Oral Surgery Oral Medicine Oral Pathology Oral Radiology最新文献

{"title":"Accuracy of orthopantomography in predicting position and proximity of superimposed or nearby third molar root relative to inferior alveolar canal","authors":"Prof. Gina Roque ,&nbsp;Prof. Dwight Rice ,&nbsp;Mr. Geonwoong Park ,&nbsp;Mrs. Min Jung Yoon ,&nbsp;Prof. Udochukwu Oyoyo","doi":"10.1016/j.oooo.2024.11.065","DOIUrl":"10.1016/j.oooo.2024.11.065","url":null,"abstract":"<div><h3>Objectives</h3><div>Panoramic radiography is still most widely used for third molar extractions evaluation. This study evaluated the correlations between panoramic radiographic signs and relationship between third-molar root and inferior alveolar (IA) canal using cone beam computed tomography (CBCT) as our gold standard.</div></div><div><h3>Study Design</h3><div>In total, 218 patients with 380 mandibular third molars were selected. Panoramic and CBCT variables were examined, along with demographics and third-molar root classification identification. Nine PANO variables (radiolucency around the roots, radiolucency on the roots, deviation of roots, narrowing of roots, narrowing of IA canal, deviation of IA canal, interruption of superior white line border of IA canal, contact between Root and IA canal, superimposition of root and IA canal) and 4 CBCT variables (location of IA canal, contact between root and IA canal, distance between root and IA canal [mm], and interruption of buccal and/or lingual plate of mandible) were evaluated. Binomial logistic regression was performed.</div></div><div><h3>Results</h3><div>Five variables were statistically significant predictors of presence of contact between root and IA canal assessed in CBCT: superimposition of root and IA (<em>P</em> &lt; .001), narrowing of IA canal (<em>P</em> &lt; .003), interruption of superior white line of IA canal wall (<em>P</em> &lt; .016), narrowing of root (<em>P</em> &lt; .036), and radiolucency on root (<em>P</em> &lt; .049). Mesioangular impactions had a statistically significant correlation with the presence of contact between root and IA (<em>P</em> &lt; .010).</div></div><div><h3>Conclusions</h3><div>Five PANO variables were effective in predicting contact between IA canal and third molar roots on CBCT, with an overall accuracy of 87%.</div></div>","PeriodicalId":49010,"journal":{"name":"Oral Surgery Oral Medicine Oral Pathology Oral Radiology","volume":"139 3","pages":"Page e92"},"PeriodicalIF":2.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identification of the Incisive branch of the inferior alveolar nerve in edentulous mandibles using cone beam computed tomography (CBCT)","authors":"Dr. Ashley Madern ,&nbsp;Dr. H. Dexter Barber ,&nbsp;Dr. Gina Agostini-Walesch ,&nbsp;Dr. Trever Siu ,&nbsp;Mrs. Jamie Klinefelter ,&nbsp;Mr. Justin Martin","doi":"10.1016/j.oooo.2024.11.057","DOIUrl":"10.1016/j.oooo.2024.11.057","url":null,"abstract":"<div><h3>Objective</h3><div>Risk of iatrogenic paresthesia and postoperative complications increases in patients with edentulism. This study measures agreement of a standard, cone beam computed tomography (CBCT)-derived incisive branch (IB) measurement across independent observers and secondarily compares average IB characteristics in relation to patient demographics.</div></div><div><h3>Study Design</h3><div>A retrospective study of edentulous mandibles was performed using CBCT to assess IB anatomical variation. Three independent observers (2 dental students, 1 licensed oral and maxillofacial radiologist [OMR] independently measured IB length. Eighty-five bilateral measurements were pooled for agreement analysis using coefficients of interrater reliability (IRR). A paired, one-way analysis of variance tested for significant differences between observers. Additionally, the OMR recorded 236 observations for demographic analyses. These were subject to a one-way analysis of variance testing whether IB length varied by sex or port exit. A Pearson's correlation tested for a significant correlation with age. All statistics were performed using R (version 4.1.2) packages IRR, survival, and PerformanceAnalysis.