Case Study: Limitations of Panoramic Radiography in the Anterior Mandible

Walker, Cameron; Thomson, Donald; McKenna, Gerald

doi:10.12968/denu.2009.36.10.620

Cited by 10 publications

(3 citation statements)

References 7 publications

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“…In our case, the multiple mental foramina on the left side were not visualized in the panoramic radiograph. Since the mental foramen opening may be slanted, it may not be clearly visualized due to the superimposition of normal bony trabeculations or distortion of structures due to technique errors [ 16 ]. CBCT imaging was able to provide the accurate location of all the foramina and is essential to the optimal planning of implant placement in this region.…”

Section: Discussionmentioning

confidence: 99%

Trifurcated Mental Foramina: A Cone-Beam Computed Tomography Incidental Finding During the Implant Treatment Planning

Vyas¹,

Gohel²

2023

Cureus

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The mental foramen is a known skull anatomical structure located bilaterally on the mandible along the buccal cortical plate. It is located approximately between the roots of premolars in the anteroposterior dimension, and its supero-inferior level on the alveolar height varies in every individual. The position of the mental foramen is very crucial when surgical interventions are planned in the area. An accessory mental foramina can be very well detected in the three-dimensional (3D) imaging modality, especially in 3D volume rendering images. It can still be appreciated in two-dimensional (2D) imaging modalities such as a panoramic; however, at times it can be confused with periapical pathology, especially in cases where caries are present in the teeth. Three-dimensional imaging modality plays a critical role in identifying such anatomical variation, and hence, it is important to evaluate any surgical site in three dimensions prior to surgical intervention.

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Section: Discussionmentioning

confidence: 99%

Trifurcated Mental Foramina: A Cone-Beam Computed Tomography Incidental Finding During the Implant Treatment Planning

Vyas¹,

Gohel²

2023

Cureus

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“…Possible causes of artifacts include superimposition of intervertebral spaces, depression in the mental region of the mandible, superimposition of radio-opaque structures, reduced image detail compared with intraoral views, and uneven magnification. For these reasons, Dental Panoramic Tomography could be inappropriate for imaging impacted mandibular canines [ 37 ].…”

Section: Discussionmentioning

confidence: 99%

Impacted Permanent Mandibular Canines: Epidemiological Evaluation

Agastra,

Saettone,

Parrini

et al. 2023

JCM

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Background: The aim of this study was to evaluate the epidemiology of impacted and transmigrated mandibular canines in a large orthodontic population referred to the University of Turin. Methods: Panoramic radiographs, intraoral photographs, and dental casts of 2119 patients referred to the Department of Orthodontics at the University of Turin, Italy, between 1995 and 2022 were reviewed. These patients were divided into two groups. Group A included 1479 patients found in the Dental School archive before 2017, more specifically between 1995 and 2017. These patients were examined in order to calculate the prevalence of impacted and transmigrated mandibular canines. From 2017 to 2022, the records of 640 new patients were examined (GROUP B) in order to calculate the incidence of these occurrences. Results: The prevalence of mandibular canine impaction in Group A was found to be 1.7%, with a total of 25 patients having mandibular canine impaction. A prevalence of 0.3% was found for mandibular canine transmigration (Group A). The incidence of mandibular canine impaction was found to be 2%, with a total of 13 patients with mandibular canine impaction (Group B). Mandibular canine transmigration was found in 1 of 640 participants (Group B). Conclusions: Twenty-five of 1479 patients had impacted mandibular canines, resulting in a prevalence value of 1.7%. The incidence was found to be 2%, with 13 of 640 patients having impacted mandibular canines. These results show higher prevalence and incidence rates of mandibular canine impaction when compared with previously published data.

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“…One study found a sensitivity of 0.28 and 0.58 for OPG and PR, respectively, considering CBCT as the reference tool [30]. Also, despite technical improvements, front teeth in particular are difficult to assess in OPG, due to superimposition of anatomical structures like the cervical spine and the mental fossa area [31]. Within these limitations, OPG is still a good method in detecting AL [32]: It delivers data of the whole dentition of a patient, whereby PR and CBCT are just focusing a particular region of interest, and only a small group of patients obtain PR of all teeth, e.g., for periodontal treatment planning and we would generate an indication bias.…”

Section: Limitations and Generalizabilitymentioning

confidence: 99%

Machine Learning to Predict Apical Lesions: A Cross-Sectional and Model Development Study

Herbst,

Pitchika,

Krois

et al. 2023

JCM

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(1) Background: We aimed to identify factors associated with the presence of apical lesions (AL) in panoramic radiographs and to evaluate the predictive value of the identified factors. (2) Methodology: Panoramic radiographs from 1071 patients (age: 11–93 a, mean: 50.6 a ± 19.7 a) with 27,532 teeth were included. Each radiograph was independently assessed by five experienced dentists for AL. A range of shallow machine learning algorithms (logistic regression, k-nearest neighbor, decision tree, random forest, support vector machine, adaptive and gradient boosting) were employed to identify factors at both the patient and tooth level associated with AL and to predict AL. (3) Results: AL were detected in 522 patients (48.7%) and 1133 teeth (4.1%), whereas males showed a significantly higher prevalence than females (52.5%/44.8%; p < 0.05). Logistic regression found that an existing root canal treatment was the most important risk factor (adjusted Odds Ratio 16.89; 95% CI: 13.98–20.41), followed by the tooth type ‘molar’ (2.54; 2.1–3.08) and the restoration with a crown (2.1; 1.67–2.63). Associations between factors and AL were stronger and accuracy higher when using fewer complex models like decision tree (F1 score: 0.9 (0.89–0.9)). (4) Conclusions: The presence of AL was higher in root-canal treated teeth, those with crowns and molars. More complex machine learning models did not outperform less-complex ones.

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Case Study: Limitations of Panoramic Radiography in the Anterior Mandible

Abstract: Panoramic radiography is often unsuitable for radiographic examination of the anterior mandible.

Cited by 10 publications

References 7 publications

Trifurcated Mental Foramina: A Cone-Beam Computed Tomography Incidental Finding During the Implant Treatment Planning

Trifurcated Mental Foramina: A Cone-Beam Computed Tomography Incidental Finding During the Implant Treatment Planning

Impacted Permanent Mandibular Canines: Epidemiological Evaluation

Machine Learning to Predict Apical Lesions: A Cross-Sectional and Model Development Study

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