The analysis of treatment results of chronic apical periodontitis

10.12737/4797 ◽  
2014 ◽  
Vol 8 (1) ◽  
pp. 1-4
Author(s):  
Шалаев ◽  
O. Shalaev ◽  
Некрылов ◽  
D. Nekrylov ◽  
Селина ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Apical Periodontitis ◽  
Long Term Results ◽  
Cone Beam ◽  
Treatment Results ◽  
X Ray ◽  
Periodontal Tissues ◽  
Study Results

Forms of chronic periodontitis, treatment results and long-term results are traditionally defined on the basis of X-ray examination. Today, the most modern and reliable method for diagnostic X-ray examination opportunities in dentistry is dental cone-beam computed tomography. In comparison with other methods of X-ray examination in dentistry the method of dental cone-beam computed tomography has a number of advantages: the ability to make measurements of distances, the density of solid tissue, angles and areas in any part of the data at any angle, at any height, length, width up to 0,125 mm due to the fact that the area research scan 1 to 1; working image can be enlarged, moved, inverted, modified for clarity, brightness and contrast. dental cone-beam computed tomography method allows to detect the position, shape, sizes, construction of various structures to determine their topographic anatomic relations with other organs, and tissues. The analysis of the study results of treatment of apical periodontitis in this view doesn’t give a complete picture of the selected comparative method of treatment, which is the foundation for a thorough study of the density of tissue in the apex of the teeth in the long-term period (3-6-12 months). Experience in the use of dental computer tomography showed that it is possible to assess of the areas of destructive changes of the periapical region and periodontal tissues in most cases than traditional x-ray techniques.

A feasibility study of time of flight cone beam computed tomography imaging

2021 ◽  
pp. 1-14
Author(s):  
Ignacio O. Romero ◽  
Changqing Li
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Time Of Flight ◽  
Cone Beam ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Effects ◽  
Breast Phantom ◽  
Scatter Reduction ◽  
Strong Scattering

BACKGROUND: The time of flight (TOF) cone beam computed tomography (CBCT) was recently shown to reduce the X-ray scattering effects by 95%and improve the image CNR by 110%for large volume objects. The advancements in X-ray sources like in compact Free Electron Lasers (FEL) and advancements in detector technology show potential for the TOF method to be feasible in CBCT when imaging large objects. OBJECTIVE: To investigate feasibility and efficacy of TOF CBCT in imaging smaller objects with different targets such as bones and tumors embedded inside the background. METHODS: The TOF method used in this work was verified using a 24cm phantom. Then, the GATE software was used to simulate the CBCT imaging of an 8 cm diameter cylindrical water phantom with two bone targets using a modeled 20 keV quasi-energetic FEL source and various TOF resolutions ranging from 1 to 1000 ps. An inhomogeneous breast phantom of similar size with tumor targets was also imaged using the same system setup. RESULTS: The same results were obtained in the 24cm phantom, which validated the applied CBCT simulation approach. For the case of 8cm cylindrical phantom and bone target, a TOF resolution of 10 ps improved the image contrast-to-noise ratio (CNR) by 57%and reduced the scatter-to-primary ratio (SPR) by 8.63. For the case of breast phantom and tumor target, image CNR was enhanced by 12%and SPR was reduced by 1.35 at 5 ps temporal resolution. CONCLUSIONS: This study indicates that a TOF resolution below 10 ps is required to observe notable enhancements in the image quality and scatter reduction for small objects around 8cm in diameter. The strong scattering targets such as bone can result in substantial improvements by using TOF CBCT.

Workflow-Based Design and Evaluation of a Device for CBCT-Guided Biopsy

2021 ◽  
Vol 15 (3) ◽  
Author(s):  
A. Pfeil ◽  
L. Barbé ◽  
F. Geiskopf ◽  
R. L. Cazzato ◽  
P. Renaud
Keyword(s):  
Computed Tomography ◽  
Remote Control ◽  
Cone Beam Computed Tomography ◽  
Added Value ◽  
Cone Beam ◽  
X Ray ◽  
Novel Device ◽  
Robotic Devices ◽  
Mechanical Devices ◽  
Personalized Cancer

Abstract Biopsies for personalized cancer care can be performed with cone beam computed tomography (CBCT) guidance, but manual needle manipulation remains an issue due to X-ray exposure to physicians. Modern CBCT scanners integrate today real-time imaging and software assistance for needle planning. In this paper, these available features are exploited to design a novel device offering an intermediate level of assistance between simple passive mechanical devices of limited efficiency, and advanced robotic devices requiring adapted procedure workflows. Our resulting system is built to limit its impact on the current manual practice. It is patient-mounted and provides remote control of needle orientation and insertion. A multilayer phantom is specifically developed to reproduce interactions between the needle and soft abdominal tissues. It is used to experimentally evaluate the device added value by comparing assisted versus manual needle insertions. The device is shown to help reducing X-ray exposure by a factor 4, without impacting the accuracy obtained manually.

