Journal of dentistry最新文献

{"title":"3D-printed resins intended for long-term restoration vs. conventionally used materials: A systematic review and network meta-analysis of in vitro studies","authors":"Eddy Jhonny Alvarez Lalvay ,&nbsp;Fabíola Galbiatti de Carvalho ,&nbsp;Antoni Raupp da Silva ,&nbsp;Francisco Amaro Cruz Morganti ,&nbsp;Fabrício Mezzomo Collares ,&nbsp;Eliseu Aldrighi Münchow","doi":"10.1016/j.jdent.2026.106531","DOIUrl":"10.1016/j.jdent.2026.106531","url":null,"abstract":"<div><h3>Objectives</h3><div>This systematic review with network meta-analysis (NMA) evaluated whether three-dimensional (3D) printed resin-based composites (RBCs) intended for long-term dental restorations perform similarly or superiorly to conventional restorative materials.</div></div><div><h3>Data sources</h3><div>The review followed the PRISMA extension for NMA. Six electronic databases were searched up to November 2025.</div></div><div><h3>Study selection</h3><div><em>In vitro</em> studies assessing at least one commercially available 3D-printed RBC for long-term dental restorations and at least one conventional restorative material were eligible. Methodological quality was assessed using the RoBDEMAT tool, and data were synthesized using Bayesian NMA.</div></div><div><h3>Results</h3><div>From 2299 records, 50 studies met the inclusion criteria, of which 40 were included in the meta-analyses. Across mechanical, physical, reproducibility, and optical outcomes, 3D-printed RBCs generally performed similarly to or worse than most conventional materials. However, they demonstrated superior marginal and internal fit compared with glass ceramics, polymer-infiltrated ceramic networks, and polymeric restoratives, except when compared with direct RBCs, indicating enhanced dimensional accuracy.</div></div><div><h3>Conclusions</h3><div>Although 3D printing achieved superior trueness and internal/marginal fit relative to most conventional restorative materials, the inferior mechanical performance, suboptimal microstructural characteristics, and limited optical stability of 3D-printed resins underscore the need for improvements in material formulation, post-curing strategies, and finishing and polishing protocols.</div></div><div><h3>Clinical significance</h3><div>At present, 3D-printed resins for long-term single-unit restorations do not yet match the overall performance of established conventional restorative systems.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106531"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146105614","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 pilot study on professional cleansing protocols for PMMA resins produced by CAD/CAM and 3D printing technologies: Effects on surface roughness and color stability","authors":"Martina Bonvicini ,&nbsp;Davide Silvestri ,&nbsp;Antonio Arena ,&nbsp;Francesca Zicari ,&nbsp;Adolfo Di Fiore ,&nbsp;Luca Bortolotti ,&nbsp;Luca Lusvarghi ,&nbsp;Carlo Monaco","doi":"10.1016/j.jdent.2026.106535","DOIUrl":"10.1016/j.jdent.2026.106535","url":null,"abstract":"<div><h3>Objectives</h3><div>This in vitro pilot study evaluated the effects of two professional cleansing protocols on surface roughness and color stability of various resins for complete dentures.</div></div><div><h3>Methods</h3><div>50 resin specimens were prepared and divided into five groups (n = 10): Probase Hot (PH, Ivoclar AG), IvoBase CAD (IBC, Ivoclar AG), Ivotion Dent (ID, Ivoclar AG), Dima Print Denture Base (DPDB, Kulzer), and Dima Print Denture Teeth (DPDT, Kulzer). After a 7-day immersion in coffee solution, two cleansing protocols were applied: a chemical one using an alkaline solution, and a combined mechanical+chemical one involving an acid-based cleaning agent with a rotating needle device followed by the same chemical protocol. Surface roughness was measured before and after cleaning using a structured light profilometer (Confovis) connected to a microscope (Eclipse LV150N, Nikon). Color stability was assessed with a colorimeter (Easy_Color, SmartVision). One specimen per group underwent SEM analysis at baseline and after both protocols. The data analysis was performed by using Kruskal-Wallis test and post-hoc Dunn test for comparison.</div></div><div><h3>Results</h3><div>Surface roughness was not significantly affected by either protocol (p&gt;0.05). All ΔE values were below the perceptibility threshold (ΔE&lt;1.2), except for ID after both the chemical (ΔE = 2.28) and the mechanical+chemical protocol (ΔE = 2.39) and DPDB after both the chemical (ΔE = 2.06) and the mechanical+chemical protocol (ΔE = 2.33).