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Convolutional neural networks for automated tooth numbering on panoramic radiographs: A scoping review. 卷积神经网络用于全景 X 光片上的自动牙齿编号:范围综述。
IF 1.8 Q2 Dentistry Pub Date : 2023-12-01 Epub Date: 2023-09-04 DOI: 10.5624/isd.20230058
Ramadhan Hardani Putra, Eha Renwi Astuti, Aga Satria Nurrachman, Dina Karimah Putri, Ahmad Badruddin Ghazali, Tjio Andrinanti Pradini, Dhinda Tiara Prabaningtyas

Purpose: The objective of this scoping review was to investigate the applicability and performance of various convolutional neural network (CNN) models in tooth numbering on panoramic radiographs, achieved through classification, detection, and segmentation tasks.

Material and methods: An online search was performed of the PubMed, Science Direct, and Scopus databases. Based on the selection process, 12 studies were included in this review.

Results: Eleven studies utilized a CNN model for detection tasks, 5 for classification tasks, and 3 for segmentation tasks in the context of tooth numbering on panoramic radiographs. Most of these studies revealed high performance of various CNN models in automating tooth numbering. However, several studies also highlighted limitations of CNNs, such as the presence of false positives and false negatives in identifying decayed teeth, teeth with crown prosthetics, teeth adjacent to edentulous areas, dental implants, root remnants, wisdom teeth, and root canal-treated teeth. These limitations can be overcome by ensuring both the quality and quantity of datasets, as well as optimizing the CNN architecture.

Conclusion: CNNs have demonstrated high performance in automated tooth numbering on panoramic radiographs. Future development of CNN-based models for this purpose should also consider different stages of dentition, such as the primary and mixed dentition stages, as well as the presence of various tooth conditions. Ultimately, an optimized CNN architecture can serve as the foundation for an automated tooth numbering system and for further artificial intelligence research on panoramic radiographs for a variety of purposes.

目的:本综述旨在通过分类、检测和分割任务,研究各种卷积神经网络(CNN)模型在全景X光片牙齿编号中的适用性和性能:对 PubMed、Science Direct 和 Scopus 数据库进行了在线搜索。结果:有 11 项研究利用 CNN 进行了检测:结果:有 11 项研究利用 CNN 模型完成了检测任务,5 项研究利用 CNN 模型完成了分类任务,3 项研究利用 CNN 模型完成了全景照片上牙齿编号的分割任务。大多数研究显示,各种 CNN 模型在自动进行牙齿编号方面表现出色。不过,一些研究也强调了 CNN 的局限性,例如在识别蛀牙、带牙冠修复体的牙齿、邻近无牙区的牙齿、牙种植体、残根、智齿和根管治疗过的牙齿时存在假阳性和假阴性。这些限制可以通过确保数据集的质量和数量以及优化 CNN 架构来克服:CNN在全景X光片的自动牙齿编号方面表现出了很高的性能。未来为此目的开发基于 CNN 的模型时,还应考虑不同的牙列阶段,如原牙列和混合牙列阶段,以及各种牙齿状况。最终,优化的 CNN 架构可作为自动牙齿编号系统的基础,并可用于全景射线照片的进一步人工智能研究,以实现各种目的。
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引用次数: 0
Anatomic evaluation of the posterior superior alveolar artery using cone-beam computed tomography: A systematic review and meta-analysis. 锥束计算机断层扫描对牙槽后上动脉的解剖学评估:一项系统综述和荟萃分析。
IF 1.8 Q2 Dentistry Pub Date : 2023-09-01 Epub Date: 2023-08-02 DOI: 10.5624/isd.20230009
Faraz Radmand, Tahmineh Razi, Milad Baseri, Leili Faraji Gavgani, Fatemeh Salehnia, Masoumeh Faramarzi

Purpose: This systematic review examined the detection of the posterior superior alveolar artery, along with various anatomic characteristics, on cone-beam computed tomography images.

Materials and methods: Studies were identified electronically through the Web of Science, MEDLINE, Scopus, and Embase databases. The quality of the included studies was evaluated using a 5-item binary scale. The detection rate, location, and classified diameter of the posterior superior alveolar artery were estimated as prevalence values. The diameter of this artery, as well as the distances from the artery to the alveolar crest and sinus floor, were estimated as means with associated 95% confidence intervals.

