Dental Materials最新文献

{"title":"Milling has superior mechanical properties to other fabrication methods for PMMA denture bases: A systematic review and network meta-analysis","authors":"Zsófia Éva Vincze ,&nbsp;Lilien Nagy ,&nbsp;Kata Kelemen ,&nbsp;Bianca Gólzio Navarro Cavalcante ,&nbsp;Noémi Gede ,&nbsp;Péter Hegyi ,&nbsp;Dorottya Bányai ,&nbsp;László Köles ,&nbsp;Krisztina Márton","doi":"10.1016/j.dental.2024.12.017","DOIUrl":"10.1016/j.dental.2024.12.017","url":null,"abstract":"<div><h3>Objectives</h3><div>This systematic review and network meta-analysis aimed to compare different PMMA (polymethyl methacrylate) complete denture base manufacturing techniques by evaluating their mechanical properties. The objective was to determine which method—compression molding, injection molding, milling, or 3D printing—offers the best performance.</div></div><div><h3>Data</h3><div>In vitro studies investigating mechanical properties of PMMA denture base resins.</div></div><div><h3>Sources</h3><div>Four electronic databases such as PubMed, Embase, Web of Science, and the Cochrane Library were screened for English language articles. Two independent researchers selected studies, extracted data, assessed risk of bias, and evaluated evidence certainty.</div></div><div><h3>Results</h3><div>A total of 17152 articles were found by electronic databases. Finally, 63 studies were analyzed, using random-effects model for network meta-analysis. The outcomes investigated were flexural strength, flexural modulus, surface roughness, impact strength, and Vickers hardness. Milling consistently ranked first or second across outcomes, excelling in flexural strength, modulus, and surface roughness. In contrast, 3D-printed denture bases demonstrated the lowest mechanical performance, highlighting the limitations of this technique at present.</div></div><div><h3>Conclusion</h3><div>Milling is generally recommended for PMMA denture bases due to its superior mechanical properties across most outcomes, supporting its use in clinical settings. However, while promising, 3D-printed PMMA denture bases require further improvement to meet clinical performance standards.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"41 4","pages":"Pages 366-382"},"PeriodicalIF":4.6,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142942120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of the chemical solubility of experimental and commercial lithium silicate glass-ceramics","authors":"Bruna de F. Vallerini ,&nbsp;Ligia A.P. Pinelli ,&nbsp;Laís D. Silva ,&nbsp;Viviane O. Soares ,&nbsp;Oscar Peitl ,&nbsp;Edgar D. Zanotto ,&nbsp;Rodrigo França","doi":"10.1016/j.dental.2024.12.007","DOIUrl":"10.1016/j.dental.2024.12.007","url":null,"abstract":"<div><h3>Objective</h3><div>This study aimed to evaluate the chemical solubility (CS) and conduct a comprehensive physicochemical characterization of several experimental and commercial lithium silicate-based glass-ceramics towards an understanding of the chemical processes governing dissolution in these glass-ceramics.</div></div><div><h3>Methodology</h3><div>Glass-ceramic (GC) samples were categorized into two groups: experimental materials featuring lithium metasilicate crystals (GCE1 and GCE2); and five commercial brands relying mostly on lithium disilicate (Celtra®Duo, IPS e.max®CAD, Straumann®n!ce®, CEREC Tessera™, and VITA Suprinity®). CS was assessed by submerging samples in a 4 % acetic acid solution following ISO 6872 standards. High-resolution inductively coupled plasma mass spectrometry (HR-ICP-MS) was employed to evaluate ion leaching from the residual acetic acid solution. Surface roughness and chemical composition were scrutinized using Atomic Force Microscopy (AFM) and X-Ray Photoelectron Spectroscopy (XPS), respectively.</div></div><div><h3>Results</h3><div>All groups met the CS standards. Kruskal-Wallis with the Dunn post-hoc test was used for CS, two-way ANOVA for roughness, and three-way ANOVA for XPS, each followed by Tukey’s post-hoc test (α=0.05). AFM revealed no significant alteration in surface roughness post-immersion for the majority of the groups, except for IPS e.max®CAD (p &lt; 0.001). XPS detected compositional changes in all GCs following CS testing. HR-ICP-MS indicated a higher leaching of Li⁺ ions (as expected) across all groups.</div></div><div><h3>Conclusion</h3><div>This study supports the understanding of the chemical processes that govern the dissolution of glass-ceramics and evaluate how different formulations influenced the CS and elemental composition. In this sense, the GCE2 group exhibited the most favorable properties for dental applications, mirroring the performance of the main commercial materials.