Influence of Voxel Size and Filter Application in Detecting Second Mesiobuccal Canals in Cone-beam Computed Tomographic Images

Mouzinho-Machado, Sâmia; Rosado, Lucas de Paula Lopes; Coelho-Silva, Fernanda; Neves, Frederico Sampaio; Haiter-Neto, Francisco; de-Azevedo-Vaz, Sérgio Lins

doi:10.1016/j.joen.2021.06.011

Cited by 16 publications

(13 citation statements)

References 33 publications

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“…For the purposes of the study, we performed an evaluation of CBCT images, taken with specific settings that allowed an adequate visualization of the root canal anatomy. The confirmation of the appropriateness of the settings and of the methods used derived from the recently published paper by Mouzinho–Machado et al [ 18 ]. In their research, the authors compared three different voxel sizes (0.08, 0.125, and 0.200 mm) in the scans of 40 maxillary first molars, 20 without MB2 and 20 with MB2.…”

Section: Discussionmentioning

confidence: 94%

The Correlation between Intraorifice Distance and the Anatomical Characteristics of the Second Mesiobuccal Canal of Maxillary Molars: A CBCT Study

Perondi,

Taschieri,

Baruffaldi

et al. 2024

International Journal of Dentistry

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Introduction. Missing anatomy is one of the main causes of endodontic failures, and accurate knowledge of teeth anatomy is a prerequisite for adequate root canal treatment. The aim of the present cone beam computed tomography (CBCT) study was to describe the anatomical characteristics of the mesiobuccal (MB) root canals of maxillary molars and to understand if a correlation exists between the position of the canal orifices and the anatomical features of the root. Methods. For the purposes of the study, a total of 100 CBCT scans of maxillary molars with two MB canals were selected and studied. The features of root canal anatomy of the MB root of the same teeth were analyzed and recorded (root length, confluence, and Vertucci classification). The distance between MB1 and MB2 orifices and the palatal orifice were recorded, as well as the distance between the orifices and the line joining the palatal orifice and the others. A statistical analysis was performed by providing descriptive measures, the measure of the correlation between different parameters, and the influence of some of these measures on the presence of a confluence between MB1 and MB2. Results. It resulted that the most frequent configuration is type II Vertucci. The length measured on the sagittal plane was significantly correlated to the presence of a confluence in the MB root. When the root length was higher than 14.56 mm, the confluence is three times more frequent than when the length is lower (OR = 3.635). The area under the curve (AUC) of the receiver operator characteristic (ROC) curve for length on the sagittal plane was 0.632 (P=0.036). Conclusions. The presence of a confluence between the MB canals of maxillary molars is correlated to the length of the root that could be measured on the sagittal plane and to the distance between the canal orifices. The relative position of the root canal orifices in relation to anatomic landmarks needs to be further explored.

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Section: Discussionmentioning

confidence: 94%

The Correlation between Intraorifice Distance and the Anatomical Characteristics of the Second Mesiobuccal Canal of Maxillary Molars: A CBCT Study

Perondi,

Taschieri,

Baruffaldi

et al. 2024

International Journal of Dentistry

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“…The effect of this parameter varies according to the study objectives whether related to the root or canal anatomy (or usually both), complexity of the configuration type and geometrics features (size and shape) of the root canals. Recent reports highlighted that a voxel size of 0.2 mm 3 and below is an appropriate resolution for assessing root canal anatomy in CBCT prevalence studies (Martins et al, 2019a(Martins et al, , 2020 which, up to now, could be a reasonable baseline for identification of root canal anatomy and appropriate comparisons between different anatomy studies; however, based on current advancements in CBCT imaging and the evolving evidence for the more accuracy of smaller voxel sizes (≤0.125 mm 3 ) compared to 0.2 mm 3 (Mouzinho- Machado et al, 2021), it seems that the optimal voxel size for future anatomy studies could be of a smaller value. FOV is another important parameter which influences the visualisation of the root canal system (Hassan et al, 2012).…”

Section: Cone Beam Computed Tomography (Cbct)mentioning

confidence: 99%

A critical analysis of laboratory and clinical research methods to study root and canal anatomy

Ahmed

2022

Int Endodontic J

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The technical execution of root canal treatment procedures demands a thorough understanding and knowledge of root and canal anatomy. Over the decades, and with the aid of various research methods such as staining and clearing, 2D radiographic imaging, sectioning procedures, cone beam computed tomography and micro‐computed tomography, many laboratory and clinical studies have been undertaken to understand the root and canal anatomy of the human dentition. This has resulted in a tremendous increase in the body of knowledge with a wide range of qualitative and quantitative presentations of the root and canal anatomy. This review aims to provide a critical analysis for the laboratory and clinical research methods in root and canal anatomy studies. In addition, it aims to identify existing gaps and present insights for directions of future research and ways for translation to clinical endodontics.