Results: Thirty-seven studies were enrolled, with 34 of these included in the meta-analysis. The mean detection rate was 79% (range: 72%-84%), and the mean diameter was 1.06±0.05 mm (range: 0.96-1.16 mm). The posterior superior alveolar artery was located intraosseously in 64% of cases. The mean distance of the artery from the alveolar crest was 16.71±0.49 mm (range: 15.75-17.68 mm), while the mean distance from the artery to the sinus floor was 8.85±0.4 mm (range: 8.05-9.64 mm).

Conclusion: According to the findings of this meta-analysis regarding various anatomic characteristics of the posterior superior alveolar artery, severe hemorrhage after damage to this artery during sinus augmentation procedures is not a substantial clinical problem.

目的:本系统综述检查了锥束计算机断层扫描图像上牙槽后上动脉的检测以及各种解剖特征。材料和方法:研究通过Web of Science、MEDLINE、Scopus和Embase数据库进行电子鉴定。纳入研究的质量采用5项二元量表进行评估。肺泡后上动脉的检出率、位置和分类直径被估计为患病率值。该动脉的直径以及从动脉到牙槽嵴和窦底的距离被估计为相关95%置信区间的平均值。结果:37项研究入选,其中34项纳入荟萃分析。平均检出率为79%(范围:72%-84%),平均直径为1.06±0.05mm(范围:0.96-1.16mm)。64%的病例牙槽后上动脉位于骨内。动脉与牙槽嵴的平均距离为16.71±0.49mm(范围:15.75-17.68mm),而动脉与窦底的平均距离则为8.85±0.4mm(范围:8.05-9.64mm),在鼻窦扩张手术中,该动脉受损后的严重出血并不是一个实质性的临床问题。
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引用次数: 0
Correspondence: ChatGPT and scientific writing. 通讯:ChatGPT和科学写作。
IF 1.8 Q2 Dentistry Pub Date : 2023-09-01 Epub Date: 2023-09-04 DOI: 10.5624/isd.20230145
Rujittika Mungmunpuntipantip, Amnuay Kleebayoon, Viroj Wiwanitkit
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引用次数: 0
Ectopic teeth with disparate migration: A literature review and new case series. 具有不同迁移的异位牙齿:文献综述和新的病例系列。
IF 1.8 Q2 Dentistry Pub Date : 2023-09-01 Epub Date: 2023-06-20 DOI: 10.5624/isd.20230040
Pallak Arora, Madhu K Nair, Hui Liang, Paras B Patel, John M Wright, Mehrnaz Tahmasbi-Arashlow

Purpose: Ectopic eruption can be defined as the emergence of a tooth in an abnormal location, where the tooth does not follow its typical eruption pathway. While ectopic eruption within the dentate region is well-documented in the literature, ectopic eruption in non-dentate regions is relatively rare. This study aimed to report 6 cases of ectopic teeth and present a systematic review of the English-language literature on ectopic teeth, emphasizing demographic characteristics, radiographic features, potential complications, and treatment options.

Materials and methods: A literature search was conducted using the PubMed, Medline, Web of Science, and Cochrane databases. The demographic data and radiographic findings of patients presenting with ectopic teeth were recorded.

Results: The literature review yielded 61 cases of ectopic teeth, with patients ranging in age from 3 to 74 years. The findings from these previously reported cases demonstrated that the most common location for ectopic teeth was the maxillary sinus, which is consistent with this case series. The Pearson chi-square test was performed to evaluate the correlation between age and location of ectopic teeth, and the results were found to be statistically significant (P<0.05). However, no statistically significant relationship was observed between sex and the location of ectopic teeth.

Conclusion: The distinct features of these cases warrant reporting. This study presents the first case of supernumerary teeth in the condyle without any associated pathosis. Another notable characteristic is the pre-eruptive resorption of 2 inverted supernumerary teeth ectopically located in the palate, which predisposes to sinus opacification.

