Journal of Prosthetic Dentistry最新文献

{"title":"A quantitative assessment of the influence of voltage on the formation of oxide layers on the surface of titanium by anodization.","authors":"Michał Wilk, Leszek Klimek, Beata Śmielak","doi":"10.1016/j.prosdent.2025.02.026","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.026","url":null,"abstract":"<p><strong>Statement of problem: </strong>Restorations based on titanium and its alloys form weak connections with veneering ceramics. It is unclear if anodizing the titanium surface with different voltages leads to improved bonding.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to obtain an oxide layer of an appropriate thickness (0.5 to 0.8 µm) and determine its bond strength.</p><p><strong>Material and methods: </strong>Titanium specimens were anodized in a mixture of 1 M H₂SO₄ and H₃PO₄ at 120 V, 160 V, and 200 V. The surface was examined by X-ray diffraction (XRD), scanning electron microscopy (SEM), surface roughness testing, and contact angle to determine the surface free energy (SFE). The obtained results contact angle, and SPE were analyzed using the Friedman test, Dunn-Bonferroni post hoc test, and the Page trend test (α=.05). Statistically significant test value was P<.05 and highly significant P<.01. The adhesion of anodized layers to the surface of titanium specimens was determined according to the Verein Deutscher Ingenieure (VDI) 3198 norm (destructive quality test for coated compounds, Rockwell hardness).</p><p><strong>Results: </strong>In the diffraction diagram, the oxide layer has an anatase crystalline structure with thicknesses of 0.61 µm for 120 V, 1.25 µm for 160 V, and 2.30 µm for 200 V. The secondary electron (SE) and backscattered electron (BSE) images provide an indication of the topography and geometric structure pores, as well as their size and shape. Anodic coatings obtained with higher voltages demonstrate higher roughness profiles. The highest SFE value was obtained for 160 V anodization voltage, the smallest for 120 V. No significant differences in contact angles were observed (P>.05) between different voltages or between different electrolytes. No significant differences between voltages were observed for the dispersive component values (P>.05); however, significant differences were observed for polar components (P<.05). Higher values were noted for 160 V than for 120 V. All indentations were within the range indicated by models HF1 and HF2 (acceptable adhesion), which differ only in the density of the fractures.</p><p><strong>Conclusions: </strong>The voltage applied during anodic oxidation using a mixture of 1 M H₂SO₄ and H₃PO₄, influenced the thickness and structure of the obtained layers. The oxide obtained had a thickness of 0.6 to 2.3 µm and an anatase crystal structure.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143572968","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":"Accuracy of a 3D printed custom resin crossbar for complete arch implant scanning: An in vitro and in vivo study.","authors":"Qinyi Lu, Yujie Zhu, Yuan Chen, Peng Xu, Yuan Liang, Tao Chen","doi":"10.1016/j.prosdent.2025.02.023","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.023","url":null,"abstract":"<p><strong>Statement of problem: </strong>The accuracy of intraoral scanners for implant-supported prostheses in edentulous jaws is unclear with limited clinical evidence.</p><p><strong>Purpose: </strong>The purpose of this in vitro and in vivo study was to evaluate the accuracy of a novel 3-dimensionally (3D) printed custom resin scanning crossbar (3D-CRC) for digital scans of complete arch implants and to provide a clinical benchmark.</p><p><strong>Material and methods: </strong>Four implants were placed on a completely edentulous master model for in vitro scanning. Accuracy was compared among the conventional splinted open tray impression (CI) and 4 digital scanning groups: cylindrical scan bodies (DC), metal crossbars (DMC), digital wings (DW), and 3D-CRC (DRC). The digital group was scanned using the iTero Element 5D Plus (IT), Medit i500 (MD), and TRIOS 5 (TR) scanners, whereas the reference model was scanned using a laboratory scanner. The trueness, precision, linear and angular deviations, and efficiency were evaluated. A self-controlled in vivo study involving 12 participants compared CI and 3D-CRC-assisted digital scans. Root mean square (RMS), linear and angular deviations, and chairside time were evaluated. Aluminum frameworks were fabricated from the scan data and clinically tested for passive fit using the Sheffield test and radiographic examination. Data were analyzed with analysis of variance and paired t tests (α=.05).