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PD-L1 immunohistochemical expression considering HPV status in oropharyngeal squamous cell carcinoma. 口咽鳞癌中考虑 HPV 状态的 PD-L1 免疫组化表达。
IF 1.5 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-30 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0095
Raíssa Soares Dos Anjos, Marianne de Vasconcelos Carvalho, Rayanna Thayse Florêncio Costa, Belmiro Cavalcanti do Egito Vasconcelos, Sandra Lúcia Dantas Moraes, Eduardo Piza Pellizzer

This systematic review aims to determine whether the presence of human papillomavirus (HPV) influences the immunohistochemical expression of programmed cell death-1 ligand (PD-L1) in oropharyngeal squamous cell carcinoma (OPSCC). PD-L1 immunohistochemical expression varies in OPSCC, and the presence of HPV is a plausible explanation for this variability. Comprehending these findings is crucial, as high PD-L1 expression in the tumor microenvironment of OPSCC can help identify patient subgroups that could be suitable for immunotherapy. Therefore, a systematic review was conducted following PRISMA guidelines (CRD42023437800). An electronic literature search was performed without time or language restrictions. The search included PubMed/MEDLINE, Embase, Scopus, Web of Science, https://clinictrials.gov, and relevant journals. A meta-analysis was performed using RStudio. Fourteen studies involving 1,629 participants were included. The sample consisted predominantly of males (81.26%) with a mean age of 58.3 years. Concerning clinical and pathological characteristics, the most frequently described anatomical location was the tonsils (68.54%), and most participants were either current or former smokers (78%) and alcohol users (79%). Advanced TNM IV was the most common stage. Regarding histopathological characteristics, HPV 16 was the only type mentioned, and half of the cases were detected through immunohistochemistry. The SP142 clone (35.7%) and the pattern of membrane immunostaining in tumor cells (71%) were the most commonly employed methods. The most prevalent findings were positive expression of PD-L1 (64.28%) and negative HPV status (57.14%). The association between PD-L1 positivity and HPV positivity (78.57%) was confirmed by meta-analysis. The conclusion was that HPV-positive status has an impact on immunohistochemical expression of PD-L1 in OPSCC.

本系统综述旨在确定人乳头瘤病毒(HPV)是否会影响口咽鳞状细胞癌(OPSCC)中程序性细胞死亡-1配体(PD-L1)的免疫组化表达。PD-L1在口咽鳞状细胞癌中的免疫组化表达存在差异,而HPV的存在是这种差异的一个合理解释。理解这些发现至关重要,因为 OPSCC 肿瘤微环境中 PD-L1 的高表达有助于识别适合免疫疗法的患者亚群。因此,我们按照PRISMA指南(CRD42023437800)进行了系统性综述。电子文献检索不受时间和语言限制。搜索范围包括 PubMed/MEDLINE、Embase、Scopus、Web of Science、https://clinictrials.gov 以及相关期刊。使用 RStudio 进行了荟萃分析。共纳入 14 项研究,涉及 1629 名参与者。样本主要为男性(81.26%),平均年龄为 58.3 岁。在临床和病理特征方面,最常描述的解剖位置是扁桃体(68.54%),大多数参与者目前或曾经是吸烟者(78%)和饮酒者(79%)。TNM IV 晚期是最常见的分期。在组织病理学特征方面,HPV 16 是唯一被提及的类型,半数病例是通过免疫组化检测到的。SP142克隆(35.7%)和肿瘤细胞膜免疫染色模式(71%)是最常用的方法。最常见的结果是 PD-L1 阳性表达(64.28%)和 HPV 阴性状态(57.14%)。荟萃分析证实了 PD-L1 阳性与 HPV 阳性(78.57%)之间的关联。结论是HPV阳性状态对OPSCC中PD-L1的免疫组化表达有影响。
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引用次数: 0
A YOLO-V5 approach for the evaluation of normal fillings and overhanging fillings: an artificial intelligence study. 评估正常填充物和悬垂填充物的 YOLO-V5 方法:一项人工智能研究。
IF 1.5 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-30 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0098
Nilgün Akgül, Cemile Yilmaz, Elif Bilgir, Özer Çelik, Oğuzhan Baydar, İbrahim Şevki Bayrakdar