目的:异位萌出可以定义为牙齿出现在异常位置,牙齿不遵循其典型的萌出路径。虽然文献中有充分的文献记载,但非牙齿区域的异位萌出相对罕见。本研究旨在报告6例异位牙齿病例,并对异位牙齿的英语文献进行系统回顾,强调人口统计学特征、放射学特征、潜在并发症和治疗选择。材料和方法:使用PubMed、Medline、Web of Science和Cochrane数据库进行文献检索。记录异位牙齿患者的人口统计学数据和放射学检查结果。结果:文献回顾共发现61例异位牙,患者年龄从3岁到74岁不等。这些先前报道的病例的研究结果表明,异位牙齿最常见的位置是上颌窦,这与本系列病例一致。Pearson卡方检验用于评估年龄和异位牙齿位置之间的相关性,结果具有统计学意义(结论:这些病例的独特特征值得报告。本研究报告了第一例髁突多生牙齿,没有任何相关的病理学。另一个显著特征是位于腭外的2颗倒置多生牙齿在萌出前吸收,易导致鼻窦混浊。
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引用次数: 0
Efficiency and accuracy of artificial intelligence in the radiographic detection of periodontal bone loss: A systematic review. 人工智能在牙周骨丢失放射学检测中的效率和准确性:一项系统综述。
IF 1.8 Q2 Dentistry Pub Date : 2023-09-01 Epub Date: 2023-08-02 DOI: 10.5624/isd.20230092
Asmhan Tariq, Fatmah Bin Nakhi, Fatema Salah, Gabass Eltayeb, Ghada Jassem Abdulla, Noor Najim, Salma Ahmed Khedr, Sara Elkerdasy, Natheer Al-Rawi, Sausan Alkawas, Marwan Mohammed, Shishir Ram Shetty

Purpose: Artificial intelligence (AI) is poised to play a major role in medical diagnostics. Periodontal disease is one of the most common oral diseases. The early diagnosis of periodontal disease is essential for effective treatment and a favorable prognosis. This study aimed to assess the effectiveness of AI in diagnosing periodontal bone loss through radiographic analysis.

Materials and methods: A literature search involving 5 databases (PubMed, ScienceDirect, Scopus, Health and Medical Collection, Dentistry and Oral Sciences) was carried out. A specific combination of keywords was used to obtain the articles. The PRISMA guidelines were used to filter eligible articles. The study design, sample size, type of AI software, and the results of each eligible study were analyzed. The CASP diagnostic study checklist was used to evaluate the evidence strength score.

Results: Seven articles were eligible for review according to the PRISMA guidelines. Out of the 7 eligible studies, 4 had strong CASP evidence strength scores (7-8/9). The remaining studies had intermediate CASP evidence strength scores (3.5-6.5/9). The highest area under the curve among the reported studies was 94%, the highest F1 score was 91%, and the highest specificity and sensitivity were 98.1% and 94%, respectively.

Conclusion: AI-based detection of periodontal bone loss using radiographs is an efficient method. However, more clinical studies need to be conducted before this method is introduced into routine dental practice.

