Journal of dentistry最新文献

{"title":"Self-supervised learning enhances periapical films segmentation with limited labeled data.","authors":"Meiyu Hu, Qianli Zhang, Zhenyang Wei, Pingyi Jia, Mu Yuan, Huajie Yu, Xu-Cheng Yin, Junran Peng","doi":"10.1016/j.jdent.2025.106150","DOIUrl":"https://doi.org/10.1016/j.jdent.2025.106150","url":null,"abstract":"<p><strong>Objectives: </strong>To overcome reliance on large-scale, costly labeled datasets and annotation variability for accurate periapical film segmentation. This study develops a self-supervised learning framework requiring limited labeled data, enhancing practical applicability while reducing extensive manual annotation efforts.</p><p><strong>Methods: </strong>This research proposes a two-stage framework: 1) Self-supervised pre-training. A Vision Transformer (ViT), initialized with weights from the DINOv2 model pre-trained on 142M natural images (LVD-142M), undergoes further self-supervised pre-training on our dataset of 74,292 unlabeled periapical films using student-teacher contrastive learning. 2) Fine-tuning adapts these features for segmentation. The domain-adapted ViT is fine-tuned with a Mask2Former head on only 229 labeled films for segmenting seven critical dental structures (tooth, pulp, crown, fillings, root canal fillings, caries, periapical lesions).</p><p><strong>Results: </strong>The domain-adapted self-supervised method significantly outperformed traditional fully-supervised models like U-Net and DeepLabV3+ (average Dice coefficient: 74.77% vs 33.53%-41.55%; 80%-123% relative improvement). Comprehensive comparison with cutting-edge SSL methods through cross-validation demonstrated the superiority of our DINOv2-based approach (74.77 ± 1.87%) over MAE (72.53 ± 1.90%), MoCov3 (65.92 ± 1.68%) and BEiTv3 (65.17 ± 1.77%). The method surpassed its supervised Mask2Former counterparts with statistical significance (p<0.01).</p><p><strong>Conclusions: </strong>This two-stage, domain-specific self-supervised framework effectively learns robust anatomical features. It enables accurate, reliable periapical film segmentation using very limited annotations. The approach addresses the challenge of labeled data scarcity in medical imaging.</p><p><strong>Clinical significance: </strong>This approach provides a feasible pathway for developing AI-assisted diagnostic tools. It can improve diagnostic accuracy through consistent segmentation and enhance workflow efficiency by reducing manual analysis time, especially in resource-constrained dental practices.</p>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":" ","pages":"106150"},"PeriodicalIF":5.5,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145258316","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":"Four-Dimensional (4D) Virtual Simulation for Predicting Soft Tissue Support and Vertical Dimension of Occlusion in Full-Arch Implant Therapy - A Proof of Concept.","authors":"M Pirc, S Wenk, D Peter, A Ioannidis, R Jung, T Joda","doi":"10.1016/j.jdent.2025.106142","DOIUrl":"https://doi.org/10.1016/j.jdent.2025.106142","url":null,"abstract":"<p><strong>Objective: </strong>To describe a proof-of-concept digital workflow for four-dimensional (4D) virtual simulation of facial soft tissue support in edentulous patients, based on a real clinical case.</p><p><strong>Methods: </strong>A non-invasive digital workflow was developed using intraoral, extraoral, and laboratory scans. These datasets were merged into a simulation three-dimensional (3D) model using finite element methods. Skeletal structures were represented by surface meshes, and soft tissues by volumetric tetrahedral elements. Simulations predicted changes in lip support, occlusal vertical dimension, and facial esthetics. The workflow required no additional radiographic imaging and utilized standard clinical scanning tools.</p><p><strong>Results: </strong>The technique was demonstrated on a fully edentulous patient and proved clinically feasible. Accurate alignment of intraoral and facial scans enabled dynamic visualization of soft tissue changes, supporting both fixed and removable prosthetic scenarios. The patient could preview functional and esthetic outcomes before treatment initiation.</p><p><strong>Conclusions: </strong>This approach improves treatment predictability, supports interdisciplinary collaboration, and reduces reliance on conventional methods. It enhances personalized prosthodontic planning, streamlines communication between clinician, technician, and patient, and shortens chairside time-aligning with the growing demand for patient-centered care.