Journal of Esthetic and Restorative Dentistry最新文献

{"title":"Adaptation, Marginal, and Occlusal Quality of Monolithic Zirconia Crowns: Effect of the CAD/CAM Milling Protocol.","authors":"Indiarai Lavandoski Bringhenti, Andressa Restani Oliveira, Natalia Ulmi Ziglioli, Vitor de Trancoso de Britto, Alvaro Della Bona, Marcia Borba","doi":"10.1111/jerd.70181","DOIUrl":"10.1111/jerd.70181","url":null,"abstract":"<p><strong>Objectives: </strong>Variables related to CAD/CAM processing can affect the final quality of all-ceramic crowns. This study aims to evaluate the effect of the milling protocol on the adaptation, marginal and occlusal quality of monolithic zirconia crowns.</p><p><strong>Materials and methods: </strong>Thirty-nine monolithic zirconia crowns were produced using three CAD/CAM milling protocols (n = 13): slow (S), normal (N), and fast (F). Adaptation (gap thickness) was evaluated using the replica technique, while marginal quality was assessed according to a severity scale. Occlusal quality was investigated qualitatively, using a stereomicroscope, and quantitatively, through an occlusal dimensional discrepancy analysis. Gap thickness and occlusal discrepancy data were analyzed with ANOVA and Tukey's test, and marginal quality with Kruskal-Wallis and Student-Newman-Keuls (α = 0.05).</p><p><strong>Results: </strong>Gap thickness in the marginal, gingival-axial angle and axial regions was similar among groups. In the axio-occlusal angle and occlusal region, group N presented the smallest gap. For marginal quality, group F had higher scores in the severity scale than groups N and S for the mesial and buccal regions. Group F crowns showed less refined occlusal anatomy. Yet, when crowns produced with S and F protocols were compared with N, the total mean discrepancy was similar.</p><p><strong>Conclusion: </strong>The CAD/CAM milling protocol affected the adaptation, marginal, and occlusal quality of monolithic zirconia crowns.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":" ","pages":"1840-1847"},"PeriodicalIF":4.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13472039/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147856546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of Different Multilayer Zirconia Materials on the In Vitro Load-Bearing Capacity of Resin-Bonded Fixed Partial Dentures in the Posterior Region.","authors":"Moritz Waldecker, Maria Sophie Heller, Stefan Rues, Peter Rammelsberg, Wolfgang Bömicke","doi":"10.1111/jerd.70191","DOIUrl":"10.1111/jerd.70191","url":null,"abstract":"<p><strong>Objective: </strong>Comparison of the load-bearing capacity and failure pattern of posterior resin-bonded fixed partial dentures (RBFPDs) differing in retainer design, zirconia material, and vertical nesting position.</p><p><strong>Materials and methods: </strong>RBFPDs replacing a maxillary first molar were fabricated with 2 retainer designs (inlay-retained, IR; wing-retained, WR) and of 2 multilayer zirconia materials (3Y-TZP and 5Y-PSZ, 3Y/5Y; 5Y-PSZ, 5Y). For 3Y/5Y blanks, 2 vertical nesting positions (center; top) were evaluated. For each group, 16 monolithic RBFPDs were fabricated. Half of the RBFPDs underwent artificial aging. Load-bearing capacity (F_u) was tested under oblique loading. The data were statistically analyzed using Welch ANOVA and Dunnett-T3 post hoc tests (α = 0.05).</p><p><strong>Results: </strong>No decementations or defects were observed after aging. Mean F_u ranged between 684 and 1216 N for IR-RBFPDs and 1025-1617 N for WR-RBFPDs. There was a clear hierarchy between the subgroups, with the lowest F_u recorded for restorations made of 5Y zirconia and the highest F_u for restorations fabricated from a centric position in 3Y/5Y blanks. Aging had no influence (p ≥ 0.526).</p><p><strong>Conclusions: </strong>Posterior RBFPDs made of multilayer 3Y-TZP/5Y-PSZ zirconia can be recommended for clinical trials. Vertical positioning in the blank influences the safety margin of the load-bearing capacity. The use of 5Y-PSZ should be critically scrutinized for this indication.</p><p><strong>Clinical significance: </strong>Posterior resin-bonded fixed partial dentures made of monolithic zirconia (3Y-TZP) are a valuable treatment option. The opacity of the restorations limits their esthetics. Multilayer zirconia materials with color and/or material gradient can further improve the esthetics of monolithic zirconia restorations. Resin-bonded fixed partial dentures made of multilayer zirconia materials differing in color and/or material gradient might be a viable alternative to restorations made of 3Y-TZP zirconia in the posterior region.