目的:人工智能(AI)将在医学诊断中发挥重要作用。牙周病是最常见的口腔疾病之一。牙周病的早期诊断对于有效的治疗和良好的预后至关重要。本研究旨在通过放射学分析评估人工智能在诊断牙周骨丢失方面的有效性。材料和方法:文献检索涉及5个数据库(PubMed、ScienceDirect、Scopus、Health and Medical Collection、Dentistry and Oral Sciences)。使用特定的关键字组合来获得这些文章。PRISMA指南用于筛选符合条件的文章。对研究设计、样本量、人工智能软件类型以及每项合格研究的结果进行了分析。CASP诊断研究检查表用于评估证据强度评分。结果:根据PRISMA指南,有7篇文章符合审查条件。在7项符合条件的研究中,4项具有较强的CASP证据强度得分(7-8/9)。其余研究的CASP证据强度得分为中等(3.5-6.5/9)。报告研究中曲线下面积最高为94%,F1得分最高为91%,特异性和敏感性最高分别为98.1%和94%。结论:基于AI的牙周骨丢失X线片检测是一种有效的方法。然而,在将这种方法引入常规牙科实践之前,还需要进行更多的临床研究。
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引用次数: 0
Hand-held dental X-ray device: Attention to correct use. 手持式牙科X光机:注意正确使用。
IF 1.8 Q2 Dentistry Pub Date : 2023-09-01 Epub Date: 2023-09-04 DOI: 10.5624/isd.20230137
Guilherme Ceschia Martins, Thaíza Gonçalves Rocha, Thaís de Lima Azeredo, Andréa de Castro Domingos, Maria Augusta Visconti, Eduardo Murad Villoria
Dear Editors, Since the early 20th century, protection from the deleterious effects of ionizing radiation in diagnostic imaging examinations has been a much-discussed topic. At present, there is a consensus among safety agencies about the need to try, whenever possible, to reduce the levels of radiation to which professionals and patients are exposed, based on the ALARA (as low as reasonably achievable), ALADA (as low as diagnostically acceptable) and ALADAIP (as low as diagnostically acceptable being indication-oriented and patientspecific) principles. The last decade has been marked by growth in the sale and use of portable hand-held X-ray devices in dental offices and universities. Since the use of these devices makes it difficult for the operator to maintain a distance of 2 meters between the radiation source and patient, it is necessary to clarify the radioprotection norms. Given the lack of clear, concise, and direct information on this topic, this Letter to the Editor is extremely relevant. The development of the portable hand-held dental X-ray device has led to several advantages, including a reduction in size and weight, which allows for easy transportation to any required location. This makes it an appealing option for use in a surgical center during operations, in forensic dentistry, community work, and home care. However, the use of portable hand-held X-ray devices in routine dental care is not recommended due to the secondary radiation dose that the operator may receive during radiographic examinations. Studies have been conducted to develop protocols that ensure excellent operator safety, reducing or avoiding exposure to radiation. Protective measures have proven effective in reducing the radiation dose to the operator, thereby enhancing protection against secondary radiation during radiographic exams conducted with portable hand-held dental X-ray devices. These measures include 1) operating the portable device with arms fully extended to maintain distance from the body, 2) using a backscatter shield on the cylinder, 3) employing a longer cylinder, 4) wearing protective aprons, 5) using lead gloves, and 6) utilizing a rectangular collimator. These precautions are particularly crucial when the operator is in close proximity to both the radiation source and the patient. Additionally, staff members and the public should maintain a distance of 2 meters from both the patient and the radiation source, and avoid standing in the path of the central X-ray beam. It is important to emphasize that radioprotection measures will only minimize the effective dose received by the professional if the operator holds the device during the examination. Only when portable hand-held dental X-ray devices are used on a stand and operated from a protected area (either 2 meters away or behind a barrier), similar to the usage of conventional radiographic devices, can operators be fully safeguarded against secondary radiation. Consequently, manufacturers should
{"title":"Hand-held dental X-ray device: Attention to correct use.","authors":"Guilherme Ceschia Martins,&nbsp;Thaíza Gonçalves Rocha,&nbsp;Thaís de Lima Azeredo,&nbsp;Andréa de Castro Domingos,&nbsp;Maria Augusta Visconti,&nbsp;Eduardo Murad Villoria","doi":"10.5624/isd.20230137","DOIUrl":"10.5624/isd.20230137","url":null,"abstract":"Dear Editors, Since the early 20th century, protection from the deleterious effects of ionizing radiation in diagnostic imaging examinations has been a much-discussed topic. At present, there is a consensus among safety agencies about the need to try, whenever possible, to reduce the levels of radiation to which professionals and patients are exposed, based on the ALARA (as low as reasonably achievable), ALADA (as low as diagnostically acceptable) and ALADAIP (as low as diagnostically acceptable being indication-oriented and patientspecific) principles. The last decade has been marked by growth in the sale and use of portable hand-held X-ray devices in dental offices and universities. Since the use of these devices makes it difficult for the operator to maintain a distance of 2 meters between the radiation source and patient, it is necessary to clarify the radioprotection norms. Given the lack of clear, concise, and direct information on this topic, this Letter to the Editor is extremely relevant. The development of the portable hand-held dental X-ray device has led to several advantages, including a reduction in size and weight, which allows for easy transportation to any required location. This makes it an appealing option for use in a surgical center during operations, in forensic dentistry, community work, and home care. However, the use of portable hand-held X-ray devices in routine dental care is not recommended due to the secondary radiation dose that the operator may receive during radiographic examinations. Studies have been conducted to develop protocols that ensure excellent operator safety, reducing or avoiding exposure to radiation. Protective measures have proven effective in reducing the radiation dose to the operator, thereby enhancing protection against secondary radiation during radiographic exams conducted with portable hand-held dental X-ray devices. These measures include 1) operating the portable device with arms fully extended to maintain distance from the body, 2) using a backscatter shield on the cylinder, 3) employing a longer cylinder, 4) wearing protective aprons, 5) using lead gloves, and 6) utilizing a rectangular collimator. These precautions are particularly crucial when the operator is in close proximity to both the radiation source and the patient. Additionally, staff members and the public should maintain a distance of 2 meters from both the patient and the radiation source, and avoid standing in the path of the central X-ray beam. It is important to emphasize that radioprotection measures will only minimize the effective dose received by the professional if the operator holds the device during the examination. Only when portable hand-held dental X-ray devices are used on a stand and operated from a protected area (either 2 meters away or behind a barrier), similar to the usage of conventional radiographic devices, can operators be fully safeguarded against secondary radiation. Consequently, manufacturers should","PeriodicalId":51714,"journal":{"name":"Imaging Science in Dentistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/eb/86/isd-53-265.PMC10548154.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41120193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determining the reliability of diagnosis and treatment using artificial intelligence software with panoramic radiographs. 使用人工智能软件通过全景射线照片确定诊断和治疗的可靠性。
IF 1.8 Q2 Dentistry Pub Date : 2023-09-01 Epub Date: 2023-08-02 DOI: 10.5624/isd.20230109
Kaan Orhan, Ceren Aktuna Belgin, David Manulis, Maria Golitsyna, Seval Bayrak, Secil Aksoy, Alex Sanders, Merve Önder, Matvey Ezhov, Mamat Shamshiev, Maxim Gusarev, Vladislav Shlenskii

