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Vertical root fracture diagnosis in teeth with metallic posts: Impact of metal artifact reduction and sharpening filters. 带金属支架牙齿的垂直根折诊断:减少金属伪影和锐化滤波器的影响。
IF 1.7 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-06-01 Epub Date: 2024-04-02 DOI: 10.5624/isd.20230233
Débora Costa Ruiz, Lucas P Lopes Rosado, Rocharles Cavalcante Fontenele, Amanda Farias-Gomes, Deborah Queiroz Freitas

Purpose: This study examined the influence of a metal artifact reduction (MAR) tool, sharpening filters, and their combination on the diagnosis of vertical root fracture (VRF) in teeth with metallic posts using cone-beam computed tomography (CBCT).

Materials and methods: Twenty single-rooted human premolars - 9 with VRF and 11 without - were individually placed in a human mandible. A metallic post composed of a cobalt-chromium alloy was inserted into the root canal of each tooth. CBCT scans were then acquired under the following parameters: 8 mA, a 5×5 cm field of view, a voxel size of 0.085 mm, 90 kVp, and with MAR either enabled or disabled. Five oral and maxillofacial radiologists independently evaluated the CBCT exams under each MAR mode and across 3 sharpening filter conditions: no filter, Sharpen 1×, and Sharpen 2×. The diagnostic performance was quantified by the area under the receiver operating characteristic curve (AUC), sensitivity, and specificity. These metrics were compared using 2-way analysis of variance with a significance level of α=5%. Intra- and inter-examiner agreement were assessed using the weighted kappa test.

Results: Neither MAR nor the application of sharpening filters significantly impacted AUC or specificity (P>0.05). However, sensitivity increased when MAR was combined with Sharpen 1× and Sharpen 2× (P=0.015). The intra-examiner agreement ranged from fair to substantial (0.34-0.66), while the inter-examiner agreement ranged from fair to moderate (0.27-0.41).

Conclusion: MAR in conjunction with sharpening filters improved VRF detection; therefore, their combined use is recommended in cases of suspected VRF.

目的:本研究利用锥形束计算机断层扫描(CBCT)技术,研究了金属伪影还原工具(MAR)、锐化滤波器及其组合对带有金属桩的牙齿垂直根折(VRF)诊断的影响:将 20 颗单根人类前臼齿(9 颗有 VRF,11 颗无 VRF)分别植入人类下颌骨。在每颗牙齿的根管内插入一个由钴铬合金组成的金属柱。然后在以下参数下采集 CBCT 扫描:8 mA、5×5 厘米视场、0.085 毫米体素大小、90 kVp,并启用或禁用 MAR。五名口腔颌面部放射科医生在每种 MAR 模式下和 3 种锐化滤镜条件(无滤镜、锐化 1 倍和锐化 2 倍)下对 CBCT 检查进行了独立评估。诊断性能通过接收者工作特征曲线下面积(AUC)、灵敏度和特异性进行量化。这些指标采用双向方差分析进行比较,显著性水平为 α=5%。使用加权卡帕检验对检查者内部和检查者之间的一致性进行评估:MAR和锐化滤波器的应用均未对AUC或特异性产生显著影响(P>0.05)。然而,当 MAR 与 Sharpen 1× 和 Sharpen 2× 结合使用时,灵敏度有所提高(P=0.015)。检查者内部的一致性从一般到相当(0.34-0.66)不等,而检查者之间的一致性从一般到中等(0.27-0.41)不等:结论:MAR 与锐化滤波器结合使用可提高 VRF 的检测率;因此,建议在怀疑有 VRF 的病例中将两者结合使用。
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引用次数: 0
Distribution of the intraosseous branch of the posterior superior alveolar artery relative to the posterior maxillary teeth. 牙槽后上动脉骨内分支相对于上颌后牙的分布。
IF 1.7 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-06-01 Epub Date: 2024-04-02 DOI: 10.5624/isd.20230160
Carsen R McDaniel, Thomas M Johnson, Brian W Stancoven, Adam R Lincicum

Purpose: Preoperative identification of the intraosseous posterior superior alveolar artery (PSAA) is critical when planning sinus surgery. This study was conducted to determine the distance between the cementoenamel junction and the PSAA, as well as to identify factors influencing the detection of the PSAA on cone-beam computed tomography (CBCT).

Materials and methods: In total, 254 CBCT scans of maxillary sinuses, acquired with 2 different scanners, were examined to identify the PSAA. The distance from the cementoenamel junction (CEJ) to the PSAA was recorded at each maxillary posterior tooth position. Binomial logistic regression and multiple linear regression were employed to evaluate the effects of scanner type, CBCT parameters, sex, and age on PSAA detection and CEJ-PSAA distance, respectively. P-values less than 0.05 were considered to indicate statistical significance.

