Printable PICN Composite Mechanically Compatible with Human Teeth
Printable PICN Composite Mechanically Compatible with Human Teeth
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DOI：
10.1177/00220345211012930
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发表时间：
2021-05
影响因子：
7.6
通讯作者：
M. Sodeyama;H. Ikeda;Y. Nagamatsu;C. Masaki;R. Hosokawa;H. Shimizu
中科院分区：
文献类型：
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作者：
M. Sodeyama;H. Ikeda;Y. Nagamatsu;C. Masaki;R. Hosokawa;H. Shimizu
聚合物渗透陶瓷网络（PICN）复合材料与人类牙釉质机械相容，因此是有前途的牙科修复材料。用于牙齿修复材料的 PICN 复合材料的制造技术已通过计算机辅助设计/计算机辅助制造 (CAD/CAM) 铣削建立，但迄今为止，尚未成功开发使用 3 维 (3D) 打印。本研究旨在开发一种可 3D 打印的 PICN 复合材料作为修复材料。 PICN复合材料是使用基于3D打印的特定方法制造的。生产了含有高浓度二氧化硅纳米粒子的可 3D 打印前体浆料，并使用立体光刻 (SLA) 进行 3D 打印。将3D打印的物体进行烧结以获得纳米多孔物体，随后用树脂单体进行渗透和聚合。采用三种不同的制造条件组合来生产 3D 打印的 PICN 复合材料，并根据微观结构、机械性能、无机含量、物理化学性能和整体收缩率对其进行表征。 3D 打印的 PICN 复合材料还与 2 种市售 CAD/CAM 复合材料块（即 PICN 复合材料和分散填料复合材料）进行了比较。 3D 打印的 PICN 复合材料呈现出纳米级双网络结构，包含二氧化硅骨架和渗透树脂。 3D 打印的 PICN 复合材料表现出与牙釉质相似的维氏硬度和与牙本质相似的弹性模量。 3D 打印的 PICN 复合材料表现出与 CAD/CAM 块相当的弯曲强度（>100 MPa），以及实际使用中可接受的吸水性和溶解度。此外，3D 打印的模型冠在烧结过程中经历了各向同性收缩，没有发生致命的变形。总体而言，这种可 3D 打印的 PICN 复合材料作为具有与人类牙齿相似机械性能的修复材料的潜力得到了成功证明。
Polymer-infiltrated ceramic network (PICN) composites are mechanically compatible with human enamel, and are therefore promising dental restorative materials. Fabrication technology for PICN composites used in tooth restorative material has been established through computer-aided design/computer-aided manufacturing (CAD/CAM) milling, however, to date, has not been successfully developed using 3-dimensional (3D) printing. This study aimed to develop a 3D-printable PICN composite as a restorative material. The PICN composite was fabricated using a specific method based on 3D printing. A 3D-printable precursor slurry containing a high concentration of silica nanoparticles was produced and 3D-printed using stereolithography (SLA). The 3D-printed object was sintered to obtain a nano-porous object, and subsequently infiltrated and polymerized with resin monomer. Three different fabrication condition combinations were used to produce the 3D-printed PICN composites, which were characterized based on microstructure, mechanical properties, inorganic content, physicochemical properties, and overall shrinkage. The 3D-printed PICN composites were also compared to 2 commercially available CAD/CAM composite blocks, namely a PICN composite and a dispersed-filler composite. The 3D-printed PICN composites exhibited a nano-sized dual-network structure comprising a silica skeleton with infiltrated resin. The 3D-printed PICN composite exhibited a similar Vickers hardness to enamel, and a similar elastic modulus to dentin. The 3D-printed PICN composite exhibited comparable flexural strength (>100 MPa) to the CAD/CAM block, and acceptable water sorption and solubility for practical use. Further, the 3D-printed model-crown underwent isotropic shrinkage during sintering without fatal deformation. Overall, the potential of this 3D-printable PICN composite as a restorative material with similar mechanical properties to human teeth was successfully demonstrated.