Dental fillings, frequently used in dentistry to address various dental tissue issues, may pose problems when not aligned with the anatomical contours and physiology of dental and periodontal tissues. Our study aims to detect the prevalence and distribution of normal and overhanging filling restorations using a deep CNN architecture trained through supervised learning, on panoramic radiography images. A total of 10480 fillings and 2491 overhanging fillings were labeled using CranioCatch software from 2473 and 1850 images, respectively. After the data obtaining phase, validation (80%), training 10%), and test-groups (10%) were formed from images for both labelling. The YOLOv5x architecture was used to develop the AI model. The model's performance was assessed through a confusion matrix and sensitivity, precision, and F1 score values of the model were calculated. For filling, sensitivity is 0.95, precision is 0.97, and F1 score is 0.96; for overhanging were determined to be 0.86, 0.89, and 0.87, respectively. The results demonstrate the capacity of the YOLOv5 algorithm to segment dental radiographs efficiently and accurately and demonstrate proficiency in detecting and distinguishing between normal and overhanging filling restorations.

牙科中经常使用补牙来解决各种牙体组织问题,但如果补牙与牙体和牙周组织的解剖轮廓和生理结构不一致,就会产生问题。我们的研究旨在使用通过监督学习训练的深度 CNN 架构,在全景放射影像上检测正常和悬垂补牙修复体的普遍性和分布情况。使用 CranioCatch 软件分别从 2473 张和 1850 张图像中标记了 10480 个充填物和 2491 个悬垂充填物。数据获取阶段结束后,根据两组标记图像分别组成验证组(80%)、训练组(10%)和测试组(10%)。人工智能模型采用 YOLOv5x 架构开发。通过混淆矩阵评估了模型的性能,并计算了模型的灵敏度、精确度和 F1 分数值。对于填充,灵敏度为 0.95,精确度为 0.97,F1 分数为 0.96;对于悬挂,灵敏度、精确度和 F1 分数分别为 0.86、0.89 和 0.87。结果表明,YOLOv5 算法能够高效、准确地分割牙科 X 光片,并能熟练检测和区分正常和悬雍垂充填修复体。
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引用次数: 0
Influence of the digital file format on radiographic diagnostic in dentistry: a scoping review. 数字文件格式对牙科放射诊断的影响:范围综述。
IF 1.5 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-30 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0100
Murilo Miranda-Viana, Matheus Sampaio-Oliveira, Rocharles Cavalcante Fontenele, Deborah Queiroz Freitas, Francisco Haiter-Neto

Given today's higher demand for online transmission of radiographic images, clinicians and regulatory agencies should be given the evidence they need to guide them in choosing the best image file format to be adopted. To this end, the present scoping review aims to explore, map, and evaluate the literature, with the object of reporting the influence of image file formats on dental diagnostic tasks by assessing intraoral radiographic images. This scoping review complies with PRISMA-ScR. It was customized to assess the risk of bias of the included studies, and was registered on the Open Science Framework platform. The data extraction protocol was developed based on the PCC acronym. An electronic search was conducted in six databases (Pubmed, Web of Science, Scopus, Embase, Lilacs, Cochrane) in December 2023. Original articles were screened, having observational, diagnostic accuracy, and consisting of in vivo or ex vivo laboratory studies investigating the influence of file formats on different diagnostic tasks in dentistry. Eighteen studies, published between the years 1996 and 2022, were included. The following data were extracted from the selected articles: article title, authors' citation, publication date, country, diagnostic task, image file formats tested, compression level, and main conclusion. The most widely investigated diagnostic task was caries lesions (n = 10), led by root resorptions (n = 3), root fractures (n = 2), periapical lesions (n = 2), and periodontal disease (n = 1). The most commonly used radiographic techniques were periapical (n = 12) and bitewing (n = 6). The most frequently investigated image file formats were JPEG (all studies) and TIFF (n = 10 studies). BMP, PNG, and JPEG2000 were also included in 7, 3 and 3 studies, respectively. No studies included the DICOM file format. In regard to the subjective assessment of the several dental diagnostic tasks, the studies mostly showed that the influence of the file formats was not significant (n = 10/55.5%). As for the quality assessment of the included papers, more than 70% of the studies featured a low risk of bias. Current evidence on image file formats and dental radiographic diagnosis is reliable. Any image file format can be used without impairing diagnostic accuracy.

