BMC Oral Health最新文献

{"title":"Application of Mask R-CNN for automatic recognition of teeth and caries in cone-beam computerized tomography.","authors":"Yujie Ma, Maged Ali Al-Aroomi, Yutian Zheng, Wenjie Ren, Peixuan Liu, Qing Wu, Ye Liang, Canhua Jiang","doi":"10.1186/s12903-025-06293-8","DOIUrl":"10.1186/s12903-025-06293-8","url":null,"abstract":"<p><strong>Objectives: </strong>Deep convolutional neural networks (CNNs) are advancing rapidly in medical research, demonstrating promising results in diagnosis and prediction within radiology and pathology. This study evaluates the efficacy of deep learning algorithms for detecting and diagnosing dental caries using cone-beam computed tomography (CBCT) with the Mask R-CNN architecture while comparing various hyperparameters to enhance detection.</p><p><strong>Materials and methods: </strong>A total of 2,128 CBCT images were divided into training and validation and test datasets in a 7:1:1 ratio. For the verification of tooth recognition, the data from the validation set were randomly selected for analysis. Three groups of Mask R-CNN networks were compared: A scratch-trained baseline using randomly initialized weights (R group); A transfer learning approach with models pre-trained on COCO for object detection (C group); A variant pre-trained on ImageNetfor for object detection (I group). All configurations maintained identical hyperparameter settings to ensure fair comparison. The deep learning model used ResNet-50 as the backbone network and was trained to 300epoch respectively. We assessed training loss, detection and training times, diagnostic accuracy, specificity, positive and negative predictive values, and coverage precision to compare performance across the groups.</p><p><strong>Results: </strong>Transfer learning significantly reduced training times compared to non-transfer learning approach (p < 0.05). The average detection time for group R was 0.269 ± 0.176 s, whereas groups I (0.323 ± 0.196 s) and C (0.346 ± 0.195 s) exhibited significantly longer detection times (p < 0.05). C-group, trained for 200 epochs, achieved a mean average precision (mAP) of 81.095, outperforming all other groups. The mAP for caries recognition in group R, trained for 300 epochs, was 53.328, with detection times under 0.5 s. Overall, C-group demonstrated significantly higher average precision across all epochs (100, 200, and 300) (p < 0.05).</p><p><strong>Conclusion: </strong>Neural networks pre-trained with COCO transfer learning exhibit superior annotation accuracy compared to those pre-trained with ImageNet. This suggests that COCO's diverse and richly annotated images offer more relevant features for detecting dental structures and carious lesions. Furthermore, employing ResNet-50 as the backbone architecture enhances the detection of teeth and carious regions, achieving significant improvements with just 200 training epochs, potentially increasing the efficiency of clinical image interpretation.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"927"},"PeriodicalIF":2.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12143100/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The association of lead and cadmium exposure with periodontitis: a systematic review and meta-analysis.","authors":"Saiyan Yang, Jun Li, Yousheng Wu","doi":"10.1186/s12903-025-06195-9","DOIUrl":"10.1186/s12903-025-06195-9","url":null,"abstract":"<p><strong>Objective: </strong>Periodontitis, a microbiome-driven chronic inflammatory disease that destroys the supporting structures of the teeth, is influenced by various environmental factors, including exposure to heavy metals such as lead and cadmium. This systematic review and meta-analysis aimed to evaluate the association between exposure to lead and cadmium and periodontitis.</p><p><strong>Methods: </strong>A comprehensive literature search was conducted in PubMed, Web of Science, Scopus, and Embase up to February 1, 2025, following PRISMA guidelines. Observational studies examining the association between lead and/or cadmium exposure and periodontitis were included. Required clinical data were extracted, and study quality was assessed using the Newcastle-Ottawa Scale. Random-effects models were used to compute either standardized mean differences (SMD) of concentration or pooled adjusted odds ratios (aORs). Heterogeneity was assessed with I².</p><p><strong>Results: </strong>Fourteen studies (13 datasets for either lead or cadmium) comprising 72,467 participants were eligible for inclusion. The meta-analysis found that cadmium and lead exposure were significantly associated with higher odds of periodontitis, with pooled aORs of 1.22 (95% CI: 1.08-1.37) and 1.85 (95% CI: 1.42-2.41), respectively. Sensitivity analyses confirmed the robustness of the findings.</p><p><strong>Conclusion: </strong>This study provides evidence that exposure to lead and cadmium is significantly associated with periodontitis. These findings highlight the importance of reducing environmental exposure to these heavy metals as part of preventive strategies for periodontal disease. Further research is needed to explore the underlying biological mechanisms and evaluate potential interventions to reduce exposure-associated periodontitis.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"935"},"PeriodicalIF":2.