Results: The mean CEJ-PSAA distances at the second molar, first molar, second premolar, and first premolar positions were 17.0±4.0 mm, 21.8±4.1 mm, 19.5±4.7 mm, and 19.9±4.9 mm for scanner 1, respectively, and 17.3±3.5 mm, 16.9±4.3 mm, 18.5±4.1 mm, and 18.4±4.3 mm for scanner 2. No independent variable significantly influenced PSAA detection. However, tooth position (b=-0.67, P<0.05) and scanner type (b=-1.3, P<0.05) were significant predictors of CEJ-PSAA distance.

Conclusion: CBCT-based estimates of CEJ-PSAA distance were comparable to those obtained in previous studies involving cadavers, CT, and CBCT. The type of CBCT scanner may slightly influence this measurement. No independent variable significantly impacted PSAA detection.

目的:在计划鼻窦手术时,术前识别骨内后上齿槽动脉(PSAA)至关重要。本研究旨在确定骨水泥釉交界处与 PSAA 之间的距离,以及确定影响锥束计算机断层扫描(CBCT)检测 PSAA 的因素:研究人员使用两种不同的扫描仪对 254 张上颌窦 CBCT 扫描图像进行了检查,以确定 PSAA。记录每个上颌后牙位置的牙本质釉质交界处(CEJ)到 PSAA 的距离。采用二项逻辑回归和多元线性回归分别评估了扫描仪类型、CBCT参数、性别和年龄对PSAA检测和CEJ-PSAA距离的影响。P值小于0.05为统计学意义:扫描仪 1 在第二磨牙、第一磨牙、第二前磨牙和第一前磨牙位置的平均 CEJ-PSAA 距离分别为 17.0±4.0mm、21.8±4.1mm、19.5±4.7mm 和 19.9±4.9mm,扫描仪 2 的平均 CEJ-PSAA 距离分别为 17.3±3.5mm、16.9±4.3mm、18.5±4.1mm 和 18.4±4.3mm。没有自变量对 PSAA 检测有明显影响。但是,牙齿位置(b=-0.67,PPConclusion:基于CBCT的CEJ-PSAA距离估计值与之前涉及尸体、CT和CBCT的研究结果相当。CBCT 扫描仪的类型可能会对这一测量结果略有影响。没有任何自变量会对 PSAA 检测产生重大影响。
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引用次数: 0
Evaluation of peri-implant bone defects on cone-beam computed tomography and the diagnostic accuracy of detecting these defects on panoramic images. 评估锥束计算机断层扫描上的种植体周围骨缺损以及在全景图像上检测这些缺损的诊断准确性。
IF 1.7 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-06-01 Epub Date: 2024-04-02 DOI: 10.5624/isd.20230258
Takayuki Oshima, Rieko Asaumi, Shin Ogura, Taisuke Kawai

Purpose: This study was conducted to identify the typical sites and patterns of peri-implant bone defects on cone-beam computed tomography (CBCT) images, as well as to evaluate the detectability of the identified bone defects on panoramic images.

Materials and methods: The study population included 114 patients with a total of 367 implant fixtures. CBCT images were used to assess the presence or absence of bone defects around each implant fixture at the mesial, distal, buccal, and lingual sites. Based on the number of defect sites, the presentations of the peri-implant bone defects were categorized into 3 patterns: 1 site, 2 or 3 sites, and circumferential bone defects. Two observers independently evaluated the presence or absence of bone defects on panoramic images. The bone defect detection rate on these images was evaluated using receiver operating characteristic analysis.

Results: Of the 367 implants studied, 167 (45.5%) had at least 1 site with a confirmed bone defect. The most common type of defect was circumferential, affecting 107 of the 167 implants (64.1%). Implants were most frequently placed in the mandibular molar region. The prevalence of bone defects was greatest in the maxillary premolar and mandibular molar regions. The highest kappa value was associated with the mandibular premolar region.

Conclusion: The typical bone defect pattern observed was a circumferential defect surrounding the implant. The detection rate was generally higher in the molar region than in the anterior region. However, the capacity to detect partial bone defects using panoramic imaging was determined to be poor.

目的:本研究旨在确定锥束计算机断层扫描(CBCT)图像上种植体周围骨缺损的典型部位和模式,并评估全景图像上已确定骨缺损的可探测性:研究对象包括 114 名患者,共使用了 367 个种植夹具。CBCT 图像用于评估每个种植体夹具的中侧、远侧、颊侧和舌侧周围是否存在骨缺损。根据缺损部位的数量,种植体周围骨缺损的表现分为 3 种模式:1 个部位、2 或 3 个部位以及周缘骨缺损。两名观察者独立评估全景图像上是否存在骨缺损。结果:在研究的 367 个种植体中,167 个(45.5%)至少有一个部位被证实存在骨缺损。最常见的缺损类型是周缘性缺损,167 个植入体中有 107 个(64.1%)受到影响。种植体最常植入下颌臼齿区。上颌前磨牙和下颌臼齿区的骨缺损发生率最高。下颌前磨牙区域的卡帕值最高:结论:观察到的典型骨缺损模式是种植体周围的环形缺损。臼齿区的检测率普遍高于前牙区。然而,使用全景成像检测部分骨缺损的能力较差。
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引用次数: 0
Impact of dental imaging on pregnant women and recommendations for fetal radiation safety: A systematic review. 牙科成像对孕妇的影响及胎儿辐射安全建议:系统综述。
IF 1.8 Q2 Dentistry Pub Date : 2024-03-01 Epub Date: 2024-01-04 DOI: 10.5624/isd.20230177
Thiago Oliveira Gamba, Fernanda Visioli, Deise Renata Bringmann, Pantelis Varvaki Rados, Heraldo Luis Dias da Silveira, Isadora Luana Flores

