CBCT evaluation of the tridimensional relationship between impacted lower third molar and the inferior alveolar nerve position

Borgonovo, Andrea Enrico; Rigaldo, F.; Maiorana, Carlo; Grossi, Giovanni Battista; Augusti, Davide; Re, Dino

doi:10.23736/s0026-4970.17.03976-0

Cited by 3 publications

(3 citation statements)

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“…CBCT involves maxillofacial imaging that uses the most advanced technology; it can display three-dimensional images from a cross-sectional view to evaluate the incidence or nonexistence of corticalization between the ITM and MC ( Nasser et al, 2018 ). Deep learning can also identify and categorize ITM with the use of CBCT ( Borgonovo et al, 2017 , Liu et al, 2022 , Orhan et al, 2021 ). On the other hand, CBCT is expensive and requires larger doses of radiation, thus, panoramic radiography remains a widely used an alternative in the examination of impacted teeth ( Whaites and Drage, 2014 ), in addition as a preliminary step to determining whether CBCT imaging is necessary.…”

Section: Discussionmentioning

confidence: 99%

The diagnostic performance of impacted third molars in the mandible: A review of deep learning on panoramic radiographs

Faadiya,

Widyaningrum,

Arindra

et al. 2024

The Saudi Dental Journal

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Section: Discussionmentioning

confidence: 99%

The diagnostic performance of impacted third molars in the mandible: A review of deep learning on panoramic radiographs

Faadiya,

Widyaningrum,

Arindra

et al. 2024

The Saudi Dental Journal

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“…For surgical repair, the bone in the external oblique ridge area is thicker and preferred for placing the rst xation plate due to its tensile strength. The lower border of the mandible, being a compressive stress trajectory area, is another critical site for placing the second xation plate [11,12]. While placing and securing both plates is straightforward with a submandibular approach, the transbuccal minimally, invasive approach poses signi cant challenges for placing the plate near the lower border of the mandible.…”

Section: Discussionmentioning

confidence: 99%

Characteristics of the Mandibular Canal in the Mandibular Angle Area and Its Significance in Minimally Invasive Treatment of Mandibular Angle Fractures

Li,

Acharya,

Shi

et al. 2024

Preprint

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Objective To explore the clinical significance of the characteristics of the mandibular canal in the mandibular angle area by measuring its position, with a focus on minimally invasive treatment of mandibular angle fractures. Methods Sixty individuals in good health, who received cone-beam computed tomography (CBCT) scans at the Stomatological Hospital of Xi'an Jiaotong University, were chosen for evaluation. Measurements were taken of the distances between the mandibular canal and the external oblique ridge, mandibular angle, and cortical bone on the buccal side. Statistical analysis was conducted to explore the positioning trends of the mandibular canal and to discern any gender-based disparities. Results The average distance from the mandibular canal to the external oblique ridge in the mandibular angle region was 14.41 ± 2.41 mm, and the average distance from the mandibular canal to the buccal cortical thickness was 4.67 ± 1.20 mm. A notable statistical contrast was observed in the distance from the mandibular canal to the mandibular angle between males and females (P < 0.05). Conversely, there were no statistically significant differences between genders for the other measured parameters (P > 0.05). Conclusion The distance from the mandibular canal to the external oblique ridge remains consistent, showing no statistical variance between genders. For safer management of mandibular angle fractures through minimally invasive techniques, it's recommended to maintain a minimum distance of 17 mm between internal fixation screws and the external oblique line to prevent injury to the inferior alveolar nerve. Moreover, the proximity of the canal to the buccal cortical bone is relatively short, suggesting that conventional single-cortical screws may not adequately mitigate the risk of nerve injury.

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“…Preoperative radiographic assessment is necessary to determine the relative anatomic relationship of the inferior alveolar nerve canal with third molar roots. Although panoramic radiography can be supportive in identifying high risk patients, a three-dimensional (3D) visualization of the anatomical structures of interest is often needed [5].…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Relationship between Mandibular Third Molar and Mandibular Canal with Semiautomatic Segmentation: A Pilot Study on CBCT Datasets

et al. 2022

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Inferior alveolar nerve injury is the main complication in mandibular third molar surgery. In this context, cone-beam computed tomography (CBCT) has become of crucial importance in evaluating the relationship between mandibular third molar and inferior alveolar nerve. Due to the growing interest in preoperative planning in oral surgery, several post-processing techniques have been implemented to obtain three-dimensional reconstructions of a volume of interest. In the present study, segmentation techniques were retrospectively applied to CBCT images in order to evaluate whether post-processing could offer better visualization of the structures of interest. Forty CBCT examinations performed for inferior third molar impaction were analyzed. Segmentation and volumetric reconstructions were performed. A dataset composed of multiplanar reconstructions for each study case, including segmented images, was submitted for evaluation to two oral surgeons, two general practitioners and four residents in oral surgery. The visualization of root morphology, canal course, and the relationship with mandibular cortical bone on both native CBCT and segmented images were assessed. Inter-rater agreement showed values of intraclass correlation coefficient (ICC) above 0.8 for all the examined parameters. Oral surgeons presented higher ICC values (p < 0.05). Segmented images can improve preoperative evaluation of the third molar and its relationship with the surrounding anatomical structures compared to native CBCT images. Further evaluation is needed to validate these preliminary results.

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CBCT evaluation of the tridimensional relationship between impacted lower third molar and the inferior alveolar nerve position

Cited by 3 publications

References 0 publications

The diagnostic performance of impacted third molars in the mandible: A review of deep learning on panoramic radiographs

The diagnostic performance of impacted third molars in the mandible: A review of deep learning on panoramic radiographs

Characteristics of the Mandibular Canal in the Mandibular Angle Area and Its Significance in Minimally Invasive Treatment of Mandibular Angle Fractures

Evaluating the Relationship between Mandibular Third Molar and Mandibular Canal with Semiautomatic Segmentation: A Pilot Study on CBCT Datasets

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