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"41 3","pages":"Pages e8-e17"},"PeriodicalIF":4.6,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142942116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of the resin cement opacity on the final color of conservative ceramic restorations and on its ability to mask substrates of different saturations","authors":"Samara Franco da Silva ,&nbsp;Mylena de Araújo Régis ,&nbsp;Camila Pontes Custódio ,&nbsp;Paulo Francisco Cesar ,&nbsp;Heitor Marques Honório ,&nbsp;Carlos Eduardo Francci","doi":"10.1016/j.dental.2024.12.010","DOIUrl":"10.1016/j.dental.2024.12.010","url":null,"abstract":"<div><h3>Objective</h3><div>To analyze the impact of the translucency/opacity of two commercial brands of resin cements and different translucency of lithium disilicate on the masking ability of saturated substrates.</div></div><div><h3>Methods</h3><div>120 samples (n = 5) were prepared using 0.5 mm lithium disilicate (IPS e.max CAD) in three translucencies (HT, MT, LT). These were cemented onto A1 and A4 resin substrates using two brands of resin cements: Allcem Veneer (FGM) in Trans (T) and Opaque White (OW), and Variolink Esthetic LC (Ivoclar Vivadent) in Neutral (N) and Light+ (L+), with a thickness of 100 µm. Color analysis was performed using reflectance measurements with a CM-3700d spectrophotometer (Konica Minolta). The Relative Translucency Parameter (RTP) and the Color Difference (∆E00) were calculated using the CIEDE2000 formula, with Perceptibility Threshold (PT) of ∆E00 = 0.8 and Acceptability Threshold (AT) of ∆E00 = 1.8. Statistical analyses were conducted using three-way ANOVA followed by Tukey's tests (α=0.05).</div></div><div><h3>Results</h3><div>For ∆E00 between substrates saturation (A1 VS A4), the isolated fixed factors and their interaction were statistically significant (p &lt; .001) and showed ∆E00 &gt; 1.8 for all groups. ∆E00 between resin cements colors of the same brand reveals significant factors (p &lt; .001) but a non-significant statistical interaction (p = 0.072). The RTP of the resin cement were N(47.64) &gt; T(47.47) &gt; Ow(42.02)&gt;L+ (23.39). For restorative set RTP, a non-significant interaction (p &gt; 0.05) and groups cemented with L+ reveal lower RTP values than those cemented with OW.</div></div><div><h3>Significance</h3><div>The ceramic translucency, the resin cement brand and color were influential on ability to mask substrates of different saturations. The opaquest resin cement contributes to reduce the influence of the ceramic on restoration final color. Resin cement brand and color influences restoration esthetics.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"41 4","pages":"Pages 357-365"},"PeriodicalIF":4.6,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-lasting antimicrobial effect of multipurpose ZnO nanoparticle-loaded dental resins enhanced by blue light photodynamic therapy","authors":"Maria Luisa Leite ,&nbsp;Patricia Comeau ,&nbsp;Ala Zaghwan ,&nbsp;Ya Shen ,&nbsp;Adriana Pigozzo Manso","doi":"10.1016/j.dental.2024.12.006","DOIUrl":"10.1016/j.dental.2024.12.006","url":null,"abstract":"<div><h3>Objectives</h3><div>This study aimed to assess the potential of experimental dental resins containing ZnO nanoparticles (ZnO-NPs) for antimicrobial photodynamic therapy (aPDT) as a functional tool for the modulation of cariogenic biofilm in long-term.</div></div><div><h3>Methods</h3><div>Minimum inhibitory and bactericidal concentrations (MIC/MBC) of ZnO-NPs against Streptococcus mutans were initially determined under different energy densities of blue LED irradiation (0.00, 1.35, 6.75, or 20.25 J/cm²) to optimize aPDT parameters. Experimental dental resins were then formulated with 0 % (control), 5 %, 10 %, and 20 % ZnO-NPs. Resin disks (1 mm x 6 mm) were prepared to evaluate the antimicrobial and photocatalytic potential of the experimental groups associated with 0 (dark), 1, 2, or 4 light cycles of blue-light irradiation (20.25 J/cm², each cycle). The CFU count and Live/Dead assays were performed on a cariogenic biofilm model (<em>S. mutans</em>) on fresh and 6-month aged resin disks.</div></div><div><h3>Results</h3><div>Blue light at 20.25 J/cm² decreased MIC (from 250 µg/mL to 125 µg/mL) and MBC (from 1000 µg/mL to 500 µg/mL), establishing the optimal aPDT protocol. Experimental resins with 5 %, 10 %, or 20 % ZnO-NPs, when exposed to 4 cycles of blue light, significantly reduced biofilm viability compared to controls, both initially and after aging. The 20 % ZnO-NP resin sustained &gt; 3.log10 CFU reduction after 6 months, even with 2 cycles of light. Live/Dead assays showed &gt; 50 % dead cells with the 20 % ZnO-NP resin after 2 light cycles.