Three-Dimensional Analysis of Root Anatomy and Root Canal Curvature in Mandibular Incisors Using Micro-Computed Tomography with Novel Software

Root canal treatment of mandibular incisor is difficult because of the narrow pulp space and apical curvature. The aim of this study was to measure the anatomical indicators of the mandibular incisors in Koreans using micro-computed tomography (MCT) with novel software (Kappa 2). The MCT-scanned data from 27 mandibular incisors were reconstructed and analyzed. For each canal, 3-dimensional (3D) surface models were re-sliced at 0.1 mm intervals perpendicular to the central axis of the root canal. Root canal width, dentine thickness, and direction and degree of root canal curvatures were measured automatically on each slice. Measurements were analyzed statistically with Bhapkar test, Friedman test, and Wilcoxon signed rank test. Labial and lingual dentine thicknesses were significantly larger than mesial and distal thicknesses (p < 0.001). The thinnest dentine was mainly located on the mesio-lingual side of the canals in the apical third. The mean narrowest and widest canal width in the apical sixth were 0.22 mm and 0.40 mm, respectively. The canal curvature abruptly increased in the apical 0.5-mm portion. MCT with novel software provided useful anatomical information for root canal instrumentation.

Download Full-text

Three-dimensional modelling and concurrent measurements of root anatomy in mandibular first molar mesial roots using micro-computed tomography

International Endodontic Journal ◽

10.1111/iej.12326 ◽

2014 ◽

Vol 48 (4) ◽

pp. 380-389 ◽

Cited By ~ 16

Author(s):

J. K. Lee ◽

Y. J. Yoo ◽

H. Perinpanayagam ◽

B. H. Ha ◽

S. M. Lim ◽

...

Keyword(s):

Computed Tomography ◽

Three Dimensional ◽

Root Anatomy ◽

Micro Computed Tomography ◽

Mandibular First Molar

Download Full-text

Comparison of Micro-Computed Tomography and Digital Intraoral Radiography to Determine the Accuracy of Digital Radiographic Measurements of Mandibular Molar Teeth in Dogs

Journal of Veterinary Dentistry ◽

10.1177/0898756417733327 ◽

2017 ◽

Vol 34 (4) ◽

pp. 248-258

Author(s):

Louise Marron ◽

Jennifer Rawlinson ◽

Kirk McGilvray ◽

Ben Prytherch

Keyword(s):

Computed Tomography ◽

Root Canal ◽

Intraoral Radiography ◽

Structural Representation ◽

Micro Computed Tomography ◽

Radiographic Measurements ◽

Canal Width ◽

Mandibular Molar ◽

Molar Teeth ◽

Digital Intraoral Radiography

Introduction: The purpose of this study was to compare root and root canal width measurements between digital intraoral radiography (IOR) and micro-computed tomography (μCT). The accuracy of IOR measurements of canine mandibular molars was scrutinized to assess feasibility of developing a model to estimate animal age based on dentinal thickness. Materials and Methods: Thirty-nine canine mandibular first molars were imaged using μCT and IOR. For each tooth, the root and root canal width of the mesial and distal roots were measured by a single observer at 3 marked sites on μCT and IOR. Two different software programs were used to measure the radiographs. The radiograph measurements were compared to each other and to the μCT measurements. The μCT images were considered the anatomic reference standard for structural representation. Results: The data collected demonstrated IOR bias and variability throughout all measurement sites, with some sites being more affected than others. Neither IOR system produced unbiased measurements that closely reflected the μCT measurements consistently. The overall lack of agreement between measurements demonstrated the difficulties in developing a standardized protocol for measuring root and root canal width for the first molar teeth in dogs. Conclusion: Developing a protocol to accurately measure and compare μCT and IOR measurements is challenging. Designing a measurement system that would allow for universal application to age dogs would require continued research utilizing a standardized approach to overcome the limitations identified in this article.

Download Full-text

Three-dimensional analysis of coronal root canal morphology of 136 permanent mandibular first molars by micro-computed tomography

Journal of Dental Sciences ◽

10.1016/j.jds.2021.07.021 ◽

2021 ◽

Author(s):

Yujie Fu ◽

Yuan Gao ◽

Yuxuan Gao ◽

Xuelian Tan ◽

Lan Zhang ◽

...

Keyword(s):

Computed Tomography ◽

Dimensional Analysis ◽

Root Canal ◽

Three Dimensional ◽

Micro Computed Tomography ◽

Root Canal Morphology ◽

Canal Morphology

Download Full-text

Quantitative Three-Dimensional Analysis of Root Canal Curvature in Maxillary First Molars Using Micro-Computed Tomography

Journal of Endodontics ◽

10.1016/j.joen.2006.04.012 ◽

2006 ◽

Vol 32 (10) ◽

pp. 941-945 ◽

Cited By ~ 43

Author(s):

Jong-Ki Lee ◽

Byung-Hyun Ha ◽

Jeong-Ho Choi ◽

Seok-Mo Heo ◽

Hiran Perinpanayagam

Keyword(s):

Computed Tomography ◽

Dimensional Analysis ◽

Root Canal ◽

Three Dimensional ◽

Micro Computed Tomography

Download Full-text

The Quality of Root Canal Preparation in Canals Treated with Rotary versus Self-adjusting Files: A Three-Dimensional Micro-Computed Tomography Study

Iraqi Dental Journal ◽

10.26477/idj.v36i3.29 ◽

2014 ◽

Vol 36 (3) ◽

pp. 137

Author(s):

Diyar Kh. Baker ◽

Basam K. Amin ◽

Sazan Sh. Saleem

Keyword(s):

Computed Tomography ◽

Root Canal ◽

Three Dimensional ◽

Micro Computed Tomography ◽

Root Canal Preparation

Download Full-text

Continuous Measurement of Three-Dimensional Root Canal Curvature Using Cone-Beam Computed and Micro-Computed Tomography: A Comparative Study

Dentistry Journal ◽

10.3390/dj8010016 ◽

2020 ◽

Vol 8 (1) ◽

pp. 16 ◽

Cited By ~ 1

Author(s):

Michael Kucher ◽

Martin Dannemann ◽

Niels Modler ◽

Dominik Haim ◽

Christian Hannig ◽

...

Keyword(s):

Computed Tomography ◽

Root Canal ◽

Three Dimensional ◽

Cone Beam ◽

Imaging Data ◽

Micro Computed Tomography ◽

Tomographic Images ◽

Root Canals ◽

Centre Line ◽

Spline Curves

The knowledge of root canal curvature is crucial regarding the prevention of ledge formation, root perforation and the possibility of endodontic instruments’ fracture during endodontic treatments. Therefore, a quantification method of the root canal curvature as well as the applicability of diagnostically relevant tomographic three-dimensional (3D) imaging data is necessary. Hereby, cone-beam computed tomography (CBCT) images and micro-computed tomography (µCT) data of distal root canals were analysed concerning the continuous three-dimensional curvature of human mandibular molars ( n = 50). The curvature of the canal’s three-dimensional centre line was determined by evaluating the tomographic images. The centroids of each root canal slice were identified and approximated by spline curves to obtain the centre line and therefore, its curvature. Comparing the results evaluated from CBCT and µCT images, minimum radii of curvature of 2.6 mm and 2.1 mm were determined, respectively. The observation of the centre line demonstrated the requirement of the three-dimensional imaging data from CBCT and µCT for a reliable curvature analysis. Conclusively, the evaluation of CBCT and µCT images results in comparable radii of curvature. Thus, the application of the introduced method in combination with CBCT applied to patient cases could offer an important preliminary diagnostical step to prevent endodontic treatment complications.

Download Full-text