Purpose: This study was conducted to investigate the safety of dental imaging in pregnant women with respect to fetal health.

Materials and methods: Searches were conducted of the PubMed, Scopus, and Web of Science databases in May 2023. The inclusion criteria encompassed cross-sectional and longitudinal studies that focused on the analysis of diagnostic dental imaging in pregnant women, as well as studies utilizing phantoms to simulate imaging examinations. The exclusion criteria consisted of reviews, letters to the editor, book chapters, and abstracts from scientific conferences and seminars.

Results: A total of 3,913 articles were identified. Based on a review of the titles and abstracts, 3,892 articles were excluded, leaving 21 articles remaining for full-text review. Of these, 18 were excluded, and 4 additional articles were included as cross-references. Ultimately, 7 articles underwent quantitative-qualitative analysis. Three retrospective studies were focused on pregnant women who underwent dental imaging procedures. The remaining 4 studies utilized female phantoms to simulate imaging examinations and represent the radiation doses absorbed by the uterus or thyroid.

Conclusion: Few dental radiology studies have been conducted to determine the safe radiation threshold for pregnant women. Additionally, the reviewed articles did not provide numbers of dental examinations, by type, corresponding to this dose. Dental imaging examinations of pregnant women should not be restricted if clinically indicated. Ultimately, practitioners must be able to justify the examination and should adhere to the "as low as diagnostically acceptable, being indication-oriented and patient-specific" (ALADAIP) principle of radioprotection.

目的:本研究旨在调查孕妇牙科成像对胎儿健康的安全性:在 2023 年 5 月对 PubMed、Scopus 和 Web of Science 数据库进行了检索。纳入标准包括侧重于分析孕妇牙科成像诊断的横断面和纵向研究,以及利用模型模拟成像检查的研究。排除标准包括综述、致编辑的信、书籍章节以及科学会议和研讨会的摘要:结果:共发现 3,913 篇文章。根据对标题和摘要的审查,共排除了 3,892 篇文章,剩下 21 篇文章进行全文审查。其中,18 篇文章被排除,另外 4 篇文章作为交叉引用被纳入。最终有 7 篇文章进行了定量-定性分析。三项回顾性研究主要针对接受牙科成像手术的孕妇。其余 4 项研究利用女性模型模拟成像检查,并代表子宫或甲状腺吸收的辐射剂量:结论:为确定孕妇的安全辐射阈值而进行的牙科放射学研究很少。结论:很少有牙科放射学研究确定孕妇的安全辐射阈值,此外,所查阅的文章也没有提供与该剂量相对应的牙科检查次数(按类型划分)。如果有临床指征,不应限制对孕妇进行牙科成像检查。归根结底,从业人员必须能够证明检查的合理性,并应遵守 "诊断上可接受的最低剂量,以适应症为导向,以患者为具体对象"(ALADAIP)的辐射防护原则。
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引用次数: 0
Potential impact of metal crowns at varying distances from a carious lesion on its detection on cone-beam computed tomography scans with several protocols. 在锥形束计算机断层扫描扫描中,金属牙冠与龋齿病灶的不同距离对检测龋齿病灶的潜在影响。
IF 1.8 Q2 Dentistry Pub Date : 2024-03-01 Epub Date: 2024-01-04 DOI: 10.5624/isd.20230202
Matheus Barros-Costa, Eduarda Helena Leandro Nascimento, Iago Filipe Correia-Dantas, Matheus L Oliveira, Deborah Queiroz Freitas

Purpose: This study evaluated the impact of artifacts generated by metal crowns on the detection of proximal caries lesions in teeth at various distances using cone-beam computed tomography (CBCT). Additionally, the diagnostic impacts of tube current and metal artifact reduction (MAR) were investigated.

Materials and methods: Thirty teeth were arranged within 10 phantoms, each containing 1 first premolar, 1 second premolar, and 1 second molar. A sound first molar (for the control group) or a tooth with a metal crown was placed. Of the 60 proximal surfaces evaluated, 15 were sound and 45 exhibited enamel caries. CBCT scans were acquired using an OP300 Maxio unit (Instrumentarium, Tuusula, Finland), while varying the tube current (4, 8, or 12.5 mA) and enabling or disabling MAR. Five observers assessed mesial and distal surfaces using a 5-point scale. Multi-way analysis of variance was employed for data comparison, with P<0.05 indicating statistical significance.

