Applicability of Cone Beam Computed Tomography to the Assessment of the Vocal Tract before and after Vocal Exercises in Normal Subjects

During the course of this experimental study tomograms of extracted teeth were analyzed before and after filling the root canals with an endodontic material and fragments of broken metal instruments for root canal treatment. During the first stage of the experiment, untreated extracted teeth were scanned using conebeam computed tomography and microfocus cone-beam computed tomography. A comparative assessment of capabilities of the two methods of cone-beam computed tomography based on examination of untreated root canals was carried out. The second part of the study is dedicated to visualization of root canals that contain foreign high-density materials.

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Comparative evaluation of shaping ability of trunatomy and protaper gold files in curved canals using cone?beam computed tomography: An invitro study

IP Indian Journal of Conservative and Endodontics ◽

10.18231/j.ijce.2021.023 ◽

2021 ◽

Vol 6 (2) ◽

pp. 101-105

Author(s):

Kadam Krutika Kiran ◽

Vagarali Hemant ◽

Pujar Madhu A ◽

Tamase Aishwarya S ◽

Sahana Umesh

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

Cone Beam ◽

Human Teeth ◽

Root Canals ◽

Before And After ◽

Canal Transportation ◽

Group 2 ◽

Shaping Ability

This study aimed to compare the canal transportation and canal centering ability in the preparation of curved root canals after instrumentation with TruNatomy (TN) (TN; Dentsply Sirona, Maillefer, Ballaigues, Switzerland) and ProTaper Gold (PG) (PG; Dentsply, Tulsa Dental Specialties, Tulsa, OK, USA) files using cone‑beam computed tomography (CBCT). 30 Single rooted extracted human teeth with root curvature ranging from 20-30° according to Schneider’s method were selected. Teeth with any visible cracks or fractures, calcifications, previous root canal treatments were excluded. The teeth were randomly assigned into two groups i.e. Group 1-TN and Group 2-PG (n = 15 each). The teeth were instrumented according to manufacturer’s guidelines for both the groups. Canals were scanned using a CBCT scanner before and after preparation to evaluate the transportation and centering ratio at 3 mm, 5 mm, and 7 mm from the apex. The data analysis was done using SPSS software and the test used was independent sample t test for comparison between the 2 groups.Data obtained suggested that TN group presented lesser canal transportation at the middle third of the root. The PG group showed better centering abitily at apical third of the root canal when both the groups were compared. TN resulted in less transportation than PG at the middle third, and PG showed better centering ability at the apical third. Overall, both systems safely prepared root canals, causing minimal errors.

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Evaluation of transverse maxillary growth on cone-beam computed tomography images

Scientific Reports ◽

10.1038/s41598-021-97082-0 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Brandon J. Seubert ◽

Laurence Gaalaas ◽

Brent E. Larson ◽

Thorsten Grünheid

Keyword(s):

Computed Tomography ◽

Nasal Cavity ◽

Cone Beam Computed Tomography ◽

Cone Beam ◽

Long Term Effects ◽

Maxillary Expansion ◽

Computed Tomography Images ◽

Before And After ◽

Annual Changes ◽

Lateral Walls

AbstractThis study aimed at quantifying the annual transverse growth of the maxilla using skeletal landmarks in three different regions on cone-beam computed tomography (CBCT) scans. CBCT scans taken before and after orthodontic treatment of 100 child and adolescent patients (50 male, 50 female) without maxillary transverse deficiencies were used to determine the transverse linear distances between the greater palatine foramina (GPFd), the lateral walls of the nasal cavity (NCd), and the infraorbital foramina (IOFd). We found that all distances increased significantly with growth in both genders (p < 0.001). The overall average annual change was 0.5 mm for GPFd, 0.3 mm for NCd, and 0.7 mm for IOFd. Males generally had greater annual changes than females for GPFd and IOFd, but not NCd. There were weak, statistically not significant (p > 0.05) correlations between patient age and the annual changes in GPFd, NCd, and IOFd. These results suggest that the positions of the greater palatine foramina, the lateral walls of the nasal cavity, and the infraorbital foramina change consistently with maxillary transverse growth. Clinicians can use the growth rates as population averages to more confidently estimate the amount of skeletal transverse deficiency or evaluate the long-term effects of maxillary expansion treatment.