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144765/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Desmoglein-3 autoantibodies in tissues of oral lichen planus patients and its correlation with disease severity: case-control study.","authors":"Doaa Abdelwadood, Yasmine Ahmed Fouad, Nashwa El-Khazragy, Ahmed Elsayed Hamed Amr","doi":"10.1186/s12903-025-06303-9","DOIUrl":"10.1186/s12903-025-06303-9","url":null,"abstract":"<p><strong>Background: </strong>Due to the not fully understood exact pathogenesis of oral lichen planus, the patients receive symptomatic management, rather than a curative treatment. Consequently, revealing the pathogenesis of OLP is a primary concern in oral medicine research. Elevated levels of circulating antibodies against Desmoglein 3 have been discovered in the serum of OLP patients. The aim of the present study was to evaluate the level of Desmoglein 3 autoantibodies in tissue biopsies of atrophic/bullous erosive OLP and to correlate it with the disease severity, in attempt to reveal if it has a role in the pathogenesis of the disease.</p><p><strong>Methods: </strong>This is a case-control study, tissue biopsies were obtained from clinically and histopathologically diagnosed atrophic/bullous-erosive oral lichen planus (OLP) lesions (n = 10). The oral lichen planus biopsies were compared with healthy uninflamed gingival tissues excised during periodontal surgeries (n = 10). The tissue biopsies were tested for quantitative levels of desmoglein 3 autoantibodies using ELISA test. The clinical severity of oral lichen planus lesions was evaluated by Elsabagh scoring system. The levels of desmoglein 3 autoantibodies were correlated with the disease severity.</p><p><strong>Results: </strong>The concentration of desmoglein 3 autoantibodies level in tissues of patients with atrophic/erosive OLP [3395.4 (± 526.9) Pg/g] was significantly higher (p < 0.001) than in tissues of healthy controls [2329.7 (± 307.6) Pg/g]. The student's t-test was used to compare between the two groups. Moreover, the concentration of desmoglein 3 autoantibodies showed a statistically significant positive correlation (ρ = 0.801) with OLP clinical severity scores (p = 0.005).</p><p><strong>Conclusions: </strong>Desmoglein 3 autoantibodies were detected in higher concentrations in oral lichen planus tissues compared to healthy controls. Increased concentration of desmoglein 3 autoantibodies is correlated with an increase in oral lichen planus clinical severity scores and vice versa. So, further investigation is needed to discover the exact role of Dsg3 autoantibodies in the pathogenesis of OLP.</p><p><strong>Trial registration: </strong>The study was registered on the Clinical Trial Registration Site (registration code: NCT06652477, last updated on 22-10-2024).</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"930"},"PeriodicalIF":2.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144807/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bactericidal effect of plasma-activated water generated by a novel super-potable plasma device as a novel antibacterial method: an in vitro study.","authors":"Yinglong Li, Yu Liu, Xin Yu, Fang Zhang, Ruonan Ma, RuiXue Wang, Zuomin Wang","doi":"10.1186/s12903-025-06217-6","DOIUrl":"10.1186/s12903-025-06217-6","url":null,"abstract":"&lt;p&gt;&lt;strong&gt;Background: &lt;/strong&gt;A continuous risk from bacterial infection poses a major environmental and public health challenge. As an emerging strategy for inhibiting bacterial infections, plasma-activated water (PAW) has proved highly effective, environment-friendly, and non-drug resistant to many bacteria. However, the plasma device is too big and requires specialists to operate, which inevitably limits its real-life application. It has been confirmed that the bactericidal effect of traditional PAW would be significantly reduced in the organic-rich environments. To better resolve the limitations, a novel super-portable plasma device was applied, and the low concentration of H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; was added to enhance the bactericidal effect of PAW in the organ-rich environments.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Methods: &lt;/strong&gt;A super-portable plasma device, weighing only 1 kg, was applied to generate PAW. Staphylococcus aureus (S. aureus), Escherichia coli (E. coli) and Porphyromonas gingivalis (P. gingivalis) were selected as the test bacteria. Colony-forming units (CFU) counting and bactericidal rate were employed to evaluate the bactericidal effect of PAW. Optical emission spectroscopy (OES) was used to identify the major reactive species in PAW. Different concentration of H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; was added to PAW (H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt;/PAW), and the pH, oxidation-reduction potential (ORP), conductivity, H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; and NO content of HP/PAW were measured to explore the bactericidal mechanisms. CCK-8 assay was used to assess the cytotoxicity of 0.1% H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt;/PAW on human periodontal ligament fibroblasts (hPDLFs).