</div></div><div><h3>Significance</h3><div>ZnO-NP-loaded dental resins associated with blue light aPDT offer promise as a long-lasting antimicrobial alternative, potentially enhancing the control of pathogenic biofilms.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"41 3","pages":"Pages 347-355"},"PeriodicalIF":4.6,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of uniaxial bending methods on the flexural strength and Weibull analysis of heat-polymerized, CAD/CAM milled, and 3D-printed denture base resins","authors":"Abdulaziz Alhotan ,&nbsp;Hanan Al-Johani ,&nbsp;Ahmed Altarazi ,&nbsp;Abdullah Alshamrani ,&nbsp;Ahmed Mahmoud Fouda","doi":"10.1016/j.dental.2024.12.015","DOIUrl":"10.1016/j.dental.2024.12.015","url":null,"abstract":"<div><h3>Objectives</h3><div>To compare the flexural strength and modulus of denture base resins manufactured by conventional methods, 3-dimensional (3D) printing, and computer-aided design and computer-aided manufacturing (CAD/CAM) milling using 3-point bending (3PB) and 4-point bending (4PB) methods after simulated aging.</div></div><div><h3>Methods</h3><div>Ninety bars (64 ×10 ×3.3 mm) were prepared from heat-polymerized (Lucitone-199), CAD/CAM milled (G-CAM), and 3D-printed (Denturetec) denture base resins (n = 30 per material). After 10,000 thermal cycles, specimens were subjected to either 3-point bending (3PB) or 4-point bending (4PB) (n = 15 per method) to measure the flexural strength (σ_3PB and σ_4PB) and elastic modulus (E_3PB and E_4PB) using a universal testing machine. Weibull analysis was performed to evaluate the reliability (<em>m</em>) and characteristic strength (σ₀) as a function of 3PB and 4PB. Fractographic analysis was conducted using scanning electron microscopy (SEM). Data were analysed using 2-way ANOVA followed by Tukey post hoc and Student t-tests (α=.05).</div></div><div><h3>Results</h3><div>Significant effects of material type and uniaxial bending method on flexural strength and modulus were found (<em>P</em> &lt; .001). Irrespective of the flexural strength measurement approach, CAD/CAM milled resins exhibited significantly higher flexural strength in both methods (σ_3PB=125.6 ± 5.2 MPa, σ_4PB=110.5 ± 4.5 MPa) and elastic modulus (E_3PB=2400 ± 120 MPa and E_4PB=2800 ± 150 MPa) compared to 3D-printed and heat-polymerized resins. Irrespective of the denture base resin manufacturing method, σ_3PB was significantly higher than σ_4PB whereas E_4PB was significantly higher than E_3PB (<em>P</em> &lt; .001). Weibull analysis exhibited highest reliability for CAD/CAM resins (<em>m</em>=25.24 – 43.83). Considerable microscopic differences were detected.</div></div><div><h3>Significance</h3><div>CAD/CAM milled denture base resins exhibited superior flexural properties compared with 3D-printed and heat-polymerized resins.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"41 3","pages":"Pages e1-e7"},"PeriodicalIF":4.6,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental investigation and finite element analysis on the durability of root-filled teeth treated with multisonic irrigation","authors":"Fei Lin ,&nbsp;Ronald Ordinola-Zapata ,&nbsp;Bonita VanHeel ,&nbsp;Lu Zhang ,&nbsp;Roy Lee ,&nbsp;Zhou Ye ,&nbsp;Haiping Xu ,&nbsp;Alex S.L. Fok","doi":"10.1016/j.dental.2024.12.009","DOIUrl":"10.1016/j.dental.2024.12.009","url":null,"abstract":"<div><h3>Objective</h3><div>This study compared the fracture load, stress distribution, and survival probability under cyclic loading of extensively restored teeth treated with multisonic irrigation with those treated with conventional instrumentation, with or without a post.</div></div><div><h3>Methods</h3><div>Mesial-occlusal-distal cavities were prepared in 30 human mandibular premolars. The teeth were randomly divided into 3 groups of 10 based on the endodontic and restorative procedures: (1) Root canal treatment (RCT) followed by resin composite restoration (control group), (2) RCT followed by a glass fiber post restoration (conventional group), and (3) minimal instrumentation plus multisonic irrigation followed by resin composite restoration (GW group). All groups were restored with full-coverage crowns. The samples were subjected to step-stress cyclic loading until fracture and then scanned using micro-CT to identify the fracture modes. FEA was conducted to evaluate the failure-causing stresses.