Results: The area under the curve (AUC) varied from 0.40 to 0.60 (sensitivity: 0.28-0.45, specificity: 0.44-0.80). The diagnostic accuracy was not significantly affected by the presence of a metal crown, milliamperage, or MAR (P>0.05). However, the overall AUC and specificity were significantly lower for surfaces near a crown (P<0.05).

Conclusion: CBCT-based caries detection was not influenced by the presence of a metal crown, variations in milliamperage, or MAR activation. However, the diagnostic accuracy was low and was further diminished for surfaces near a crown. Consequently, CBCT is not recommended for the detection of incipient caries lesions.

目的:本研究评估了金属牙冠产生的伪影对使用锥束计算机断层扫描(CBCT)检测不同距离牙齿近端龋病病变的影响。此外,还研究了管电流和金属伪影减少(MAR)对诊断的影响:在 10 个模型中排列了 30 颗牙齿,每个模型包含 1 颗第一前磨牙、1 颗第二前磨牙和 1 颗第二臼齿。模型中放置了一颗完整的第一臼齿(对照组)或一颗带有金属牙冠的牙齿。在接受评估的 60 颗牙齿近端表面中,15 颗牙齿完好,45 颗牙齿出现釉质龋坏。CBCT 扫描使用 OP300 Maxio 设备(Instrumentarium,Tuusula,Finland)采集,同时改变显像管电流(4、8 或 12.5 mA)并启用或禁用 MAR。五名观察者使用 5 点量表对中间和远端表面进行评估。采用多向方差分析进行数据比较,结果如下:曲线下面积(AUC)从 0.40 到 0.60 不等(灵敏度:0.28-0.45,特异性:0.44-0.80)。金属牙冠、毫安培数或 MAR 对诊断准确性没有明显影响(P>0.05)。但是,靠近牙冠的表面的总体 AUC 和特异性明显较低(PC 结论:基于 CBCT 的龋病检测是一种有效的方法:基于 CBCT 的龋病检测不受金属牙冠的存在、毫安培数的变化或 MAR 激活的影响。但是,诊断准确率较低,而且靠近牙冠的表面的诊断准确率进一步降低。因此,不建议用 CBCT 检测初期龋损。
{"title":"Potential impact of metal crowns at varying distances from a carious lesion on its detection on cone-beam computed tomography scans with several protocols.","authors":"Matheus Barros-Costa, Eduarda Helena Leandro Nascimento, Iago Filipe Correia-Dantas, Matheus L Oliveira, Deborah Queiroz Freitas","doi":"10.5624/isd.20230202","DOIUrl":"https://doi.org/10.5624/isd.20230202","url":null,"abstract":"<p><strong>Purpose: </strong>This study evaluated the impact of artifacts generated by metal crowns on the detection of proximal caries lesions in teeth at various distances using cone-beam computed tomography (CBCT). Additionally, the diagnostic impacts of tube current and metal artifact reduction (MAR) were investigated.</p><p><strong>Materials and methods: </strong>Thirty teeth were arranged within 10 phantoms, each containing 1 first premolar, 1 second premolar, and 1 second molar. A sound first molar (for the control group) or a tooth with a metal crown was placed. Of the 60 proximal surfaces evaluated, 15 were sound and 45 exhibited enamel caries. CBCT scans were acquired using an OP300 Maxio unit (Instrumentarium, Tuusula, Finland), while varying the tube current (4, 8, or 12.5 mA) and enabling or disabling MAR. Five observers assessed mesial and distal surfaces using a 5-point scale. Multi-way analysis of variance was employed for data comparison, with <i>P</i><0.05 indicating statistical significance.</p><p><strong>Results: </strong>The area under the curve (AUC) varied from 0.40 to 0.60 (sensitivity: 0.28-0.45, specificity: 0.44-0.80). The diagnostic accuracy was not significantly affected by the presence of a metal crown, milliamperage, or MAR (<i>P</i>>0.05). However, the overall AUC and specificity were significantly lower for surfaces near a crown (<i>P</i><0.05).</p><p><strong>Conclusion: </strong>CBCT-based caries detection was not influenced by the presence of a metal crown, variations in milliamperage, or MAR activation. However, the diagnostic accuracy was low and was further diminished for surfaces near a crown. Consequently, CBCT is not recommended for the detection of incipient caries lesions.</p>","PeriodicalId":51714,"journal":{"name":"Imaging Science in Dentistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10985521/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140873449","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
Pediatric mandibular chronic nonbacterial osteomyelitis: A case report with 12 years of radiologic follow-up. 小儿下颌骨慢性非细菌性骨髓炎:一份病例报告及 12 年的放射学随访。
IF 1.8 Q2 Dentistry Pub Date : 2024-03-01 Epub Date: 2024-02-06 DOI: 10.5624/isd.20230189
Sehyun Choi, Min-Ji Kim, Sang-Hoon Kang, In-Woo Park