</div></div><div><h3>Conclusions</h3><div>Surface roughness and color stability of PMMA resins were not affected by the tested cleansing protocols, so they could be used by clinician during the periodically control visit.</div></div><div><h3>Clinical Significance</h3><div>The proposed cleansing protocols help preserve the long-term aesthetic and functional integrity of dentures, enhancing patient satisfaction and oral health.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106535"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146105549","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 and antibacterial universal adhesives containing ZnO/Cu and bioactive glass nanoparticles","authors":"Carolina Pardo-Díaz ,&nbsp;Gabriel Cochinski ,&nbsp;Pedro Moreira ,&nbsp;Fabio Dupart Nascimento ,&nbsp;Marina Damasceno e Souza Chiari ,&nbsp;Joatan Lucas de Sousa Gomes Costa ,&nbsp;Cristian Covarrubias ,&nbsp;Mario Felipe Gutiérrez ,&nbsp;Alessandro D. Loguercio ,&nbsp;Eduardo Fernández","doi":"10.1016/j.jdent.2026.106524","DOIUrl":"10.1016/j.jdent.2026.106524","url":null,"abstract":"<div><h3>Objectives</h3><div>To evaluate the antibacterial activity, cytocompatibility, mineralizing potential, degree of conversion (DC), enzymatic activity, and resin–dentin microtensile bond strength (μTBS) of a universal adhesive modified with zinc oxide (ZnO), copper (Cu), and bioactive glass (BG) nanoparticles.</div></div><div><h3>Methods</h3><div>Five adhesive formulations were evaluated: control (0 wt %); ZnO/Cu (0.2 wt % Cu + 2.5 wt % ZnO); 5 wt %BG + ZnO/Cu; 10 wt %BG + ZnO/Cu; and 10 wt %BG. Antibacterial activity against Streptococcus mutans was quantified by colony-forming unit counts. Cytocompatibility was assessed using human gingival stem cells (MTS assay, 3 and 7 days). Mineralization was evaluated after immersion in simulated body fluid (7 and 28 days) via FE-SEM and EDX. The DC was measured by Raman spectroscopy. Resin–dentin μTBS was tested under self-etch (SE) and etch-and-rinse (ER) strategies. MMPs activity was assessed by in situ zymography. Data were analyzed with ANOVA and Tukey tests (α = 0.05).</div></div><div><h3>Results</h3><div>BG nanoparticles significantly enhanced antibacterial and mineralizing responses. The 10 wt %BG and 10 wt %BG + ZnO/Cu groups achieved &gt;80 % bacterial inhibition and marked Ca–P deposition after 28 days. All adhesives exhibited cytocompatibility (&gt;80 % viability) and DC values &gt;60 %. A slight reduction in μTBS was observed for 10 wt %BG groups under the ER strategy. High gelatinolytic activity was detected across all groups, with reduced fluorescence only for the ZnO /Cu group under ER strategy.</div></div><div><h3>Conclusions</h3><div>Incorporating BG nanoparticles into a ZnO/Cu-modified universal adhesive improved antibacterial and mineralizing properties without impairing cytocompatibility, polymerization, without critically compromising bond strength. MMP activity varied with bonding strategies, with no consistent inhibitory effect observed.</div></div><div><h3>Clinical Relevance</h3><div>Universal adhesives modified with bioactive glass and ZnO/Cu nanoparticles exhibited enhanced antibacterial and mineralizing properties while maintaining cytocompatibility and degree of conversion, without critically compromising bond strength. Although, no immediate inhibition of MMP activity was observed, this multifunctional approach may contribute to more stable adhesive interfaces and improved long-term performance of composite restorations.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106524"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146157294","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":"Effects of cigarette smoke and Tobacco Heating System aerosol on discoloration and staining of ceramic and composite veneers","authors":"Qirong Huang ,&nbsp;Xiaoyi Zhao ,&nbsp;Shoaib Majeed ,&nbsp;Sophie Scheuner ,&nbsp;Caroline Favre ,&nbsp;Sandra Ferreira ,&nbsp;Filippo Zanetti ,&nbsp;Giuseppe Lo Sasso ,&nbsp;Yanfang Ren","doi":"10.1016/j.jdent.2026.106543","DOIUrl":"10.1016/j.jdent.2026.106543","url":null,"abstract":"<div><h3>Objectives</h3><div>To compare the effects of conventional cigarette smoke (CS) and Tobacco Heating System (THS) aerosol on surface staining and discoloration of ceramic and composite veneers using a clinically relevant <em>in vitro</em> model. Methods: Forty-six human premolars were restored with either lithium-disilicate ceramic or direct composite veneers and assembled in an <em>in vitro</em> setup model simulating adjacent teeth and