral Surg Oral Med Oral Pathol 1984; 58: 589-599.
Calişkan MK, Pehlivan Y, Sepetçioğlu F, Tűrkűn M, Tuncer SS. Root canal morphology of human permanent teeth in a Turkish population. J Endod 1995; 21: 200-204.
Green D. Stereomicroscopic study of 700 root apices of maxillary and mandibular posterior teeth. Oral Surg Oral Med Oral Pathol 1960; 13: 728-733.
Tamse A, Katz A, Kablan F. Comparison of apical leakage shown by four different dyes with two evaluating methods. Int Endod J 1998; 31: 333-337.
Sert S, Bayirli GS. Evaluation of the root canal configurations of the mandibular and maxillary permanent teeth by gender in the Turkish population. J Endod 2004; 30: 391-398.
Imura N, Hata GI, Toda T, Otani SM, Fagundes MI. Two canals in mesiobuccal roots of maxillary molars. Int Endod J 1998; 31: 410-414.
Pécora JD, Woelfel FB, Sousa Neto MD, Issa EP. Morphologic study of the maxillary molars. Part II: Internal anatomy. Braz Dent J 1992; 3: 53-57.
Al Shalabi RM, Omer OE, Glennon J, Fennings M, Claffey NM. Root canal anatomy ofmaxillary first and second permanent molars. Int Endod J 2000; 33: 405-414.
Yang ZP, Yang SF, Lee G. The root and root canal anatomy of maxillary molars in a Chinese population. Endod Dent Traumatol 1988; 4: 215-218.
Ponce EH, Vilar Fernández JA. The cemento – dentino – canal junction, the apical foramen, and the apical constriction: evaluation by optical microscopy. J Endod 2003; 29: 214-219.
Peters OA. Current challenges and concepts in the preparation of root canal systems: A review. J Endod 2004; 30: 559-567.
Dummer PM, McGinn JH, Rees DG. The position and topography of the apical canal constriction and apical foramen. Int Endod J 1984; 17: 192-198.
Melius B, Jiang J, Zhu Q. Measurement of the distance between the minor foramen and the anatomic apex by digital and conventional radiography. J Endod 2002; 28: 125-126.
Arora S, Tewari S. The morphology of the apical foramen in posterior teeth in a North Indian population. Int Endod J 2009; 42: 930-939.
Nasseri M, Ahangari Z, Momayyez M. Evaluation of the distance of apical constriction from anatomic and radiographic apices in extracted maxillary second premolars using the clearing technique. J Dent Sch 2012; 30: 95-99.
Kuttler Y. Microscopic investigation of root apexes. J Am Dent Assoc 1955; 50: 544-552.
Martos J, Ferrer-Luque CM, Gonzalez-Rodriguez MP, Castro LA. Topographical evaluation of the major apical foramen in permanent human teeth. Int Endod J 2009; 42: 329-334.
Sadr Lahijani M, Shariati M, Sadeghi M. Evaluation of root canal anatomy in mandibular anterior-teeth and mandibular and maxillary premolars in vitro. J Rafsanjan Univ Med Sci 2002; 1: 92-98.
Jayasimha Raj U, Mylswamy S. Root canal morphology of maxillary second premolars in an Indian population. J Conserv Dent 2010; 13:148-151.
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