Chronic nonbacterial osteomyelitis (CNO) is histologically characterized by nonspecific osteitis. This inflammatory disorder, which lacks an infectious origin, typically presents with chronic pain and swelling at the affected site that can persist for months or even years. However, it is rare for CNO to affect the mandible. A 10-year-old girl presented with a primary complaint of pain in her left mandible. She had no significant medical or dental history. On examination, swelling was visible on the left buccal side, and imaging revealed radiolucent bone deterioration within the left mandible. This case report presents the radiological changes observed over a 12-year follow-up period. Variations in radiopacity, radiolucency, and periosteal reactions were noted periodically. This case highlights the radiological characteristics and findings that are crucial for the diagnosis of CNO, a condition for which no clear diagnostic criteria are currently available.

慢性非细菌性骨髓炎(CNO)的组织学特征是非特异性骨炎。这种炎症性疾病没有传染源,通常表现为受影响部位的慢性疼痛和肿胀,可持续数月甚至数年。然而,CNO很少累及下颌骨。一名 10 岁女孩主诉左下颌骨疼痛。她没有明显的病史或牙科病史。经检查,左侧颊侧可见肿胀,影像学检查显示左侧下颌骨放射性骨质退化。本病例报告介绍了 12 年随访期间观察到的放射学变化。放射亮度、放射亮度和骨膜反应均呈周期性变化。本病例强调了对 CNO 诊断至关重要的放射学特征和发现,目前尚无明确的诊断标准。
{"title":"Pediatric mandibular chronic nonbacterial osteomyelitis: A case report with 12 years of radiologic follow-up.","authors":"Sehyun Choi, Min-Ji Kim, Sang-Hoon Kang, In-Woo Park","doi":"10.5624/isd.20230189","DOIUrl":"https://doi.org/10.5624/isd.20230189","url":null,"abstract":"<p><p>Chronic nonbacterial osteomyelitis (CNO) is histologically characterized by nonspecific osteitis. This inflammatory disorder, which lacks an infectious origin, typically presents with chronic pain and swelling at the affected site that can persist for months or even years. However, it is rare for CNO to affect the mandible. A 10-year-old girl presented with a primary complaint of pain in her left mandible. She had no significant medical or dental history. On examination, swelling was visible on the left buccal side, and imaging revealed radiolucent bone deterioration within the left mandible. This case report presents the radiological changes observed over a 12-year follow-up period. Variations in radiopacity, radiolucency, and periosteal reactions were noted periodically. This case highlights the radiological characteristics and findings that are crucial for the diagnosis of CNO, a condition for which no clear diagnostic criteria are currently available.</p>","PeriodicalId":51714,"journal":{"name":"Imaging Science in Dentistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10985518/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140873394","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
Clinical and radiographic characteristics of pycnodysostosis: A systematic review. 侏儒症的临床和影像学特征:系统综述。
IF 1.8 Q2 Dentistry Pub Date : 2024-03-01 Epub Date: 2024-01-04 DOI: 10.5624/isd.20230191
Amanda Katarinny Goes Gonzaga, Carla Samily de Oliveira Costa, Hannah Gil de Farias Morais, Braz da Fonseca Neto, Leão Pereira Pinto, Wagner Ranier Maciel Dantas, Patricia Teixeira de Oliveira, Daniela Pita de Melo

Purpose: Pycnodysostosis (PYCD), an autosomal recessive syndrome, is characterized by an imbalance in bone remodeling that produces various clinical and radiographic craniofacial manifestations. This review represents a systematic examination of these manifestations, as well as oral features associated with PYCD.

Materials and methods: A systematic review was conducted across 8 databases from February to March 2023. The search strategy focused on studies reporting cases of PYCD that examined the clinical and radiographic craniofacial and oral characteristics associated with this syndrome.

Results: The review included 84 studies, encompassing a total of 179 cases of PYCD. More than half of the patients were female (55.3%), and the mean age was 14.7 years. Parental consanguinity was reported in 51.4% of the cases. The most common craniofacial clinical manifestation was a prominent nose, observed in 57.5% of cases. Radiographically, the most frequently reported craniofacial characteristics included the presence of an obtuse mandibular angle (84.3%) and frontal cranial bosses (82.1%). Clinical and radiographic examinations revealed oral alterations, with micrognathia present in 62.6% of patients and malocclusion in 59.2%. Among dental anomalies, tooth agenesis was the most commonly reported, affecting 15.6% of patients.

Conclusion: Understanding the clinical and radiographic craniofacial features of PYCD is crucial for dental professionals. This knowledge enables these clinicians to devise effective treatment plans and improve patient quality of life.