</p><p><strong>Clinical significance: </strong>This proof-of-concept study demonstrates the feasibility of using 4D virtual simulation to visualize soft tissue changes in edentulous patients before treatment. The workflow offers a non-invasive, digital approach that may enhance communication, improve planning accuracy, and support clinical decision-making in full-arch prosthetic rehabilitation.</p>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":" ","pages":"106142"},"PeriodicalIF":5.5,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145251368","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":"How Accurate Is AI in Detecting Marginal Jaw Bone Loss? A Systematic Review and Meta-Analysis.","authors":"Huei-Min Chiang, Karolina Jonzén, Wendy Yi-Ying Wu, Fredrik Öhberg, Maria Garoff, Anna Lövgren, Pernilla Lundberg","doi":"10.1016/j.jdent.2025.106151","DOIUrl":"https://doi.org/10.1016/j.jdent.2025.106151","url":null,"abstract":"<p><strong>Objective: </strong>Detecting marginal jaw bone loss on radiographs is crucial for diagnosing periodontitis but remains difficult and time-consuming. This review evaluated artificial intelligence (AI) accuracy in identifying the alveolar bone crest and estimating bone loss compared with dental professionals. Moreover, we also assessed whether AI models can detect changes in bone levels over time.</p><p><strong>Methods: </strong>We conducted a systematic review in accordance with the PRISMA guidelines, with diagnostic accuracy as the primary outcome. The review protocol was registered in PROSPERO (CRD42024517330). Searches were performed in PubMed, Web of Science, Cochrane, and Scopus up to August 2025. Two independent reviewers screened the articles at the abstract and title levels, and performed full-text and risk-of-bias assessments. A qualitative synthesis was complemented by a random-effects meta-analysis of studies reporting binary classification of marginal bone loss.</p><p><strong>Results: </strong>Sixty-four studies met the inclusion criteria, with 16 included in the meta-analysis. AI models demonstrated promising performance in detecting the alveolar bone crest and showed high diagnostic accuracy for marginal bone loss, with a pooled sensitivity of 92.3%, a specificity of 91.7%, and an AUC of 0.97. However, high heterogeneity and frequent risk of bias were identified. No study evaluated changes in bone levels over time or was performed in a clinical setting.</p><p><strong>Conclusion: </strong>AI holds promise for facilitating diagnostic decision-making in periodontal care. However, its clinical utility remains limited due to methodological issues. Future research should emphasize external validation, diverse datasets, and longitudinal image analysis to better align AI tools with real-world diagnostic needs.</p>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":" ","pages":"106151"},"PeriodicalIF":5.5,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145251354","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":"A scoping review of hydroxyapatite-modified glass ionomer cements used for restorative dentistry.","authors":"Ya Zhang, Yipeng Fu, Kai Chun Li, Manikandan Ekambaram, Ruoxi Dai, Paul R Cooper, Quan-Li Li, May L Mei","doi":"10.1016/j.jdent.2025.106149","DOIUrl":"https://doi.org/10.1016/j.jdent.2025.106149","url":null,"abstract":"<p><strong>Objective: </strong>Glass ionomer cements (GICs) are considered one of the most suitable materials for restoring tooth cavities due to their unique bioactive properties. However, their inherently low mechanical strength limits their use as long-term or load-bearing restorations. Researchers have explored incorporating hydroxyapatite (HA) into GICs to enhance their strength and durability. This study aimed to review GICs modified by different forms of HA and their performance as a dental restorative material.</p><p><strong>Materials and methods: </strong>A structured search strategy using the terms \"glass ionomer cement\" and \"hydroxyapatite\" was applied in PubMed, MEDLINE, and Embase to identify relevant studies published in English. A data-charting form was developed by two researchers to capture the key characteristics of eligible studies for inclusion. Extracted data covered HA forms, test methods, and main findings.