Journal of dentistry最新文献

{"title":"Antibacterial and demineralisation-inhibiting properties of silver complex fluoride on dentine caries: an in vitro study","authors":"Grace Y Xu ,&nbsp;Iris X Yin ,&nbsp;Irene S Zhao ,&nbsp;Christie YK Lung ,&nbsp;Edward CM Lo ,&nbsp;Chun Hung Chu","doi":"10.1016/j.jdent.2026.106528","DOIUrl":"10.1016/j.jdent.2026.106528","url":null,"abstract":"<div><h3>Objective</h3><div>The objective of this study was to investigate the antibacterial and demineralisation-inhibiting effects of a non-discolouring silver complex fluoride (SCF) on artificial dentine caries.</div></div><div><h3>Methods</h3><div>Dentine blocks with artificial carious lesions were treated with SCF, silver diamine fluoride (SDF, as positive control), and water (as negative control). Then the blocks underwent <em>Streptococcus mutans</em> biofilm and pH–cycling for 7 days. The morphology, viability and growth kinetics of the biofilm were evaluated by scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM) and colony-forming unit (CFU) counting, respectively. The dentine surface morphology, lesion depths and mineral loss, chemical structure and crystal characteristics were determined using SEM, micro-computed tomography, Fourier transform infrared (FTIR), and X-ray diffraction (XRD), respectively. One-way analysis of variance with the Bonferroni post hoc test was performed to assess and compare the data.</div></div><div><h3>Results</h3><div>SEM revealed confluent bacterial growth covering the surface of dentine treated with water but not SCF and SDF. CLSM showed that the dead-to-live ratios of biofilms treated with SCF, SDF, and water were 0.77 ± 0.16, 0.88 ± 0.40, and 0.44 ± 0.03, respectively (<em>p</em> &lt; 0.001, SCF, SDF&gt;Water). The Log CFU values of the biofilm treated with SCF, SDF and water were 6.7 ± 0.1, 6.6 ± 0.2 and 7.8 ± 0.1 (<em>p</em> &lt; 0.001, SCF, SDF&lt;Water). SEM images showed Group SCF had less exposed dentine collagen fibers than Group Water. Micro-computed tomography showed the lesion-depth (μm) of dentine treated with SCF, SDF and water were 40±5, 35±8 and 180±20 (<em>p</em> &lt; 0.001, SCF, SDF&lt;Water). The mineral loss (gHApcm⁻³) of dentine treated with SCF, SDF and water were 0.24±0.05, 0.20±0.03 and 0.45±0.03 (<em>p</em> &lt; 0.001, SCF, SDF&lt;Water). FTIR showed the amide I-to-hydrogen phosphate ratios of dentine treated with SCF, SDF and water were 0.25±0.03, 0.22±0.03, and 0.43±0.05 (<em>p</em> &lt; 0.001, SCF, SDF&lt;Water). XRD revealed that the hydroxyapatite in SDF and SCF groups was better crystallised than that of water Group.</div></div><div><h3>Conclusion</h3><div>This study demonstrated that SCF inhibited the growth of <em>S. mutans</em> biofilm and reduced the demineralisation of artificial dentine caries.</div></div><div><h3>Clinical significance</h3><div>If SCF is successfully translated into clinical application, it may be a novel anti-caries agent for clinicians to arrest dentine caries</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106528"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146097038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the 5-year clinical efficacy of cross-arch fixed dental prostheses as periodontal splints on periodontal tissue stability","authors":"Weijie Wu ,&nbsp;Jun Chen ,&nbsp;Yan Liu ,&nbsp;Ganggang Qi ,&nbsp;Chuchu Xu ,&nbsp;Xiaoyu Chen ,&nbsp;Hongye Lu ,&nbsp;Fuming He","doi":"10.1016/j.jdent.2026.106529","DOIUrl":"10.1016/j.jdent.2026.106529","url":null,"abstract":"<div><h3>Objectives</h3><div>To investigate the clinical efficacy of the cross-arch fixed dental prostheses as periodontal splints and to identify the key factors influencing its treatment outcomes.</div></div><div><h3>Materials and Methods</h3><div>Thirty-seven patients with 51 tooth-supported cross-arch prostheses (mean follow-up: 63 months; mean bridge length: 10.24 units) were retrospectively analyzed. Survival rates, complications, alveolar bone level (ABL), probing pocket depth (PPD), bleeding on probing (BoP), plaque index (PI), prosthesis characteristics, and patient satisfaction were documented at baseline (T0), 1 year (T1), 3 years (T2) and 5 years (T3) after loading. Cumulative survival rates (CSRs) were calculated using Kaplan-Meier curves. Risk factors for changes in PPD (ΔPPD) and alveolar bone level (ΔABL) were screened by univariate analyses and assessed using multivariable generalized linear and logistic regression models.