gingiva. Specimens were randomly assigned to a 3-week exposure to CS or THS aerosol. Following each daily exposure, specimens were brushed with a standard toothpaste. Color change (ΔE00) and whiteness index for dentistry (WID) were measured spectrophotometrically at baseline and weeks 1, 2, and 3 after exposure. Surface staining was scored in the gingival, mesial, distal, and body areas using a modified Lobene stain index, and cervical marginal discoloration was evaluated with modified USPHS criteria. Results: Composite veneers exposed to CS showed significantly more post-brushing discoloration (ΔE00≈ 4.0; ΔWID≈ –7.2) than ceramic veneers. THS exposure caused minimal color change in both veneer types. Surface staining was consistently greater after CS than THS exposure, but accumulated over time, even with THS, especially at interproximal and gingival regions. Cervical marginal discoloration was significantly higher in CS-exposed specimens for both veneer types. Conclusions: Cigarette smoke leads to composite veneer discoloration exceeding the clinically perceptible threshold (ΔE00 &gt; 2.25) and more severe marginal and interproximal staining than THS aerosol. When routine brushing was included, ceramic veneers showed high color stability under both exposures. Although THS induces less veneer discoloration than CS, meticulous interdental hygiene and smoking cessation remain critical for maintaining optimal esthetics. Clinical significance statement: Cigarette smoking leads to discoloration and marginal staining of composite veneers, even with regular brushing, whereas ceramic veneers offer greater color stability. Although heated tobacco aerosol causes less staining than cigarette smoke, both can impact interproximal areas. This highlights the importance of materials selection, hygiene instructions, and smoking cessation counseling.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106543"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146119045","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":"Continuous maternal care of oral diseases from preconception to lactation","authors":"Qi-Yun Yin ,&nbsp;Jia Liang ,&nbsp;Fang Wang","doi":"10.1016/j.jdent.2026.106555","DOIUrl":"10.1016/j.jdent.2026.106555","url":null,"abstract":"<div><h3>Introduction/Objective</h3><div>Preconception-to-lactation oral care lacks universal standardized protocols, and the rising prevalence of pregnancy-related oral diseases demands safe, effective clinical guidelines. This study analyzed relevant literature to explore oral care strategies for women in this period.</div></div><div><h3>Data/Sources</h3><div>A literature search was conducted in PubMed and Web of Science up to December 2025 using keywords including “perinatal”, “pregnancy” and terms related to oral/dental diseases. The findings indicate that periodontal infections, pulp-involved caries and third molar pericoronitis are common oral diseases in women from preconception to lactation, with periodontitis and acute pulpitis linked to adverse pregnancy outcomes. Clinical management of oral diseases during this period must adhere to the core principles of safety, necessity, comfort, and multidisciplinary collaboration, with the second trimester being the optimal window for elective dental procedures. Dental imaging examinations are safe with lead shielding, as the radiation dose is far below the established safety threshold. Medications should prioritize low-risk options (e.g., lidocaine, amoxicillin) in accordance with FDA classification and the Pregnancy and Lactation Labeling Rule. Clinically recommended safe therapeutic approaches include basic periodontal treatment, chemomechanical minimally invasive caries excavation, and restoration with resin or glass ionomer cements. Comprehensive preconception oral examinations, standardized prenatal oral hygiene and avoiding unnecessary invasive procedures/high-risk drugs are key to protecting maternal and fetal health.</div></div><div><h3>Conclusions</h3><div>Women from preconception to lactation face common oral diseases linked to adverse pregnancy outcomes; second-trimester elective dental care is optimal, with safe imaging, low-risk meds and preconception exams key for maternal-fetal health.</div></div><div><h3>Clinical Significance</h3><div>Perinatal oral disease management safeguards maternal-fetal health by following safety-core principles, adopting evidence-based safe diagnostics/therapies and prioritizing preconception screening &amp; prenatal preventive oral care.