Purpose: The objective of this study was to evaluate the accuracy and effectiveness of an artificial intelligence (AI) program in identifying dental conditions using panoramic radiographs (PRs), as well as to assess the appropriateness of its treatment recommendations.

Material and methods: PRs from 100 patients (representing 4497 teeth) with known clinical examination findings were randomly selected from a university database. Three dentomaxillofacial radiologists and the Diagnocat AI software evaluated these PRs. The evaluations were focused on various dental conditions and treatments, including canal filling, caries, cast post and core, dental calculus, fillings, furcation lesions, implants, lack of interproximal tooth contact, open margins, overhangs, periapical lesions, periodontal bone loss, short fillings, voids in root fillings, overfillings, pontics, root fragments, impacted teeth, artificial crowns, missing teeth, and healthy teeth.

Results: The AI demonstrated almost perfect agreement (exceeding 0.81) in most of the assessments when compared to the ground truth. The sensitivity was very high (above 0.8) for the evaluation of healthy teeth, artificial crowns, dental calculus, missing teeth, fillings, lack of interproximal contact, periodontal bone loss, and implants. However, the sensitivity was low for the assessment of caries, periapical lesions, pontic voids in the root canal, and overhangs.

Conclusion: Despite the limitations of this study, the synthesized data suggest that AI-based decision support systems can serve as a valuable tool in detecting dental conditions, when used with PR for clinical dental applications.