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Validation of cone beam computed tomography as a clinical imaging method for dentin thickness measurement in the danger zone of mandibular molars

Revista da Faculdade de Odontologia - UPF ◽

10.5335/rfo.v23i1.8497 ◽

2018 ◽

Vol 23 (1) ◽

Author(s):

Fernanda Gomez Corrêa ◽

Claudia Bohrer Flores ◽

Flávia Kolling Marquezan ◽

Gabriela Salatino Liedke ◽

Gustavo Nogara Dotto ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Thickness Measurement ◽

Cone Beam ◽

Imaging Method ◽

Danger Zone ◽

Mean Values ◽

Mandibular Molars ◽

Before And After ◽

Dentin Thickness

Objective: to verify the accuracy of cone beam computedtomography (CBCT) for measuring dentin thicknessin the danger zone of mandibular molars in order to validatethis method to be used as a clinical auxiliary. Materialsand method: dentin thickness of the distal wall ofmesial canals was measured at 2 mm of furcation areain ten mandibular molars before and after preparation ofcervical and middle thirds. CBCT (0.25 mm voxel size)and stereomicroscopy images were acquired twice foreach sample. CBCT axial images and stereomicroscopeimages were evaluated by a calibrated examiner. Statisticalanalysis was performed using Mann-Whitney testin order to investigate whether CBCT images providedtrusted values. Results: mean values of initial (1.23 versus1.24 mm) and final measurements (0.88 versus 0.87mm) obtained with, respectively, CBCT and stereomicroscopemethods did not show statistical differences(P > 0.5). Conclusion: CBCT images provide high accuracyfor measuring dentin thickness in the danger zoneof mandibular molars.Keywords: Cone beam computed tomography. Endodontics.Root canal preparation.

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Feasibility of Cone-beam Computed Tomography in Detecting Lateral Canals before and after Root Canal Treatment: An Ex Vivo Study

Journal of Endodontics ◽

10.1016/j.joen.2017.01.025 ◽

2017 ◽

Vol 43 (6) ◽

pp. 1014-1017 ◽

Cited By ~ 5

Author(s):

Thiago Oliveira Sousa ◽

Bassam Hassan ◽

Hesam Mirmohammadi ◽

Hagay Shemesh ◽

Francisco Haiter-Neto

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

Ex Vivo ◽

Root Canal Treatment ◽

Cone Beam ◽

Before And After ◽

Ex Vivo Study

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Can Cone-beam Computed Tomography Change Endodontists' Level of Confidence in Diagnosis and Treatment Planning? A Before and After Study

Journal of Endodontics ◽

10.1016/j.joen.2019.10.021 ◽

2020 ◽

Vol 46 (2) ◽

pp. 283-288 ◽

Cited By ~ 2

Author(s):

Ana Márcia Viana Wanzeler ◽

Francisco Montagner ◽

Henrique Timm Vieira ◽

Heraldo Luis Dias da Silveira ◽

Nádia Assein Arús ◽

...

Keyword(s):

Computed Tomography ◽

Treatment Planning ◽

Cone Beam Computed Tomography ◽

Diagnosis And Treatment ◽

Cone Beam ◽

Level Of Confidence ◽

Before And After ◽

Before And After Study

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Cone beam computed tomography evaluation of distance from cementoenamel junction to alveolar crest before and after nonextraction orthodontic treatment

The Angle Orthodontist ◽

10.2319/040815-235.1 ◽

2015 ◽

Vol 86 (4) ◽

pp. 543-549 ◽

Cited By ~ 15

Author(s):

Luma O. Castro ◽

Iury O. Castro ◽

Ana Helena G. de Alencar ◽

José Valladares-Neto ◽

Carlos Estrela

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Orthodontic Treatment ◽

Alveolar Bone ◽

Software Tool ◽

Wilcoxon Test ◽

Cone Beam ◽

Before And After ◽

Level Of Significance ◽

Study Database

ABSTRACT Objective: To evaluate the distance between the cementoenamel junction and the alveolar bone crest before and after orthodontic treatment using cone beam computed tomography (CBCT). Materials and Methods: The sample comprised 30 patients with Angle Class I malocclusion and mild to moderate crowding. The study database comprised dental CBCT scans obtained before and after orthodontic treatment. The distance between the cementoenamel junction to the bone crest of the buccal (n = 720) and lingual (n = 720) surfaces was measured in 24 teeth for each patient using a specific software tool (Xoran version 3.1.62). The Wilcoxon test was used for statistical analysis, and the level of significance was set at P < .05. Results: The distance between the cementoenamel junction and the bone crest increased in 822 (57%) of the 1440 surfaces after orthodontic treatment. The buccal surface of the lower central incisors had the greatest frequency of increased distance (75%), and the lingual surface of lateral incisors had the lowest (40%). The distance between the cementoenamel junction and the alveolar bone crest was greater than 2 mm (alveolar bone dehiscence) in 162 (11%) of the 1440 surfaces before orthodontic treatment and in 279 (19%) after treatment. Conclusions: The distance from the cementoenamel junction to the bone crest changed after orthodontic treatment; the distance was greater than 2 mm in 11% of the surfaces before treatment and in 19% after treatment.