&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results: &lt;/strong&gt;The 20 mL of PAW generated by the novel super-portable plasma device achieved the bactericidal rate of 98.94% against S. aureus (t = 10 min) and 99.66% (t = 20 min). When the PAW was prepared with a volume of 20 mL, activation times of 6 min and 8 min, and the treatment time was 30 min, the bactericidal rates all exceeded 98% against P. gingivalis. The addition of 0.1% H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; significantly enhanced the antibacterial effect of PAW in the presence of Bovine Serum Albumin (BSA) (p&lt;0.05). The addition of 0.1% H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; lowered the pH, increased the ORP and conductivity, and raised the content of H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; and NO in the solution. Cytotoxicity evaluation indicated that 0.1% H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt;/PAW had moderate cytotoxicity only after 20 min of preparation and 48 h of treatment, while other preparation and treatment times showed mild or no cytotoxicity.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Conclusions: &lt;/strong&gt;The PAW generated by the novel super-portable plasma device exhibited an excellent bactericidal effect. The addition of low concentrations of H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; to PAW, specifically 0.1% H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt;/PAW, maintained an effective antibacterial effect in complex environments in the presence of BSA with non-cytotox","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"934"},"PeriodicalIF":2.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144717/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison Of Transfer Accuracy Among Hexed Implant Mounts, Clips Impression Copings, And Open-Tray Impression Copings at Different Implant Angulations: An In Vitro Study.","authors":"Merna M Seif, Ahmed A Abdel Hakim, Hassan M Abouelkheir, Rana A Negm","doi":"10.1186/s12903-025-06304-8","DOIUrl":"10.1186/s12903-025-06304-8","url":null,"abstract":"<p><strong>Background: </strong>Accurate impression registration is essential for transferring the three-dimensional (3D) implant position to the definitive cast, ensuring passivity of the final prosthesis. Various impression techniques have been developed to optimize accuracy, particularly for angulated implants. This study aimed to evaluate and compare the accuracy of open-tray impression copings, clips impression copings, and hexed implant mounts in transferring implant positions for both straight and angulated implants.</p><p><strong>Methods: </strong>Five implants with different angulations (three at 0°, one at 15°, and one at 25°) were placed in an epoxy resin model, reflecting angulations commonly encountered in clinical practice. Thirty impressions were made using three types of impression copings: open-tray, clips (closed-tray), and hexed implant mounts (closed-tray), with ten impressions per group. Impressions were poured, and CBCT scans of the reference model and casts were obtained. The resulting DICOM files were converted to STL format using reverse engineering software to evaluate implant position accuracy based on shoulder deviation, apical deviation, angular deviation, and vertical shift. A significance level of p < 0.05 was set. One-way ANOVA and post hoc tests were performed; Tukey's HSD was applied when variance homogeneity was met, while the Games-Howell test was used when this assumption was violated.</p><p><strong>Results: </strong>The study revealed that among the three coping types, the hexed implant mount demonstrated significantly higher angular deviation (p < 0.001), apical deviation (p = 0.003), and vertical shift (p < 0.001) for 25° angulated implants compared to the open-tray and clips copings. There were no significant differences between the open-tray and clips groups at this angulation. At 15° angulation, the hexed implant mount showed a significantly greater vertical shift (p = 0.011) compared to the open-tray coping, while no significant difference was observed between the clips and open-tray copings. For straight implants (0° angulation), all three coping types-open-tray, clips, and hexed implant mounts-showed no significant differences in any measured parameter.</p><p><strong>Conclusions: </strong>Open-tray and clips impression copings provide reliable implant position transfer for straight and angulated implants up to 25°. The hexed implant mount is accurate up to 15° angulation but shows increased deviations at 25°.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"928"},"PeriodicalIF":2.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12142942/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optical measurement methods of the 3D-position stability of implant-abutment connections - an in vitro study.","authors":"S Wenger, L Martin, A Kernen-Gintaute, C Müller, K Nelson, Florian Kernen","doi":"10.1186/s12903-025-06265-y","DOIUrl":"10.1186/s12903-025-06265-y","url":null,"abstract":"<p><strong>Introduction: </strong>For ideal occlusion and passive fit of implant-retained prosthetic restorations minimal tolerance of the position of the abutment in the implant after dis- and reassembly is essential. Methods to examine the three-dimensional (3D) positional stability of implant-abutment connections (IAC) vary and their accuracy and applicability have not been assessed. The aim of this study was to evaluate non-contact optical measurement devices for 3D-feasibility, accuracy, repeatability, time efficiency and complexity of use.