鉴于当今对放射影像在线传输的需求越来越高,临床医生和监管机构应该获得所需的证据,以指导他们选择最佳的影像文件格式。为此,本范围界定综述旨在探索、绘制和评估相关文献,通过评估口内放射影像,报告影像文件格式对牙科诊断任务的影响。本范围界定综述符合 PRISMA-ScR。它是为评估纳入研究的偏倚风险而定制的,并在开放科学框架平台上进行了注册。数据提取协议是根据 PCC 首字母缩写词制定的。2023 年 12 月,在六个数据库(Pubmed、Web of Science、Scopus、Embase、Lilacs、Cochrane)中进行了电子检索。筛选了具有观察性、诊断准确性的原创文章,这些文章由体内或体外实验室研究组成,调查了文件格式对牙科不同诊断任务的影响。其中包括 1996 年至 2022 年间发表的 18 项研究。从所选文章中提取了以下数据:文章标题、作者引文、出版日期、国家、诊断任务、测试的图像文件格式、压缩水平和主要结论。调查最多的诊断任务是龋病病变(10 例),其次是牙根缺损(3 例)、牙根折断(2 例)、根尖周病变(2 例)和牙周病(1 例)。最常用的放射成像技术是根尖周(12 例)和咬翼(6 例)。最常用的图像文件格式是 JPEG(所有研究)和 TIFF(10 项研究)。BMP、PNG 和 JPEG2000 也分别有 7 项、3 项和 3 项研究采用。没有研究采用 DICOM 文件格式。关于几项牙科诊断任务的主观评估,大多数研究表明文件格式的影响并不显著(n = 10/55.5%)。在对收录论文的质量评估方面,70%以上的研究偏倚风险较低。目前关于图像文件格式和牙科放射诊断的证据是可靠的。使用任何图像文件格式都不会影响诊断的准确性。
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引用次数: 0
Cross-cultural adaptation of the eHealth Literacy Scale for Brazilian adolescents. 针对巴西青少年的电子健康素养量表的跨文化改编。
IF 1.5 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-30 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0094
Mariane Carolina Faria Barbosa, Ana Luiza Peres Baldiotti, Maria Luisa Leandro de Souza Dias, Ana Flávia Granville-Garcia, Saul Martins Paiva, Fernanda de Morais Ferreira

The aim of this study was to undertake a cross-cultural adaptation of the eHealth Literacy Scale (eHEALS) instrument to measure digital health literacy of Brazilian adolescents. eHEALS is a scale consisting of 8 items that measure self-perception related to the consumption of electronic health information. This is a methodological study of cross-cultural adaptation, conducted out from February 2022 to June 2022. The following steps were carried out: a) assessment and adequacy of cultural equivalence by a committee of experts; b) back-translation; c) synthesis of back-translations; d) cognitive testing with 42 Brazilian adolescents, using cognitive interviews with probing questions. All items that were difficult to understand were adapted to the (language) context of Brazilian adolescents. Cronbach's alpha coefficient for eHEALS-BrA was 0.81 and, if one of the items were excluded from the instrument, it ranged from 0.75-0.81. This version of the eHEALS proved to be culturally well-adapted to the context of Brazilian adolescents, and has the potential to measure digital health literacy in this population after having its validation confirmed through psychometric analyses.

本研究旨在对电子健康素养量表(eHEALS)进行跨文化改编,以测量巴西青少年的数字健康素养。这是一项跨文化适应性方法研究,于 2022 年 2 月至 2022 年 6 月进行。研究采取了以下步骤:a) 由专家委员会进行文化等效性评估和适当性评估;b) 背译;c) 背译综合;d) 对 42 名巴西青少年进行认知测试,使用带有探究性问题的认知访谈。所有难以理解的项目都根据巴西青少年的(语言)环境进行了调整。eHEALS-BrA 的 Cronbach's alpha 系数为 0.81,如果将其中一个项目从工具中剔除,Cronbach's alpha 系数在 0.75-0.81 之间。事实证明,这一版本的 eHEALS 在文化上很好地适应了巴西青少年的情况,在通过心理测量分析确认其有效性后,它有潜力测量这一人群的数字健康素养。
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引用次数: 0
A novel low shrinkage dimethacrylate monomer as an alternative to BisGMA for adhesive and resin-based composite applications. 一种新型低收缩二甲基丙烯酸酯单体,可替代 BisGMA 用于粘合剂和树脂基复合材料应用。
IF 1.5 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-30 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0097
Fernanda Sandes de Lucena, Matthew Logan, Steven Lewis, Neil Deatherage, Adilson Yoshio Furuse, Carmem Silvia Pfeifer