</div></div><div><h3>Results</h3><div>IRR results show strong, significant agreement across all observers (intraclass correlation coefficient = 0.944, 95% confidence interval 0.921-0.962, <em>P</em> &lt; .0001), indicating no systematic differences was detected. This was corroborated by high correlations between observers (R² = 0.95, <em>P</em> &lt; .0001) and non-significant analysis of variance results (<em>P</em> = .74, F = 0.303). Trained student observers were within 2 mm of OMR values 90% to 93% of the time. Descriptive results showed a mean IB length of 9.93 ± 4.11 (9.72 ± 4.05 for left, 10.17 ± 4.18 for right). A lingual port of exit was observed in 13.56% of cases. There was a significant effect of port on IB length (F = 10.21, <em>P</em> = .002), with lingual ports being shorter (7.82 ± 3.06 mm vs 10.27 ± 4.16 mm). A significant effect was reported for sex (F = 3.916, <em>P</em> = .05), with women having shorter IB lengths (8.98 ± 3.3 mm vs 10.38 ± 3.67 mm). There was no significant correlation with age (R² = −0.094).</div></div><div><h3>Conclusion</h3><div>The IB measurements had high agreement across observers with varying experience. Edentulous mandibles have a varied anatomic landscape and establishing a predictive IB dimension will aid practitioners in surgical planning.</div></div>","PeriodicalId":49010,"journal":{"name":"Oral Surgery Oral Medicine Oral Pathology Oral Radiology","volume":"139 3","pages":"Page e89"},"PeriodicalIF":2.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Subjective evaluation of photon counting sensor for interproximal caries detection","authors":"Dr. Santiago Cobos ,&nbsp;Dr. Aditya Tadinada","doi":"10.1016/j.oooo.2024.11.009","DOIUrl":"10.1016/j.oooo.2024.11.009","url":null,"abstract":"<div><h3>Objective</h3><div>Photon-counting sensors (PCS), as the name indicates, are a new kind of sensor that creates the image by counting photons. PCS are, in theory, less sensitive to image blur and might be more sensitive to early caries detection. The objective of this in vitro study is to present a subjective evaluation of bitewing radiographs captured with PCS when compared with traditional digital sensors like complementary metal oxide semiconductor (CMOS) sensors and photo-stimulable phosphor (PSP) plates.</div></div><div><h3>Study Design</h3><div>Extracted teeth with no carious lesions were mounted in a modular stage to replicate the configuration of (1) maxillary and (1) mandibular bitewing radiographs. The stage allowed repetitive installation of interchangeable holders for the 2 digital sensors and the PSP plate ensuring that the geometry of the radiographs was consistent for all technologies. Multiple bitewing radiographs were acquired at 70 kVp and 7 mA with varying exposure times (0.02, 0.08, 0.125, and 0.250 seconds). Two teeth were then drilled using a 0.5-mm diameter bur to simulate an incipient interproximal lesion, and images were recaptured with the previously mentioned exposure parameters. Six examiners—1 oral radiologist and 5 oral radiology residents—were asked to subjectively rate the diagnostic value and image quality metrics (i.e., spatial resolution, contrast resolution, dynamic range, and noise) of the bitewing radiographs.</div></div><div><h3>Results</h3><div>Image quality metrics like spatial resolution and noise characteristics of PCS ranked above the CMOS sensor and PSP plate, CMOS sensors were ranked as the technology with the best contrast resolution, and PSP plates had the best dynamic range. PCS were overall ranked as the preferred technology for defect detection and outperformed CMOS sensors and PSP plates when exposure parameters were not ideal.</div></div><div><h3>Conclusion</h3><div>PCS have the potential to provide clinical information with high diagnostic value. More research is needed to further evaluate the sensitivity and specificity of this technology.</div></div>","PeriodicalId":49010,"journal":{"name":"Oral Surgery Oral Medicine Oral Pathology Oral Radiology","volume":"139 3","pages":"Page e70"},"PeriodicalIF":2.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Use of virtual reality as a radiology teaching tool for dental students","authors":"Prof. Vinicius Dutra ,&nbsp;Dr. Sanjana Madarapu ,&nbsp;Prof. Luis Arriola Guillen ,&nbsp;Prof. Gabriela Liedke ,&nbsp;Prof. Phillip Wong ,&nbsp;Prof. Zebulun Wood","doi":"10.1016/j.oooo.2024.11.004","DOIUrl":"10.1016/j.oooo.2024.11.004","url":null,"abstract":"<div><h3>Objective</h3><div>To evaluate the effectiveness of a customized virtual reality (VR) application and its impact on radiographic image quality and the number of retakes by new learners.