目的:本研究的目的是评估人工智能(AI)程序在使用全景放射学(PR)识别牙齿状况方面的准确性和有效性,并评估其治疗建议的适当性。材料和方法:从大学数据库中随机选择100名已知临床检查结果的患者(代表4497颗牙齿)的PR。三位牙颌面放射科医生和Diagnocat AI软件对这些PR进行了评估。评估的重点是各种牙齿状况和治疗方法,包括管充填、龋齿、铸造桩核、牙石、填充物、分叉病变、种植体、邻牙接触不足、开放边缘、悬突、根尖周病变、牙周骨丢失、短填充物、根填充物中的空隙、过度填充、桥体、根碎片、阻生牙,人造牙冠、缺失的牙齿和健康的牙齿。结果:与基本事实相比,AI在大多数评估中表现出几乎完全一致(超过0.81)。评估健康牙齿、人工牙冠、牙石、缺失牙齿、填充物、缺乏邻间接触、牙周骨丢失和植入物的敏感性非常高(超过0.8)。然而,对龋齿、根尖周病变、根管桥体空洞和悬突的评估敏感性较低。结论:尽管本研究存在局限性,但综合数据表明,当与PR一起用于临床牙科应用时,基于人工智能的决策支持系统可以作为检测牙科状况的有价值工具。
{"title":"Determining the reliability of diagnosis and treatment using artificial intelligence software with panoramic radiographs.","authors":"Kaan Orhan,&nbsp;Ceren Aktuna Belgin,&nbsp;David Manulis,&nbsp;Maria Golitsyna,&nbsp;Seval Bayrak,&nbsp;Secil Aksoy,&nbsp;Alex Sanders,&nbsp;Merve Önder,&nbsp;Matvey Ezhov,&nbsp;Mamat Shamshiev,&nbsp;Maxim Gusarev,&nbsp;Vladislav Shlenskii","doi":"10.5624/isd.20230109","DOIUrl":"10.5624/isd.20230109","url":null,"abstract":"<p><strong>Purpose: </strong>The objective of this study was to evaluate the accuracy and effectiveness of an artificial intelligence (AI) program in identifying dental conditions using panoramic radiographs (PRs), as well as to assess the appropriateness of its treatment recommendations.</p><p><strong>Material and methods: </strong>PRs from 100 patients (representing 4497 teeth) with known clinical examination findings were randomly selected from a university database. Three dentomaxillofacial radiologists and the Diagnocat AI software evaluated these PRs. The evaluations were focused on various dental conditions and treatments, including canal filling, caries, cast post and core, dental calculus, fillings, furcation lesions, implants, lack of interproximal tooth contact, open margins, overhangs, periapical lesions, periodontal bone loss, short fillings, voids in root fillings, overfillings, pontics, root fragments, impacted teeth, artificial crowns, missing teeth, and healthy teeth.</p><p><strong>Results: </strong>The AI demonstrated almost perfect agreement (exceeding 0.81) in most of the assessments when compared to the ground truth. The sensitivity was very high (above 0.8) for the evaluation of healthy teeth, artificial crowns, dental calculus, missing teeth, fillings, lack of interproximal contact, periodontal bone loss, and implants. However, the sensitivity was low for the assessment of caries, periapical lesions, pontic voids in the root canal, and overhangs.</p><p><strong>Conclusion: </strong>Despite the limitations of this study, the synthesized data suggest that AI-based decision support systems can serve as a valuable tool in detecting dental conditions, when used with PR for clinical dental applications.</p>","PeriodicalId":51714,"journal":{"name":"Imaging Science in Dentistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/b1/6b/isd-53-199.PMC10548159.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41175043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Head and neck manifestations of fibrodysplasia ossificans progressiva: Clinical and imaging findings in 2 cases. 进行性骨化性纤维发育不良的头颈部表现:2例临床和影像学表现。
IF 1.8 Q2 Dentistry Pub Date : 2023-09-01 Epub Date: 2023-06-20 DOI: 10.5624/isd.20230069
Gyu-Dong Jo, Ju-Hee Kang, Jo-Eun Kim, Won-Jin Yi, Min-Suk Heo, Sam-Sun Lee, Kyung-Hoe Huh

Fibrodysplasia ossificans progressiva is a rare hereditary disorder characterized by progressive heterotopic ossification in muscle and connective tissue, with few reported cases affecting the head and neck region. Although plain radiographic findings and computed tomography features have been well documented, limited reports exist on magnetic resonance findings. This report presents 2 cases of fibrodysplasia ossificans progressiva, one with limited mouth opening due to heterotopic ossification of the lateral pterygoid muscle and the other with restricted neck movement due to heterotopic ossification of the platysma muscle. Clinical findings of restricted mouth opening or limited neck movement, along with radiological findings of associated heterotopic ossification, should prompt consideration of fibrodysplasia ossificans progressiva in the differential diagnosis. Dentists should be particularly vigilant with patients diagnosed with fibrodysplasia ossificans progressiva to avoid exposure to diagnostic biopsy and invasive dental procedures.