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":" ","pages":"1854-1863"},"PeriodicalIF":4.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13471761/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147959764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Occlusal Devices Automatically Designed by Using Different Artificial Intelligence-Based Programs: A Case Report.","authors":"John C Kois, Dean E Kois, Jonathan Zeitler, Marta Revilla-León","doi":"10.1111/jerd.70262","DOIUrl":"https://doi.org/10.1111/jerd.70262","url":null,"abstract":"<p><strong>Objective: </strong>To describe the clinical workflow for obtaining intraoral scans, fabricating occlusal devices using different artificial intelligence (AI)-based programs, and delivering the devices.</p><p><strong>Clinical considerations: </strong>Maxillary and mandibular scans of a completely dentate patient receiving a maxillary occlusal device were obtained using an intraoral scanner (Trios 5). The maxillomandibular relationship was obtained at two different positions: maximum intercuspal position (MIP) and 2-mm interocclusal opening achieved with a leaf gauge. The articulated scans were imported into four AI-based programs (Automate, Medit Night Guards, Relu Mouth Guards, and Sprintray Cloud Design) for automatic occlusal device design. One occlusal device was milled and additively manufactured from each design and subsequently delivered using a standardized protocol.</p><p><strong>Conclusions: </strong>Substantial differences in occlusal device design, fit, and occlusal adjustments were observed among the AI-based programs evaluated. Standardization of intraoral data acquisition and design principles and parameters may be necessary to improve the reliability of AI-based occlusal device design. Further studies are needed to evaluate the accuracy, efficiency, and performance of AI-based programs for occlusal device fabrication.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148874486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optical Properties of Multi-Yttria-Layered Zirconia: Influence of \"High-Speed\" Sintering Protocol.","authors":"Omar S Rahawi, Emad F Alkhalidi, Tariq Alsahafi, Taiseer A Sulaiman","doi":"10.1111/jerd.70186","DOIUrl":"10.1111/jerd.70186","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate the impact of high-speed compared to conventional sintering protocols on the color difference (ΔE ₀₀) and relative translucency (RTP₀₀) of multi-yttria-layered 3Y/5Y-partially stabilized zirconia (PSZ) in various zones (incisal, transition, and core).</p><p><strong>Materials and methods: </strong>Using a 5-axis milling machine (PrograMill PM7), 60 specimens (14 mm diameter × 1 ± 0.1 mm thickness) were made from the incisal, transition, and core zones of multi-yttria-layered 3Y/5Y-PSZ (IPS e.max ZirCAD Prime, Ivoclar Vivadent). Specimens were randomly allocated to conventional sintering (9 h) or speed sintering (15 min) in a programmable furnace (Programat CS6). Using a spectrophotometer (Ci7600, X-Rite), spectral reflectance over black and white backgrounds was measured. The CIEDE2000 formula was used to calculate the color difference (ΔE ₀₀) and RTP₀₀. Data were analyzed via two-way ANOVA and Tukey's post hoc tests (α > 0.05). Perceptibility (PT) and acceptability thresholds (AT) were set at ΔE ₀₀ = 0.8 and ΔE ₀₀ = 1.8, respectively, with RTP₀₀ PT = 0.62.</p><p><strong>Results: </strong>High-speed sintering resulted in color changes that were greater than the AT (ΔE ₀₀ = 1.8) in the incisal (3.1 ± 0.47) and transition (1.8 ± 0.22) zones. The core zone, on the other hand, remained stable (1.4 ± 0.11; p < 0.001). Conventional sintering produced much higher RTP₀₀ in all zones (p < 0.001). The incisal zone subjected to conventional sintering demonstrated the highest translucency (10.09 ± 0.43).</p><p><strong>Conclusions: </strong>Speed sintering significantly reduces the optical properties of multi-yttria-layered zirconia, especially in the esthetically crucial incisal zone, resulting in clinically unacceptable color shifts and decreased translucency relative to conventional sintering methods.</p><p><strong>Clinical significance: </strong>While speed sintering significantly reduces time in the digital workflow, it may negatively impact the final aesthetic outcome of multi-yttria-layered zirconia restorations by compromising optical properties and reducing translucency in the incisal and transition zones. When maximum aesthetic integration is needed for anterior restorations, clinicians and lab technicians should prioritize conventional sintering.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":" ","pages":"1848-1853"},"PeriodicalIF":4.