</div></div><div><h3>Study Design</h3><div>Thirty-nine first-year dental students were included in the research project. Students who had already taken dental radiology classes, had previous experience in taking intraoral radiographs, or had experience in the use of VR models were excluded. The students were randomized into 3 different groups: group A (Control, no VR use), group B (VR training and use), and group C (VR training and use + radiographic technique video). All groups attended regular lectures of the predoctoral course and a technique demonstration session. Subsequently, the students were required to complete a half full mouth series and were evaluated on the basis of the number of retakes and the graded radiographic image quality. The statistical analysis was conducted using IBM SPSS Statistics software for Windows, version 25.0 (IBM Corp.). Image quality and the number of retakes were compared among the 3 groups. Data normality was evaluated using the Shapiro-Wilk test, followed by the application of the Kruskal-Wallis and Wilcoxon rank-sum tests to compare the 3 groups.</div></div><div><h3>Results</h3><div>The use of VR had a significant effect on the number of retakes and the quality of the radiographs (<em>P</em> &lt; .05). The use of VR significantly improved students' grades (mean grades 7.77 vs 9.38 vs 8.31). The average number of retakes was 6.62 for group A, 3.38 for Group B, and 3.46 for Group C.</div></div><div><h3>Conclusion</h3><div>The use of VR as a teaching tool had an impact on the number of retakes and the quality of the radiographs by new learners. When using the VR application, students had fewer retakes and greater radiographic technique grades. The use of VR should be encouraged in dental education.</div></div>","PeriodicalId":49010,"journal":{"name":"Oral Surgery Oral Medicine Oral Pathology Oral Radiology","volume":"139 3","pages":"Page e68"},"PeriodicalIF":2.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A case study of an incidental finding and effects of an incomplete fracture union in the right angle of the mandible","authors":"Dr. Steven Dorris ,&nbsp;Dr. Sindhura Anamali ,&nbsp;Dr. J.P. Castro","doi":"10.1016/j.oooo.2024.11.029","DOIUrl":"10.1016/j.oooo.2024.11.029","url":null,"abstract":"<div><h3>Clinical Presentation</h3><div>A cone beam computed tomography dataset of an 8-year-old female patient was referred to the University of Iowa College of Dentistry Radiology service for identification of the location of multiple unerupted teeth, specifically the permanent canines and mandibular lateral incisors. Upon viewing the dataset, an oblique hypodense line involving the entire width of the mandible measuring approximately 20 mm extending through the angle of the right side of the mandible was noted. The referring doctor was not aware of this finding, and the patient was not symptomatic at the time. The hypodense line extended from the facial cortex just distal to the developing mandibular right second molar to the lingual cortex. There were multiple hypodense areas surrounding the fracture plane and portions of the surrounding bone had rolled cortical margins suggestive of fibrous healing at the site. Furthermore, the portions of the mandible that were posterior to this region were found to be underdeveloped. This is a valuable finding, as previous research on this subject has been inconclusive and primarily focused on fractures involving the condyle. The fracture in question was not identified in a previous pantomograph that was subsequently provided upon requisition.</div></div><div><h3>Differential Diagnosis</h3><div>Fibrous union right angle fracture of the mandible.</div></div><div><h3>Diagnosis and Management</h3><div>Follow-up to assess osseous healing was recommended in few weeks. The patient is currently asymptomatic. If there continues to be lack of osseous healing in the follow-up radiograph, surgical intervention will be necessary to avoid further complications.</div></div><div><h3>Conclusion</h3><div>Routine evaluations of CBCTs can unexpectedly reveal significant findings, such as this unique fracture in the mandible. Moreover, this particular case exemplifies the remarkable healing capacity of fibrous tissue in fractures, where minimal intervention was involved. Such fractures may lead to observable impacts on the growth and development of the mandibular ramus, condyle, and coronoid processes.