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Mandibular first molars with disto-lingual roots: review and clinical management.
Int Endod J. 2012 Nov; 45(11):963-78.IE

Abstract

The purpose of this review was (i) to conduct a literature review on the prevalence and morphologic classification of mandibular first molars with disto-lingual (DL) roots, and (ii) to discuss the clinical approach to diagnosis and root canal treatment of these teeth. A search was carried out on electronic (MEDLINE, PubMed and Cochrane) and hand databases, which covered all publications from 1970 to December 2011. Two reviewers independently assessed the studies and recorded type of study, origin and sample sizes, number of teeth with three roots and type of root canal configuration. Forty-five studies were identified with a total of 19,056 mandibular first molar teeth. The frequency of DL roots was 14.4% and was associated with certain ethnic populations. The most common canal configuration of mesial and distal roots was Vertucci types IV and I, respectively. No significant differences were observed in the prevalence of DL roots according to gender. Variable results related to side were observed as well as a trend in bilateral occurrence. The root length of the DL roots was in general shorter than that of the disto-buccal roots (DB). Most DL roots had a greater angle of curvature and a smaller radius of curvature in a bucco-lingual orientation. The best methods to identify DL roots are a 25° mesial parallax periapical radiograph or cone-beam computed tomography (CBCT). A trapezoidal shape access cavity is desirable to locate the orifice of the DL canal. Clinicians should be aware of the variable furcation levels during coronal pre-flaring or post-space preparation to avoid furcal/strip perforations and a weakening of DL roots.

Authors+Show Affiliations

Department of Endodontics, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Barcelona, Spain.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Review

Language

eng

PubMed ID

22681628

Citation

Abella, F, et al. "Mandibular First Molars With Disto-lingual Roots: Review and Clinical Management." International Endodontic Journal, vol. 45, no. 11, 2012, pp. 963-78.
Abella F, Patel S, Durán-Sindreu F, et al. Mandibular first molars with disto-lingual roots: review and clinical management. Int Endod J. 2012;45(11):963-78.
Abella, F., Patel, S., Durán-Sindreu, F., Mercadé, M., & Roig, M. (2012). Mandibular first molars with disto-lingual roots: review and clinical management. International Endodontic Journal, 45(11), 963-78. https://doi.org/10.1111/j.1365-2591.2012.02075.x
Abella F, et al. Mandibular First Molars With Disto-lingual Roots: Review and Clinical Management. Int Endod J. 2012;45(11):963-78. PubMed PMID: 22681628.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mandibular first molars with disto-lingual roots: review and clinical management. AU - Abella,F, AU - Patel,S, AU - Durán-Sindreu,F, AU - Mercadé,M, AU - Roig,M, Y1 - 2012/06/11/ PY - 2012/6/12/entrez PY - 2012/6/12/pubmed PY - 2013/11/5/medline SP - 963 EP - 78 JF - International endodontic journal JO - Int Endod J VL - 45 IS - 11 N2 - The purpose of this review was (i) to conduct a literature review on the prevalence and morphologic classification of mandibular first molars with disto-lingual (DL) roots, and (ii) to discuss the clinical approach to diagnosis and root canal treatment of these teeth. A search was carried out on electronic (MEDLINE, PubMed and Cochrane) and hand databases, which covered all publications from 1970 to December 2011. Two reviewers independently assessed the studies and recorded type of study, origin and sample sizes, number of teeth with three roots and type of root canal configuration. Forty-five studies were identified with a total of 19,056 mandibular first molar teeth. The frequency of DL roots was 14.4% and was associated with certain ethnic populations. The most common canal configuration of mesial and distal roots was Vertucci types IV and I, respectively. No significant differences were observed in the prevalence of DL roots according to gender. Variable results related to side were observed as well as a trend in bilateral occurrence. The root length of the DL roots was in general shorter than that of the disto-buccal roots (DB). Most DL roots had a greater angle of curvature and a smaller radius of curvature in a bucco-lingual orientation. The best methods to identify DL roots are a 25° mesial parallax periapical radiograph or cone-beam computed tomography (CBCT). A trapezoidal shape access cavity is desirable to locate the orifice of the DL canal. Clinicians should be aware of the variable furcation levels during coronal pre-flaring or post-space preparation to avoid furcal/strip perforations and a weakening of DL roots. SN - 1365-2591 UR - https://www.unboundmedicine.com/medline/citation/22681628/Mandibular_first_molars_with_disto_lingual_roots:_review_and_clinical_management_ L2 - https://doi.org/10.1111/j.1365-2591.2012.02075.x DB - PRIME DP - Unbound Medicine ER -