The aim of this study was to develop a mixture of dimethacrylate isomers (PG6EMA) as a potential monomer for dental adhesives and composites. PG6EMA was synthesized de novo and characterized in the presence of ethanol (3%, 6% or 9%). BisGMA/TEGDMA (BTEG, 50/50 wt.%) was used as the resin control. Composites were formulated with 60 wt.% of either PG6EMA or BisGMA (40 wt.% TEGDMA and 70 wt.% filler). DMPA (0.2 wt.%) and DPI-PF6 (0.4 wt.%) were added as photoinitiators, irradiated with a mercury arc lamp (320-500 nm, 500 mW/cm2; Acticure). All materials were tested for polymerization kinetics (near-infrared), viscosity (η) and storage modulus (G', oscillatory rheometry). The composites were further characterized for water sorption/solubility, wet/dry flexural strength/modulus and polymerization stress. Data were analyzed with one-way ANOVA/Tukey's test (α = 0.05). The PG6EMA resins showed lower rates of polymerization compared with BTEG (p = 0.001) but high degrees of conversion (p = 0.002). Solvent concentration did not affect RPMAX but the 6% and 9% mixtures showed higher final DC, likely due to reduced viscosity. PG6EMA had much higher viscosity than BTEG (p <0.001) and lower G' (p = 0.003). Composites modified with PG6EMA have slower polymerization rates (p = 0.001) but higher final DC (p = 0.04) than the control. PG6EMA/TEGDMA showed lower dry/wet flexural strength and comparable dry modulus. The PG6EMA/TEGDMA composite showed a 18.4% polymerization stress reduction compared to the BTEG composite. Both base monomers had similar WS/SL and G'. Within its limitations, this study demonstrated that the newly synthesized PG6EMA was a viable alternative to BisGMA in dental composites.

本研究旨在开发一种二甲基丙烯酸酯异构体混合物(PG6EMA),作为牙科粘合剂和复合材料的潜在单体。PG6EMA 是在乙醇(3%、6% 或 9%)存在下从头合成的,并对其进行了表征。双GMA/TEGDMA(BTEG,50/50 wt.%)用作树脂对照。复合材料由 60 wt.% 的 PG6EMA 或 BisGMA(40 wt.% 的 TEGDMA 和 70 wt.% 的填料)配制而成。添加 DMPA(0.2 wt.%)和 DPI-PF6(0.4 wt.%)作为光引发剂,用汞弧灯(320-500 纳米,500 mW/cm2;Acticure)照射。对所有材料进行了聚合动力学(近红外)、粘度(η)和储存模量(G',振荡流变仪)测试。对复合材料的吸水性/溶解性、干/湿挠曲强度/模量和聚合应力进行了进一步表征。数据采用单因素方差分析/Tukey 检验(α = 0.05)进行分析。与 BTEG 相比,PG6EMA 树脂的聚合速率较低(p = 0.001),但转化率较高(p = 0.002)。溶剂浓度对 RPMAX 没有影响,但 6% 和 9% 的混合物显示出更高的最终 DC,这可能是由于粘度降低所致。PG6EMA 的粘度比 BTEG 高得多(p = 0.002)。
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引用次数: 0
Prevalence of pulp canal obliteration after traumatic dental injuries: a systematic review and meta-analysis. 牙齿外伤后牙髓腔阻塞的发生率:系统回顾和荟萃分析。
IF 1.5 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-30 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0092
Mariana Gouvêa Latini Abreu, Thaís de Oliveira Fernandes, Leonardo Santos Antunes, Lívia Azeredo Alves Antunes, Lucianne Cople Maia de Faria