</div></div>","PeriodicalId":49010,"journal":{"name":"Oral Surgery Oral Medicine Oral Pathology Oral Radiology","volume":"139 3","pages":"Page e78"},"PeriodicalIF":2.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of filtered back projection and iterative reconstructions on cone beam computed tomography (CBCT) image quality and processing time","authors":"Dr. Christiano de Oliveira Santos ,&nbsp;Ms. Amanda Ramage ,&nbsp;Dr. Kathleen Fischer ,&nbsp;Dr. Michael Sekula ,&nbsp;Dr. Gustavo Santaella ,&nbsp;Dr. William Scarfe","doi":"10.1016/j.oooo.2024.11.055","DOIUrl":"10.1016/j.oooo.2024.11.055","url":null,"abstract":"<div><h3>Objectives</h3><div>To assess the effect of standard filtered back projection (FBP) and iterative reconstruction (IR) methods on cone beam computed tomography (CBCT) image noise and processing time (PT), acquired with various acquisition parameters with and without metal artifact reduction (MAR).</div></div><div><h3>Methods</h3><div>CBCT scans using the Midmark EIOS unit of a human mandible embedded in soft tissue−equivalent material with and without the presence of an implant at mandibular first molar region were acquired at various acquisition settings (milliamperages [4 mA-14 mA], field of view [5 × 5, 6 × 8, 9 × 10 cm], and resolutions [low, standard, high]) and reconstructed using FBP and IR, and with and without MAR. The processing time was recorded for each reconstruction. ImageJ was used to analyze specific axial images. Radial transaxial fiducial lines were created relative to the implant site. Standard deviations of the gray density values (image noise) were calculated at fixed distances on the fiducial lines on the buccal and lingual aspects at specific axial levels, and mean values for FBP and IR were compared using paired <em>t</em> tests. Significance was defined as <em>P</em> &lt; .05.</div></div><div><h3>Results</h3><div>The overall mean for image noise (± SD) for FBP was 198.65 ± 55.58 and 99.84 ± 16.28 for IR. IR significantly decreased image noise compared to FBP at all acquisition parameters (<em>P</em> &lt; .001). Percentage noise reduction ranged between 41.9% (protocols at 5 mA) and 70.3% (FBP / 9 × 10 cm / low resolution / no MAR). IR increased processing time by an average of 35.1 seconds.</div></div><div><h3>Conclusions</h3><div>IR significantly reduces CBCT image noise compared to standard FBP without substantially increasing processing time.</div></div>","PeriodicalId":49010,"journal":{"name":"Oral Surgery Oral Medicine Oral Pathology Oral Radiology","volume":"139 3","pages":"Pages e88-e89"},"PeriodicalIF":2.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kikuchi-Fujimoto disease: the great masquerader: a rare case report","authors":"Dr. Pallak Arora ,&nbsp;Dr. Joshua Fountain ,&nbsp;Dr. Jake Gibbons ,&nbsp;Dr. Tyler Murray ,&nbsp;Dr. Hui Liang","doi":"10.1016/j.oooo.2024.11.015","DOIUrl":"10.1016/j.oooo.2024.11.015","url":null,"abstract":"<div><h3>Clinical Presentation</h3><div>Kikuchi disease (KD), also known as Kikuchi-Fujimoto disease or histiocytic necrotizing lymphadenitis, is a self-limiting cause of cervical lymphadenopathy. The prime cause may be infection, mostly being viral or autoimmune but the exact mechanism remains unclear. This case is challenging because of the misconception in view of the nonspecific clinical features leading to potential delay in diagnosis and irrelevant treatment costs.</div><div>A 49-year-old Asian woman reported fever, pain, and multiple swellings in the right side of her neck. Clinical findings of the case suggested further investigation through computed tomography evaluation. Multidetector computed tomography study with contrast revealed multiple pathologically enlarged lymph nodes in the right neck, with central low attenuation/necrosis, rim enhancement, and perinodal infiltration. Mild fat stranding and edema around the lymph nodes and in the fascial spaces of the right neck are present. Largest lymph nodes measured up to 14 mm in the right level 1B and level 2 regions.</div></div><div><h3>Differential Diagnosis</h3><div>Differential diagnosis included non-Hodgkin lymphoma, tuberculosis adenitis, systemic lupus erythematous, cat scratch disease, or toxoplasmosis.