</p><p><strong>Results: </strong>The initial search identified 579 articles, and subsequently, 48 articles were included in the final review. The use of HA to modify GICs showed enhancement in mechanical, chemical, and biological properties, particularly in flexural strength and fluoride release. Compressive strength and diametral tensile strength outcomes were variable and influenced by HA proportion, size, morphology, and storage conditions.</p><p><strong>Conclusions: </strong>HA modification shows promise for reinforcing GICs and improving their bioactivity. However, heterogeneous findings highlight the need for standardized methodologies and clinical trials to validate long-term outcomes.</p><p><strong>Clinical significance: </strong>This scoping review provides a valuable overview of HA modified-GICs research. Additionally, it identifies potential research areas that can be investigated further to enhance properties of HA modified-GICs for clinical application.</p>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":" ","pages":"106149"},"PeriodicalIF":5.5,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145238688","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":"Risk factors for implant failure of implant-supported fixed full-arch rehabilitation in edentulous maxillae and mandibles: A 1- to 7-year retrospective study.","authors":"Yunxuan Chen, Rui Pu, Zichun Xia, Ke Yu, Ying Wang, Zhiwei Jiang, Guoli Yang","doi":"10.1016/j.jdent.2025.106146","DOIUrl":"https://doi.org/10.1016/j.jdent.2025.106146","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate the implant failure rates and risk factors for implant-supported fixed full-arch rehabilitation before and after definitive restoration.</p><p><strong>Methods: </strong>This retrospective study assessed patients treated with All-on-4® (5 or 6) implant surgery and immediate loading from January 2018 to April 2024 for inclusion. Patient-, surgery-, and prosthesis-related variables were recorded and analyzed. LASSO regression was used for preliminary variable selection, followed by univariate and multivariate Cox proportional hazards frailty models to identify risk factors for implant failures before and after definitive restoration. Stepwise logistic regression was performed to construct a nomogram predicting implant failure across the entire course.</p><p><strong>Results: </strong>A total of 141 patients with 840 implants were included. Forty-three patients were treated in the maxilla, 70 in the mandible, and 28 in both jaws, with 377 implants placed in maxillae and 463 in mandibles. The 7-year implant failure rate was 4.52%, and the cumulative implant survival rate was 91.9% (95% CI: 88.4%-95.6%). Twenty-one implants failed before definitive restoration and 17 implants failed after definitive restoration. Bone grafting was the independent risk factor before definitive restoration, whereas fewer implants, opposing natural teeth/fixed prostheses, and absence of night guard were independent risk factors after definitive restoration. The nomogram incorporated six predictors associated with implant failure throughout the treatment course (AUC = 0.787).</p><p><strong>Conclusions: </strong>Four to six implants-supported fixed full-arch rehabilitation is a predictable treatment. Grafted implant sites are more prone to failure before definitive restoration, whereas fewer implants, opposing natural teeth/fixed prostheses, and absence of night guard are related to implant loss after definitive restoration.</p><p><strong>Clinical significance: </strong>Within the limitations of this study, stage-specific risk factors were identified, which may inform clinical decision-making.</p>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":" ","pages":"106146"},"PeriodicalIF":5.5,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145232557","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":"Ultrastructural investigation of pellicle modification by statherin-derived peptide associated with epigallocatechin-3-gallate to prevent dental erosion: in situ proof-of-concept.","authors":"Lethycia Almeida Santos, João Victor Frazão Câmara, Vanessa Schmitt, Jessica Schmitt-Bennewart, Carolina Ruis Ferrari, Naiara Maia Pereira, Reinaldo Marchetto, Marília Afonso Rabelo Buzalaf, Simone Trautmann, Matthias Hannig","doi":"10.1016/j.jdent.2025.106148","DOIUrl":"https://doi.org/10.1016/j.jdent.2025.106148","url":null,"abstract":"<p><strong>Objective: </strong>This ultrastructural study aimed at exploring whether rinsing with epigallocatechin-3-gallate (EGCG) combined with statherin-derived peptide (StN15pSpS) increases acquired enamel pellicle (AEP) protectivity against dental erosion.