This systematic review aimed to answer the following question: What is the estimated prevalence of pulp canal obliteration in subtypes of traumatic dental injury (TDI) in deciduous and permanent teeth? The searches were conducted in PubMed, Embase, Scopus, Web of Science, LILACS, Grey Literature, and Google Scholar, and complemented by a manual search, until April 16th, 2023. Observational studies were selected based on population, exposure, and outcome (PEO) (P, deciduous or permanent teeth; E, TDI; O, pulp canal obliteration). Two reviewers (kappa 0.90) applied the eligibility criteria, extracted qualitative data, and assessed the methodological quality using the Newcastle-Ottawa tool. A meta-analysis was performed using MedCalc 17.2. Thirty-four articles were selected after screening. The methodological quality was moderate to high. The estimated prevalence of pulp canal obliteration was 27.6% (95%CI: 18.7-37.7) and 21.9% (95%CI:16.0-28.4), for permanent and deciduous teeth, respectively. Considering the TDI subtypes, the prevalence of pulp canal obliteration was higher in root fractures of the permanent teeth (78.6 %, 95%CI: 62.8-90.9) and lateral luxation injuries in deciduous teeth (29.4%, 95%CI:19.1-41.0). Our review of 34 articles of moderate and high methodological quality found that the prevalence of pulpal canal obliteration ranges from 21.9% to 27.6%. Pulp canal obliteration was most frequently detected following lateral luxation injuries of the deciduous teeth and root fractures of the permanent teeth (PROSPERO CRD42020179438).

本系统综述旨在回答以下问题:牙髓管阻塞在乳牙和恒牙外伤(TDI)亚型中的估计发生率是多少?检索在 PubMed、Embase、Scopus、Web of Science、LILACS、Grey Literature 和 Google Scholar 中进行,并辅以人工检索,直至 2023 年 4 月 16 日。观察性研究的选择基于人群、暴露和结果(PEO)(P,乳牙或恒牙;E,TDI;O,牙髓腔阻塞)。两名审稿人(kappa 0.90)采用了资格标准,提取了定性数据,并使用纽卡斯尔-渥太华工具评估了方法学质量。使用 MedCalc 17.2 进行了荟萃分析。经过筛选,共有 34 篇文章入选。方法学质量为中高。恒牙和乳牙牙髓管阻塞的估计患病率分别为 27.6%(95%CI:18.7-37.7)和 21.9%(95%CI:16.0-28.4)。考虑到 TDI 的亚型,牙髓管阻塞在恒牙根折(78.6%,95%CI:62.8-90.9)和乳牙侧向塌陷损伤(29.4%,95%CI:19.1-41.0)中的发生率较高。我们对 34 篇中度和高度方法学质量的文章进行了回顾,发现牙髓管阻塞的发生率从 21.9% 到 27.6% 不等。牙髓管阻塞最常在乳牙侧向塌陷损伤和恒牙牙根骨折后发现(PROSPERO CRD42020179438)。
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引用次数: 0
Discrimination due to sexual orientation and oral health-related quality of life among adolescents. 青少年因性取向而受到的歧视与口腔健康相关的生活质量。
IF 1.5 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-13 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0085
Bruno Emmanuelli, Jessica Klöckner Knorst, Orlando Luiz do Amaral-Júnior, Maria Laura Braccini Fagundes, Jessye Melgarejo do Amaral Giordani, Thiago Machado Ardenghi

To evaluate the association between discrimination based on sexual orientation and oral health-related quality of life (OHRQoL) in adolescents. This was a cross-sectional study nested in a cohort performed in southern Brazil. The baseline assessment was carried out in 2010 with a sample of preschoolers (1 to 5 years). Subsequently, these individuals were reassessed, and for the present study, only the data from the final follow-up in 2020 were considered. OHRQoL was assessed by the short version of the Child Perceptions Questionnaire 11-14 (CPQ11-14). The discrimination due to sexual orientation was measured using item 10 of the Olweus Bully/Victim Questionnaire. Sociodemographic (sex, age, skin color, maternal education, household income) psychosocial (sense of coherence), and clinical variables (untreated dental caries) were also evaluated. Multilevel Poisson regression analysis was performed to verify the associations. Results are present as rate ratio (RR) and 95% confidence interval (95% CI). A total of 429 adolescents were evaluated - about 67.1% of those assessed at baseline. The prevalence of discrimination due to sexual orientation was 3.3%. Adolescents who reported suffering episodes of discrimination due to sexual orientation presented overall CPQ11-14 scores 16% higher (RR 1.16, 95%CI 1.01-1.36) than their counterparts. Adolescents who reported suffering episodes of discrimination due to sexual orientation presented poorer OHRQoL.