</div></div><div><h3>Diagnosis and Management</h3><div>Acid-fast bacilli and Grocott methenamine silver stains were negative for mycobacterial and fungal organisms respectively. Ultrasonography-guided right cervical lymph node biopsy revealed cylindrical cores of tissue predominantly consisting of necrosis with few viable lymphocytes. Focal histiocytes were present at the junction of necrosis. The features were consistent with necrotizing lymphadenitis/Kikuchi disease. The patient was managed supportively with nonsteroidal anti-inflammatory drugs and is currently being followed up.</div></div><div><h3>Conclusion</h3><div>This intriguing case of an uncommon cause of right tender lymphadenitis prompts investigation and recognition by physicians, radiologists, and pathologists for commonly misdiagnosing as lymphoma. Awareness of greater prevalence among East Asian populations and highlighting the self-limiting nature of Kikuchi disease may help for more accurate diagnosis and management of the disease.</div></div>","PeriodicalId":49010,"journal":{"name":"Oral Surgery Oral Medicine Oral Pathology Oral Radiology","volume":"139 3","pages":"Pages e72-e73"},"PeriodicalIF":2.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A unique case of calcifications of torus tubarius in cone beam computed tomography (CBCT)","authors":"Dr. Suvendra Vijayan ,&nbsp;Mr. Aarav Suarpaneni ,&nbsp;Dr. Shobena Jeevan ,&nbsp;Dr. Elizabeth Bilodeau ,&nbsp;Dr. Anitha Potluri","doi":"10.1016/j.oooo.2024.11.054","DOIUrl":"10.1016/j.oooo.2024.11.054","url":null,"abstract":"<div><h3>Clinical Presentation</h3><div>A 97-year-old female patient was presented to a private dental clinic for evaluation and treatment due to pain in her lower jaw. The patient had ill-fitting complete and partial dentures and severe bone loss and mobility of the remaining teeth. The patient was on multiple medications. A cone beam computed tomography (CT) was recommended as part of the treatment plan. Along with common clinical findings, the cone beam CT exposed significant degenerative changes with the C-spine and atherosclerotic calcifications in the internal carotids. A rare finding consisting of bilateral calcifications was noted with cartilaginous parts of Eustachian tubes. The calcifications appear as tear drop structures.</div></div><div><h3>Differential Diagnosis</h3><div>The various lesions considered for reasonable diagnostic possibilities include calcifications of the torus tubarius, tubal tonsils, and other dystrophic calcifications of soft tissues in the region.</div></div><div><h3>Diagnosis and Management</h3><div>The bilateral, teardrop structures were diagnosed as rare calcifications of the torus tubarius, which are mucosal elevations of the cartilaginous portions of the Eustachian tubes. As no clinical significance has yet been established, no further treatment is warranted.</div></div><div><h3>Conclusion</h3><div>Torus tubarius calcifications are rare; however, they increase in occurrence with aging. One study noted 0.6% prevalence in a 1571-patient dataset. The first report of these calcifications on a CT was presented by Mafee et al. in 2011. A case report of a 67-year-old woman with a medical history of hyperthyroidism, presented by Syed et al, reported similar ossifications of the Eustachian tube. Even though no clinical significance is established, loss of elasticity of the cartilages due to calcification leading to Eustachian tube dysfunction for elderly people, including otitis media, is proposed by Mafee et al. Torus tubarius calcifications can easily be confused with calcifications of tubal tonsils, as they are very close to each other.</div></div>","PeriodicalId":49010,"journal":{"name":"Oral Surgery Oral Medicine Oral Pathology Oral Radiology","volume":"139 3","pages":"Page e88"},"PeriodicalIF":2.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effectiveness of a metal artifact reduction algorithm on the imaging of titanium and zirconium implants: preliminary results","authors":"Dr. Youngjae Kim ,&nbsp;Dr. Massieh Moayedi ,&nbsp;Dr. Jim Lai ,&nbsp;Dr. Anil Kishen ,&nbsp;Dr. Ernest Lam","doi":"10.1016/j.oooo.2024.11.053","DOIUrl":"10.1016/j.oooo.2024.11.053","url":null,"abstract":"<div><h3>Objective</h3><div>To quantify, in 3 dimensions, the degree of metal artifacts arising from titanium and zirconium dental implants on cone beam computed tomography images, and to evaluate the effectiveness of one metal artifact reduction (MAR) algorithm on reducing the metal artifacts produced by such dental implants.