</p><p><strong>Material and methods: </strong>in situ-AEP was formed by three volunteers using bovine enamel specimens fixed to individual acrylic splints. After 3 minutes of intraoral exposure, volunteers rinsed for 1 minute with 10 mL of one of the following solutions: (1) deionized water (negative control), (2) 0.46 mg/mL EGCG, or (3) 0.46 mg/mL EGCG combined with 1.88 × 10⁻⁵ M StN15pSpS. Enamel samples were collected after 3 minutes and subsequently exposed to either 1% citric acid (pH 2.5) or 0.01 M HCl (pH 2.0) for 10 seconds. The ultrastructure of the enamel surface was analyzed by transmission electron microscopy (TEM).</p><p><strong>Results: </strong>Despite an inter-individual variability in pellicle ultrastructure, the results suggest qualitatively a protective potential of the EGCG-StN15pSpS combination against acidic attack. TEM revealed that rinsing with EGCG and StN15pSpS increased pellicle thickness and electron density, protecting enamel against citric and hydrochloric acid challenges. Compared to controls, pellicles showed reduced disintegration, minor erosion, and overall enhanced structural stability.</p><p><strong>Conclusions: </strong>The data point to a synergistic effect of polyphenol-containing EGCG with StN15pSpS and suggest this combination as promising mouth rinsing component with protective capacity against dental erosion.</p><p><strong>Clinical significance: </strong>Combining EGCG with the statherin-derived peptide StN15pSpS may enhance the acquired enamel pellicle's resistance to acidic erosion. This suggests potential for developing protective mouthrinses to reduce dental erosion risk.</p>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":" ","pages":"106148"},"PeriodicalIF":5.5,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145232561","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":"Bioactive resin composite with the potential of ion exchange following selective carious lesion removal -A laboratory-based study.","authors":"Hanan Ahmad, David Mills, Graham Davis, Aylin Baysan","doi":"10.1016/j.jdent.2025.106144","DOIUrl":"https://doi.org/10.1016/j.jdent.2025.106144","url":null,"abstract":"<p><strong>Objectives: </strong>This laboratory-based study aimed to assess the possible ion exchange within residual leathery dentine using a bioactive UDMA-based resin composite.</p><p><strong>Materials and methods: </strong>A total of 45 extracted teeth with deep carious lesions were assessed using the International Caries Risk and Assessment System (ICDAS). After radiographical evaluation, six teeth (ICDAS 4-5) were subsequently selected. After randomisation of the samples into three groups, the carious lesion was removed, leaving a layer of leathery dentine. The samples in the test group were restored with UDMA-based resin composite (Cention Forte, Ivoclar Vivadent, Liechtenstein), whilst the sculptable resin composite (Tetric Prime, Ivoclar Vivadent, Liechtenstein) was used for the positive control group. In contrast, the negative control group received no treatment. Each sample was stored in simulated body fluid (SBF). The 3D non-destructive X-ray microtomography (XMT) subtraction methodology, scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) were employed at different stages to assess the samples. XMT scans were carried out immediately following the placement of restorations, and after three weeks and three months. At the end of the study, the surface topography and composition were analysed with SEM/EDX.</p><p><strong>Results: </strong>The quantitative analyses at these time points revealed an increase in Linear Attenuation Coefficient (LAC) (related to mineral density) following the placement of restoration in one test tooth. However, the other samples failed to show any evidence of ion exchange within the residual dentine. The SEM and EDX analyses showed that the UDMA-based resin composite released ions and formed an apatite-like phase after three months in the same test tooth.</p><p><strong>Conclusion: </strong>After a three-month laboratory-based study, the bioactive resin composite demonstrated evidence of slight exchange of mineral ions within remaining carious lesions following the selective carious lesion removal in only one test tooth. Notably, an 'apatite-like' phase was formed after immersion in SBF in the same tooth.