Inaccuracy of buccal bone thickness estimation on cone‐beam CT due to implant blooming: An ex‐vivo study

2019 ◽  
Vol 46 (11) ◽  
pp. 1134-1143 ◽  
Author(s):  
Tony Vanderstuyft ◽  
Mihai Tarce ◽  
Bahoz Sanaan ◽  
Reinhilde Jacobs ◽  
Karla de Faria Vasconcelos ◽  
...  
Keyword(s):  
Ex Vivo ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Bone Thickness ◽  
Thickness Estimation ◽  
Ex Vivo Study

Tooth and root size as determined from 0.25- and 0.30-mm voxel size cone-beam CT imaging when contrasted to micro-CT scans (0.06 mm): An ex vivo study

2021 ◽  
pp. 146531252110661
Author(s):  
Gaston F Coutsiers Morell ◽  
Yuli Berlin-Broner ◽  
Carlos Flores-Mir ◽  
Giseon Heo
Keyword(s):  
Repeated Measures ◽  
Root Resorption ◽  
Ex Vivo ◽  
Imaging Modality ◽  
Cone Beam Ct ◽  
Three Dimensional ◽  
Cone Beam ◽  
Micro Ct ◽  
Voxel Size ◽  
Ex Vivo Study

Objective: To quantify tooth volume differences from extracted teeth when using three different three-dimensional (3D) computed tomography (CT)-based imaging modalities. Design: Ex vivo study. Setting: Laboratory and clinics of the University of Alberta. Methods: Cone-beam CT (CBCT) of 12 extracted teeth were scanned using 0.25- and 0.30-mm voxel size from CBCT and a 0.06-mm voxel size from micro-CT (reference standard). 3D reconstructions for each tooth from each imaging modality were made through the software ITK-SNAP®. The mean volume differences between each pair of scanning modalities were calculated and then compared and analysed through a repeated measures ANOVA. Results: The average overestimations of the teeth volume were 15.2% for the high-resolution CBCT and 28.1% for the low-resolution CBCT compared to micro-CT measurements. The differences in absolute volume were 81.6 mm3 and 152.8 mm3, respectively. All differences were statistically significant ( P < 0.05). Conclusions: Orthodontists and researchers who assess root resorption through CBCT imaging should be aware that the depicted volumes may likely be overestimating tooth volume and camouflaging real root volumetric treatment changes.

Influence of the exomass on the detection of simulated root fracture in cone-beam ct – an ex-vivo study

2020 ◽  
pp. 20200450
Author(s):  
Amanda Pelegrin Candemil ◽  
Francesca Mangione ◽  
Karla Farias Vasconcelos ◽  
Anne Caroline Oenning ◽  
Reinhilde Jacobs ◽  
...  
Keyword(s):  
Ex Vivo ◽  
Cone Beam Ct ◽  
Receiver Operating Curve ◽  
Cone Beam ◽  
Metallic Materials ◽  
Root Fracture ◽  
Vertical Root Fracture ◽  
Metal Artefacts ◽  
Sensitivity Specificity ◽  
Ex Vivo Study

Objectives: To evaluate the influence of exomass-related metal artefacts on the detection of simulated vertical root fracture (VRF) in cone-beam computed tomography (CBCT). Methods: Twenty teeth were endodontically instrumented and VRF was induced in half of them. All teeth were individually placed in an empty socket of a human mandible. Metallic materials were differently arranged in the exomass [zone outside of the field of view (FOV) but between the X-ray source and the receptor] and/or endomass (zone inside of the FOV), and CBCT scans were obtained. Four radiologists evaluated the presence of VRF using a 5-point scale. Sensitivity, specificity, and area under the receiver operating curve (AUC) were compared using ANOVA. Also, the tooth of interest was replaced with a tube filled with a radiopaque solution and all CBCT scans were repeated to analyse the data objectively. Mean grey and noise values were obtained from the tube and compared using ANOVA followed by Tukey’s test (α = 0.05). Results: Mean grey values were significantly lower and noise was significantly higher when metallic materials were present in the endomass or both the exomass and endomass. Sensitivity, specificity, and AUC were not influenced by the artefacts from the metallic materials irrespective of the arrangement condition. Conclusions: Exomass-related metal artefacts did not influence the diagnosis of simulated VRF in CBCT.

scholarly journals An ex vivo study of automated motion artefact correction and the impact on cone beam CT image quality and interpretability

2018 ◽  
pp. 20180013 ◽  
Author(s):  
Rubens Spin-Neto ◽  
Louise H Matzen ◽  
Lars W Schropp ◽  
Thomas S Sørensen ◽  
Ann Wenzel
Keyword(s):  
Image Quality ◽  
Ex Vivo ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Ct Image ◽  
Motion Artefact ◽  
Ct Image Quality ◽  
The Impact ◽  
Ex Vivo Study ◽  
Artefact Correction

Efficacy of Different Cone-beam Computed Tomographic Protocols in the Identification of Mesiobuccal Canals of Maxillary First Molars: A Tomographic and Ex Vivo Study

2017 ◽  
Vol 43 (5) ◽  
pp. 810-815 ◽  
Author(s):  
Jéssica Vavassori de Freitas ◽  
Flares Baratto-Filho ◽  
Beatriz Serrato Coelho ◽  
Flávia Sens Fagundes Tomazinho ◽  
Bruno Monguilhott Crozeta ◽  
...  
Keyword(s):  
Ex Vivo ◽  
Cone Beam ◽  
Computed Tomographic ◽  
Ex Vivo Study

scholarly journals Cone‐beam computed tomography accuracy in pulp chamber size evaluation: An ex vivo study

2019 ◽  
Vol 46 (1) ◽  
pp. 88-93
Author(s):  
Marcello Maddalone ◽  
Claudio Citterio ◽  
Alberto Pellegatta ◽  
Massimo Gagliani ◽  
Lorena Karanxha ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Ex Vivo ◽  
Cone Beam ◽  
Pulp Chamber ◽  
Size Evaluation ◽  
Ex Vivo Study ◽  
Chamber Size
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