Micro-computed Tomographic Analysis of the Root Canal Morphology of Mandibular Incisors (original) (raw)
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Morphometric Micro-CT Study of Contralateral Mandibular Incisors
Research Square (Research Square), 2023
Background This study aimed to determine the degree of similarity and symmetry in the anatomy of contralateral mandibular incisors. Three-dimensional (3D) models of extracted teeth were obtained from microtomography (micro-CT) scans. Qualitative and quantitative assessments of the morphology and comparison of contralateral pairs were made. The null hypothesis was that contralateral mandibular incisors could not be considered identical in simple morphometric measurements. Methods Sixty pairs of mandibular incisors were extracted from 30 patients and scanned with micro-CT. Virtual models of the cemento-enamel junction to the root apex were rendered. Parameters such as length, canal width, dentinal thicknesses, tortuosity, centerline length, accessory canals, root canal con gurations, and root canal ori ce cross sections were used to compare the teeth. Width and thickness comparisons between paired teeth in the same individual were made by paired t-test (Wilcoxon Signed Rank Test for variables not normally distributed). An online randomization tool generated randomized pairs (independent of the individual/patient). Subsequently, an unpaired t-test (or Mann-Whitney U test for nonnormally distributed parameters) and a correlation analysis were conducted. Canal con gurations were classi ed according to preexisting classi cation schemes. The number and location of accessory canals and apical foramina were registered and compared. Results Contralateral mandibular incisors showed high similarity in the selected linear parameters (lengths, widths, and thicknesses). The apical third showed a high degree of inter-variability for the contralateral pairs. The comprehensive statistical analysis of the normalized parameters by Z score showed no statistically signi cant differences between the contralateral mandibular incisors. Conclusions The ndings of this study further establish the signi cant similarities between contralateral mandibular incisors, reinforcing their suitability as a reliable substrate for root canal comparison studies.
Assessment of the Root Canal Similarity in Contralateral Mandibular Incisors
International Dental Journal, 2022
Introduction The purpose of this study was to determine the degree of similarity between contralateral mandibular incisors utilising 3-dimensional (3D) models obtained from micro-computed tomographic (micro-CT) scans of extracted human teeth. The null hypothesis was that contralateral mandibular incisors do not exhibit matching symmetry. Methods Sixty pairs (n = 120) of extracted mandibular incisors were obtained from 30 patients and scanned with micro-CT with a voxel size of 15.0 μm. 3D virtual models of the pulpal cavities were rendered. Geometric morphometric deviation analysis was performed after mirroring, automatic alignment, and co-registration of the models of contralateral teeth root mean square (RMS) errors were calculated. The quantitative analysis of the 3D models included 6 different geometric parameters. Data sets were examined with a 2-sample Kolmogorov–Smirnov test. Post hoc retrospective power analysis was performed to find statistical power (α = 0.05). Results Contralateral pairs had a narrower distribution in deviation than random pairs. Also, contralateral pairs showed a statistically higher similarity coefficient (5 out of 6 geometric parameters) compared to random pairs (P < .001); no difference was found when comparing central to lateral pairs or between Vertucci type I configurations compared to non-type I. RMS errors had significantly lower Contralateral premolars (CPs) values than random pairs (P < .001). Conclusions A high degree of similarity was demonstrated for pairing contralateral mandibular incisors using 3D models. The similarity between contralateral central and lateral incisors suggests that when screened and matched, these 4 teeth might be used in endodontic research where similar root canal anatomy is crucial.
External and Internal Anatomy of Mandibular Permanent Incisors
A clear understanding of dental root anatomy, external and internal, is an essential prerequisite to all dental procedures. In periodontology, the external root morphology has been proven to have a clinical significance in the predisposing factors of periodontal diseases. Orthodontic literature shows the importance of radicular anatomy in orthodontic mechanics through the concept of anchorage. The significance of internal root anatomy has been emphasized by studies demonstrating that variations in canal geometry before cleaning, shaping, and obturation procedures had a greater effect on the outcome than the techniques themselves. The mandibular central incisor is the smallest tooth in the mouth, but the buccolingual dimension of its root is very large. This tooth is usually single-rooted; however, the root canal system of this group is unpredictable. The incidence of two canals has been reported as low as 0.3% and as high as 45.3%. The wide range of variation reported in literature regarding the prevalence of a second canal has been related to methodological and racial differences. This chapter will summarize the morphological aspects of the root canal anatomy published in the literature of the anterior mandibular teeth. This will provide precious knowledge regarding root canal morphology and its variation among populations.