</p><p><strong>Clinical significance: </strong>The integration of bioactive glass represents a significant innovation in dental restorative materials. The use of bioactive resin composites not only restores the tooth structure but also potentially inhibits further demineralisation and promotes remineralisation following the selective carious lesion removal.</p>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":" ","pages":"106144"},"PeriodicalIF":5.5,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145228621","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":"Comparison of the accuracy of static and dynamic computer-assisted implant surgery in extraction sockets, encased healed sites, and distal extension: an in vitro study.","authors":"Thibaut Marceron, Abhishek Kumar, Anastasios Grigoriadis, Philippe Campan, Cathy Nabet, Antoine Galibourg","doi":"10.1016/j.jdent.2025.105985","DOIUrl":"10.1016/j.jdent.2025.105985","url":null,"abstract":"<p><strong>Objectives: </strong>This study compared the accuracy of static and dynamic computer-assisted implant surgery (CAIS) by measuring the magnitudes and directions of coronal, apical, and angular deviations across three experimental scenarios.</p><p><strong>Methods: </strong>An in vitro study was conducted on 33 maxillary models per group, using static (s-CAIS) or dynamic CAIS (d-CAIS). Each model included three experimental conditions: Extraction Socket (#21), Encased Healed Site (#23), and Distal Healed Site (#26). A total of 198 implants were placed (3 per model). Postoperative deviations were assessed using 3D superimposition. Three-way ANOVA compared deviation magnitudes; directional deviations were analysed using Student's t-test or Wilcoxon test.</p><p><strong>Results: </strong>d-CAIS demonstrated significantly higher accuracy than s-CAIS. Mean 3D deviations for s-CAIS versus d-CAIS were 0.74 ± 0.32 mm compared to 0.65 ± 0.33 mm at the platform, 1.33 ± 0.54 mm versus 0.69 ± 0.37 mm at the apex, and 3.45 ± 1.14° versus 1.27 ± 1.05° angularly. The Extraction Socket Site showed the largest deviations for both systems (p < 0.001). For the Distal Healed Site, d-CAIS exhibited significantly higher accuracy than s-CAIS (p < 0.001). Platform deviation showed no significant difference between techniques (p = 0.44). Directional analysis revealed consistent buccal deviations in extraction sockets for both systems and vestibular-mesial-apical deviation for s-CAIS in distal sites.</p><p><strong>Conclusions: </strong>The current in vitro study indicated that d-CAIS exhibited superior accuracy to static s-CAIS across all tested conditions. While both techniques remained within clinically acceptable deviation thresholds, anatomical challenges, particularly in extraction sockets and distal regions, significantly influenced the magnitude and direction of deviations.</p><p><strong>Clinical significance: </strong>In this in vitro setting, both static and dynamic CAIS achieved deviations within clinically acceptable limits, supporting their reliability in clinical practice. Extraction sockets represented the most challenging sites for both systems. In distal sites, the directional deviations observed with s-CAIS indicated a bending effect of the cantilevered guide, emphasising the need for improved distal support or reinforcement.</p>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":" ","pages":"105985"},"PeriodicalIF":5.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144667726","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":"Posterior partial crowns out of lithium disilicate with or without posts: A randomized controlled study at 9 years follow up.","authors":"Edoardo Ferrari Cagidiaco, Giulia Verniani, Denise Irene Karin Pontoriero, Ovidiu Ionut Saracutu, Daniele Manfredini, Marco Ferrari","doi":"10.1016/j.jdent.2025.106005","DOIUrl":"10.1016/j.jdent.2025.106005","url":null,"abstract":"<p><strong>Objective: </strong>These randomized controlled clinical aims to evaluate the long-term clinical performance of posterior lithium disilicate partial crowns used to restore endodontically treated teeth (ETT), with or without fiber post placement, over a 9-year period in patients who did not report any bruxism activities at baseline.