Endodontic Management of Mandibular Incisors with Multiple Canals Using Cone-beam Computed Tomography – A Case Series

ABSTRACT Recently, various diagnostic tools have emerged with a view to enhance endodontic treatment. Cone-beam computed tomography (CBCT) is presented as a new endodontic tool. The narrow field CBCT reduces the negative effects of anatomic noise, geometric distortion, and technique sensitivity observed on two-dimensional images. It can be used to identify canal morphology, numbers of canals, and relative positioning even in the presence of calcific metamorphosis (CM) and dystrophic calcifications. Calcific metamorphosis is characterized by the deposition of hard tissue within the pulp canal space. Most of the literature advices the treatment of CM through observation and periodic examination. Thus, it is imperative for the clinician to identify calcified canals preoperatively for conservative treatment approach. This case series illustrates about the versatility of CBCT over the conventional radiology for detecting calcified canals. How to cite this article Chougule AR, Kundabala M, Mohan RP, Shetty N. Cone-beam Computed Tomography: A Resolution to Paradoxical Judgments in Endodontic Diagnosis. World J Dent 2016;7(2):100-106.

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An Evaluation of the Root Canal Anatomy of Mandibular Incisors in Turkish Population with Cone-Beam Computed Tomography (CBCT)

Oral Health & Dental Science ◽

10.33425/2639-9490.1071 ◽

2020 ◽

Vol 4 (5) ◽

Author(s):

Erhan Erkan ◽

Keziban Olcay ◽

Tan Fırat Eyüboğlu ◽

Elif Sener

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

Turkish Population ◽

Cone Beam ◽

Root Canal Anatomy ◽

Mandibular Incisors

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How well do integrated 3D models predict alveolar defects after treatment with clear aligners?

The Angle Orthodontist ◽

10.2319/042220-342.1 ◽

2021 ◽

Author(s):

Ting Jiang ◽

Jian Kai Wang ◽

Yang Yang Jiang ◽

Zheng Hu ◽

Guo Hua Tang

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Alveolar Bone ◽

Pearson Correlation ◽

Cone Beam ◽

Molar Distalization ◽

Predictive Values ◽

Anterior Teeth ◽

Mean Differences ◽

Mandibular Incisors

ABSTRACT Objectives To evaluate the accuracy of integrated models (IMs) constructed by pretreatment cone-beam computed tomography (pre-CBCT) in diagnosing alveolar defects after treatment with clear aligners. Materials and Methods Pre-CBCT and posttreatment cone-beam computed tomography (CBCT) scans from 69 patients who completed nonextraction treatment with clear aligners were collected. The IMs comprised anterior teeth in predicted positions and alveolar bone from pre-CBCT scans. The accuracy of the IMs for identifying dehiscences or fenestrations was evaluated by comparing the means of the defect volumes, absolute mean differences, and Pearson correlation coefficients with those measured from post-CBCT scans. Defect prediction accuracy was assessed by sensitivity, specificity, positive predictive values, and negative predictive values. Factors possibly affecting changes in mandibular alveolar defects were analyzed using a mixed linear model. Results The IM measurements showed mean deviations of 2.82 ± 9.99 mm3 for fenestrations and 3.67 ± 9.93 mm3 for dehiscences. The absolute mean differences were 4.50 ± 9.35 mm3 for fenestrations and 5.17 ± 9.24 mm3 for dehiscences. The specificities of the IMs were higher than 0.8, whereas the sensitivities were both lower (fenestration = 0.41; dehiscence = 0.53). The positive predictive values were unacceptable (fenestration = 0.52; dehiscence = 0.62), and the overall reliability was low (<0.80). Molar distalization and proclination were positively correlated with significant increases in alveolar defects at the mandibular incisors after treatment. Conclusions Alveolar defects after clear aligner treatment cannot be simulated accurately by IMs constructed from pre-CBCT. Caution should be taken in the treatment of crowding with proclination and molar distalization for the safety of alveolar bone at the mandibular incisors.

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Second Root Canal in Mandibular Incisors: an Ex Vivo Cone-Beam Computed Tomography (CBCT) Study

Balkan Journal of Dental Medicine ◽

10.2478/bjdm-2018-0007 ◽

2018 ◽

Vol 22 (1) ◽

pp. 38-42

Author(s):

Maria Elpida Kalaitzoglou ◽

Eleni Kantilieraki ◽

Charalampos Beltes ◽

Christos Angelopoulos ◽

Panagiotis Beltes

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

Ex Vivo ◽

Cone Beam ◽

Mean Values ◽

Root Canals ◽

The Mean ◽

Type 3 ◽

Mandibular Incisors

SummaryBackground/Aim: To analyze the internal morphology of mandibular incisors with two root canals using cone-beam computed tomography (CBCT). Material and Methods: 289 (143 central and 146 lateral) extracted intact mandibular incisors were radiographed for detection of a second root canal. The teeth presenting a second root canal were imaged with CBCT and evaluated regarding: root canal type, the distance of the cementoenamel junction (CEJ) to the bifurcation of the canals and the distance of the canal fusion to the apical foramen (in teeth in which canals rejoined). Results: Out of 143 central and 146 lateral mandibular incisors, 41 (28.7%) and 44 (30.1%) teeth respectively showed a second root canal. Types II, III, V and an additional type to Vertucci’s classification were identified. Type III was the most prevalent and presented in 30 (73.2%) central and 34 (77.3%) lateral mandibular incisors with two root canals. The mean values of the distance of the CEJ to the canal bifurcation were 4.2 mm and 4.0 mm for central and lateral mandibular incisors respectively. The mean values of the distance of the canal fusion to the apical foramen 5.5 mm and 5.1 mm for central and lateral mandibular incisors respectively. Conclusions: Mandibular incisors with two root canals mainly present with Vertucci’s Type 3 canal configuration. The canal bifurcation was identified mostly at the coronal and middle thirds of the root, while the canal fusion occurred in the middle third of the root.

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