</p><p><strong>Methods: </strong>Five devices capable of contactless, optical methods (Profile Projector; Digital Image Correlation (DIC); Profilometer; Confocal Technology; Coordinate Measuring Machine (CMM)) were examined regarding their 3D-feasibility, accuracy, repeatability, time efficiency and complexity. The parameters were quantified and scored using a decision matrix. In an experimental set-up the method (device) with the highest score was used to measure the position stability as follows: four implants with a butt joint (BJ) and a conical (CON) IAC were embedded in an aluminum block and dis- and reassembled ten times with the abutment screw being hand-tightened (∑1-5) and torque-tightened (∑6-10).</p><p><strong>Results: </strong>The CMM achieved the highest score in the decision matrix with 40/50 points (range: 10-50 points; 10 requirements not met, 50: requirements fully met) while the Profile Projector, the DIC, the Profilometer and the Confocal Technology achieved 30, 32, 34, 38 points, respectively. Using the CMM the mean rotational freedom in BJ vs. CON was 0.32° ± 0.16° vs. 0.21° ± 0.25° (hand-tightened) and 0.36° ± 0.09° vs. 0.20° ± 0.22° (ratchet), respectively. The maximum vertical deviation of the abutment position after re-assembly was 7.2 μm ± 2.1 μm (BJ) and 24.4 μm ± 2.1 μm (CON).</p><p><strong>Conclusion: </strong>The data acquired suggest that the CMM with its non-contact, optical measurement method is the most appropriate to investigate the 3D positional stability of the IAC in different implant systems. As previously described distinct differences between BJ and CON IACs were found. CON connections exhibit a higher vertical deviation when the system specific torque value was applied.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"931"},"PeriodicalIF":2.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144691/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Periodontal diseases among pregnant adolescents and young women in Nigeria: a scoping review.","authors":"Saheed Ademola Ibraheem, Omorinola Adekemi Afolabi, Richard Oveh, Abel Chukwuemeka, Anita Dabar, Francisca Obiageri Nwaokorie, Abideen Olurotimi Salako, Titilola Abike Gbaja-Biamila, Folusho John Owotade, Folahanmi Tomiwa Akinsolu, George Uchenna Eleje, Oliver Chukwujekwu Ezechi, Moréniké Oluwátóyìn Foláyan","doi":"10.1186/s12903-025-06004-3","DOIUrl":"10.1186/s12903-025-06004-3","url":null,"abstract":"<p><strong>Background: </strong>Gingivitis increases the risk of adverse pregnancy outcomes. The study aimed to map the evidence of periodontal diseases in pregnant adolescents and young adults in Nigeria.</p><p><strong>Methods: </strong>This scoping review was registered on the Open Science Framework (registration DOI https://doi.org/10.17605/OSF.IO/HVCD5 ). A literature search was conducted in August 2024 in two electronic databases (Web of Science, PubMed), and EBSCO, and Google Scholar for articles written in English reporting periodontal diseases in pregnant adolescents (15-19 years) and young adults (20-24 years) in Nigeria following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses for Scoping Reviews (PRISMA-ScR). This review excluded abstracts, literature reviews, conference proceedings, letters to the editor, and editorials. Information extracted from the publications that met the inclusion criteria were the study design, study location, sample size, gestation stage, prevalence of periodontal diseases, and identified risk factors for periodontal diseases. A descriptive analysis of the extracted data was conducted.</p><p><strong>Results: </strong>Among the 768 articles screened, no study met the eligibility criteria. However, four studies reported on risk factors for periodontal diseases in a sample of 1066 pregnant women age < 20 years to > 40 years that included 202 (18.9%) pregnant adolescents and young adults. The prevalence of periodontal diseases ranged from 45.8 to 100%. One study reported that the highest score of healthy gingivae was among the 20-24 age group; one study reported that prevalence of gingivitis increased with increasing trimester; another reported the highest prevalence of gingival bleeding and the lowest prevalence of calculus in the first trimester, while one study could not establish a statistically significant relationship between periodontal diseases and gestational age. The four studies were conducted in two of Nigeria's six geopolitical zones, and all were hospital-based.</p><p><strong>Conclusion: </strong>The lack of generalizable studies on risk factors for periodontal diseases among pregnant adolescents and young adults in Nigeria limits access to evidence for policy and program design. There is a need for broader, representative research to address these gaps.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"936"},"PeriodicalIF":2.