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106555"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146132095","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":"Assessment of patient satisfaction and esthetic outcomes following treatment of post-orthodontic white spot lesions using a bioactive adhesive and resin infiltrant: a randomized split-mouth clinical trial","authors":"Zakereyya S.M. Albashaireh,&nbsp;Malak K. Altallaq","doi":"10.1016/j.jdent.2026.106565","DOIUrl":"10.1016/j.jdent.2026.106565","url":null,"abstract":"<div><h3>Objectives</h3><div>This study compared the esthetic performance of a conventional resin infiltrant and a bioactive adhesive in the management of white spot lesions (WSLs) as assessed by patient and clinician satisfaction.</div></div><div><h3>Methods</h3><div>In this split-mouth randomized clinical trial, 20 patients with anterior WSLs were enrolled. Lesions in one quadrant received ICON resin infiltration, the contralateral quadrant received a bioactive adhesive (Hi-Bond Universal) following surface conditioning with 15 % hydrochloric acid. At the one-month follow-up, patients and two calibrated clinicians independently assessed esthetic changes. With 20 evaluations per quadrant, this resulted in 40 patient evaluations and 80 clinician evaluations, 40 per each clinical assessor. Evaluations were performed using a 100 mm visual analog scale (VAS), with scores categorized into 5 levels and then dichotomized into 'satisfactory' and 'unsatisfactory' outcomes as pre-specified in the study protocol.</div></div><div><h3>Results</h3><div>Both treatments effectively masked WSLs. Patients reported an identical satisfaction rate of 80 % for both materials (<em>p</em> &gt; .999). Clinicians also found no significant difference between the treatment materials (<em>p</em> = .344). Inter-assessor agreement was fair for both groups (κ = 0.318–0.340), with statistically significant agreement in the ICON group, (<em>p</em> = .043).</div></div><div><h3>Conclusions</h3><div>Both the conventional resin infiltrant and the bioactive adhesive achieved favorable esthetic outcomes. While clinicians consistently provided more critical ratings than patients, no statistically significant differences were detected between the two treatment protocols. The findings suggest that bioactive adhesives are a viable alternative option for the initial management of white spot lesions.</div></div><div><h3>Clinical significance</h3><div>A bioactive adhesive combined with 15 % HCl pretreatment provides effective masking of post-orthodontic WSLs. At one month, this protocol achieved patient and clinician satisfaction results that did not differ significantly from those of specialized resin infiltration, suggesting its utility as a practical alternative in clinical practice.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106565"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146149477","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":"Comparative impact of manual and electric toothbrushing on acid-eroded enamel","authors":"S.P. Jadeja,&nbsp;R.S. Austin,&nbsp;D. Bartlett","doi":"10.1016/j.jdent.2026.106558","DOIUrl":"10.1016/j.jdent.2026.106558","url":null,"abstract":"<div><h3>Objective</h3><div>To evaluate and compare the enamel wear resulting from manual and electric toothbrushing following acid erosion, using natural human enamel specimens. The study aimed to quantify both surface tissue loss and subsurface prism alterations.</div></div><div><h3>Methods</h3><div>Twenty-four caries-free extracted human molars were decoronated and sectioned to expose natural buccal enamel surfaces. Samples were divided into two groups (manual vs electric) and subjected to four cycles of citric acid erosion (pH 2.7) followed by controlled brushing (30 strokes per cycle, total 120) using a non-fluoridated toothpaste slurry. Brushing force was standardised to 290–295g. Step height changes were measured via non-contact laser profilometry, and enamel prism alterations were assessed using scanning electron microscopy (SEM). Statistical analysis was performed using Shapiro–Wilk test (normality), two-way ANOVA, and Bonferroni's post hoc test (α = 0.05).</div></div><div><h3>Results</h3><div>Electric toothbrushes caused significantly greater enamel wear compared to manual brushes across all erosion-abrasion intervals (p &lt; 0.0001). Mean step height increased from 1.38(0.42) µm to 3.65(0.39) µm for manual brushing and from 1.71(0.22) µm to 5.13(0.28) µm for electric brushing. SEM revealed deeper subsurface prism deformation (30–50 µm) in manual samples, whereas electric samples exhibited shallower changes (10–15 µm) with a ∼10 µm interface gap.