</div></div><div><h3>Results</h3><div>Five-year prosthesis survival was 95.16% (100% at 1- and 3-year). PPD decreased significantly from T0 (3.84 ± 0.81 mm) to T1 (3.26 ± 0.92 mm) and T2 (3.33 ± 0.84 mm; <em>p</em> &lt; 0.05), while ABL remained clinically stable, and BoP and PI were maintained at low levels throughout the study period. Quadrilateral abutment configuration was significantly associated with reduced bone loss (<em>β</em> = -0.551, <em>p</em> = 0.002) and reduced ΔPPD (<em>β</em> = -0.704, <em>p</em> &lt; 0.001). Bilateral terminal abutment prostheses (<em>β =</em> -0.389<em>, p</em> <em>=</em> 0.013) also showed a protective effect on ΔPPD. Patient satisfaction remained high (<em>p</em> &gt; 0.05).</div></div><div><h3>Conclusion</h3><div>Cross-arch fixed prostheses provided predictable periodontal stabilization with high survival rates. Periodontal maintenance and prosthetic design are key determinants of outcomes.</div></div><div><h3>Clinical significance</h3><div>Tooth-supported cross-arch prostheses achieved long-term survival and maintained periodontal parameters in Stage III/IV periodontitis, supporting their use as long-span splints when properly planned and maintained. Abutment distribution and strict supportive periodontal care were key determinants, guiding prosthetic design and follow-up.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106529"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146113366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical acceptability and repeatability of three-dimensional maxillary positioning following orthognathic surgical wafer placement: An in vitro study","authors":"Eun-Hack Andrew Choi ,&nbsp;Yunji Shin ,&nbsp;Jae-Hun Yu ,&nbsp;Jeenyoung Kim ,&nbsp;Utkarsh Mangal ,&nbsp;Jun-Young Kim ,&nbsp;Sung-Hwan Choi","doi":"10.1016/j.jdent.2026.106536","DOIUrl":"10.1016/j.jdent.2026.106536","url":null,"abstract":"<div><h3>Objectives</h3><div>To quantify the three-dimensional (3D) deviation between planned and achieved maxillary positions after transfer using a surgical wafer under <em>in vitro</em> conditions, and assess clinical acceptability and repeatability for each workflow.</div></div><div><h3>Methods</h3><div>A bracketed typodont mounted on a mannequin was used to define three groups—Conventional (alginate impressions/plaster casts/laboratory scanning), Trios (Trios 3 intraoral scanner (IOS)), and Prime (Primescan IOS)—each with 10 technical replicates. For each replicate, virtual surgical planning was performed, a wafer was designed and 3D-printed, and the maxilla was positioned; 3D deviation was quantified as: (1) point-based 3D positional deviation (three landmarks) and (2) matrix-based 3D translational and rotational deviations. Clinical acceptability was defined as the proportion of the 10 replicates per group with 3D deviation within predefined clinical tolerance limits (0.5 mm for positional/translational; 1.0° for rotational). Repeatability was summarized by the repeatability standard deviation (s_r) as specified in ISO 5725.</div></div><div><h3>Results</h3><div>The Trios and Prime groups achieved 100% clinical acceptability across all 3D deviations. In the Conventional group, acceptability was 90% for the anterior landmark’s positional and translational deviation, with all others achieving 100%. The s_r was 0.13–0.20 mm (positional), 0.23 mm (translational), and 0.22° (rotational) for the Conventional group; 0.04–0.13 mm, 0.06 mm, and 0.24° for the Trios group; 0.04–0.10 mm, 0.11 mm, and 0.17° for the Prime group.</div></div><div><h3>Conclusion</h3><div>Under <em>in vitro</em> conditions, the demonstrated clinical acceptability and repeatability provide preliminary evidence supporting the clinical feasibility of a fully digital IOS-based workflow for wafer-mediated maxillary positioning.</div></div><div><h3>Clinical significance</h3><div>An IOS–based workflow can be considered clinically feasible for wafer-mediated maxillary positioning without compromising accuracy, as evaluated in terms of clinical acceptability and repeatability, while potentially eliminating impression-taking and cast fabrication steps.