</p><p><strong>Results: </strong>No significant accuracy differences were found between TR and MD scanners (P>.05), both showed higher accuracy than IT (P≤.001). Trueness did not differ significantly between the DRC and CI groups. DRC outperformed the DC (P<.001) and DMC (P=.01) for IT, as well as the DW (P=.044) for MD. Precision was comparable between DRC and CI for IT and MD (P>.05). However, CI surpassed DRC (P=.012), DW (P<.001), DMC (P=.006), and DC (P<.001) for TR, whereas DRC outperformed DW, DMC, and DC (P<.001). Linear deviation analysis showed that DRC performed better than DW (P=.038), DMC (P=.001), and DC (P<.001) for MD and better than DMC and DC (P<.001) for IT. In vivo, aluminum frameworks demonstrated a good passive fit in clinical fit assessments, with an RMS of 43.3 ±19.1 µm.</p><p><strong>Conclusions: </strong>The 3D-CRC may improve the accuracy and operational efficiency of digital scans of edentulous arches, reducing linear and angular deviations compared with other scanning methods.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143572972","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":"Defining margins and emergence profile in vertical preparations: A digital technique.","authors":"Chiara Maria Morini, Leonardo Franchini, Carlo Massimo Saratti","doi":"10.1016/j.prosdent.2024.12.031","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.031","url":null,"abstract":"<p><p>The application of a digital workflow to the biologically oriented preparation technique (BOPT) is described. The BOPT places prosthesis margins apical to the free gingival margin, promoting natural gingival adaptation and long-term tissue stability. The digital method described here addresses the clinical challenges of impression making and the accurate replication of the emergence profile from the interim to the definitive restoration.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143567252","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 post-polymerization on stainability and surface roughness of 3D printed composite resin.","authors":"Samet Atasoy, Sultan Aktuğ Karademir, Serdar Akarsu, Yaşar Sert","doi":"10.1016/j.prosdent.2025.02.018","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.018","url":null,"abstract":"<p><strong>Statement of problem: </strong>Although the post-polymerization is a necessary step to attain the final properties and color of the 3-dimensionally (3D) printed composite resins, research on its effects on color change and surface roughness is lacking.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to evaluate the effect of post-polymerization time and additional placement in boiling water on the color change and surface roughness of 3D printed composite resins after exposure to coffee for 30 days.</p><p><strong>Material and methods: </strong>Sixty disk-shaped specimens (Ø10×2 mm) were 3D printed with composite resin (Crowntec). The specimens were randomly divided into 6 groups (n=10), according to the post-polymerization process at 3 different times (2×5, 2×10, and 2×20 minutes) and depending on subsequent placement in boiling water. The color differences (ΔE₀₀) between the baseline and each aging period (1, 7, 15, and 30 days) were determined by using a spectrophotometer. After 30-day aging period, ΔL*, Δa*, and Δb* values were calculated. The surface roughness (Ra) was measured at various aging periods (initial, 7, 15, and 30 days) by a 3D noncontact optical profilometer. The data were analyzed using 2-way repeated measures ANOVA and 1-way ANOVA tests for each aging period followed by Tukey tests (α=.05).</p><p><strong>Results: </strong>As the post-polymerization time increased, a significant decrease was found in ΔE₀₀ values (P<.001), while no significant difference was found in Ra values (P=.554). The values of ΔE₀₀ and Ra increased with the aging period (P<.001). Additional placement in boiling water resulted in a statistically significant decrease in both ΔE₀₀ and Ra values (P<.001). As the post-polymerization time increased, the Δa* and Δb* values decreased, while the negative ΔL* values increased (P<.001), except for Δa* between 2×10 and 2×20 (P=.175). Additional placement in boiling water resulted in a significant decrease in Δa* and Δb* values and an increase in the negative ΔL* values (P<.001), except for Δa* in 2×20 (P=.379).