进行性骨化性纤维发育不良是一种罕见的遗传性疾病,其特征是肌肉和结缔组织进行性异位骨化,很少有报道涉及头颈部。尽管平面放射学检查结果和计算机断层扫描特征已被充分记录,但关于磁共振检查结果的报道有限。本报告报告2例进行性骨化性纤维发育不良,一例由于翼外肌异位骨化导致开口受限,另一例由于颈阔肌异位骨化而导致颈部活动受限。口腔张开受限或颈部活动受限的临床表现,以及相关异位骨化的放射学表现,应促使在鉴别诊断中考虑进行性骨化纤维发育不良。牙医应特别警惕被诊断为进行性骨化性纤维发育不良的患者,避免接触诊断性活检和侵入性牙科手术。
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引用次数: 0
A pilot study of half-value layer measurements using a semiconductor dosimeter for intraoral radiography. 一项使用半导体剂量计进行口内射线照相半值层测量的初步研究。
IF 1.8 Q2 Dentistry Pub Date : 2023-09-01 Epub Date: 2023-06-20 DOI: 10.5624/isd.20230039
Shun Nouchi, Hidenori Yoshida, Yusaku Miki, Yasuhito Tezuka, Ruri Ogawa, Ichiro Ogura

Purpose: This pilot study was conducted to evaluate half-value layer (HVL) measurements obtained using a semiconductor dosimeter for intraoral radiography.

Materials and methods: This study included 8 aluminum plates, 4 of which were low-purity (less than 99.9%) and 4 high-purity (greater than 99.9%). Intraoral radiography was performed using an intraoral X-ray unit in accordance with the dental protocol at the authors' affiliated hospital: tube voltage, 60 kVp and 70 kVp; tube current, 7 mA; and exposure time, 0.10 s. The accuracy of HVL measurements for intraoral radiography was assessed using a semiconductor dosimeter. A simple regression analysis was performed to compare the aluminum plate thickness and HVL in relation to the tube voltage (60 kVp and 70 kVp) and aluminum purity (low and high).

Results: For the low-purity aluminum plates, the HVL at 60 kVp (Y) and 70 kVp (Y) was significantly correlated with the thickness of the aluminum plate (X), with Y = 1.708 + 0.415X (r=0.999, P<0.05) and Y = 1.980 + 0.484X (r=0.999, P<0.05), respectively. Similarly, for the high-purity aluminum plates, the HVL at 60 kVp (Y) and 70 kVp (Y) was significantly correlated with the plate thickness (X), with Y = 1.696 + 0.454X (r=0.999, P<0.05) and Y = 1.968 + 0.515X (r=0.998, P<0.05), respectively.

Conclusion: This pilot study examined the relationship between aluminum plate thickness and HVL measurements using a semiconductor dosimeter for intraoral radiography. Semiconductor dosimeters may prove useful in HVL measurement for purposes such as quality assurance in dental X-ray imaging.