目的:侏儒症(PYCD)是一种常染色体隐性遗传综合征,以骨重塑失衡为特征,可产生各种临床和影像学颅颌面表现。本综述对这些表现以及与PYCD相关的口腔特征进行了系统研究:从 2023 年 2 月到 3 月,在 8 个数据库中进行了系统性回顾。检索策略主要针对报告PYCD病例的研究,这些研究考察了与该综合征相关的临床和影像学颅面和口腔特征:综述包括 84 项研究,共涉及 179 例PYCD。一半以上的患者为女性(55.3%),平均年龄为 14.7 岁。据报告,51.4%的病例父母为近亲。最常见的颅面部临床表现是鼻子突出,占病例总数的 57.5%。在放射学检查中,最常见的颅面特征包括下颌角钝角(84.3%)和额颅骨突起(82.1%)。临床和放射学检查显示,62.6%的患者存在小颌畸形,59.2%的患者存在错颌畸形。在牙齿畸形中,牙齿缺失是最常见的报告,影响了15.6%的患者:结论:了解PYCD的临床和放射学颅面特征对牙科专业人员至关重要。结论:了解PYCD的临床和放射学颅面特征对牙科专业人员至关重要,这些知识使临床医生能够制定有效的治疗方案,提高患者的生活质量。
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引用次数: 0
Deep learning system for distinguishing between nasopalatine duct cysts and radicular cysts arising in the midline region of the anterior maxilla on panoramic radiographs. 深度学习系统,用于在全景X光片上区分鼻腭管囊肿和上颌骨前中线区域的根状囊肿。
IF 1.8 Q2 Dentistry Pub Date : 2024-03-01 Epub Date: 2023-12-13 DOI: 10.5624/isd.20230169
Yoshitaka Kise, Chiaki Kuwada, Mizuho Mori, Motoki Fukuda, Yoshiko Ariji, Eiichiro Ariji

Purpose: The aims of this study were to create a deep learning model to distinguish between nasopalatine duct cysts (NDCs), radicular cysts, and no-lesions (normal) in the midline region of the anterior maxilla on panoramic radiographs and to compare its performance with that of dental residents.

Materials and methods: One hundred patients with a confirmed diagnosis of NDC (53 men, 47 women; average age, 44.6±16.5 years), 100 with radicular cysts (49 men, 51 women; average age, 47.5±16.4 years), and 100 with normal groups (56 men, 44 women; average age, 34.4±14.6 years) were enrolled in this study. Cases were randomly assigned to the training datasets (80%) and the test dataset (20%). Then, 20% of the training data were randomly assigned as validation data. A learning model was created using a customized DetectNet built in Digits version 5.0 (NVIDIA, Santa Clara, USA). The performance of the deep learning system was assessed and compared with that of two dental residents.

Results: The performance of the deep learning system was superior to that of the dental residents except for the recall of radicular cysts. The areas under the curve (AUCs) for NDCs and radicular cysts in the deep learning system were significantly higher than those of the dental residents. The results for the dental residents revealed a significant difference in AUC between NDCs and normal groups.

Conclusion: This study showed superior performance in detecting NDCs and radicular cysts and in distinguishing between these lesions and normal groups.

目的:本研究旨在创建一个深度学习模型,以区分全景X光片上上颌骨前中线区域的鼻腭管囊肿(NDC)、根状囊肿和无脓肿(正常),并将其性能与牙科住院医师的性能进行比较:100 名确诊为 NDC 的患者(53 名男性,47 名女性;平均年龄(44.6±16.5)岁)、100 名根状囊肿患者(49 名男性,51 名女性;平均年龄(47.5±16.4)岁)和 100 名正常组患者(56 名男性,44 名女性;平均年龄(34.4±14.6)岁)被纳入本研究。病例被随机分配到训练数据集(80%)和测试数据集(20%)中。然后,20% 的训练数据被随机分配为验证数据。使用在 Digits 5.0 版(英伟达公司,美国圣克拉拉)中构建的定制 DetectNet 创建了一个学习模型。对深度学习系统的性能进行了评估,并与两名牙科住院医师的性能进行了比较:结果:深度学习系统的表现优于牙科住院医师,但根状囊肿的回忆除外。深度学习系统对 NDC 和根状囊肿的曲线下面积(AUC)明显高于牙科住院医师。牙科住院医师的结果显示,NDCs 和正常组的 AUC 有显著差异:这项研究表明,深度学习系统在检测 NDC 和根状囊肿以及区分这些病变和正常组方面表现出色。
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引用次数: 0
Utility of intraoral scanner imaging for dental plaque detection. 口内扫描仪成像对牙菌斑检测的实用性。
IF 1.8 Q2 Dentistry Pub Date : 2024-03-01 Epub Date: 2024-01-04 DOI: 10.5624/isd.20230180
Chihiro Yoshiga, Kazuya Doi, Hiroshi Oue, Reiko Kobatake, Maiko Kawagoe, Hanako Umehara, Kazuhiro Tsuga

Purpose: Oral hygiene, maintained through plaque control, helps prevent periodontal disease and dental caries. This study was conducted to examine the accuracy of plaque detection with an intraoral scanner (IOS) compared to images captured with an optical camera.

