Mandibular canal branching assessed with cone beam computed tomography

Castro, Maurício Augusto Aquino de; Barra, Sâmila Gonçalves; Vich, Manuel Oscar Lagravère; Abreu, Mauro Henrique Nogueira Guimarães de; Mesquita, Ricardo Alves

doi:10.1007/s11547-018-0886-3

Cited by 15 publications

(22 citation statements)

References 28 publications

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Section: Diagnosismentioning

confidence: 99%

“…CT and CBCT have been used to overcome the limitations of panoramic radiography (Fukami et al, ). So far, four studies have used both panoramic and CBCT (López‐Videla et al, ; Moro et al, ; Muinelo‐Lorenzo et al, ; Neves et al, ), two have used a combination of CT and CBCT (Rouas, Delbos, & Nancy, ; Shen et al, ), 21 have used only CBCT, one of them determining the prevalence of BMC in children (Afsa & Rahmati, ; Borgonovo et al, ; de Castro et al, ; de Oliveira‐Santos et al, ; Kang et al, ; Kuribayashi et al, ; Li et al, ; Luangchana et al, ; Naitoh et al, ; Neves et al, ; Ogawa et al, ; Okumu & Dumlu, ; Orhan et al, ; Orhan et al, ; Rashsuren et al, ; Shah et al, ; Sonneveld et al, ; Villa et al, ; Yang et al, ; Yi et al, ; Yoon et al, ; Zhang et al, ), and two have used only CT (Fu et al, ; Lins et al, ). These CT and CBCT studies reported a higher prevalence of BMC, in the range 0.05 to 69.0% (Table ).…”

Section: Bifid Mandibular Canalmentioning

confidence: 99%

“…As a recurrent tumor in the vicinity of the mandibular canal has been misdiagnosed, this knowledge will also encourage extra care when dealing with clinical uncertainty (Guimaraes, Pontes, Mata Rezende Ddos, & Pontes, ). Added to this problem is the recent finding that tomographic images of pathologies and BMCs often coexist in the molar region (de Castro et al, ). The simultaneous occurrence of multiple pathologies and a BMC is an important finding as it suggests that pathologies can stimulate the delivery of endogenous factors that trigger the growth of neurovascular tissues.…”

Section: The Clinical Significance Of Accessory Mandibular Canalsmentioning

confidence: 99%

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The clinical anatomy of accessory mandibular canal in dentistry

Ngeow

Chai

2020

Clinical Anatomy

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The mandibular canal is a conduit that allows the inferior alveolar neurovascular bundle to transverse the mandible to supply the dentition, jawbone and soft tissue around the gingiva and the lower lip. It is not a single canal but an anatomical structure with multiple branches and variations. The branches are termed accessory, bifid or trifid canals depending on their number and configuration. A bifid mandibular canal is an anatomical variation reported more commonly than the trifid variant. Because of these variations, it is of the utmost importance to determine the exact location of the mandibular canal and to identify any branches arising from it prior to performing surgery in the mandible. This article reviews the prevalence, classification and morphometric measurements of these accessory mandibular canals, emphasizing their clinical significance.

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Section: Diagnosismentioning

confidence: 99%

Section: Bifid Mandibular Canalmentioning

confidence: 99%

Section: The Clinical Significance Of Accessory Mandibular Canalsmentioning

confidence: 99%

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The clinical anatomy of accessory mandibular canal in dentistry

Ngeow

Chai

2020

Clinical Anatomy

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“…De Castro et al assessed mandibular canal branching (MCB) with CBCT and concluded that the prevalence of MCB was 41.1%, among which 61.5% presented one branch; nevertheless, 38.5% presented more than one MCB. There was no statistically significant difference in gender regarding the presence of MCB or the pattern of presence (i.e., single branch or multiple branches) (11). Okumus et al demonstrated BMCs in 200 (40%) of the 500 subjects and in 248 of the 1000 sides (24.8%) (12).…”