</p><p><strong>Conclusions: </strong>An increase in post-polymerization time resulted in reduced stainability, while additional placement in boiling water led to reduced stainability and roughness. When subsequently placed in boiling water, the post-polymerization time had no effect on either stainability or roughness.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143557272","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":"Effect of artificial aging on color change and mechanical properties of high consistency maxillofacial silicone elastomers.","authors":"Nuran Ozyemisci, Meral Kurt, Secil Karakoca Nemli","doi":"10.1016/j.prosdent.2025.02.019","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.019","url":null,"abstract":"<p><strong>Statement of problem: </strong>Discoloration and the deterioration of mechanical properties lead to the replacement of maxillofacial prostheses. However, studies on the change in color and mechanical properties of high viscosity elastomers are lacking.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to evaluate the influence of artificial aging on the mechanical and optical properties of high-consistency silicone elastomer (HCR) and compare these properties with a widely used liquid silicone rubber (LSR).</p><p><strong>Material and methods: </strong>The specimens were fabricated from HCR (Derma-sil; Spectromatch Ltd.) and LSR (M511; Technovent Ltd.) silicone materials according to the manufacturers' instructions. A total of 325 specimens were used (50 for the tear test, 50 for the tensile and elongation test, 25 for the hardness test, 50 for absorption and solubility, and 50 for color and surface roughness measurements). Four subgroups of HCR with different Shore A hardness values (5, 20, 55, 70) were used. The specimens were subjected to tear (ASTM D624), tensile and elongation (ASTM D41215), hardness (ASTM D2240), absorption and solubility (ADA 12), surface roughness, and color change tests before and after the artificial aging process. Both water bath and ultraviolet (UV) chamber aging methods were used for the absorption and solubility tests. Contrast ratio and relative translucency parameters were also examined in addition to color change. Accelerated aging including UV light, humidity, and heat was carried out for 168 hours. The analyses were performed using 2-way factorial ANOVA and mixed ANOVA designs. Bonferroni multiple comparison test was used for significant results (α=.05).</p><p><strong>Results: </strong>The hardness values of all groups increased after aging except for the HCR subgroup with Shore A hardness 20 (P<.001). No significant change was found in surface roughness (P=.118), tear strength (P=.374), or elongation percentage (P=.053) after aging for all silicone groups. The only group with a significant change in tensile strength was HCR70 (P=.01). According to the water absorption results, absorption rates were significantly higher after artificial aging compared with bath aging in all silicone groups (P<.001) except LSR (P>.05). The aging method had significant effect on the water solubility of all groups (P<.001). Color change was significantly different among the silicone groups (P<.001).</p><p><strong>Conclusions: </strong>The HCR silicone elastomer tested in the study showed optical and mechanical properties compatible with those of a commonly used LSR silicone.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143557271","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":"Combined digital–conventional workflow to fabricate a definitive obturator from an interim obturator for a patient with an anterior maxillectomy defect","authors":"Islam E. Ali BDS, MDS ,&nbsp;Kouichi Enomoto CDT ,&nbsp;Yuka Sumita DDS, PhD ,&nbsp;Noriyuki Wakabayashi DDS, PhD","doi":"10.1016/j.prosdent.2023.04.028","DOIUrl":"10.1016/j.prosdent.2023.04.028","url":null,"abstract":"<div><div>An existing interim obturator can be reproduced as the definitive one using digital technology, with benefits for a patient with a maxillectomy. By digitally scanning the oral condition and the existing interim obturator, a definitive obturator, including a computer-aided designed and computer-aided manufactured metal framework, was fabricated and delivered to a patient with an anterior maxillectomy defect by following a combined digital and conventional workflow. This technique can hasten the adaptation of the patient to the new obturator and ensure a more comfortable and safer clinical procedure.