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“…Generally speaking, a small voxel size in a CBCT protocol is often associated with better image quality and higher diagnostic accuracy [ 22 , 23 ], but requires more exposure time and consequently may increase the radiation exposure to the patient [ 24 ]. Previous scholars have evaluated the impact of voxel size on different diagnostic tasks, such as detection of root fractures, carious lesions, root resorption, periodontal defects, erosions in the temporomandibular joint, root canal variations, etc., and the results varied depending on the task and the CBCT systems used [ 21 , 25 – 28 ]. In regard to the diagnosis of root canal anatomy, Bauman et al [ 22 ] and Mouzinho-Machado et al [ 25 ] reported that a smaller voxel size increased the diagnostic accuracy of MB2 canals.…”

Section: Introductionmentioning

confidence: 99%

“…Previous scholars have evaluated the impact of voxel size on different diagnostic tasks, such as detection of root fractures, carious lesions, root resorption, periodontal defects, erosions in the temporomandibular joint, root canal variations, etc., and the results varied depending on the task and the CBCT systems used [ 21 , 25 – 28 ]. In regard to the diagnosis of root canal anatomy, Bauman et al [ 22 ] and Mouzinho-Machado et al [ 25 ] reported that a smaller voxel size increased the diagnostic accuracy of MB2 canals. While Vizzotto et al [ 23 ] reported that filling of the first mesio-buccal canal (MB1) reduced the second mesio-buccal canal (MB2) detection in the CBCT images of 300 and 250 μm voxel size, but not of 200 μm voxel size; for teeth with MB1 filling, the 200 μm voxel size was the most appropriate, whereas for those with no MB1 filling or after MB1 root canal filling removal, the 300 μm voxel size was adequate to achieve good diagnostic performance and lower radiation exposure.…”

Section: Introductionmentioning

confidence: 99%

Ex vivo detection of mandibular incisors’ root canal morphology using cone-beam computed tomography with 4 different voxel sizes and micro-computed tomography

Bai,

Tang,

et al. 2023

BMC Oral Health

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Background In recent years, cone-beam computed tomography (CBCT) has been widely used to evaluate patients’ root canal anatomy due to its high resolution and noninvasive nature. As voxel size is one of the most important parameters affecting CBCT image quality, the current study evaluated the diagnostic potential of CBCT with 4 different voxel sizes in the detection of double root canal systems and accessory canals (ACs) in permanent mandibular incisors. Methods A total of 106 extracted mandibular permanent incisors were collected from the dental clinics, and then were scanned by using micro-CT with a voxel size of 9 μm. The teeth were then fixed in the tooth sockets of human dry mandibles and scanned by using a CBCT device with 4 different voxel sizes (300, 200, 250, and 125 μm). Four observers detected in blind the root canal morphology of the teeth according to the CBCT images, and the presence or absence of a double root canal system, and the presence or absence of ACs, were scored according to a 5-point scale, respectively. Receiver operating characteristic (ROC) analysis was performed, and DeLong test was used to compare the area under the curve (AUC) values and the micro-CT data was taken as a gold standard. Results Among 106 sample teeth, 25 specimens with a double root canal system were identified by the micro-CT. ROC curve analysis of the data obtained by the four observers showed that in the detection of double root canal systems, the AUC values ranged from 0.765 to 0.889 for 300 μm voxel size, from 0.877 to 0.926 for 250 μm voxel size, from 0.893 to 0.967 for 200 μm voxel size, and from 0.914 to 0.967 for 125 μm voxel size (all p < 0.01). In general, we observed a trend that the AUC values, sensitivity, and specialty increased with the decrease in the voxel size, and significantly higher AUC values were detected in 125 μm voxel size images. In the detection of ACs, ROC curve analysis showed that among the four observers, the AUC values ranged from 0.554 to 0.639 for 300 μm voxel size, from 0.532 to 0.654 for 250 μm voxel size, from 0.567 to 0.626 for 200 μm voxel size, and from 0.638 to 0.678 for 125 μm voxel size. CBCT images at a voxel size of 125 μm had a weak diagnostic potential (AUC: 0.5–0.7, all p < 0.05) in the detection of AC, with a lower sensitivity ranging from 36.8 to 57.9% and a higher specialty ranging from 73.6 to 98.8%. Conclusions CBCT with 300 μm voxel size could only provide moderate diagnostic accuracy in the detection of a double canal system in mandibular incisors. CBCT with a voxel size of 125 μm exhibited high diagnostic value in the detection of double canal systems, while showing low but statistically significant value in the detection of ACs.

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Influence of Voxel Size and Filter Application in Detecting Second Mesiobuccal Canals in Cone-beam Computed Tomographic Images

Cited by 16 publications

References 33 publications

The Correlation between Intraorifice Distance and the Anatomical Characteristics of the Second Mesiobuccal Canal of Maxillary Molars: A CBCT Study

The Correlation between Intraorifice Distance and the Anatomical Characteristics of the Second Mesiobuccal Canal of Maxillary Molars: A CBCT Study

A critical analysis of laboratory and clinical research methods to study root and canal anatomy

Ex vivo detection of mandibular incisors’ root canal morphology using cone-beam computed tomography with 4 different voxel sizes and micro-computed tomography

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