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144776/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accuracy of static-guided endodontics for access cavity preparation with pulp canal obliteration: a randomized controlled clinical trial.","authors":"Jiayang Li, Yufeng Hu, Zhifei Ma, Hui Liu, Liqun Cao, Xiaoling Wei","doi":"10.1186/s12903-025-06275-w","DOIUrl":"10.1186/s12903-025-06275-w","url":null,"abstract":"<p><strong>Background: </strong>Locating calcified canals in teeth with pulp canal obliteration remains particularly challenging. The absence of data from randomized controlled trials conducted in vivo has been a critical gap. The objective of this study was to comprehensively assess the accuracy of static-guided endodontics in addressing the challenges of pulp canal obliteration through a randomized controlled clinical trial, as well as pain during treatment and clinical outcomes.</p><p><strong>Methods: </strong>Eighty patients with pulp canal obliteration were selected from July 2020 to March 2022 and randomly divided into two groups. In the freehand group, patients underwent contemporary freehand access cavity preparation. Patients in the static-guided group underwent innovative access cavity preparation using three-dimensional-printed endodontic guides for precise root canal localization. The quantitative accuracy was subsequently evaluated through meticulous assessment of indirect impression scans obtained from the access cavities. Moreover, pain during treatment and clinical outcome were investigated.</p><p><strong>Results: </strong>All participants were randomly assigned to treatment groups. The static-guided group showed high accuracy, with average deviations of 0.14 ± 0.08 mm at the coronal entry point, 0.35 ± 0.16 mm at the apical point, and an angular deviation of 1.75 ± 0.30 °. These deviations were significantly lower than those in the freehand group (P < 0.0001). No significant difference were found between the groups regarding pain during treatment and clinical outcomes after one year (P > 0.05).</p><p><strong>Conclusion: </strong>This study demonstrates, within its limitations, the static endodontics guides represent an accurate method in locating root canals for pulp canal obliteration through a randomized controlled clinical trial.</p><p><strong>Trial registration: </strong>The Chinese Clinical Trial Registry, NO. ChiCTR2000037260 (27/08/2020, retrospectively registered).</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"933"},"PeriodicalIF":2.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144754/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Utilization of magnification devices in Vietnam's dental practice and education: an online survey.","authors":"Minh-Hieu Nguyen Tran, Anh Huynh Bui, Lan-Anh Hoang Le, Thuy-Trang Thi Huynh, Phuong-Doan Phan, Thuan-Loc Tran, Nguyen-Tra-Mi Le, Thu-Tra Nguyen, Hoang-Vinh Le, Dai-Phong Lam, Quoc-Viet Lam, Tran-Lan-Khue Pham, An-Tran Pham, Van-Khoa Pham","doi":"10.1186/s12903-025-06306-6","DOIUrl":"10.1186/s12903-025-06306-6","url":null,"abstract":"","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"929"},"PeriodicalIF":2.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12142841/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gender gap in tooth brushing among Korean adolescents.","authors":"Ichiro Kawachi, Jae-In Ryu","doi":"10.1186/s12903-025-06323-5","DOIUrl":"10.1186/s12903-025-06323-5","url":null,"abstract":"<p><strong>Background: </strong>Previous studies have reported a gender gap in toothbrushing habits. Before the COVID-19 pandemic, the prevalence of tooth brushing after lunch among South Korean schoolboys (29.2%) was approximately half of that among girls (48.5%). During the pandemic, the rate of tooth brushing decreased in both boys and girls. However, the gender gap in toothbrushing decreased by 5.6%, owing to a larger decline in girls. This study aimed to understand the gender gap in toothbrushing before and during the pandemic.</p><p><strong>Materials and methods: </strong>Based on analyses of data obtained from the Korea Youth Risk Behavior Web-based Survey from 2017 to 2022, the nationally representative sample (n = 341,265) comprised middle and high school students. Chi-square tests and weighted probit regressions were performed to evaluate differences in the prevalence of tooth brushing after lunch according to socioeconomic factors, health-related behaviors, and mental health conditions. All analyses were performed using Stata (version 18.0, Stata Corp, College Station, Texas, USA), and statistical significance was set to α = 0.05.</p><p><strong>Results: </strong>The gender gap cannot be explained by differences in hygiene practices (e.g., handwashing), health behaviors (smoking), parental education, family socioeconomic circumstances, depressive symptoms, or stress. One reason for the decline may be the policy of mandatory mask-wearing in Korean schools during the pandemic.</p><p><strong>Conclusions: </strong>If girls were more motivated than boys to brush their teeth for cosmetic reasons (clean appearance of teeth or fresh breath), this may account for the larger decrease in tooth brushing among girls during the mandatory mask-wearing policy.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"938"},"PeriodicalIF":2.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144724/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}