目的:评估基于性取向的歧视与青少年口腔健康相关生活质量(OHRQoL)之间的关联。这是一项横断面研究,嵌套于在巴西南部进行的一项队列研究。基线评估于 2010 年在学龄前儿童(1 至 5 岁)中进行。随后,对这些儿童进行了重新评估,本研究只考虑了2020年最终随访的数据。OHRQoL通过简版儿童认知问卷11-14(CPQ11-14)进行评估。性取向歧视通过奥尔维斯欺凌/受害者问卷第 10 项进行测量。此外,还评估了社会人口学变量(性别、年龄、肤色、母亲教育程度、家庭收入)、社会心理变量(协调感)和临床变量(未治疗的龋齿)。为验证相关性,进行了多层次泊松回归分析。结果以比率比(RR)和 95% 置信区间(95% CI)表示。共有 429 名青少年接受了评估,约占基线评估人数的 67.1%。因性取向而受到歧视的比例为 3.3%。报告因性取向而遭受歧视的青少年的 CPQ11-14 总分比同龄人高出 16%(RR 1.16,95%CI 1.01-1.36)。报告因性取向而遭受歧视的青少年的 OHRQoL 较差。
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引用次数: 0
Factors associated with dental students' mental health during the COVID-19 pandemic: a longitudinal study. COVID-19大流行期间与牙科学生心理健康相关的因素:一项纵向研究。
IF 1.5 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-13 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0090
Andréa Neiva da Silva, Mario Vianna Vettore

The aim of the present study was to examine the relationships between gender, sense of coherence (SOC), social support, perception of academic environment and mental health of dental students during the coronavirus disease 2019 (COVID-19) pandemic. A longitudinal study involving 65 undergraduates enrolled from the first to sixth semesters in the bachelor dental course of Universidade Federal Fluminense, Brazil, was conducted. Baseline data (2018) included age, gender, SOC, social support, stress control and perception of education environment. Depression, anxiety and stress were assessed at baseline (response rate: 93%) and two-year follow-up (2020; response rate: 37%). Structural Equation Modelling was used to test the relationships between independent variables and depression, anxiety and stress during COVID-19 pandemic. Lower social support (β = -0.15), lower stress control (β = -0.20) and lower SOC (β = -0.39) were directly linked to higher depression (β = 0.22). Female gender (β = 0.22), worse perception of educational environment (β = -0.24) and lower SOC (β = -0.57) directly predicted higher anxiety. Female gender (β = 0.18), lower stress control (β = -0.21), and lower SOC (β = -0.46) directly predicted higher stress. The link between gender and both depression and stress, was mediated by stress control. Social support was indirectly linked to depression and stress via SOC. Perception of educational environment mediated the link between SOC and anxiety. Mental health of dental students during COVID-19 pandemic was influenced by demographic characteristics, perception of educational environment, social support and SOC through both direct and indirect pathways.

本研究旨在探讨2019年冠状病毒病(COVID-19)大流行期间牙科学生的性别、一致性感(SOC)、社会支持、学术环境感知和心理健康之间的关系。这项纵向研究涉及巴西弗卢米嫩塞联邦大学(Universidade Federal Fluminense)第一至第六学期入学的 65 名牙科本科生。基线数据(2018 年)包括年龄、性别、SOC、社会支持、压力控制和对教育环境的感知。在基线(回复率:93%)和两年随访(2020 年;回复率:37%)时对抑郁、焦虑和压力进行了评估。结构方程模型用于检验 COVID-19 大流行期间自变量与抑郁、焦虑和压力之间的关系。较低的社会支持(β = -0.15)、较低的压力控制(β = -0.20)和较低的 SOC(β = -0.39)与较高的抑郁(β = 0.22)直接相关。女性性别(β = 0.22)、教育环境感知较差(β = -0.24)和 SOC 较低(β = -0.57)直接预示着焦虑程度较高。女性性别(β = 0.18)、较低的压力控制(β = -0.21)和较低的 SOC(β = -0.46)直接预示着较高的压力。性别与抑郁和压力之间的联系是由压力控制中介的。社会支持通过 SOC 与抑郁和压力间接相关。对教育环境的感知是 SOC 与焦虑之间联系的中介。在 COVID-19 大流行期间,牙科学生的心理健康受到人口特征、教育环境感知、社会支持和 SOC 的直接和间接影响。
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引用次数: 0
CBCT assessment of mandibular molar furcation following root canal retreatment using engine-driven instruments. 使用引擎驱动器械进行根管再治疗后下颌磨牙毛囊的 CBCT 评估。
IF 1.5 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-13 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0087
Paulo Otávio Carmo Souza, Mike Reis Bueno, Brunno Santos de Freitas Silva, Luiz Eduardo Gregoris, Nádia do Lago Costa, Carlos Estrela

