scholarly journals Validation of a windowing protocol for accurate in vivo tooth segmentation using i-CAT cone beam computed tomography

2018 ◽  
Vol 27 (7) ◽  
pp. 1001-1008 ◽  
Author(s):  
Babak Rastegar ◽  
Guillaume Odri ◽  
Raphael Olszewski
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Tooth Segmentation

scholarly journals Prevalence of non-single canals in mandibular premolars and correlations with other anatomical variants: an in vivo cone beam computed tomography study

2019 ◽  
Author(s):  
Young-Eun Jang ◽  
Yemi Kim ◽  
Bom Sahn Kim ◽  
Sin-Young Kim ◽  
Hyung-Jong Kim
Keyword(s):  
Computed Tomography ◽  
Regression Analysis ◽  
Cone Beam Computed Tomography ◽  
Root Canal ◽  
Odds Ratio ◽  
Cone Beam ◽  
Anatomical Variants ◽  
Morphologic Characteristics ◽  
Type V

Abstract Background A knowledge regarding anatomical variants is important to achieve success in endodontic treatment. Root canal treatment of mandibular first premolars (PM1s) is challenging due to the existence of numerous variations in canal configurations, including a C-shaped variant. We aim to determine the prevalence and morphologic characteristics of non-single canals of mandibular first (PM1s) and second (PM2s) premolars in a Korean population using cone beam computed tomography (CBCT) and to evaluate correlations between non-single canals of PM1s and other anatomical variants, such as distolingual roots (DLRs) in mandibular first molars (M1s) and C-shaped canals in mandibular second molars (M2s). Methods A total of 971 PM1s and 997 PM2s from 500 patients were examined in vivo by CBCT. Root canal configurations and C-shaped canals were determined in accordance with the Vertucci classification and Fan classification, respectively. The correlation between non-single canals in PM1s and DLRs in M1s was evaluated using logistic regression analysis. Results PM2s typically had one root (99.89%) with one canal (98.4%). Among PM1s with non-single canals (21.2%), Vertucci type V (10.9%) and C-shaped (3.7%) canals were prevalent. Among C-shaped PM1 canals, the majority were Vertucci type V (77.8%); a C-shaped configuration (C2) was predominant mostly at the middle and/or apical third of the root. After adjusting for other variables (i.e., sex, age, and side), C-shaped canals in PM1s was significantly correlated with the presence of DLRs in M1s (odds ratio = 2.616; 95% confidence interval, 1.257–5.443; p = 0.010). Conclusions The presence of C-shaped PM1 canals was positively related to the presence of DLRs in M1s. Although C-shaped canals in PM1s are difficult to distinguish, this finding could aid clinicians in predicting C-shaped canal configurations in PM1s of patients who exhibit DLRs in M1s.

Accuracy of High-resolution Small-volume Cone-Beam Computed Tomography in the Diagnosis of Vertical Root Fracture: An In Vivo Analysis

2020 ◽  
Vol 46 (8) ◽  
pp. 1059-1066 ◽  
Author(s):  
Debora R. Dias ◽  
Lilian C.V. Iwaki ◽  
Alexandre C.A. de Oliveira ◽  
Felipe S. Martinhão ◽  
Robson M. Rossi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Cone Beam Computed Tomography ◽  
Small Volume ◽  
Cone Beam ◽  
Root Fracture ◽  
Vertical Root Fracture ◽  
In Vivo Analysis

scholarly journals The Validity of In Vivo Tooth Volume Determinations From Cone-Beam Computed Tomography

2010 ◽  
Vol 80 (1) ◽  
pp. 160-166 ◽  
Author(s):  
Yi Liu ◽  
Raphael Olszewski ◽  
Emanuel Stefan Alexandroni ◽  
Reyes Enciso ◽  
Tianmin Xu ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Interobserver Reliability ◽  
Pearson Correlation ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Volumetric Analysis ◽  
Cone Beam ◽  
Water Displacement