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106536"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146119105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical efficacy of orifice barriers in endodontics: A systematic review","authors":"Michael E. Wylie ,&nbsp;James R. Fernando ,&nbsp;Peter Parashos ,&nbsp;Alastair J. Sloan ,&nbsp;Joseph E.A. Palamara ,&nbsp;Nadia Kaunein","doi":"10.1016/j.jdent.2026.106556","DOIUrl":"10.1016/j.jdent.2026.106556","url":null,"abstract":"<div><h3>Objectives</h3><div>Orifice barriers (OBs) are commonly placed as sub-seals following root canal treatment, to resist microbial leakage if the primary coronal seal fails. However, despite numerous <em>in vitro</em> studies, clinical evidence supporting their efficacy is limited. This is the first systematic review of the <em>in vivo</em> endodontic literature evaluating OB effectiveness in root filled teeth (RFT), addressing a critical research gap.</div></div><div><h3>Data sources</h3><div>MEDLINE, Embase, CENTRAL, Web of Science and Scopus were systematically searched from inception through 16^th May 2025. Articles were screened using Covidence by two independent reviewers. Risk of bias and certainty of evidence assessments were undertaken to assess methodological rigour of included studies.</div></div><div><h3>Study selection and results</h3><div>Seven studies met the inclusion criteria. OBs improved outcomes for teeth with radicular cracks in two small single-arm cohort studies (90.6 % success &amp; 96.6 % survival at 2-4years; 100 % at 1-3years). OBs were associated with lower apical periodontitis (AP) in one cross-sectional study (<em>p</em> &lt; 0.005), while in a second, positioning the root filling/coronal restoration interface apical to marginal bone level was associated with lower AP (<em>p</em> &lt; 0.005). Two remaining cohort studies showed no significant benefit for OBs in RFT. One randomised controlled trial showed no benefit of OBs, but follow-up was only one year. Heterogeneity among studies precluded meta-analysis.</div></div><div><h3>Conclusions</h3><div>Very low certainty <em>in vivo</em> evidence supports OBs in cracked RFT, but there is little evidence for OBs elsewhere. The limitations identified underscore the need for well-designed prospective <em>in vivo</em> studies to validate the evidence base for OBs.</div></div><div><h3>Clinical significance</h3><div>OB placement apical to radicular cracks may improve success and survival for cracked RFT, with specialist referral for treatment under microscopy recommended in such cases. OBs may play a role in creating a well-sealed coronal restoration following RCT, but further clinical research is required to determine their efficacy.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106556"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146132001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical effectiveness of bulk-fill composite resins in restorative dentistry: a scoping review and thematic analysis","authors":"Ana Paula Caracas-de-Araújo ,&nbsp;José Evando da Silva-Filho ,&nbsp;Ana Beatriz Cardoso-Oliveira ,&nbsp;Mariana Veras Godeiro ,&nbsp;Lara Gabriele de Oliveira-Alves ,&nbsp;Maria Denise Rodrigues de-Moraes","doi":"10.1016/j.jdent.2026.106557","DOIUrl":"10.1016/j.jdent.2026.106557","url":null,"abstract":"<div><h3>Objectives</h3><div>To map the clinical evidence regarding the applications, advantages, and limitations of bulk-fill composite resins in restorative dentistry.</div></div><div><h3>Data</h3><div>The study protocol was registered on the Open Science Framework platform (doi: <span><span>10.17605/OSF.IO/VG92D</span><svg><path></path></svg></span>). This scoping review was reported according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) guidelines.</div></div><div><h3>Sources</h3><div>Comprehensive searches were performed in Medline (PubMed), ProQuest (Dissertations &amp; Theses), SciELO, Scopus, Virtual Health Library (VHL), and Web of Science (WoS). The search was initially conducted in February 2025 and updated in November 2025. Study selection was performed by two reviewers independently.</div></div><div><h3>Study selection</h3><div>A total of 1,837 records were identified (1,806 from the initial search and 31 from the update). Full-text analysis was conducted for 80 studies from the initial search. Ultimately, 65 studies were definitively included in the review (58 from the initial search and 7 from the update), consisting of a descriptive synthesis and a thematic analysis.