</div></div><div><h3>Results</h3><div>The mean fracture loads for the control, conventional, and GW groups were 1700 ± 176 N, 1760 ± 97 N, and 1760 ± 70 N, respectively. The respective numbers of cycles to failure were 39461 ± 6634, 41261 ± 3965, and 40151 ± 3127. There was no significant difference in the fracture load or number of cycles to failure among the groups (p &gt; 0.05). This was supported by the FEA results which showed similar critical stress values in the three groups.</div></div><div><h3>Significance</h3><div>The multisonic irrigation system led to a comparable fracture load and durability in extensively restored premolars as conventional RCT with or without a fiber post.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"41 3","pages":"Pages 341-346"},"PeriodicalIF":4.6,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Light-curing of restorative composite through milled and 3D-printed full-contour zirconia for adhesive luting","authors":"Wout Jacobs ,&nbsp;Bernardo Camargo ,&nbsp;Mohammed Ahmed ,&nbsp;Evita Willems ,&nbsp;Stevan M. Čokić ,&nbsp;Fei Zhang ,&nbsp;Jef Vleugels ,&nbsp;Bart Van Meerbeek","doi":"10.1016/j.dental.2024.12.008","DOIUrl":"10.1016/j.dental.2024.12.008","url":null,"abstract":"<div><h3>Objectives</h3><div>To evaluate the effect of different zirconia compositions and manufacturing processes on the light irradiance (LI), to measure the degree of conversion (DC) of solely light-curing restorative composite underneath these zirconia grades and to evaluate the respective zirconia microstructures.</div></div><div><h3>Methods</h3><div>Six dental zirconia grades (GC HT, GC UHT [GC]; Katana HT, Katana UTML [Kuraray Noritake]; Lava Esthetic, Lava Plus [3 M Oral Care]) were cut and sintered per manufacturer instructions. One 3D-printed zirconia grade (XJet [XJET]) was prepared according to previous research. Zirconia plates were ground to four thicknesses (0.5, 1.0, 1.5, 3.0 mm). The LI through these zirconias was measured using light spectrometry using two light-curing units (Demi Plus [Kerr], Bluephase G4 [Ivoclar]). Restorative composite (Clearfil AP-X [Kuraray Noritake]) was light-cured through the zirconia plates and the DC was determined by micro-Raman spectrometry 5 min, 24 h and 1 w after light-curing. Statistical analysis of LI and DC data involved linear mixed-effects modelling and multi-way ANOVA. Microstructural analysis of zirconia was performed by scanning electron microscopy.</div></div><div><h3>Results</h3><div>Zirconia type and thickness, and LCU had a significant effect on LI (p &lt; .0001). DC significantly increased over time (p &lt; .0001) and was not influenced by curing-light attenuation if LI reached at least 40 mW/cm². Increased yttria content resulted in an increased zirconia grain size.</div></div><div><h3>Significance</h3><div>Despite significant light attenuation, DC of composite light-cured through zirconia at almost all thicknesses, approached DC measured without zirconia interposition for five out of seven zirconia grades. Additionally, the manufacturing process did not seem to influence LI or DC.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"41 3","pages":"Pages 331-340"},"PeriodicalIF":4.6,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accurate assessment of the three-dimensional shrinkage stress evolution for photopolymerized dental filling materials: Mechano-chemo-thermo-coupled finite element modeling and experimental validation","authors":"Kun Wang ,&nbsp;Qingyue Peng ,&nbsp;Jiaqi Yao ,&nbsp;Zhengzhi Wang","doi":"10.1016/j.dental.2024.12.005","DOIUrl":"10.1016/j.dental.2024.12.005","url":null,"abstract":"<div><h3>Objective</h3><div>Photopolymerized resin composites are widely used as dental filling materials. However, the shrinkage stress generated during photopolymerization can lead to marginal microcracks and eventual restoration failure. Accurate assessment of the stress evolution in dental restorations, particularly in complex cavity geometries, is critical for improving the performance and longevity of the dental filling materials. This study aims to develop a novel mechano-chemo-thermo-coupled finite element method (FEM) to accurately capture three-dimensional (3D) shrinkage stress of resin-based photopolymerized filling materials.