This study employed e-Vol DXS cone beam computed tomography (CBCT) software to assess dentin remnants in the furcation area of mesial canals in mandibular molars during root canal retreatment (RCR). Four groups (Reciproc®, ProTaper Next®, Race Evo®, Protaper Gold®) were subjected to RCR, and CBCT images were captured before (T1) and after (T2) treatment. Measurements of remaining dentin thickness at 1 mm and 3 mm below the furcation were scrutinized. Results revealed no significant differences in mean thicknesses of mesiobuccal (MB) and mesiolingual (ML) canals at 1 mm and 3 mm from the furcation pre-treatment (T1). Post-treatment (T2) showed analogous findings, with no significant differences in mean thicknesses. However, disparities were found between MB and ML canals at both distances, both before and after retreatment. In essence, the evaluated instruments exhibited safety in RCR, implying that they are appropriate for use in critical areas of mandibular molars without inducing excessive wear. This study underscores the reliability of these instruments in navigating danger zones during RCR, and contributes valuable insights for dental practitioners who handle complex root canal scenarios in mandibular molars.

本研究采用 e-Vol DXS 锥形束计算机断层扫描(CBCT)软件来评估下颌磨牙根管再治疗(RCR)期间中轴管沟区的牙本质残留。对四组(Reciproc®、ProTaper Next®、Race Evo®、Protaper Gold®)进行了根管再治疗,并在治疗前(T1)和治疗后(T2)采集了 CBCT 图像。对毛面下 1 毫米和 3 毫米处的剩余牙本质厚度进行了仔细测量。结果显示,治疗前(T1)距龈沟 1 毫米和 3 毫米处的中颊面(MB)和中舌面(ML)牙槽平均厚度无明显差异。治疗后(T2)的结果类似,平均厚度无显著差异。不过,在再治疗前后,MB 和 ML 冠状沟在两个距离上都存在差异。总之,所评估的器械在 RCR 中表现出了安全性,这意味着它们适用于下颌磨牙的关键区域,不会造成过度磨损。这项研究强调了这些器械在 RCR 过程中穿越危险区域的可靠性,并为处理下颌磨牙复杂根管情况的牙科医生提供了有价值的见解。
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引用次数: 0
Impact of L-PRF on pain and healing outcomes in lower third molar surgery: a randomized split-mouth trial. L-PRF 对下第三磨牙手术疼痛和愈合效果的影响:随机分口试验。
IF 1.5 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-13 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0089
Raissa Pinheiro Moraes, Fábio Wildson Gurgel Costa, Paulo Goberlânio de Barros Silva, Francisco Samuel Rodrigues Carvalho, Jéssica Emanuella Rocha Moura Paz, Gabriel Carvalho Matos, Marcela Lima Gurgel, Edson Luiz Cetira Filho, Eduardo Costa Studart Soares