</div></div><div><h3>Conclusions</h3><div>Clinical evidence supports bulk-fill resins as a resource-efficient alternative to incremental layering with comparable survival rates. Although they simplify procedures, longevity relies on the adhesive strategy and technical execution rather than material chemistry. Future standardized trials are required to minimize the data heterogeneity observed in the current literature.</div></div><div><h3>Clinical significance</h3><div>Bulk-fill composite resins are predictable and effective materials for direct restorations, providing a simplified and reliable alternative to the traditional incremental layering technique.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106557"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146132092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"1,10-Phenanthroline enhances dentin bond durability via dual-site binding to collagen and matrix Metalloproteinase-8","authors":"Jing-hui Lin ,&nbsp;Xin-wen Tong ,&nbsp;Bing-jie Zhong ,&nbsp;Deng-wei Hong ,&nbsp;Hao Yu","doi":"10.1016/j.jdent.2026.106554","DOIUrl":"10.1016/j.jdent.2026.106554","url":null,"abstract":"<div><h3>Objectives</h3><div>This study aimed to evaluate the effect of 1,10-Phenanthroline (Phen) on dentin bond durability and to explore its potential interactions with matrix metalloproteinase-8 (MMP-8) and type I collagen.</div></div><div><h3>Methods</h3><div>Dentin specimens were etched with 35% phosphoric acid and pretreated with deionized water (DW), 2% chlorhexidine (CHX), ethanol (EtOH, Phen solvent), 0.01 mM Phen, 1 mM Phen, and 100 mM Phen. Following the application of a universal adhesive and composite resin, the specimens were divided into non-aged and aged (10,000 thermocycles) subgroups for microshear bond strength (μSBS), failure mode, nanoleakage, and in situ zymography analyses. Molecular docking was performed to assess Phen’s binding affinity to MMP-8 and dentin collagen.</div></div><div><h3>Results</h3><div>Non-aged groups showed comparable μSBS. After aging, the 1 mM and 100 mM Phen groups maintained bond strength, with no significant reduction observed. These groups also showed a tendency for reduced nanoleakage and lower MMP activity at the bonding interface compared to the DW and CHX groups. Moreover, the EtOH group demonstrated results comparable to the DW group, confirming that EtOH does not contribute to the efficacy of the Phen solution and that the observed benefits are attributable solely to Phen. Molecular docking suggested favorable binding energies for Phen with both type I collagen (-4.64 kcal/mol) and MMP-8 (-7.37 kcal/mol), involving hydrogen bonds.</div></div><div><h3>Conclusion</h3><div>1,10-Phenanthroline significantly improves the durability of the resin-dentin bond. Its superior performance over CHX is attributed to a dual-site mechanism that directly stabilizes collagen and potently inhibits MMP-8, thereby protecting the hybrid layer from degradation.</div></div><div><h3>Clinical significance</h3><div>The results suggest that 1,10-Phenanthroline pretreatment could be a promising strategy to improve the long-term stability of adhesive restorations in clinical dentistry.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106554"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146132052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Segmentation of the upper airway using deep learning - nnUNet","authors":"Silvia Gianoni-Capenakas ,&nbsp;Alejandro Matos-Camarillo ,&nbsp;Gauthier Dot ,&nbsp;Thomas Schouman ,&nbsp;Akhilanand Chaurasia ,&nbsp;Benjamin Pliska ,&nbsp;Manuel Lagravere ,&nbsp;Kumaradevan Panithakumar","doi":"10.1016/j.jdent.2026.106507","DOIUrl":"10.1016/j.jdent.2026.106507","url":null,"abstract":"<div><h3>Objective</h3><div>The objective of this study is to assess the performance of a deep learning-based framework for automated segmentation of the entire upper airway using CBCT and CT datasets.</div></div><div><h3>Methods</h3><div>A dataset comprised of 220 multi-source 3D images, including CBCT and CT from institutions in Canada, Chile, and France, covering both adult and pediatric scans, as well as pre- and post-operative scans, was used. A “one-center-out” validation was performed using CBCT scans from an Institution in India. Ground truth was established through manual segmentation using 3D Slicer. Deep learning models were implemented, focusing on a multi-source training approach with nnUNet.