Materials and methods: To examine the effect of color tone, artificial tooth resin samples were stained red, blue, and green, after which images were acquired with a digital single-lens reflex (DSLR) camera and an IOS device. Stained surface ratios were then determined and compared. Additionally, the deviation rate of the IOS relative to the DSLR camera was computed for each color. In the clinical study, following plaque staining with red disclosing solution, the staining was captured by the DSLR and IOS devices, and the stained area on each image was measured.

Results: The stained surface ratios did not differ significantly between DSLR and IOS images for any color group. Additionally, the deviation rate did not vary significantly across colors. In the clinical test, the stained plaque appeared slightly lighter in color, and the delineation of the stained areas less distinct, on the IOS compared to the DSLR images. However, the stained surface ratio was significantly higher in the IOS than in the DSLR group.

Conclusion: When employing IOS with dental plaque staining, the impact of color was minimal, suggesting that the traditional red stain remains suitable for plaque detection. IOS images appeared relatively blurred and enlarged relative to the true state of the teeth, due to inferior sharpness compared to camera images.

目的:通过控制牙菌斑保持口腔卫生有助于预防牙周病和龋齿。本研究旨在检验口内扫描仪(IOS)与光学相机拍摄的图像相比,牙菌斑检测的准确性:为了研究色调的影响,人工牙齿树脂样本被染成红色、蓝色和绿色,然后用数码单反相机(DSLR)和 IOS 设备采集图像。然后确定染色表面比率并进行比较。此外,还计算了每种颜色的 IOS 相对于数码单反相机的偏差率。在临床研究中,用红色披露液对斑块染色后,用数码单反相机和 IOS 设备捕捉染色,并测量每张图像上的染色面积:结果:在任何颜色组别中,DSLR 和 IOS 图像的染色表面比率均无明显差异。此外,不同颜色的偏差率也无明显差异。在临床测试中,与数码单反相机图像相比,IOS 图像上染色斑块的颜色略浅,染色区域的划分也不明显。然而,IOS 组的染色表面比率明显高于 DSLR 组:结论:使用 IOS 进行牙菌斑染色时,颜色的影响微乎其微,这表明传统的红色染色仍然适用于牙菌斑检测。与照相机图像相比,IOS 图像的清晰度较低,因此相对于牙齿的真实情况而言,IOS 图像显得相对模糊和放大。
{"title":"Utility of intraoral scanner imaging for dental plaque detection.","authors":"Chihiro Yoshiga, Kazuya Doi, Hiroshi Oue, Reiko Kobatake, Maiko Kawagoe, Hanako Umehara, Kazuhiro Tsuga","doi":"10.5624/isd.20230180","DOIUrl":"https://doi.org/10.5624/isd.20230180","url":null,"abstract":"<p><strong>Purpose: </strong>Oral hygiene, maintained through plaque control, helps prevent periodontal disease and dental caries. This study was conducted to examine the accuracy of plaque detection with an intraoral scanner (IOS) compared to images captured with an optical camera.</p><p><strong>Materials and methods: </strong>To examine the effect of color tone, artificial tooth resin samples were stained red, blue, and green, after which images were acquired with a digital single-lens reflex (DSLR) camera and an IOS device. Stained surface ratios were then determined and compared. Additionally, the deviation rate of the IOS relative to the DSLR camera was computed for each color. In the clinical study, following plaque staining with red disclosing solution, the staining was captured by the DSLR and IOS devices, and the stained area on each image was measured.</p><p><strong>Results: </strong>The stained surface ratios did not differ significantly between DSLR and IOS images for any color group. Additionally, the deviation rate did not vary significantly across colors. In the clinical test, the stained plaque appeared slightly lighter in color, and the delineation of the stained areas less distinct, on the IOS compared to the DSLR images. However, the stained surface ratio was significantly higher in the IOS than in the DSLR group.</p><p><strong>Conclusion: </strong>When employing IOS with dental plaque staining, the impact of color was minimal, suggesting that the traditional red stain remains suitable for plaque detection. IOS images appeared relatively blurred and enlarged relative to the true state of the teeth, due to inferior sharpness compared to camera images.</p>","PeriodicalId":51714,"journal":{"name":"Imaging Science in Dentistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10985524/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140861410","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
Deep learning-based automatic segmentation of the mandibular canal on panoramic radiographs: A multi-device study. 基于深度学习的下颌管全景X光片自动分割:多设备研究
IF 1.8 Q2 Dentistry Pub Date : 2024-03-01 Epub Date: 2024-02-22 DOI: 10.5624/isd.20230245
Moe Thu Zar Aung, Sang-Heon Lim, Jiyong Han, Su Yang, Ju-Hee Kang, Jo-Eun Kim, Kyung-Hoe Huh, Won-Jin Yi, Min-Suk Heo, Sam-Sun Lee

Purpose: The objective of this study was to propose a deep-learning model for the detection of the mandibular canal on dental panoramic radiographs.