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A Comparison of Cone Beam Computed Tomography and Periapical Digital Radiography for Evaluation of Root Canal Preparation

Applied Sciences ◽

10.3390/app11146599 ◽

2021 ◽

Vol 11 (14) ◽

pp. 6599

Author(s):

Khoa Van Pham

Keyword(s):

Computed Tomography ◽

Digital Radiography ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

Cone Beam ◽

Root Canal Preparation ◽

Radiographic Images ◽

Digital Radiograph ◽

Working Length ◽

Before And After

The aim of the present study is to compare cone beam computed tomography and periapical digital radiography for the evaluation of root canal preparation. Nine extracted human molars were used in this study. Following access cavity preparation, mesio-buccal roots of maxillary and mesial roots of mandibular molars were prepared and the remaining roots were cut off. Three amalgam cavities were prepared on the coronal part of the teeth and were filled with amalgam to be used as landmarks. Specimens were scanned using cone-beam computed tomography and periapical digital radiograph images were obtained before and after root canal preparation. WaveOne Gold Primary was used for root canal preparation to full working length. Specimens were then scanned using CBCT and a periapical radiograph for the after-instrumentation images. The transportation and centering ratio were measured and calculated on the CBCT and periapical radiographic images. The Bland–Altman method was used for detecting the bias in the evaluation of agreement between the two methods’ measurements. There was agreement between the two methods’ measurements using CBCT scans and periapical digital radiographic images in the evaluation of transportation and centering ratio parameters. The two methods could be used interchangeably in measurements of transportation and calculating the centering ratio.

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Determination of Root Canal Cleanliness by Different Irrigation Methods and Morphometric Analysis of Apical Third

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1704 ◽

2015 ◽

Vol 16 (6) ◽

pp. 442-450 ◽

Cited By ~ 1

Author(s):

Carlos Estrela ◽

Fábio Heredia Seixas ◽

Mike Reis Bueno ◽

Manoel Damião Sousa-Neto ◽

Jesus Djalma Pécora

Keyword(s):

Computed Tomography ◽

Morphometric Analysis ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

Cone Beam ◽

Preparation Technique ◽

Irrigation Methods ◽

Significant Difference ◽

Before And After

ABSTRACT Aim The aim of this study was to determine the root canal area before and after the instrumentation 1 mm short of the apical foramen by clinical and cone beam computed tomography (CBCT) methods, and to evaluate the cleanliness of the apical region in mesiodistal flattened teeth by using optical microscopy. Materials and methods Forty-two human single-canal mandibular incisors were instrumented using the Free Tip Preparation technique up to three, four or five instruments from the initial. Cone beam computed tomography scans were acquired of the samples before and after root canal preparation (RCP). Irrigation was performed by conventional or hydrodynamic means, using 2.5% sodium hypochlorite. The samples were prepared for observation under an optical microscope. Images were digitally obtained, analyzed and the results were submitted to statistical analysis (two-way ANOVA complemented by Bonferroni's post-test). Results There was no significant difference between the studied anatomical areas with both CBCT and clinical methods. There were no differences between irrigation methods. It was verified differences between instrumentation techniques. Instrumentation with four instruments from the initial instrument determined a significant increase in the contact area when compared to preparation with three instruments, but RCP with 5 instruments did not result in a better cleanliness. Conclusion The analysis with CBCT was not capable to determine the precise shape of surgical apical area comparing to the clinical method. Clinical significance Both the conventional and hydrodynamic irrigation techniques were not able to promote root canals debris-free. The instruments action in root canal walls was proportional to the number of instruments used from the initial apical instrument. How to cite this article Seixas FH, Estrela C, Bueno MR, Sousa-Neto MD, Pécora JD. Determination of Root Canal Cleanliness by Different Irrigation Methods and Morphometric Analysis of Apical Third. J Contemp Dent Pract 2015;16(6):442-450.

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