</div></div><div><h3>Results</h3><div>The multi-source model achieved a high average Dice score of 0.962. Furthermore, the nnUNet-155 model demonstrated an absolute volume difference of 3.31% compared to manual segmentation, with a prediction time of only 5 minutes per volume.</div></div><div><h3>Conclusions</h3><div>This robust, efficient, and generalizable deep learning model provides a valuable tool for clinicians and researchers, enabling precise and consistent 3D analysis of the upper airway to support clinical decision-making and research across a wide range of patient demographics and imaging modalities.</div></div><div><h3>Clinical Significance</h3><div>This study introduces a robust and efficient deep learning model for automated 3D upper airway segmentation. This tool is clinically relevant as it provides clinicians with a precise, consistent, and time-saving method for analyzing the upper airway. By overcoming the limitations of manual segmentation—namely, labor intensity and inter-observer variability—this model facilitates more reliable clinical decision-making and research across diverse patient populations and imaging modalities.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106507"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145989286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Occlusal and behavioral factors associated with vertical root fractures in endodontically treated teeth: A retrospective matched case-control study","authors":"Piraya Sricharat ,&nbsp;Napat Nalamliang ,&nbsp;Thanomsuk Jearanaiphaisarn","doi":"10.1016/j.jdent.2026.106553","DOIUrl":"10.1016/j.jdent.2026.106553","url":null,"abstract":"<div><h3>Objectives</h3><div>This study investigated clinical factors and oral functional behaviors associated with vertical root fractures (VRFs) in endodontically treated teeth (ETT).</div></div><div><h3>Methods</h3><div>Forty-nine matched pairs of patients who attended the Graduate Endodontic Clinic between 2017 and 2024 were included. Each pair consisted of one patient with a VRF in an ETT and one matched control without a VRF. Matching was based on sex, age, tooth type, and duration since root canal treatment. Retrospective clinical and radiographic data were collected to assess tooth-related factors, including root canal filling length, type of restoration, type of post, adjacent teeth, and opposing dentition. At the recall visit, occlusal characteristics, tooth wear, bony exostosis, and mandibular plane angle were examined and patients completed structured interviews regarding oral functional behaviors at the time of VRF detection. Univariable logistic regression was performed, and variables with <em>p</em> &lt; 0.05 were entered into a multivariable model. Mandibular angles were compared using independent <em>t</em>-tests.</div></div><div><h3>Results</h3><div>Metal posts, protrusive occlusal interference, unilateral chewing, and frequent intake of hard or sticky foods were significantly associated with VRF. Multivariate analysis confirmed all of these factors, except sticky food intake, as independent predictors, whereas the remaining variables were not significant.</div></div><div><h3>Conclusions</h3><div>Unilateral chewing and consumption of hard foods were strongly associated with VRFs, along with the presence of metal posts and protrusive occlusal interference.</div></div><div><h3>Clinical Significance</h3><div>Assessing occlusal patterns, masticatory behaviors, and post type in endodontically treated teeth is important. Early identification and management of these factors may help reduce VRF occurrence and improve long-term prognosis.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106553"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146132065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development and Evaluation of an Automated Robotic System for Full Crown Preparation","authors":"Huayu Fang ,&nbsp;Heng Liu ,&nbsp;Chen Liu ,&nbsp;Yuanxue Gao ,&nbsp;Shiwei Song ,&nbsp;Junchen Wang ,&nbsp;Shizhu Bai ,&nbsp;Yimin Zhao","doi":"10.1016/j.jdent.2026.106520","DOIUrl":"10.1016/j.jdent.2026.106520","url":null,"abstract":"<div><h3>Objectives</h3><div>To develop a robotic system for full crown tooth preparation and to evaluate its preparation accuracy and operation time.