Tooth Segmentation from Cone Beam Computed Tomography Images Using the Identified Root Canal and Harmonic Fields

Objective To evaluate the root and root canal morphology of the maxillary second molars (MSMs) in a native Chinese population by cone-beam computed tomography. Methods Cone-beam computed tomography images of 2412 MSMs from 1294 Chinese patients were analyzed to determine the number and morphology of the roots, the root canal morphology, the bilateral symmetry, and the correlations of these parameters with sex and age. Results The percentage of fused roots increased with age, while the percentage of fused roots in women was higher than that in men. The percentage of second mesiobuccal (MB2) canals in MSMs with three separate roots was higher in men than women. Patients aged 31 to 40 years showed a higher prevalence of MB2 canals, while those aged ≥51 years showed the lowest prevalence of MB2 canals among both men and women. There was a significant difference in bilateral symmetry of MSMs between men and women. Conclusion Root fusion of MSMs increased with age, while the root canal morphology was more complex in patients of intermediate ages.

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Root canal sealers affect artifacts on cone-beam computed tomography images

Odontology ◽

10.1007/s10266-021-00590-8 ◽

2021 ◽

Author(s):

Hazuki Miyashita ◽

Rieko Asaumi ◽

Ayaka Sakamoto ◽

Taisuke Kawai ◽

Masaru Igarashi

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

Cone Beam ◽

Computed Tomography Images ◽

Root Canal Sealers

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Cone-beam Computed Tomography Investigation of Middle Mesial Canals and Isthmuses in Mandibular First Molars in a Chinese Population

10.21203/rs.2.9841/v1 ◽

2019 ◽

Author(s):

Shuaimei Xu ◽

Junfeng Dao ◽

Zhongjun Liu ◽

Zhiyong Zhang ◽

Yu Lu ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

Chinese Population ◽

Average Length ◽

Cone Beam ◽

Chinese Populations ◽

Mandibular Molars ◽

Computed Tomography Images ◽

Partial Communication

Abstract Background While there is ample research into the anatomy of mandibular molars, little is known regarding isthmuses and middle mesial (MM) canals in Chinese populations. The goal of this study was to determine the prevalence of MM canals and isthmuses in the mesial root of mandibular first molars using Cone-beam Computed Tomography. Methods Cone-beam Computed Tomography images of 357 mature mandibular first molars were retrospectively analyzed. Data regarding demographics, side of mandible, presence of separated distal-lingual roots, presence of isthmuses and MM canals, and the length of isthmuses in the mesial root were recorded. Results Of these 357 teeth, 209 showed evidence of either complete or partial communication in the mesial root. Of these, 11(3.08%) exhibited true MM canals while 198(55.46%) exhibited isthmuses. Sex or side of mandible was not correlated with the incidence of communication (isthmuses or MM canals) (P> 0.05). However, there was a significant association between the presence of a distal-lingual root and the incidence of such communication (P< 0.05). The average length of isthmuses was 4.26 ± 3.14mm. Conclusions We detected high rates of mandibular molars with isthmuses, which is important as such areas should be identified and cleaned during root canal treatment.

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3D exemplar-based random walks for tooth segmentation from cone-beam computed tomography images

Medical Physics ◽

10.1118/1.4960364 ◽

2016 ◽

Vol 43 (9) ◽

pp. 5040-5050 ◽

Cited By ~ 5

Author(s):

Yuru Pei ◽

Xingsheng Ai ◽

Hongbin Zha ◽

Tianmin Xu ◽

Gengyu Ma

Keyword(s):

Computed Tomography ◽

Random Walks ◽

Cone Beam Computed Tomography ◽

Cone Beam ◽

Computed Tomography Images ◽

Tooth Segmentation

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Effect of root canal filling materials on dimensions of cone-beam computed tomography images

Journal of Applied Oral Science ◽

10.1590/s1678-77572012000200023 ◽

2012 ◽

Vol 20 (2) ◽

pp. 260-267 ◽

Cited By ~ 18

Author(s):

Daniel Almeida Decurcio ◽

Mike Reis Bueno ◽

Ana Helena Gonçalves de Alencar ◽

Olavo César Lyra Porto ◽

Bruno Correa Azevedo ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

Cone Beam ◽

Root Canal Filling ◽

Filling Materials ◽

Computed Tomography Images ◽

Root Canal Filling Materials

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LCD and CRT display of storage phosphor plate and limited cone beam computed tomography images for the evaluation of root canal fillings

Clinical Oral Investigations ◽

10.1007/s00784-008-0211-y ◽

2008 ◽

Vol 13 (1) ◽

pp. 37-42 ◽

Cited By ~ 6

Author(s):

B. Güniz Baksı ◽

Elif Soğur ◽

Hans-Göran Gröndahl

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

Cone Beam ◽

Storage Phosphor ◽

Computed Tomography Images ◽

Phosphor Plate

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Root canal segmentation in cone-beam computed tomography

Brazilian Journal of Oral Sciences ◽

10.20396/bjos.v18i0.8657328 ◽

2019 ◽

Vol 18 ◽

pp. e191627

Author(s):