Assessment of apical periodontitis in relation to quality of root canal fillings and coronal restorations in a Turkish subpopulation: A retrospective cone-beam computed tomography study

2020 ◽  
Vol 10 (2) ◽  
pp. 121
Author(s):  
Seda Falakaloglu ◽  
CerenAktuna Belgin ◽  
LatifeAltınok Uygun ◽  
Özkan Adigüzel
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Root Canal ◽  
Apical Periodontitis ◽  
Cone Beam

Prognosis of root canal treatment in teeth with preoperative apical periodontitis: a study with cone‐beam computed tomography and digital periapical radiography

2019 ◽  
Vol 52 (11) ◽  
pp. 1533-1546 ◽  
Author(s):  
F. A. Restrepo‐Restrepo ◽  
S. J. Cañas‐Jiménez ◽  
R. D. Romero‐Albarracín ◽  
P. A. Villa‐Machado ◽  
M. I. Pérez‐Cano ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Root Canal ◽  
Apical Periodontitis ◽  
Root Canal Treatment ◽  
Cone Beam ◽  
Periapical Radiography

Quantitative measurement of gas hold-up distribution in a stirred chemical reactor using X-ray cone-beam computed tomography

2008 ◽  
Vol 139 (2) ◽  
pp. 351-362 ◽  
Author(s):  
Stephan Boden ◽  
Martina Bieberle ◽  
Uwe Hampel
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Quantitative Measurement ◽  
Chemical Reactor ◽  
Cone Beam ◽  
X Ray

scholarly journals Long-Term Postoperative Cone-Beam Computed Tomography Analysis of Secondary Bone Grafting in 79 Patients With Unrepaired Alveolar Clefts

2020 ◽  
Vol 78 (7) ◽  
pp. 1164-1170
Author(s):  
Tamir Dean Anver ◽  
Lida Mirzai ◽  
Peng Li ◽  
Kathlyn K. Powell ◽  
Peter D. Waite
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Bone Grafting ◽  
Cone Beam ◽  
Tomography Analysis

scholarly journals Evaluation of the Relationship between Type II Diabetes Mellitus and the Prevalence of Apical Periodontitis in Root-Filled Teeth Using Cone Beam Computed Tomography: An Observational Cross-Sectional Study

2019 ◽  
Vol 28 (6) ◽  
pp. 533-538
Author(s):  
Selen Nihal Sisli
Keyword(s):  
Diabetes Mellitus ◽  
Computed Tomography ◽  
Glycemic Control ◽  
Cone Beam Computed Tomography ◽  
Type Ii Diabetes ◽  
Type Ii Diabetes Mellitus ◽  
Apical Periodontitis ◽  
Cone Beam ◽  
Control Group ◽  
Type Ii

Objective: This study aimed to investigate the prevalence of apical periodontitis (AP) in patients with type II diabetes mellitus (DM) with either optimal glycemic control (OGC) or poor glycemic control (PGC) compared with nondiabetics using cone beam computed tomography (CBCT). Subjects and Methods: The periapical status of 75 teeth with adequate root canal treatment performed at least 1 year ago that could be visualized in the field of view of CBCT images of 43 DM patients (29 females, 14 males) was compared with a control group consisting of 162 teeth of 86 nondiabetics (56 females, 30 males). In addition, the DM group was divided into subgroups according to the patients’ mean glycated hemoglobin level as either having OGC or PGC. The periapical status of the teeth was evaluated using the CBCT periapical index (CBCTPAI), and AP was diagnosed as a CBCTPAI ≥1. χ2, Fisher’s exact test, and independent-samples t tests were used for the statistical analysis, and p < 0.05 was considered significant. Results: Significant differences between the DM group and the control group were observed (p< 0.05) in terms of AP (the frequencies of both CBCTPAI ≥1 and CBCTPAI ≥3) and the frequency of cardiovascular disease, while there were no significant differences between the DM subgroups (p > 0.05). Conclusion: The prevalence of AP and severe bone destruction in periapical tissues was significantly higher in the DM patients compared with the nondiabetic patients.

Optimization of x-ray imaging geometry (with specific application to flat-panel cone-beam computed tomography)

2000 ◽  
Vol 27 (8) ◽  
pp. 1903-1914 ◽  
Author(s):  
Jeffrey H. Siewerdsen ◽  
David A. Jaffray
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Flat Panel ◽  
X Ray ◽  
Imaging Geometry ◽  
X Ray Imaging
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