</p><p><strong>Materials and methods: </strong>Participants were recruited at the University of Siena, Siena, Italy. Patient were≥18 years, in need for one partial crown on posterior teeth (molars and premolars) following endodontic treatment and with at least 50 % of the coronal structure remaining. Patients were randomly assigned to two groups: Group 1 received fiber posts for abutment build-up, and Group 2 did not. Lithium disilicate partial crowns were fabricated and adhesively cemented for both groups. Clinical and radiographic evaluations were conducted at baseline, 1, 2, 3, and 9 years. Failures were defined as post debonding/fracture, root fracture, crown dislodgement/fracture, or the presence of periapical lesion. Cox regression analysis was used to assess the influence of post placement and tooth type.</p><p><strong>Results: </strong>A total of 120 patients were enrolled. At the 9-year follow-up, survival of ETT ranged between 88.8 % in molars without post and to 85.7 % in premolars with no post. No statistically significant difference was observed regarding post placement or tooth type on failure rates (p > .05).</p><p><strong>Conclusion: </strong>The findings of the present clinical trial support the idea in patients with no report of bruxism, the insertion of a fiber post for the reconstruction of endodontically treated teeth with partial crown lithium disilicate in posterior teeth is not a necessary procedure.</p><p><strong>Clinical significance: </strong>When at least 50 % of coronal structure is maintained, fiber post placement does not significantly influence survival rates. Lithium disilicate partial crowns provide excellent long-term outcomes in restoring endodontically treated posterior teeth.</p>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":" ","pages":"106005"},"PeriodicalIF":5.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144753530","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":"GINGIVAL COLOR IN DENTISTRY: A SYSTEMATIC REVIEW.","authors":"Manuel Antonio Sanchez de Martín, Beatriz Párdal Peláez, Adrian Curto, Cristina Gómez-Polo","doi":"10.1016/j.jdent.2025.106143","DOIUrl":"https://doi.org/10.1016/j.jdent.2025.106143","url":null,"abstract":"<p><strong>Objectives: </strong>To synthesize the available knowledge on gingival color and its relevance to aesthetics.</p><p><strong>Data: </strong>This systematic review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines.</p><p><strong>Sources: </strong>An electronic search was conducted in the Web of Science database using the keywords: gingivae, color, aesthetic, and their combinations. Only English-language articles published between 2014 and November 2024 were included.</p><p><strong>Study selection: </strong>The search strategy followed these steps: ALL=(gingival) OR ALL=(gingiva);ALL=(colour) OR ALL=(color);ALL=(esthetic) OR ALL=(aesthetic); Finally, the combined search was #1 AND #2 AND #3. Opinion articles, books, clinical cases, and prospective or retrospective studies were excluded. From an initial database of 275 results, and after applying exclusion criteria and full-text review by the authors, 21 studies were included.</p><p><strong>Conclusions: </strong>Gingival color remains underexplored, with insufficient literature to draw robust conclusions. Recording, communicating, and reproducing gingival color is inherently complex. No studies to date have quantified gingival color changes in longitudinal designs. Some publications have highlighted chromatic discrepancies between natural gingiva, restorative materials, and even between similarly named gingival materials. Nearly all available studies are cross-sectional, limiting understanding of gingival color evolution over time. Multicenter longitudinal studies are needed, using representative populations of various racial backgrounds and standardized spectrophotometric protocols.</p><p><strong>Clinical significance: </strong>Despite advances over the past decade, studies addressing gingival color show a high degree of heterogeneity, both in vivo and in vitro, making direct comparisons difficult. Additionally, the lack of standardized methodologies in terms of measurement areas, racial and demographic characteristics, devices, inclusion criteria, and material diversity has left gingival color as an underexplored and poorly understood phenomenon. Coordinated efforts between manufacturers, commercial entities, and researchers are essential to generate reliable and clinically relevant knowledge for gingival restoration.</p>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":" ","pages":"106143"},"PeriodicalIF":5.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145225399","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}