</div></div><div><h3>Methods</h3><div>The FEM was established with consideration for the evolution of mechanical properties, thermal effects, and polymerization shrinkage during photopolymerization. Real-time material property evolution was derived from measurements of degree of conversion and temperature changes, and these were integrated into the FEM alongside thermal expansion/contraction effects. The FEM was parameterized through mechanical, chemical, and thermal experiments, then applied to simulate different photocuring protocols and boundary conditions. The accuracy of the predicted shrinkage stress was validated through three experiments: uniaxial shrinkage stress measurement, full-field optical measurement, and acoustic emission analysis using typical dimethacrylate-based dental filling materials.</div></div><div><h3>Results</h3><div>The coupled FEM model achieved predictive stress magnitudes in quantitative agreement with the experimental measurements (relative error ∼1 %), significantly improving upon existing methods (∼22.5 %). Furthermore, the FEM accurately predicted spatial debonding based on stress distribution, providing insights unattainable through current methods.</div></div><div><h3>Significance</h3><div>This experiment-modeling-combined study provides a valuable tool for accurately predicting the spatial and temporal evolution of the shrinkage stress in resin-based dental filling materials, thereby providing new insights for optimizing their clinical applications and enhancing durability.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"41 3","pages":"Pages 319-330"},"PeriodicalIF":4.6,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The preventive effect of silver diamine fluoride-modified salivary pellicle on dental erosion","authors":"Darren Dhananthat Chawhuaveang,&nbsp;Walter Yu Hang Lam,&nbsp;Chun Hung Chu,&nbsp;Ollie Yiru Yu","doi":"10.1016/j.dental.2024.10.014","DOIUrl":"10.1016/j.dental.2024.10.014","url":null,"abstract":"<div><h3>Objective</h3><div>To investigate the preventive effect of silver diamine fluoride (SDF) modified salivary pellicle (SP) against dental erosion.</div></div><div><h3>Methods</h3><div>Enamel and dentin blocks allocated into 4 groups (n = 30 each). Blocks in Group SDF+SP were treated with SDF and SP. Blocks in Group SDF were treated with SDF. Blocks in Group DW+SP were treated with deionized water (DW) and SP. Blocks in Group DW were treated with DW. The blocks were subjected to an erosive challenge at pH 3.2 for 2 mins, 5 times per day for 14 days. Salivary pellicle morphology was assessed by atomic force microscopy (AFM). Crystal characteristics, percentage microhardness loss (%SMHL), surface loss, and surface morphology were assessed by X-ray diffraction (XRD), microhardness test, profilometry, and scanning electron microscopy (SEM), respectively.</div></div><div><h3>Results</h3><div>AFM revealed a modified pellicle morphology in Group SDF+SP. XRD of both blocks revealed hydroxyapatite, silver chloride, silver phosphate, and silver fluoride in Groups SDF+SP and SDF. Fluoroapatite was found in Group SDF+SP only. %SMHL ( ± Standard deviation in %) of Groups SDF+SP, SDF, DW+SP, and DW were 33.4 ± 2.2, 38.6 ± 2.2, 50.3 ± 2.2, and 58.3 ± 2.4 in enamel and 16.1 ± 2.2, 19.7 ± 2.1, 32.8 ± 2.1, and 39.0 ± 2.3 in dentin, respectively. The presence of SDF and SP reduced %SMHL in both blocks (<em>p</em> &lt; 0.001). The surface loss ( ± Standard deviation in μm) of Groups SDF+SP, SDF, DW+SP, and DW were 3.6 ± 0.7, 4.1 ± 0.4, 5.3 ± 0.5, and 7.0 ± 0.6 in enamel and 5.4 ± 0.6, 6.1 ± 0.5, 9.1 ± 0.7, and 9.2 ± 0.5 in dentin, respectively. The presence of SDF and SP reduced surface loss in enamel and dentin blocks (<em>p</em> = 0.031 and <em>p</em> = 0.002, res<em>p</em>ectively). SEM showed enamel surface remained relatively smooth and partially dentinal tubule occlusion on dentin blocks in Groups SDF+SP and SDF.</div></div><div><h3>Conclusion</h3><div>SDF had a positively synergistic effect with SP. SDF-modified salivary pellicle provided a superior protective effect against dental erosion.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"41 1","pages":"Pages 58-69"},"PeriodicalIF":4.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142542502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"5-year effect of immediate and delayed dentinal sealing bond strength","authors":"A Comba * ,&nbsp;A Baldi ,&nbsp;T Rossi ,&nbsp;G Gennari ,&nbsp;C Rolando ,&nbsp;L Breschi ,&nbsp;A Mazzoni ,&nbsp;N Scotti","doi":"10.1016/j.dental.2025.01.044","DOIUrl":"10.1016/j.dental.2025.01.044","url":null,"abstract":"","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"41 ","pages":"Page e18"},"PeriodicalIF":4.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143609308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}