Abstract Objective: To determine the accuracy of volumetric analysis of teeth in vivo using cone-beam computed tomography (CBCT). Materials and Methods: The physical volume (Vw) of 24 bicuspids extracted for orthodontic purposes (16 were imaged with the I-CAT and 8 with the CB MercuRay) were determined using the water displacement technique. Corresponding pretreatment CBCT image data were uploaded into Amira 4.0 for segmentation and radiographic volume (Va). All measurements were performed twice by two observers. The statistical difference between Vw and Va was assessed using a paired t-test. The intraobserver and interobserver reliability were determined by calculating Pearson correlation coefficients and intraclass correlation coefficients. Results: The overall mean Vw of teeth specimens was 0.553 ± 0.082 cm3, while the overall mean Va was 0.548 ± 0.079 cm3 (0.529 ± 0.078 cm3 for observer 1 and 0.567 ± 0.085 cm3 for observer 2). There were statistically significant differences between Va and Vw (P < .05). Between observer 1 and observer 2, Va measurements were statistically significantly different (P < .05). The interobserver and intraobserver correlation coefficient for Vw was high. Lastly, surface smoothing reduced the volume by 3% to 12%. Conclusions: In vivo determination of tooth volumes from CBCT data is feasible. The measurements slightly deviate from the physical volumes within −4% to 7%. Smoothing operations reduce volume measurements. Currently, no requirements for accuracy of volumetric determinations of tooth volume have been established.

Cone beam computed tomography (CBCT) characterization for in-vivo cancellous bone structural measurements

2016 ◽  
Vol 32 ◽  
pp. 81-82
Author(s):  
M. Maddalo ◽  
F. Baruffaldi ◽  
C. Fersini ◽  
C. Pinardi ◽  
F. Dusi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cancellous Bone ◽  
Cone Beam Computed Tomography ◽  
Cone Beam

Mathematical estimation and in vivo dose measurement for cone-beam computed tomography on prostate cancer patients

2009 ◽  
Vol 92 (1) ◽  
pp. 57-61 ◽  
Author(s):  
Shiu-Chen Jeng ◽  
Chiao-Ling Tsai ◽  
Wen-Tung Chan ◽  
Chuan-Jong Tung ◽  
Jian-Kuen Wu ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Computed Tomography ◽  
Cancer Patients ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Dose Measurement

scholarly journals Frequency of non-single canals in mandibular premolars and correlations with other anatomical variants: an in vivo cone beam computed tomography study

2019 ◽  
Author(s):  
Young-Eun Jang ◽  
Yemi Kim ◽  
Bom Sahn Kim ◽  
Sin-Young Kim ◽  
Hyung-Jong Kim
Keyword(s):  
Computed Tomography ◽  
Regression Analysis ◽  
Cone Beam Computed Tomography ◽  
Root Canal ◽  
Odds Ratio ◽  
Cone Beam ◽  
Anatomical Variants ◽  
Morphologic Characteristics ◽  
Type V

Abstract Background: A knowledge regarding anatomical variants is important to achieve success in endodontic treatment. Root canal treatment of mandibular first premolars (PM1s) is challenging due to the existence of numerous variations in canal configurations, including a C-shaped variant. We aim to determine the frequency and morphologic characteristics of non-single canals of mandibular first (PM1s) and second (PM2s) premolars in a Korean population using cone beam computed tomography (CBCT) and to evaluate correlations between non-single canals of PM1s and other anatomical variants, such as distolingual roots (DLRs) in mandibular first molars (M1s) and C-shaped canals in mandibular second molars (M2s). Methods: A total of 971 PM1s and 997 PM2s from 500 patients were examined in vivo by CBCT. Root canal configurations and C-shaped canals were determined in accordance with the Vertucci classification and Fan classification, respectively. The correlation between non-single canals in PM1s and DLRs in M1s was evaluated using logistic regression analysis. Results: PM2s typically had one root (99.89%) with one canal (98.4%). Among PM1s with non-single canals (21.2%), Vertucci type V (10.9%) and C-shaped (3.7%) canals were prevalent. Among C-shaped PM1 canals, the majority were Vertucci type V (77.8%); a C-shaped configuration (C2) was predominant mostly at the middle and/or apical third of the root. After adjusting for other variables (i.e., sex, age, and side), C-shaped canals in PM1s was significantly correlated with the presence of DLRs in M1s (odds ratio = 2.616; 95% confidence interval, 1.257–5.443; p = 0.010). Conclusions: The presence of C-shaped PM1 canals was positively related to the presence of DLRs in M1s. Although C-shaped canals in PM1s are difficult to distinguish, this finding could aid clinicians in predicting C-shaped canal configurations in PM1s of patients who exhibit DLRs in M1s.

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