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13471936/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147930332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the Seating of Crowns After Adjusting Proximal Contacts Using Different Materials.","authors":"Mitali Ashwin Jain, Krishna Prasad D","doi":"10.1111/jerd.70158","DOIUrl":"10.1111/jerd.70158","url":null,"abstract":"<p><strong>Objective: </strong>Achieving physiologic proximal contact is essential for complete crown seating and long-term periodontal health. Improper adjustment can result in tight or open contacts, leading to incomplete seating, marginal discrepancies, food impaction, and discomfort. This study evaluated the seating accuracy of posterior single-unit porcelain fused to metal (PFM) crowns after proximal contact adjustment using different contact-indicating methods.</p><p><strong>Clinical considerations: </strong>In this prospective randomized clinical study, 124 patients requiring posterior single-unit PFM crowns were randomly allocated into four groups (n = 31 each): Artifol (8 μm), articulating paper (40 μm), Arti-Spot (3 μm), and visual acuity alone. Proximal contacts were adjusted during laboratory procedures according to the assigned method. At clinical try-in, seating was considered \"perfect\" if no further proximal adjustment was required. Intraoral periapical radiographs confirmed crown seating. Data were analyzed using Fisher's exact tests (p < 0.05).</p><p><strong>Conclusion: </strong>A significant association was observed between adjustment method and crown seating (p = 0.000). Arti-Spot demonstrated the highest number of perfectly seated crowns (29/31), whereas visual assessment showed the poorest results. Thin contact-indicating materials demonstrated more consistent outcomes in immediate chairside proximal contact assessment compared to other methods.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":" ","pages":"1832-1839"},"PeriodicalIF":4.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13471955/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147856542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Air-Abrasion With Aluminum Oxide Particles in Non-Carious Cervical Lesions: Impact on Sclerotic Superficial Layer, Surface Topography, and Restorative Adhesive Performance.","authors":"Nathalie Murielly Rolim de Abreu, Romina Ñaupari-Villasante, Pedro Henrique de Aguiar Moreira, Alessandro D Loguercio, Frederico Barbosa de Sousa","doi":"10.1111/jerd.70251","DOIUrl":"https://doi.org/10.1111/jerd.70251","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate the effect of airborne-particle abrasion (APA) with aluminum oxide on superficial dentin sclerosis, surface topography, and bonding performance of a universal adhesive in natural non-carious cervical lesions (NCCLs), using dentin classification by the North Carolina Index (NCI) and Optical Coherence Tomography Index (OCT).</p><p><strong>Methods: </strong>Forty-eight premolars with natural NCCLs were distributed according to dentin sclerosis classification (non-sclerotic or sclerotic) by NCI and OCT, with concordant and discordant (dentin types) classifications into four APA treatment groups (n = 8), and two untreated groups (control, n = 8, non-sclerotic and sclerotic, for adhesive testing). Pre- and post-treatment analyses included stereomicroscopy, OCT, microcomputed tomography (volume and thickness loss), and 3D optical profilometry (surface roughness). Adhesive performance of a universal adhesive was assessed by microtensile bond strength (μTBS), nanoleakage (scanning electron microscopy), and chemical mapping (micro-Raman spectroscopy). Data were analyzed with parametric and non-parametric tests (α = 0.05).</p><p><strong>Results: </strong>APA did not significantly change dentin classification by NCI or OCT (p > 0.05) but removed a superficial layer (volume loss: 0.33 mm³; thickness loss: 34 μm) and significantly increased surface roughness (p < 0.001), without dentin-type differences (p = 0.38). Adhesive performance was substrate-dependent: APA improved μTBS in sclerotic dentin (per OCT) and reduced it in non-sclerotic dentin (per OCT). Nanoleakage did not differ among groups (p > 0.05).</p><p><strong>Conclusion: </strong>APA modified dentin surface topography without removing superficial dentin sclerosis, while the effect on bonding was substrate-dependent.</p><p><strong>Clinical significance: </strong>APA-induced surface modification, including volume loss and increased surface roughness, improved bonding performance in sclerotic NCCL dentin without completely removing the sclerotic layer.