目的:进行这项初步研究是为了评估使用半导体剂量计进行口腔内放射照相的半值层(HVL)测量结果。材料和方法:本研究包括8块铝板,其中4块为低纯度(低于99.9%),4块为高纯度(高于99.9%)。根据作者附属医院的牙科协议,使用口腔内X射线装置进行口腔内放射照相术:管电压,60 kVp和70 kVp;管电流,7mA;暴露时间为0.10s。使用半导体剂量计评估口腔内放射照相术的HVL测量的准确性。通过简单回归分析比较了铝板厚度和HVL与管电压(60kVp和70kVp)和铝纯度(低和高)的关系,Y=1.708+0.415X(r=0.999,PPPPC结论:这项初步研究使用半导体剂量计进行口腔内放射照相,检查了铝板厚度与HVL测量之间的关系。半导体剂量计可能在HVL测量中有用,用于牙科X射线成像的质量保证等目的。
{"title":"A pilot study of half-value layer measurements using a semiconductor dosimeter for intraoral radiography.","authors":"Shun Nouchi,&nbsp;Hidenori Yoshida,&nbsp;Yusaku Miki,&nbsp;Yasuhito Tezuka,&nbsp;Ruri Ogawa,&nbsp;Ichiro Ogura","doi":"10.5624/isd.20230039","DOIUrl":"10.5624/isd.20230039","url":null,"abstract":"<p><strong>Purpose: </strong>This pilot study was conducted to evaluate half-value layer (HVL) measurements obtained using a semiconductor dosimeter for intraoral radiography.</p><p><strong>Materials and methods: </strong>This study included 8 aluminum plates, 4 of which were low-purity (less than 99.9%) and 4 high-purity (greater than 99.9%). Intraoral radiography was performed using an intraoral X-ray unit in accordance with the dental protocol at the authors' affiliated hospital: tube voltage, 60 kVp and 70 kVp; tube current, 7 mA; and exposure time, 0.10 s. The accuracy of HVL measurements for intraoral radiography was assessed using a semiconductor dosimeter. A simple regression analysis was performed to compare the aluminum plate thickness and HVL in relation to the tube voltage (60 kVp and 70 kVp) and aluminum purity (low and high).</p><p><strong>Results: </strong>For the low-purity aluminum plates, the HVL at 60 kVp (Y) and 70 kVp (Y) was significantly correlated with the thickness of the aluminum plate (X), with Y = 1.708 + 0.415X (r=0.999, <i>P</i><0.05) and Y = 1.980 + 0.484X (r=0.999, <i>P</i><0.05), respectively. Similarly, for the high-purity aluminum plates, the HVL at 60 kVp (Y) and 70 kVp (Y) was significantly correlated with the plate thickness (X), with Y = 1.696 + 0.454X (r=0.999, <i>P</i><0.05) and Y = 1.968 + 0.515X (r=0.998, <i>P</i><0.05), respectively.</p><p><strong>Conclusion: </strong>This pilot study examined the relationship between aluminum plate thickness and HVL measurements using a semiconductor dosimeter for intraoral radiography. Semiconductor dosimeters may prove useful in HVL measurement for purposes such as quality assurance in dental X-ray imaging.</p>","PeriodicalId":51714,"journal":{"name":"Imaging Science in Dentistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/c7/95/isd-53-217.PMC10548152.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41159006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ancient schwannoma in the parotid gland: A case report and review of the literature. 腮腺古代神经鞘瘤:一例报告并文献复习。
IF 1.8 Q2 Dentistry Pub Date : 2023-09-01 Epub Date: 2023-09-04 DOI: 10.5624/isd.20230504
Young-Eun Kwon

Schwannomas are uncommon neoplasms of neurologic origin that are rare in the salivary glands. A schwannoma that persists for a long time is referred to as an ancient schwannoma if it is accompanied by degenerative changes on histology. The case described herein involved a 37-year-old man with an ancient schwannoma that had persisted for 20 years in his right parotid gland. Clinically, the lesion presented with swelling and pain. Computed tomography revealed a well-defined, multilocular enhanced lesion. T2-weighted magnetic resonance images displayed multilocular hyperintensity, while T1-weighted images showed a high signal at the lobulated margin and a homogeneous low signal internally. The preoperative diagnosis, based on the lesion's location and imaging diagnosis, was Warthin's tumor. However, a biopsy conducted after surgical excision identified the lesion as a schwannoma with cystic degeneration. This report also presents a summary of the characteristics of rare cases of schwannoma in the major salivary gland based on this case and a literature review.

神经鞘瘤是一种罕见的神经系统肿瘤,在唾液腺中很少见。如果伴有组织学退行性变化,则长期存在的神经鞘瘤被称为古神经鞘瘤。本文描述的病例涉及一名37岁的男子,他患有一种在右腮腺持续了20年的古老神经鞘瘤。临床上,病变表现为肿胀和疼痛。计算机断层扫描显示一个明确的多房增强病变。T2加权磁共振图像显示多房高信号,而T1加权图像显示小叶边缘的高信号和内部的均匀低信号。根据病变的位置和影像学诊断,术前诊断为Warthin肿瘤。然而,手术切除后进行的活检发现,该病变为伴有囊性变性的神经鞘瘤。本报告还总结了罕见的大唾液腺神经鞘瘤病例的特征,并对其进行了文献综述。
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引用次数: 0
期刊
Imaging Science in Dentistry
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