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CC BY-NC-ND 4.0 · Eur J Dent 2015; 09(04): 500-507
DOI: 10.4103/1305-7456.172623
Original Article
Dental Investigation Society

Anatomic symmetry of root and root canal morphology of posterior teeth in Indian subpopulation using cone beam computed tomography: A retrospective study

Gnanasekaran Felsypremila
1   Department of Conservative Dentistry and Endodontics, Faculty of Dental Sciences, Sri Ramachandra University, Tamil Nadu, India
,
Thilla Sekar Vinothkumar
2   Department of Restorative Dental Sciences, College of Dentistry, Jazan University, Jazan, Kingdom of Saudi Arabia
,
Deivanayagam Kandaswamy
1   Department of Conservative Dentistry and Endodontics, Faculty of Dental Sciences, Sri Ramachandra University, Tamil Nadu, India
› Author Affiliations
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Publication History

Publication Date:
23 September 2019 (online)

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ABSTRACT

Objective: To investigate the anatomic symmetry of maxillary and mandibular posteriors in Indian subpopulation using cone beam computed tomography (CBCT). Materials and Methods: CBCT images of 246 patients that had at least one noncarious, posterior tooth free of restorations in each quadrant were enrolled for retrospective analysis. A total of 3015 teeth (811 maxillary premolars, 845 mandibular premolars, 738 maxillary molars, and 621 mandibular molars) were analyzed for number of roots and root canals, canal morphology and anatomic symmetry, and concurrent types between the maxilla and mandible. Results: There was no difference in the percentage of symmetry for maxillary first (81.5%) and second (81.5%) premolars. Mandibular second premolars (98.3%) exhibited greater symmetry than mandibular first premolars (96.1%). First molars (77.5% and 82.1%) showed greater symmetry than second molars (70.8% and 78.6%), in both maxillary and mandibular arches, respectively. The most common anatomy observed were: maxillary first premolars – 2 roots with 2 canals, maxillary second premolars – 1 root with 2 canals, mandibular first and second premolars – 1 root with 1 canal, maxillary first and second molars – 3 roots with 4 canals, and mandibular first and second molars – 2 roots with 3 canals. When compared with any other teeth, maximum asymmetry was observed in maxillary second molar (29.2%). Conclusion: The percentage of symmetry observed in the present study varied from 70% to 98% with least percentage of symmetry in maxillary second molars. These data should alert the clinicians while treating homonymous teeth of the same patient.

Key words:

Anatomic symmetry - cone beam computed tomography - C-shaped canal - posterior teeth - radix entomolaris - radix paramolaris - root canal morphology
 

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