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148865405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Pink Coloring Liquid on Mechanical and Optical Properties of 3Y Zirconia.","authors":"Amir H Nejat, Rivers Singley, Mohamed Elshengab, David Tran, Adriana C Wilson","doi":"10.1111/jerd.70208","DOIUrl":"https://doi.org/10.1111/jerd.70208","url":null,"abstract":"<p><strong>Objectives: </strong>To evaluate the effect of pink coloring liquid on the mechanical and optical properties of the 3 mol% yttria stabilized zirconia (3Y).</p><p><strong>Methods: </strong>Discs of 1 mm and 2 mm were fabricated from 3Y zirconia (IPS E.max ZirCAD LT). Pre-sintered discs were randomly allocated into four groups (n = 10 per group) including control group with no coat of pink coloring liquid (C0), one coat (C1), three coats (C3), and five coats (C5) of pink coloring liquid. Discs were then sintered according to the manufacturer's recommendation. Translucency parameter (TP) of the 1 mm thick discs was evaluated by measuring L*a*b* values against a black and a white background with a spectrophotometer, and both TP_ab and TP₀₀ were calculated. Surface roughness of the samples after sintering was measured using a profilometer. Biaxial flexural strength of 1 mm thick specimens was measured according to ISO 6872. Surface hardness was measured by Vicker's hardness. One-way analysis of variance (ANOVA) was used for the statistical analyses with the significance level set at 5% (α = 0.05).</p><p><strong>Results: </strong>Applying different coats of pink coloring liquid resulted in a significant reduction in TP and biaxial flexural strength (p < 0.001). Increasing the number of applied pink coloring liquid coats reduced the TP and biaxial flexural strength further. Application of pink coloring liquid did not alter the surface roughness and hardness of the sample (p > 0.05).</p><p><strong>Conclusion: </strong>Within the limitations of the present study, applying pink coloring liquid on zirconia in green state altered the translucency and biaxial flexural strength of sintered zirconia.</p><p><strong>Clinical significance: </strong>When applying pink coloring liquid to zirconia restorations in the green state, caution needs to be taken in the number of coats applied as a higher number of coats (3 and 5 coats) of currently tested pink coloring liquid reduce the strength and increase the opacity of the zirconia.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148818305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Digital Stackable Guide Protocol for FP1 Full-Arch Esthetic Reconstruction With Monolithic Zirconia.","authors":"Lina Maiza, Pedro Barreiros","doi":"10.1111/jerd.70256","DOIUrl":"https://doi.org/10.1111/jerd.70256","url":null,"abstract":"<p><strong>Objective: </strong>To describe a fully digital and stackable surgical guide workflow for full-arch rehabilitation in a patient with advanced periodontitis, aiming to restore esthetics, function, and biological stability with a monolithic zirconia prosthesis.</p><p><strong>Clinical considerations: </strong>A 38-year-old female presented with excessive gingival display and tooth mobility associated with Stage III, Grade C periodontitis. After periodontal stabilization, a digital workflow integrating CBCT and intraoral scans was implemented using CoDiagnostiX software. A four-stage stackable guide system enabled precise anchor pin placement, bone reduction, and implant positioning for a six-implant (\"All-on-Six\") immediate-loading protocol. A prefabricated PMMA provisional prosthesis was delivered at surgery. At 5 months, a connective tissue graft refined soft tissue contours, and at 6 months, a definitive two-piece monolithic zirconia prosthesis was delivered, achieving excellent gingival integration, occlusal balance, and esthetic harmony.</p><p><strong>Conclusion: </strong>A digitally guided, stackable workflow allows accurate bone reduction, prosthetically driven implant positioning, and predictable esthetic outcomes in complex full-arch rehabilitations following periodontitis.</p><p><strong>Clinical significance: </strong>Integrating stackable guide technology with monolithic zirconia restorations enhances surgical precision, minimizes intraoperative variability, and ensures long-term esthetic and functional stability in full-arch implant rehabilitations.