Juliane Freitas Machado ◽

Paula Maciel Pires ◽

Thais Maria Pires dos Santos ◽

Aline de Almeida Neves ◽

Ricardo Tadeu Lopes ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

Gold Standard ◽

Automatic Segmentation ◽

Cone Beam ◽

Micro Ct ◽

Gold Standard Method ◽

Computed Tomography Images ◽

Segmentation Methods

Aim: The purpose of this study was to compare root canal volumes (RCVs) obtained by means of cone beam computed tomography (CBCT) to those obtained by micro-computed tomography (micro-CT) after applying different segmentation algorithms. Methods: Eighteen extracted human teeth with sound root canals were individually scanned in CBCT and micro-CT using specific acquisition parameters. Two different images segmentation strategies were applied to both acquisition methods (a visual and an automatic threshold). From each segmented tooth, the root canal volume was obtained. A paired t-test was used to identify differences between mean values resulted from the experimental groups and the gold standard. In addition, Pearson correlation coefficients and the agreement among the experimental groups with the gold standard were also calculated. The significance level adopted was 5%. Results: No statistical differences between the segmentation methods (visual and automatic) were observed for micro-CT acquired images. However, significant differences for the two segmentation methods tested were seen when CBCT acquired images were compared with the micro-CT automatic segmentation methods used. In general, an overestimation of the values in the visual method were observed while an underestimation was observed with the automatic segmentation algorithm. Conclusion: Cone beam computed tomography images acquired with parameters used in the present study resulted in low agreement with root canal volumes obtained with a micro-CT tomography gold standard method of RCV calculation.

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Method for determination of root curvature radius using cone-beam computed tomography images

Brazilian Dental Journal ◽

10.1590/s0103-64402008000200005 ◽

2008 ◽

Vol 19 (2) ◽

pp. 114-118 ◽

Cited By ~ 50

Author(s):

Carlos Estrela ◽

Mike Reis Bueno ◽

Manoel Damião Sousa-Neto ◽

Jesus Djalma Pécora

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

False Negative ◽

Cone Beam ◽

Curvature Radius ◽

Negative Results ◽

Computed Tomography Images ◽

Root Curvature

This article describes and discusses a method to determine root curvature radius by using cone-beam computed tomography (CBCT). The severity of root canal curvature is essential to select instrument and instrumentation technique. The diagnosis and planning of root canal treatment have traditionally been made based on periapical radiography. However, the higher accuracy of CBCT images to identify anatomic and pathologic alterations compared to panoramic and periapical radiographs has been shown to reduce the incidence of false-negative results. In high-resolution images, the measurement of root curvature radius can be obtained by circumcenter. Based on 3 mathematical points determined with the working tools of Planimp® software, it is possible to calculate root curvature radius in both apical and coronal directions. The CBCT-aided method for determination of root curvature radius presented in this article is easy to perform, reproducible and allows a more reliable and predictable endodontic planning, which reflects directly on a more efficacious preparation of curved root canals.

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Cone-beam computed tomography study of root number and root canal configuration of premolars in Serbian population

Medicinski pregled ◽

10.2298/mpns1804100p ◽

2018 ◽

Vol 71 (3-4) ◽

pp. 100-107 ◽

Cited By ~ 1

Author(s):

Milica Popovic ◽

Milos Papic ◽

Aleksandar Acovic ◽

Suzana Zivanovic ◽

Tatjana Kanjevac

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

Statistical Significance ◽

Preoperative Assessment ◽

Cone Beam ◽

Type I ◽

Root Canals ◽

Type Iv ◽

Computed Tomography Images

Introduction. The aim of this study was to establish the number of roots and present the root canal configuration in the maxillary and mandibular premolar teeth, and evaluate the relations among these characteristics with gender and teeth position in the Serbian population using cone-beam computed tomography. Material and Methods. Cone-beam computed tomography images of 570 teeth of 150 patients were evaluated. Teeth were classified into the following groups: maxillary first premolars, maxillary second premolars, mandibular first premolars and mandibular second premolars, and the number of roots and root canals per tooth, whereas root canal configurations were examined along with the tooth position and patients? gender. The root canal configuration was classified using Vertucci?s classification. Statistical significance was obtained using Chi square test. Results. In maxillary first premolars, two roots (53.5%) and two root canals (84.5%) were the most prevalent, as well as type IV configuration (58.9%). In maxillary second premolars, most teeth had one root (88.1%) and one root canal (59.6%). In regard to gender, complex configurations with multiple canals were more prevalent in males. Higher incidence of type IV configuration in maxillary first premolars was present on the right side of the jaw (70.2%). Most mandibular first premolars had one root (98.5%). In mandibular second premolar, all teeth had one root and most had type I configuration (96.2%). Males showed higher incidence of two canals in mandibular first premolars. Conclusion. Cone-beam computed tomography is a useful tool for obtaining valuable information on root canal morphology of premolar teeth. Patient?s gender should be considered when performing the preoperative assessment of endodontic treatment.

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