</div></div><div><h3>Conclusion</h3><div>Electric toothbrushes resulted in significantly more surface enamel loss on acid-eroded natural teeth compared to manual toothbrushes. The nature of subsurface changes differed by brushing mode, with implications for the mechanical impact of brush types on compromised enamel.</div></div><div><h3>Clinical Significance</h3><div>Brushing technique and toothbrush type influence the extent of enamel wear on eroded surfaces. These findings underscore the importance of tailored oral hygiene advice, particularly for individuals with dietary acid exposure or early signs of erosion.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106558"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146137546","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":"Antibacterial and mineralising properties of silver complex fluoride on enamel 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.2026.106534","DOIUrl":"10.1016/j.jdent.2026.106534","url":null,"abstract":"<div><h3>Objective</h3><div>This study aimed to investigate the antibacterial and mineralising effects of silver complex fluoride (SCF) on enamel.</div></div><div><h3>Methods</h3><div>Sound human enamel blocks were prepared and subjected to Streptococcus mutans–induced demineralisation to create artificial caries. Blocks were treated with SCF, 38% silver diamine fluoride (SDF), or deionised water and underwent a 21-day pH-cycling. Biofilm morphology, viability, and quantification were analysed using scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM), and colony-forming unit (CFU) counting. Remineralisation effects were assessed by SEM, micro-computed tomography (micro-CT), Knoop microhardness, and X-ray diffraction (XRD).</div></div><div><h3>Results</h3><div>SEM images showed dense bacterial biofilm on water-treated enamel, but minimal growth on SCF- or SDF-treated surfaces. CLSM indicated higher dead/live cell ratios in SCF (0.75 ± 0.22) and SDF (0.83 ± 0.25) groups than water (0.43 ± 0.22; p &lt; 0.001). Log CFU values for SCF, SDF, and water were 6.90 ± 0.09, 6.74 ± 0.23, and 7.78 ± 0.13, respectively (p &lt; 0.001, SCF, SDF &lt; Water). Lesion depths (μm) were 91 ± 36, 89 ± 24, and 186 ± 34 (p &lt; 0.001; SCF, SDF &lt; Water), while mineral loss (gHA pcm⁻³) was 0.43 ± 0.13, 0.40 ± 0.14, and 1.32 ± 0.21 (p &lt; 0.001; SCF, SDF &lt; Water) for SCF, SDF, and water, respectively. Knoop hardness was significantly higher in SCF (70 ± 2) and SDF (72 ± 7) than water (25 ± 6; p &lt; 0.05). XRD confirmed well-crystallised hydroxyapatite in SCF- and SDF-treated enamel but not in water-treated samples.</div></div><div><h3>Conclusion</h3><div>SCF demonstrates antibacterial and mineralising properties comparable to SDF.</div></div><div><h3>Clinical significance</h3><div>Adoption of SCF may expand silver-based caries prevention by improving patient acceptance without compromising appearance.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106534"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146105633","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":"Feasibility and accuracy of a partial point cloud registration method for transoral robot-assisted surgery of zygoma fracture: A phantom study","authors":"Hangyu Liu ,&nbsp;Bimeng Jie ,&nbsp;Chunheng Lu ,&nbsp;Haoliang Chen ,&nbsp;Junchen Wang ,&nbsp;Yang He","doi":"10.1016/j.jdent.2026.106533","DOIUrl":"10.1016/j.jdent.2026.106533","url":null,"abstract":"<div><h3>Objectives</h3><div>To propose a novel registration method based on partial point cloud registration for transoral robot-assisted zygoma fracture surgery and validate its accuracy via a phantom study.</div></div><div><h3>Methods</h3><div>This study comprised two validation phases. 1) Feasibility of partial zygomatic surface point cloud registration. Forty sets of normal CT data were selected from an established normative database. After segmentation and 3D reconstruction of zygoma, point clouds from different exposure ranges on the zygomatic bone surface (Group A: Full Zygomatic Bone Outer Surface; Group B: Area Below Infraorbital Margin; and Group C: Area Below Infraorbital Foramen.) were extracted and registered to the intact zygoma using the Iterative Closest Point (ICP) algorithm. The Fiducial Registration Error (FRE) was computed for each group. 