Materials and methods: A total of 2,100 panoramic radiographs (PANs) were collected from 3 different machines: RAYSCAN Alpha (n=700, PAN A), OP-100 (n=700, PAN B), and CS8100 (n=700, PAN C). Initially, an oral and maxillofacial radiologist coarsely annotated the mandibular canals. For deep learning analysis, convolutional neural networks (CNNs) utilizing U-Net architecture were employed for automated canal segmentation. Seven independent networks were trained using training sets representing all possible combinations of the 3 groups. These networks were then assessed using a hold-out test dataset.

Results: Among the 7 networks evaluated, the network trained with all 3 available groups achieved an average precision of 90.6%, a recall of 87.4%, and a Dice similarity coefficient (DSC) of 88.9%. The 3 networks trained using each of the 3 possible 2-group combinations also demonstrated reliable performance for mandibular canal segmentation, as follows: 1) PAN A and B exhibited a mean DSC of 87.9%, 2) PAN A and C displayed a mean DSC of 87.8%, and 3) PAN B and C demonstrated a mean DSC of 88.4%.

Conclusion: This multi-device study indicated that the examined CNN-based deep learning approach can achieve excellent canal segmentation performance, with a DSC exceeding 88%. Furthermore, the study highlighted the importance of considering the characteristics of panoramic radiographs when developing a robust deep-learning network, rather than depending solely on the size of the dataset.

目的:本研究旨在提出一种深度学习模型,用于检测牙科全景X光片上的下颌管:从 3 台不同的机器上共收集了 2100 张全景照片 (PAN):RAYSCAN Alpha (n=700, PAN A)、OP-100 (n=700, PAN B) 和 CS8100 (n=700, PAN C)。最初,口腔颌面放射科医生对下颌管进行粗略标注。在深度学习分析中,采用 U-Net 架构的卷积神经网络 (CNN) 进行自动下颌管分割。使用代表 3 组所有可能组合的训练集对 7 个独立网络进行了训练。然后使用一个保留测试数据集对这些网络进行评估:结果:在接受评估的 7 个网络中,使用所有 3 个可用组别训练的网络的平均精确度为 90.6%,召回率为 87.4%,骰子相似系数(DSC)为 88.9%。使用 3 种可能的 2 组组合训练的 3 个网络在下颌管分割方面也表现出可靠的性能,具体如下:1) PAN A 和 B 的平均 DSC 为 87.9%;2) PAN A 和 C 的平均 DSC 为 87.8%;3) PAN B 和 C 的平均 DSC 为 88.4%:这项多设备研究表明,所研究的基于 CNN 的深度学习方法可以实现出色的管腔分割性能,DSC 超过 88%。此外,该研究还强调了在开发强大的深度学习网络时考虑全景X光片特征的重要性,而不是仅仅依赖于数据集的大小。
{"title":"Deep learning-based automatic segmentation of the mandibular canal on panoramic radiographs: A multi-device study.","authors":"Moe Thu Zar Aung, Sang-Heon Lim, Jiyong Han, Su Yang, Ju-Hee Kang, Jo-Eun Kim, Kyung-Hoe Huh, Won-Jin Yi, Min-Suk Heo, Sam-Sun Lee","doi":"10.5624/isd.20230245","DOIUrl":"https://doi.org/10.5624/isd.20230245","url":null,"abstract":"<p><strong>Purpose: </strong>The objective of this study was to propose a deep-learning model for the detection of the mandibular canal on dental panoramic radiographs.</p><p><strong>Materials and methods: </strong>A total of 2,100 panoramic radiographs (PANs) were collected from 3 different machines: RAYSCAN Alpha (n=700, PAN A), OP-100 (n=700, PAN B), and CS8100 (n=700, PAN C). Initially, an oral and maxillofacial radiologist coarsely annotated the mandibular canals. For deep learning analysis, convolutional neural networks (CNNs) utilizing U-Net architecture were employed for automated canal segmentation. Seven independent networks were trained using training sets representing all possible combinations of the 3 groups. These networks were then assessed using a hold-out test dataset.</p><p><strong>Results: </strong>Among the 7 networks evaluated, the network trained with all 3 available groups achieved an average precision of 90.6%, a recall of 87.4%, and a Dice similarity coefficient (DSC) of 88.9%. The 3 networks trained using each of the 3 possible 2-group combinations also demonstrated reliable performance for mandibular canal segmentation, as follows: 1) PAN A and B exhibited a mean DSC of 87.9%, 2) PAN A and C displayed a mean DSC of 87.8%, and 3) PAN B and C demonstrated a mean DSC of 88.4%.</p><p><strong>Conclusion: </strong>This multi-device study indicated that the examined CNN-based deep learning approach can achieve excellent canal segmentation performance, with a DSC exceeding 88%. Furthermore, the study highlighted the importance of considering the characteristics of panoramic radiographs when developing a robust deep-learning network, rather than depending solely on the size of the dataset.</p>","PeriodicalId":51714,"journal":{"name":"Imaging Science in Dentistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10985527/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140872836","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
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Imaging Science in Dentistry
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