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 920-925"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9579399","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":"Effect of cement space settings on the marginal and internal fit of 3D printed definitive resin crowns","authors":"Heedo Shin DDS ,&nbsp;You-Jung Kang PhD ,&nbsp;Hoon Kim PhD ,&nbsp;Jee-Hwan Kim DDS, MSD, PhD","doi":"10.1016/j.prosdent.2023.03.021","DOIUrl":"10.1016/j.prosdent.2023.03.021","url":null,"abstract":"<div><h3>Statement of problem</h3><div>The cement gap setting affects the marginal and internal fits depending on the crown material and manufacturing method (subtractive or additive manufacturing). However, information on the effects of cement space settings in the computer-aided design (CAD) software program, which is used to aid the manufacturing with 3-dimensional (3D) printing-type resin material, is lacking, and recommendations for optimal marginal and internal fit are needed.</div></div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to evaluate how cement gap settings affect the marginal and internal fit of a 3D printed definitive resin crown.</div></div><div><h3>Material and methods</h3><div>After scanning a prepared typodont left maxillary first molar<span>, a crown was designed with cement spaces of 35, 50, 70, and 100 μm by using a CAD software program. A total of 14 specimens per group were 3D printed from definitive 3D printing resin. By using the replica technique, the intaglio surface of the crown was duplicated, and the duplicated specimen was sectioned in the buccolingual and mesiodistal directions. Statistical analyses were performed using the Kruskal–Wallis and the Mann–Whitney post hoc tests (α=.05).</span></div></div><div><h3>Results</h3><div>Although the median values of the marginal gaps were within the clinically acceptable limit (&lt;120 μm) for all the groups, the smallest marginal gaps were obtained with the 70-μm setting. For the axial gaps, there was no observed difference in the 35-, 50-, and 70-μm groups, and the 100-μm group showed the largest gap. The smallest axio-occlusal and occlusal gaps were obtained with the 70-μm setting.</div></div><div><h3>Conclusions</h3><div>Based on the findings of this in vitro study, a 70-μm cement gap setting is recommended for optimal marginal and internal fit of 3D printed resin crowns.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 821-826"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9841660","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":"Wear resistance of 3D printed, milled, and prefabricated methacrylate-based resin materials: An in vitro study","authors":"Passupang Veerapeindee DDS ,&nbsp;Pimduen Rungsiyakull DDS, MDSc, PhD, FRCDS ,&nbsp;Wissanee Jia-mahasap DDS, MS, FACP","doi":"10.1016/j.prosdent.2024.12.006","DOIUrl":"10.1016/j.prosdent.2024.12.006","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Three-dimensional (3D) printing and milling technologies have been increasingly used in prosthodontic practice for fabricating digital prostheses. Nevertheless, evidence relating to the wear resistance of denture teeth fabricated using these methods is lacking.</div></div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to compare the wear resistance exhibited by denture teeth fabricated using 3D printing and milling technologies with prefabricated denture teeth.</div></div><div><h3>Material and methods</h3><div>Fifty specimens of resin denture teeth from 3 types of manufacturing processes were prepared and divided into 5 groups: 1 group of 3D printed denture teeth (NextDent C&amp;B MFH), 2 groups of milled denture teeth (Ivotion Dent and VIPI Block), and 2 groups of prefabricated denture teeth (Major Dent and Cosmo HXL). Each group of specimens was occluded with a zirconia antagonist under a 49-N load with thermocycling conditions for 120 000 cycles. The antagonist was horizontally displaced back and forth at a 2-mm distance and a frequency of 1.6 Hz. The quantification of the volume loss and the maximal wear depth of the worn specimens were recorded, while the wear characteristics were assessed with a scanning electron microscope (SEM). Data were analyzed using the Kruskal-Wallis test followed by pairwise comparison tests (α=.05).