</div></div><div><h3>Study Design</h3><div>Four titanium- and 4 zirconium-based bone-level dental implants were placed centrally into bovine rib blocks of equal size. The rib blocks were submerged in water and subjected to cone beam computed tomography imaging, before and after implant placement. A postacquisition metal artifact reduction (MAR) algorithm was subsequently applied to the image volumes. The imaged rib blocks before and after implant placement were aligned, and a voxel-wise analysis was conducted to independently quantify the volumes of “light” and “dark” components of the metal artifacts before and after MAR application using FMRIB's Software Library (FSL, Oxford, UK).</div></div><div><h3>Results</h3><div>The preliminary results do not show a statistically significant reduction in either the “light” or “dark” components of the metal artifacts when the MAR algorithm is invoked for both implant types.</div></div><div><h3>Conclusion</h3><div>On the basis of the preliminary findings, the application of the MAR algorithm does not effectively reduce metal artifacts originating from titanium and zirconium dental implants. We intend to increase the sample size to align with our earlier work, and re-run the analysis to confirm this result.</div></div>","PeriodicalId":49010,"journal":{"name":"Oral Surgery Oral Medicine Oral Pathology Oral Radiology","volume":"139 3","pages":"Pages e87-e88"},"PeriodicalIF":2.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An unusual lesion in the mandible: a puzzling case","authors":"Dr. Noor Algafly ,&nbsp;Dr. Abrar Alamoudi ,&nbsp;Dr. Ali Syed","doi":"10.1016/j.oooo.2024.11.062","DOIUrl":"10.1016/j.oooo.2024.11.062","url":null,"abstract":"<div><h3>Clinical Presentation</h3><div>A 39-year-old African American male patient referred to oral maxillofacial surgery after multiple consultations with outside clinic for incidental finding of right posterior mandibular lesion. Patient had a history of multiple superficial biopsies with inconclusive results. Extraoral examination showed right facial swelling at the level of the mandibular angle. The patient was asymptomatic and without lymphadenopathy. The intraoral examination revealed stable and reproducible occlusion, significant mandibular expansion, and normal mucosal covering.</div><div>A panoramic radiograph revealed a well-defined, corticated multilocular radiolucent space-occupying mass with thick straight septa and scalloped borders involving the right mandible. Displacement and thinning of the cortical border of the ramus were noted. IAC is displaced. Multidetector computed tomography scan showed that the lesion occupied the whole buccolingual width of the ramus and body of the mandible. Internal density of the lesion revealed soft-tissue density on the basis of Hounsfield unit.</div></div><div><h3>Differential Diagnosis</h3><div>The differential diagnoses for the lesion were benign odontogenic or nonodontogenic tumor/cyst or tumor like lesion ameloblastoma, odontogenic keratocyst or brown tumor.</div></div><div><h3>Diagnosis and Management</h3><div>The biopsy revealed a dense fibrous connective tissue with focal myxoid degeneration and mild chronic inflammation. Due to the history of multiple nonconclusive previous biopsies, a diagnosis of idiopathic bone cavity (IBC) with irregular behavior was provided radiographic monitoring recommended and follow-up showed significant healing.</div></div><div><h3>Discussion/Conclusion</h3><div>IBC is a benign bone lesion that occurs in the mandible. This condition is characterized by the formation of a cyst-like structure within the bone tissue, which is often asymptomatic and discovered incidentally during radiographic examination.</div><div>This case highlights the diagnostic and therapeutic challenges associated with IBC. The clinical presentation of IBC is variable, and the lesion can be easily mistaken for other conditions, such as a tumor or a cystic lesion.</div><div>Radiographic imaging is crucial both in diagnosis and follow ups.</div></div>","PeriodicalId":49010,"journal":{"name":"Oral Surgery Oral Medicine Oral Pathology Oral Radiology","volume":"139 3","pages":"Page e91"},"PeriodicalIF":2.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}