Section: Discussionmentioning

confidence: 94%

Anatomical Variations of the Mandibular Canal and Mental Foramen in Full Edentulous Iranian Subpopulation: A Cone-Beam Computed Tomographic Study

et al. 2022

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Background: This study sought to determine the anatomical variations of the mental foramen (MF) and the mandibular canal (MC) in the full edentulous Iranian subpopulation using cone-beam computed tomography (CBCT). These variations can have significant clinical implications in dental implant surgery. Methods: This descriptive cross-sectional study evaluated the mandible CBCT scans of 384 completely edentulous patients that required dental implant treatment. The CBCT scans were retrieved from four radiology clinics in Tehran, Iran, using quota sampling. The reconstructed images were evaluated to determine the dimensions and position of the MC and its cortication at the site of the mandibular first molar, the branching of the MC, the existence of the anterior loop of the mental nerve, and anatomical variations of the MF. The correlations of variables with age and gender were analyzed using the independent t-test, chi-square test, and analysis of variance based on the type of the variable. Results: The cortication of the MC at the site of the mandibular first molar was present in 72.9% of the cases and was significantly more common in male patients (P = 0.0001). Bifid mandibular canal, accessory MF, and anterior loop of mental nerve were present in 9.9%, 65%, and 54.7% of the samples, respectively, and they had no significant correlation with age/gender. The mean MC diameter, the mean MF height, and the mean distance from the inferior border of the mandible to the center of MF were all significantly higher in male patients (P

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“…Second, since the IAN travels in various directions in 3D, it is difficult to intuitively determine the exact shape [ 16 ]. Thirdly, it is difficult to determine whether the shape or position of the nerve has been deformed due to adjacent teeth or lesions [ 17 ]. Finally, if the cortical layer of the mandibular canal surrounding the IAN is unclear from the image, it is difficult to determine the exact location [ 18 ].…”

Section: Discussionmentioning

confidence: 99%

Deep semi-supervised learning for automatic segmentation of inferior alveolar nerve using a convolutional neural network

et al. 2021

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Background The inferior alveolar nerve (IAN) innervates and regulates the sensation of the mandibular teeth and lower lip. The position of the IAN should be monitored prior to surgery. Therefore, a study using artificial intelligence (AI) was planned to image and track the position of the IAN automatically for a quicker and safer surgery. Methods A total of 138 cone-beam computed tomography datasets (Internal: 98, External: 40) collected from multiple centers (three hospitals) were used in the study. A customized 3D nnU-Net was used for image segmentation. Active learning, which consists of three steps, was carried out in iterations for 83 datasets with cumulative additions after each step. Subsequently, the accuracy of the model for IAN segmentation was evaluated using the 50 datasets. The accuracy by deriving the dice similarity coefficient (DSC) value and the segmentation time for each learning step were compared. In addition, visual scoring was considered to comparatively evaluate the manual and automatic segmentation. Results After learning, the DSC gradually increased to 0.48 ± 0.11 to 0.50 ± 0.11, and 0.58 ± 0.08. The DSC for the external dataset was 0.49 ± 0.12. The times required for segmentation were 124.8, 143.4, and 86.4 s, showing a large decrease at the final stage. In visual scoring, the accuracy of manual segmentation was found to be higher than that of automatic segmentation. Conclusions The deep active learning framework can serve as a fast, accurate, and robust clinical tool for demarcating IAN location.

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Mandibular canal branching assessed with cone beam computed tomography

Abstract: Mandibular canal branching presented a high prevalence in CBCT imagery, more frequently located in regions of the premolar and retromolar. An adequate diagnosis of the MCB is necessary to perform dental procedures and verify possible associated pathologies.

Cited by 15 publications

References 28 publications

The clinical anatomy of accessory mandibular canal in dentistry

The clinical anatomy of accessory mandibular canal in dentistry

Anatomical Variations of the Mandibular Canal and Mental Foramen in Full Edentulous Iranian Subpopulation: A Cone-Beam Computed Tomographic Study

Deep semi-supervised learning for automatic segmentation of inferior alveolar nerve using a convolutional neural network

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