2) Accuracy of partial point cloud registration: 10 pre-operative CT scans of zygomatic fractures were selected. Registration using fiducial markers served as the control (Group A). Using a self-developed and previously validated binocular vision camera and probe, point clouds of different exposure range (Group B1, B2, and B3) on the zygomatic bone surface were collected and registered using ICP algorithm. The accuracy of partial point cloud registration for different zygomatic bone surface areas was comparatively evaluated using both FRE and Target Registration Error (TRE).</div></div><div><h3>Results</h3><div>Feasibility of partial zygomatic surface point cloud registration: The FRE for Group A, B, and C was 0.16 ± 0.16 mm, 0.18 ± 0.14 mm and 0.22 ± 0.13 mm (<em>P</em> &gt; 0.05). Accuracy of partial point cloud registration: The TRE for Group A, B1, B2, and B3 was 0.47 ± 0.17 mm, 0.70 ± 0.17 mm, 0.70 ± 0.17 mm, 0.86 ± 0.24 mm. (<em>P</em> &lt; 0.001)</div></div><div><h3>Conclusion</h3><div>The proposed method, based on partial point cloud registration, demonstrated both accuracy and feasibility, offering a foundation for future advancements in transoral robot-assisted surgery of zygoma fracture.</div></div><div><h3>Clinical significance</h3><div>For transoral robotic-assisted zygoma reduction, the most crucial part is to enable the robot to accurately localize bone fragments following limited surgical exposure. The innovative registration approach based on partial point cloud registration has been proven to possess both accuracy and feasibility, which lays a solid foundation for the future development of transoral robot-assisted surgical techniques in the treatment of zygomatic fractures.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106533"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146113371","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 validation of an automated zygomatic implant planning system: An international multicenter study","authors":"Wenying Wang ,&nbsp;Haitao Li ,&nbsp;Feng Wang ,&nbsp;James Chow ,&nbsp;Rubén Davó ,&nbsp;Xiaojun Chen ,&nbsp;Baoxin Tao ,&nbsp;Yiqun Wu","doi":"10.1016/j.jdent.2026.106532","DOIUrl":"10.1016/j.jdent.2026.106532","url":null,"abstract":"<div><h3>Objective</h3><div>To validate the performance of a novel automated zygomatic implant (ZI) planning tool (Zygoplanner) in an international multicenter cohort.</div></div><div><h3>Methods</h3><div>Preoperative computed tomography (CT) scans from 69 patients (276 ZIs) who underwent quad zygomatic implant surgery were retrospectively analyzed using Zygoplanner. Automated ZI plans generated by Zygoplanner were compared with the corresponding clinically placed implants. The comparison metrics included three-dimensional bone-to-implant contact (3D-BIC), Zygoma Anatomy-Guided Approach (ZAGA) classification, safety distances to the orbital rim and the inferior border of the zygoma, inter-implant spacing, surgeon subjective assessments, and a blinded Turing test.</div></div><div><h3>Results</h3><div>Compared with clinically-proved manual plans, Zygoplanner-based automated ZI plans achieved significantly higher 3D-BIC values (<em>p</em> &lt; 0.001). In the internal dataset, automated plans showed slightly shorter orbital rim distances (4.51 vs 5.71 mm, <em>p</em> = 0.022) but significantly greater distances to the inferior zygomatic border (8.21 vs 7.20 mm, <em>p</em> = 0.015). In the external dataset, Zygoplanner demonstrated significantly larger inter-implant spacing (3.01 vs 1.18 mm, <em>p</em> &lt; 0.001). Despite these differences, ZAGA classifications remained consistent between both groups. Subjective evaluations by experienced surgeons yielded high scores for stability (4.63/5), feasibility (4.51/5), and safety (4.25/5). In the blinded Turing test, Zygoplanner-generated plans were identified as human expert in 65.2 % of cases, significantly exceeds the 50 % random guessing threshold (<em>p</em> = 0.0075).</div></div><div><h3>Conclusion</h3><div>Zygoplanner automatically generates clinically acceptable quad ZI plans with improved 3D-BIC, which effectively reduces the planning complexity and facilitates better preoperative ZI planning.</div></div><div><h3>Clinical Significance</h3><div>Zygoplanner shows strong potential to automate and standardize quad zygomatic implant planning, thereby improving surgical predictability and safety while simplifying the planning workflow. Its automated workflow supports more consistent outcomes and may broaden access to advanced zygomatic implant rehabilitation for patients with edentulous maxillae.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106532"},"PeriodicalIF":5.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146113381","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}