Moritz Hoffmann , Bogna Stawarczyk , Jens Günster , Andrea Zocca
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In the fired state, density, shrinkage, flexural strength (FS), Weibull modulus, fracture toughness (K<sub>IC</sub>), Martens parameters, and microstructure were analyzed. Disc-shaped and bar specimens were also cut from commercially available CAD/CAM blocks and used as a target reference (TR) for the fired state.</p></div><div><h3>Results</h3><p>In the green state, CG showed the highest bulk density but the lowest FS, while the highest FS in the green state was achieved with the addition of a cross-linking ink. After firing, no significant differences in density and a similar microstructure were observed for all slip-cast groups, indicating that almost complete densification could be achieved. The CAD/CAM specimens showed the highest mean FS, Weibull modulus, and K<sub>IC</sub>, with significant differences between some of the slip-cast groups.</p></div><div><h3>Significance</h3><p>These results suggest that the investigated feedstocks are promising candidates for the slurry-based additive manufacturing of restorations meeting the class 1a requirements according to DIN EN ISO 6871:2019–01.</p></div>","PeriodicalId":380,"journal":{"name":"Journal of the Mechanical Behavior of Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":3.3000,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1751616124001954/pdfft?md5=523aca4195b1345897fdb72e4916d117&pid=1-s2.0-S1751616124001954-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Influence of additives and binder on the physical properties of dental silicate glass-ceramic feedstock for additive manufacturing\",\"authors\":\"Moritz Hoffmann , Bogna Stawarczyk , Jens Günster , Andrea Zocca\",\"doi\":\"10.1016/j.jmbbm.2024.106563\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Objectives</h3><p>The aim of the study was to investigate the impact of organic additives (binder, plasticizer, and the cross-linking ink) in the formulation of water-based feedstocks on the properties of a dental feldspathic glass-ceramic material developed for the slurry-based additive manufacturing technology “LSD-print.”</p></div><div><h3>Material and methods</h3><p>Three water-based feldspathic feedstocks were produced to study the effects of polyvinyl alcohol (AC1) and poly (sodium 4-styrenesulfonate) (AC2) as binder systems. 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引用次数: 0
摘要
材料和方法为研究聚乙烯醇(AC1)和聚(4-苯乙烯磺酸钠)(AC2)作为粘合剂体系的影响,生产了三种水基长石原料。不含有机添加剂的原料作为对照组(CG)进行测试。对圆盘状(n = 15)和棒状(n = 7)试样进行了滑铸,并对生坯和烧成坯进行了表征。在生坯状态下,测量了密度和抗折强度。在烧成状态下,分析了密度、收缩率、抗弯强度 (FS)、威布尔模量、断裂韧性 (KIC)、马腾斯参数和微观结构。结果在绿色状态下,CG 的体积密度最高,但 FS 最低,而加入交联油墨后,绿色状态下的 FS 最高。焙烧后,所有滑铸组的密度均无明显差异,且微观结构相似,表明几乎可以实现完全致密化。CAD/CAM试样显示出最高的平均FS、Weibull模量和KIC,某些滑铸组之间存在显著差异。这些结果表明,所研究的原料是基于浆料的增材制造修复体的理想候选材料,符合DIN EN ISO 6871:2019-01的1a级要求。
Influence of additives and binder on the physical properties of dental silicate glass-ceramic feedstock for additive manufacturing
Objectives
The aim of the study was to investigate the impact of organic additives (binder, plasticizer, and the cross-linking ink) in the formulation of water-based feedstocks on the properties of a dental feldspathic glass-ceramic material developed for the slurry-based additive manufacturing technology “LSD-print.”
Material and methods
Three water-based feldspathic feedstocks were produced to study the effects of polyvinyl alcohol (AC1) and poly (sodium 4-styrenesulfonate) (AC2) as binder systems. A feedstock without organic additives was tested as the control group (CG). Disc-shaped (n = 15) and bar (n = 7) specimens were slip-cast and characterized in the green and fired states. In the green state, density and flexural strength were measured. In the fired state, density, shrinkage, flexural strength (FS), Weibull modulus, fracture toughness (KIC), Martens parameters, and microstructure were analyzed. Disc-shaped and bar specimens were also cut from commercially available CAD/CAM blocks and used as a target reference (TR) for the fired state.
Results
In the green state, CG showed the highest bulk density but the lowest FS, while the highest FS in the green state was achieved with the addition of a cross-linking ink. After firing, no significant differences in density and a similar microstructure were observed for all slip-cast groups, indicating that almost complete densification could be achieved. The CAD/CAM specimens showed the highest mean FS, Weibull modulus, and KIC, with significant differences between some of the slip-cast groups.
Significance
These results suggest that the investigated feedstocks are promising candidates for the slurry-based additive manufacturing of restorations meeting the class 1a requirements according to DIN EN ISO 6871:2019–01.
期刊介绍:
The Journal of the Mechanical Behavior of Biomedical Materials is concerned with the mechanical deformation, damage and failure under applied forces, of biological material (at the tissue, cellular and molecular levels) and of biomaterials, i.e. those materials which are designed to mimic or replace biological materials.
The primary focus of the journal is the synthesis of materials science, biology, and medical and dental science. Reports of fundamental scientific investigations are welcome, as are articles concerned with the practical application of materials in medical devices. Both experimental and theoretical work is of interest; theoretical papers will normally include comparison of predictions with experimental data, though we recognize that this may not always be appropriate. The journal also publishes technical notes concerned with emerging experimental or theoretical techniques, letters to the editor and, by invitation, review articles and papers describing existing techniques for the benefit of an interdisciplinary readership.