Evaluation of the relationship between crown size and root canal morphology of mandibular incisors by cone beam computed tomography (CBCT)
Background: The main reason for the failure of endodontic therapy is the incomplete knowledge about the anatomical variation of root canals. One of the most important factors that leads to the failure of root canal treatment, is missed and untreated major root canals. Objective: with respect to t...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Electronic Physician
2017-08-01
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| Series: | Electronic Physician |
| Subjects: | |
| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5614284/ |
| Summary: | Background: The main reason for the failure of endodontic therapy is the incomplete knowledge about the
anatomical variation of root canals. One of the most important factors that leads to the failure of root canal
treatment, is missed and untreated major root canals.
Objective: with respect to the complexity of mandibular incisors treatment and high prevalence of the second
canal, and the possibility of the relationship between the crown size and the extra canal in these teeth, the aim of
this study was to determine the relationship between crown size and root canal morphology in mandibular
incisors with CBCT.
Methods: In this cross-sectional study, mandibular permanent incisors were randomly collected in Qazvin City,
Iran, and were mounted in eight ternary groups on a plastic slot, using putty molding material. After preparation
of Scot view, the samples were scanned by CBCT NewTom 5G. Afterward, the mesiodistal and buccolingual
dimensions were measured by the software’s measurement tool with a precision within tenths of a millimeter. In
the next stage, a multi-planar option and 400% magnification tool of the software were utilized to study axial and
cross sectional views of each tooth to determine canal type. Data were analyzed employing one-sample
Kolmogorov-Smirnov, Levene, independent- samples t-test and Roc curve by SPSS version 20.
Results: The majority of mandibular incisors have a single canal (63.9% of them had type I canal system). In
addition, 36.1% of the roots had two canals, among which, type III was the most common. The mean of
maximum mesiodistal and buccolingual diameters in type III was significantly bigger than that in type I (p<0.05),
but the means of crown size in the two canal types were not significantly different.
Conclusion: Despite increase in mesiodistal and buccolingual dimension in two canal mandibular incisors with
type III canal system, their crown sizes (M-D/F-L index) were not significantly different, in comparison to single
canal incisors. |
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| ISSN: | 2008-5842 2008-5842 |