Evaluation of the Morphology of Mandibular Incisors
Journal of oral medicine, 2021
Citation: Aljafari AA (2021) Evaluation of the Morphology of Mandibular Incisors . J Ora Med Vol.5 No.5:e112. One of the foremost vital factors within the success of passage treatment is that the data regarding the foundation canal system anatomy. Among the foremost reasons for the failure of the treatment, one will name the dearth of data regarding pulp anatomy, solely the second to inaccurate identification and treatment arrange. Though specific anatomy is considered the foremost common kind for every tooth in several textbooks, there exists an excellent anatomical diversity regarding the foundation canal system. Today, picture taking analysis in endodontic is essentially restricted to standard intraoral and broad radiographs. Intraoral radiographs give helpful info regarding the presence and site of periapical lesions, passage anatomy, and proximity to anatomical structures. However, the two-dimensional nature of the created pictures poses bound limitations in terms of anatomic d...
2006 Al Qudah - Root canal morphology of mandibular incisors
Al-Qudah AA, Awawdeh LA. Root canal morphology of mandibular incisors in a Jordanian population. International Endodontic Journal, 39, 873-877, 2006. Aim To investigate the root canal morphology of mandibular incisors in a Jordanian population using a canal staining and tooth-clearing technique. Methodology Four hundred and fifty extracted mandibular incisors were collected from dental clinics within north Jordan. Following pulp tissue removal and staining of the canal systems, the teeth were decalcified with 5% nitric acid, dehydrated with ascending concentrations of alcohol and rendered clear by immersion in methyl salicylate. Cleared teeth were examined by eye and the following features were evaluated:
Effectiveness of three methods for evaluating root canal anatomy of mandibular incisors
This study compared the effectiveness of clinical observation, clinical microscopic observation , and tooth-clearing technique in determining the number of canals in mandibular incisors. Root canal ramifications were also analyzed. Using clinical and microscopic analyses, we determined the number of canal entrances in 277 mandibular incisors. In addition , tooth-clearing technique was used to determine the number of canals and frequency of ramifications in the samples. The kappa coefficient was used to compare the different methods with regard to frequency of canals. Most teeth had one canal entrance. The proportion of teeth with two canals was 23.5% by tooth-clearing analysis, 5.8% by clinical microscopy, and 1.1% by clinical analysis. A large number of samples had some type of ramification (40.1%), and most ramifications were present in teeth with two canals. The most frequent ramification was lateral canals (8.3%). Clinical microscopy improved identification of a second canal in mandibular inci-sors. However, it did not identify second canals in all teeth with two canals. (J Oral Sci 58, 347-351, 2016)
Pakistan Journal of Medical Sciences
Objectives: To investigate the prevalence of additional canals and the occurrence of oval canals in apical third area of mandibular permanent incisors of Saudi sub-population. Methods: This study was conducted from November 2020 to May 2021 at College of Dentistry, Qassim University. For the investigation purpose of this study, 314 scans were analyzed within the age limits of 13 to 70 years. The root canal morphology, presence of oval canals, number of roots, and prevalence of various canal configurations based on age, gender and bilateral symmetry were recorded. The obtained data was statistically analyzed using SPSS software. Results: The mandibular central incisors (CI) exhibited, significant difference between Type-I, II, III and IV canal configurations and Type-I, II, III and V canal configurations (p < 0.05). For the mandibular lateral incisor (LI), significant difference was found between Type-I, II, III, IV and VII canal configurations (p < 0.05). The cumulative preval...
Journal of endodontics, 2006
The purpose of this study was to investigate three-dimensional (3-D) morphology of C-shaped root canal system using micro-computed tomography (microCT) and 3-D reconstruction. There were 102 extracted mandibular second molars with fused roots collected from a native Chinese population. The teeth were scanned by microCT and reconstructed by 3-D software. The 98 teeth that possessed a C-shaped canal system were further analyzed. The 3-D reconstructed images of canals were classified into three categories: merging type (type I), symmetrical type (type II), and asymmetrical type (type III). The cross-sectional images of each tooth were submitted to computer analysis, and the minimum canal wall thickness was measured. In these 98 molars, 32 (32.65%) teeth showed a merging type appearance, 38 (38.78%) a symmetrical type and 28 (28.57%) an asymmetrical type. The minimum canal wall thickness in type I was thicker than that in type II or type III in the apical and middle portion (p < 0.05...
Anatomic Variations And Anomalies in Mandibular Central Incisors
Majority of the anatomical studies have found that Mandibular Central Incisors are single rooted teeth with single canal. Permanent Mandibular Central Incisor is rarely affected by tooth shape anomalies of crown and root. This Paper aims in providing anatomical variations and anomalies in mandibular Central incisor teeth as failure to recognize unusual root canal anatomy may lead to unsuccessful endodontic treatment. Hence it is mandatory for a dentist to be updated with this kind of variations and anomalies in teeth.