</div></div><div><h3>Results</h3><div>Significantly different wear depths and volume losses were found among groups (<em>P</em>&lt;.05). The highest wear depth and volume loss were observed in the VIPI Block (0.513 ±0.147 mm and 3.094 ±0.790 mm³), followed by Cosmo HXL group (0.312 ±0.020 mm and 1.446 ±0.134 mm³), Major Dent (0.261 ±0.034 mm and 1.219 ±0.196 mm³), Ivotion Dent (0.253 ±0.021 mm and 1.082 ±0.089 mm³), and NextDent C&amp;B MFH (0.208 ±0.059 mm and 0.843 ±0.372 mm³). Based on the analysis of the SEM images, distinct groups of specimens exhibited varying degrees of crack formation. Furthermore, their worn surfaces showed diverse characteristics in terms of wear patterns and roughness attributes.</div></div><div><h3>Conclusions</h3><div>The manufacturing methods for fabricating 3D printed, milled, and prefabricated denture teeth exhibit comparable wear resistance, with 3D printed denture teeth demonstrating the highest level of wear resistance.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 904.e1-904.e8"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142872402","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":"Sponsoring Organizations and Liaisons","authors":"","doi":"10.1016/S0022-3913(25)00164-7","DOIUrl":"10.1016/S0022-3913(25)00164-7","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Page A2"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593167","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 mechanical properties and microstructure of Co-Cr dental alloys manufactured by casting, milling, and 3D printing","authors":"Ana Schettini DMD ,&nbsp;Igor J. Pesun DMD, MS ,&nbsp;Rodrigo França DMD, MS, PhD","doi":"10.1016/j.prosdent.2024.12.017","DOIUrl":"10.1016/j.prosdent.2024.12.017","url":null,"abstract":"<div><h3>Statement of problem</h3><div>The mechanical properties and microstructure of cobalt chromium (Co-Cr) alloys should be considered when choosing the best alloy for each clinical situation. More information is needed on the digital manufacturing methods of metals in dentistry, such as computer numerical control (CNC), and direct laser metal sintering (DMLS).</div></div><div><h3>Purpose</h3><div>The aim of this study was to investigate the effect of the 3 different Co-Cr manufacturing processes on the mechanical properties and microstructure of Co-Cr dental alloys.</div></div><div><h3>Material and methods</h3><div>Dumbbell-shaped specimens (n=6) were fabricated using casting (CAST), CNC, and DMLS techniques. Tensile, 3-point bend, and microhardness testing were performed, and the microstructure evaluated through scanning electron microscopy, energy dispersive X-ray analysis, and X-ray diffraction analysis. The ANOVA test followed by post hoc Tukey tests were used for statistical analysis (α=.05).</div></div><div><h3>Results</h3><div>DMLS showed the greatest values for 0.2% yield strength (908.0 ±13.1 MPa), tensile strength (1123.7 ±6.5 MPa), flexural strength (2273.0 ±43.2 MPa), and microhardness (438.2 ±44.9 HV), followed by CAST and CNC. No statistical differences were found for elongation between CNC and DMLS or DMLS and CAST (<em>P</em>&gt;.05). No statistical differences were found in elastic modulus among all groups (<em>P</em>&gt;.05). EDX revealed a slightly different chemical composition among the groups. XRD showed face-centered cubic as the dominant phase and a small amount of hexagonal close-packed structure in all groups. A peak of σ phase was identified in the CAST group.</div></div><div><h3>Conclusions</h3><div>The mechanical properties and microstructures of Co-Cr dental alloys were significantly influenced by the fabrication method used. DMLS and CNC milling produced better products that traditional methods, leading to the improved durability and reliability of dental prostheses. These advancements underscore the importance of selecting appropriate fabrication methods to optimize clinical outcomes and patient satisfaction.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 906.e1-906.e7"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142909811","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}