</div></div><div><h3>Methods</h3><div>The robotic system comprised a robotic arm, an infrared optical tracking system, and proprietary planning/control software. The planning workflow encompassed path planning for axial and occlusal surfaces, functional cusp bevels, and acute line angles, culminating in the generation of an ideal preparation morphology. Twenty-two standardized partial dentition models of mandibular teeth 35–37 were additively manufactured and equally allocated into two experimental groups based on preparation methodology: an automated robotic system group and a step-by-step guide group. Operation time was recorded concurrently. Post-preparation scan data were imported into three-dimensional reverse engineering software to calculate the root-mean-square-error (RMSE) values for the overall surfaces, axial surfaces, occlusal surfaces, and chamfer regions to evaluate preparation accuracy.</div></div><div><h3>Results</h3><div>In the posterior crown preparation model experiment, the robotic group showed significantly lower RMSE values than the guide group overall and by region: overall, 0.18±0.03 vs 0.33±0.05 mm; axial, 0.15±0.06 vs 0.27±0.08 mm; occlusal, 0.20±0.05 vs 0.38±0.07 mm; chamfer, 0.12±0.03 vs 0.30±0.07 mm. The occlusal surface yielded the lowest accuracy in both groups. The robotic system also significantly reduced preparation time (350.15±7.79 s vs. 583.93±90.48 s), confirming its efficiency advantage.</div></div><div><h3>Conclusions</h3><div>This study developed an automated robotic system for crown preparation that demonstrated superior accuracy and shorter operation time compared with the guide approach.</div></div><div><h3>Clinical significance</h3><div>In this study, we developed a novel robotic system for full crown preparation that may enable precise and efficient procedures, representing a promising approach for achieving high-accuracy tooth preparation while minimizing tissue removal.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106520"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146046751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aromatherapy with essential oils to reduce anxiety, pain, and discomfort during in-office dental procedures: A scoping review","authors":"Reinaldo Adelino de Sales Junior,&nbsp;Anderson Kaian de Lima Maniçoba,&nbsp;Mariana Silva de Bessa,&nbsp;Bárbara Faria de Sá Barbosa,&nbsp;Patrick Wesley Marques de Boa,&nbsp;Boniek Castillo Dutra Borges","doi":"10.1016/j.jdent.2026.106515","DOIUrl":"10.1016/j.jdent.2026.106515","url":null,"abstract":"<div><h3>Objectives</h3><div>To map, analyze, and summarize the available clinical evidence on the use of aromatherapy with essential oils to manage anxiety and pain during dental procedures, and to identify gaps and directions for future research.</div></div><div><h3>Methods</h3><div>This scoping review followed the Joanna Briggs Institute (JBI) methodology and the PRISMA-ScR guidelines. Clinical trials from any year and language that assessed whether aromatherapy reduced anxiety or pain in dental settings were included. Studies without a control group were excluded. Searches were conducted in PubMed, Web of Science, Scopus, and Embase in June 2025.</div></div><div><h3>Results</h3><div>Twenty clinical trials involving 3460 participants were included. Eleven essential oils were investigated, with lavender being the most frequently studied (<em>n</em> = 13). Most studies assessing anxiety reported favorable trends associated with aromatherapy (<em>n</em> = 17), whereas studies evaluating pain generally reported no significant differences between groups (<em>n</em> = 7). Substantial heterogeneity was observed regarding intervention protocols, delivery methods, dosages, and outcome measures. Only one study employed an olfactory control, limiting interpretation of whether observed effects were attributable to essential oils or to odor masking in the dental environment.</div></div><div><h3>Conclusions</h3><div>Aromatherapy with essential oils might demonstrate potential to reduce anxiety during dental care. However, its validation in dentistry requires greater methodological standardization and the inclusion of olfactory control groups.</div></div><div><h3>Clinical relevance</h3><div>Aromatherapy may offer potential benefits as an adjunctive approach to improve patient experience, particularly anxiety-related outcomes, during dental care; however, current evidence remains heterogeneous and inconclusive.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106515"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146018732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}