This study explored the effects of L-PRF on pain, soft tissue healing, periodontal condition, and post-extraction bone repair of mandibular third molars (3Ms). A randomized, prospective, triple-blind, split-mouth clinical trial was conducted with 34 volunteers. Eligible patients were randomly allocated into two treatments: G1 (without L-PRF), G2 (alveoli filled with L-PRF), in which the removal of bilateral 3Ms was performed at the same surgical time. Outcomes were assessed according to a visual analogue scale (pain), soft tissue scoring system (wound healing), periodontal probing of mandibular second molar. Bone repair was determined by volumetric analysis (ITK-SNAP software) and fractal analysis (ImageJ software). An intention-to-treat approach to Statistical analysis was used. L-PRF reduced pain in the 7-day postoperative follow-up (p = 0.019) and not only improved soft tissue healing after 1 month of follow-up (p = 0.021), but also probing depth (distal face) in 3 months postoperatively (p = 0.011). Significant alveolar reduction occurred in 3 months after surgery in both treatments (p < 0.05), however, this was more significant in G1 (p = 0.016). The fractal dimension showed no statistical differences. L-PRF improved postoperative clinical parameters of pain, soft tissue healing, and periodontal condition, suggesting that it has a beneficial effect on preserving the alveolar ridge and accelerating the initial repair process.

本研究探讨了 L-PRF 对下颌第三磨牙(3Ms)疼痛、软组织愈合、牙周状况和拔牙后骨修复的影响。研究人员对 34 名志愿者进行了随机、前瞻性、三盲、分口临床试验。符合条件的患者被随机分配到两种治疗方法中:G1(不使用 L-PRF)和 G2(用 L-PRF 填充牙槽骨),其中双侧 3Ms 的切除在同一手术时间进行。疗效根据视觉模拟量表(疼痛)、软组织评分系统(伤口愈合)和下颌第二磨牙牙周探诊进行评估。骨修复情况通过体积分析(ITK-SNAP 软件)和分形分析(ImageJ 软件)确定。统计分析采用意向治疗法。L-PRF 降低了术后 7 天随访的疼痛(p = 0.019),不仅改善了术后 1 个月的软组织愈合(p = 0.021),还改善了术后 3 个月的探诊深度(远端面)(p = 0.011)。两种治疗方法在术后 3 个月都出现了明显的牙槽骨缩小(p < 0.05),但 G1 更为明显(p = 0.016)。骨折维度没有统计学差异。L-PRF 改善了术后疼痛、软组织愈合和牙周状况等临床参数,这表明它对保护牙槽嵴和加速初始修复过程具有有利影响。
{"title":"Impact of L-PRF on pain and healing outcomes in lower third molar surgery: a randomized split-mouth trial.","authors":"Raissa Pinheiro Moraes, Fábio Wildson Gurgel Costa, Paulo Goberlânio de Barros Silva, Francisco Samuel Rodrigues Carvalho, Jéssica Emanuella Rocha Moura Paz, Gabriel Carvalho Matos, Marcela Lima Gurgel, Edson Luiz Cetira Filho, Eduardo Costa Studart Soares","doi":"10.1590/1807-3107bor-2024.vol38.0089","DOIUrl":"10.1590/1807-3107bor-2024.vol38.0089","url":null,"abstract":"<p><p>This study explored the effects of L-PRF on pain, soft tissue healing, periodontal condition, and post-extraction bone repair of mandibular third molars (3Ms). A randomized, prospective, triple-blind, split-mouth clinical trial was conducted with 34 volunteers. Eligible patients were randomly allocated into two treatments: G1 (without L-PRF), G2 (alveoli filled with L-PRF), in which the removal of bilateral 3Ms was performed at the same surgical time. Outcomes were assessed according to a visual analogue scale (pain), soft tissue scoring system (wound healing), periodontal probing of mandibular second molar. Bone repair was determined by volumetric analysis (ITK-SNAP software) and fractal analysis (ImageJ software). An intention-to-treat approach to Statistical analysis was used. L-PRF reduced pain in the 7-day postoperative follow-up (p = 0.019) and not only improved soft tissue healing after 1 month of follow-up (p = 0.021), but also probing depth (distal face) in 3 months postoperatively (p = 0.011). Significant alveolar reduction occurred in 3 months after surgery in both treatments (p < 0.05), however, this was more significant in G1 (p = 0.016). The fractal dimension showed no statistical differences. L-PRF improved postoperative clinical parameters of pain, soft tissue healing, and periodontal condition, suggesting that it has a beneficial effect on preserving the alveolar ridge and accelerating the initial repair process.</p>","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"38 ","pages":"e089"},"PeriodicalIF":1.5,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11404852/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142280414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","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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Brazilian oral research
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