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148818707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative Evaluation of Tooth Type and Pulp Chamber Depth on the Accuracy of Endocrown Scans Acquired Using Various Intraoral Scanners.","authors":"Selen Erkul, Zeynep Ozkurt-Kayahan, Yunus Emre Özden, Mehmet Baybora Kayahan","doi":"10.1111/jerd.70253","DOIUrl":"https://doi.org/10.1111/jerd.70253","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate the effects of pulp chamber depth, tooth type, and intraoral scanner (IOS) on the accuracy of endocrown digital impressions.</p><p><strong>Materials and methods: </strong>Standardized endocrown preparations with 2 and 5 mm pulp chamber depths were performed on molar and premolar typodonts. Digital impressions were obtained using three IOSs (Dexis, iTero, and 3Shape). Reference scans were acquired using a laboratory scanner. Accuracy was assessed following best-fit alignment. Cavity base and axial regions were separately evaluated. Data were analyzed using Kruskal-Wallis and Dunn post hoc tests (α = 0.05).</p><p><strong>Results: </strong>Pulp chamber depth, tooth type, and IOS significantly affected scanning accuracy (p < 0.05). Increasing cavity depth increased deviations at cavity base while reducing deviations at axial region. Premolar preparations with 5 mm depth exhibited the highest cavity base deviations (99.5-107.2 μm). At axial region, iTero demonstrated the lowest deviations (28.2 μm) in 5 mm depth molar preparations. Dexis and iTero showed comparable performance at cavity base.</p><p><strong>Conclusions: </strong>Effect of cavity depth was region-dependent, negatively affecting cavity base while improving accuracy at axial region. Molar preparations demonstrated superior cavity base trueness, whereas premolar preparations exhibited better axial region trueness. Deep premolar preparations represented the most challenging condition for accurate digital acquisition.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148829185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diet-Induced Chromogenic Challenge Model for Additively Manufactured Tooth-Colored Dental Resin Materials.","authors":"Ülkü Tuğba Kalyoncuoğlu, Bengi Yilmaz Erdemli, Simel Ayyildiz","doi":"10.1111/jerd.70257","DOIUrl":"https://doi.org/10.1111/jerd.70257","url":null,"abstract":"<p><strong>Objectives: </strong>This study aimed to evaluate the color stability of glaze-coated 3D-printed resin materials stored in different nutritionally beneficial smoothies that are commonly consumed.</p><p><strong>Methods: </strong>Disc-shaped (27 × 1 mm) specimens were fabricated from tooth-colored 3D-printed dental resins with different indications: Arma Resin (Group A), VarseoSmile Crown Plus (Group B), Flexcera Smile Ultra+ (Group E), Formlabs Permanent Crown (Group F) (n = 10 per group). After post-processing and cleaning, all specimens received a standardized nano-filled, light-polymerized glaze coating. Water contact angle and roughness values were measured. The specimens were immersed in artificial saliva as control (AS) and three smoothies (green [G], orange [O], and purple [P]) for 30 days. pH and °Brix levels of beverages were recorded. Reflectance spectra were recorded using UV-Vis-NIR spectrophotometer and converted to color coordinates. Color differences ( <math> <mrow> <msubsup><mrow><mo>∆</mo> <mi>E</mi></mrow> <mi>ab</mi> <mo>*</mo></msubsup> </mrow> </math> and <math><mrow><mi>Δ</mi> <msub><mi>E</mi> <mn>00</mn></msub> </mrow> </math> ) were calculated. Surface roughness and contact angle data were analyzed using two-way ANOVA, while color change data were analyzed using Welch's ANOVA and Games-Howell post hoc test (α = 0.05).</p><p><strong>Results: </strong>Surface roughness was significantly affected by material type, while storage media had no significant effect. Contact angle values were significantly influenced by both material type and storage media. Significant differences in <math> <mrow> <msubsup><mrow><mo>∆</mo> <mi>E</mi></mrow> <mi>ab</mi> <mo>*</mo></msubsup> </mrow> </math> and <math><mrow><mi>Δ</mi> <msub><mi>E</mi> <mn>00</mn></msub> </mrow> </math> were observed only between the orange smoothie subgroups and their corresponding artificial saliva controls in Groups B, E, and F. No significant differences were observed for Group A in orange smoothie or for the green and purple smoothie subgroups compared with their corresponding artificial saliva controls.</p><p><strong>Conclusion: </strong>Orange smoothie caused significantly greater color changes than artificial saliva in Groups B, E, and F, but not in Group A. This finding suggests that the discoloration susceptibility of specimens is strongly influenced by material composition and specific smoothie ingredients.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148829176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}