Structural Design and Experimental Analysis of a Selective Laser Sintering System with Nano-Hydroxyapatite Powder

Shuai, Cijun; Gao, Chengde; Nie, Yi; Hu, Huanglong; Qu, Hongyi; Peng, Shuping

doi:10.1166/jbn.2010.1139

Cited by 49 publications

(28 citation statements)

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“…When ZrO 2 was added, some spherical particles were unevenly distributed on CS-Zr surface and some spherical agglomerates can be observed. C. Shuai's research showed that the particles of hydroxyapatite grow gradually and tend to become spherical-like shape from the initial needle-like shape, and the newly developed hydroxyapatite meets the requirements for the mechanical and biological properties of bone [58,59]. In addition, some cracks appeared on the sample surface, which may be caused by the higher local surface tension in drying process.…”

Section: Mechanical Properties Of Ceramicsmentioning

confidence: 99%

Effect of zinc oxide and zirconia on structure, degradability and in vitro bioactivity of wollastonite

Wang

Chen

2015

Ceramics International

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Section: Mechanical Properties Of Ceramicsmentioning

confidence: 99%

Effect of zinc oxide and zirconia on structure, degradability and in vitro bioactivity of wollastonite

Wang

Chen

2015

Ceramics International

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“…Its structure is shown in Figure 1. There are many methods in the preparations of nano-HA material [7][8][9][10][11][12][13][14][15] , which can be, in general, divided into wet and dry methods. The wet method includes the precipitation method, hydrothermal method, sol-gel method, ultrasonic synthesis, micro-emulsion method and ultrasonic synthesis method, and so on.…”

Section: +mentioning

confidence: 99%

“…As matter of fact, the bone is a kind of flexible and toughening polymer composed of hydroxyapatite-based composites. The composition and structure of artificial-hydroxyapatite are very similar to inorganic components in human bone tissues [4][5][6][7][8][9][10][11][12][13][14][15] , it has a non-toxicity and non-irritant property, and is also non-allergenic, non-mutagenic and carcinogenic, and can generate a chemical reaction with bone to change bone conduction [16][17][18][19] . Therefore, nano-hydroxyapatites have Institute of Physical Electron and Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054, P.R.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Biological Property of Nanohydroxyapatite Materials

Pang¹,

Internationals²

2017

JNMS

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The biological effects of nanohydroxyapatites and its cell toxicity have been studied using the MTT and ALP method, infrared spectrum of absorption and electrophoresis method, respectively. The nanohydroxyapatites are prepared and made by using Sol-gel method, in which the parameters of process and reaction are controlled as: pH > 9, Ca / P = 1.67, sintering temperature of 1100ºC and sintering time 2 hours. Studied results show that nanohydroxyapatites can interact with human serum albumin and change its second structure and weight of molecules. We find that the nanohydroxyapatites and complex of nano HAP+ nanoCrO 2 can all restrain the proliferation of MG63 cells, but their toxicities are first degree or minor, the toxicity of the complex is smaller than that of pure nanohydroxyapatites.Keywords: Nanohydroxyapatite; Cell proliferation; Biological function; Toxicity; Infrared spectrum; Electrophoresis; Human serum albumin; Molecular structure Research ArticleOpen Access Investigation of Biological Property of Nanohydroxyapatite Materialswidely applications in biological hard tissues, such as human bones, teeth and vascular stents, as repaired and replacement materials, such as in oral implantology for increasing dental spine, ear bone or spine replacement, etc., allowing better results compared to those using metals and polymers. However, the biological effects of nanohydroxyapatites and its toxicity have been not studied systematically as yet . Therefore, it is very necessary to investigate their biological effects and toxicity for its wide applications in biology. This paper will describe a study of the problems by a novel method using light spectrum technique. It is well known that the crystalline hydroxyapatite belongs to hexagonal system, has a L 6 PC symmetry and / m space group, its structure is hexagonal prism, with the surface of hexagon which is perpendicular to c-axis, angle between a and b-axes is 120°, its parameters of crystalline cell are a 0 = b 0 = 0.943 ~ 0.938 nm, c 0 = 0.688 ~ 0.686 nm, the unit cell contains 10 Ca 2+, 6 PO 4 3-and 2OH-. OH -in the cell is in the four corners, 10 Ca 2+ occupy two kinds of location, respectively, in which four Ca 2+ occupy the Ca (I) positions at z = 0 and z = 1/ 2, respectively, the locations 2 of 6 Ca 2+ are in the Ca (II) positions at z = 1 / 4, and z = 3 / 4, respectively, the three ligand center is composed of three 0 3 and 6PO 4 3-ligands, which are located at z = 1 / 4, and z = 3 / 4 on a plane. Therefore, HA has a good stability due to the tetrahedral structure of PO 4 3-. Its structure is shown in Figure 1. There are many methods in the preparations of nano-HA material [7][8][9][10][11][12][13][14][15] , which can be, in general, divided into wet and dry methods. The wet method includes the precipitation method, hydrothermal method, sol-gel method, ultrasonic synthesis, micro-emulsion method and ultrasonic synthesis method, and so on. The solid-state reaction method then belongs to the dry method. The sol-gel method is a new method for prepara...

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“…Nevertheless, incorporation of second-phase materials into ceramics, e.g., silicon carbide (SiC) [8], zirconia (ZrO 2 ) [9], aluminium oxide (Al 2 O 3 ) [10], silver oxide (Ag 2 O) [11] and titanium oxide (TiO 2 ) [12,13], makes it hard to acquire sufficient Porous scaffolds were constructed layer-by-layer using a homemade SLS equipment [26]. The sintering parameters were kept constant as follows: layer thickness of 0.12 mm and the laser power (1 mm focused beam diameter) of 7 W and scan speed of 100 mm/min.…”

Section: Introductionmentioning

confidence: 99%

Mechanically Strong CaSiO3 Scaffolds Incorporating B2O3-ZnO Liquid Phase

et al. 2017

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Calcium silicate (CaSiO 3 ) scaffolds were reinforced by introducing liquid phase. The liquid phase was made of B 2 O 3 and ZnO. The fracture toughness and compressive strength increased by 48% and 141%, respectively, compared with those of the scaffolds without the liquid phase. This was attributed to the enhanced densification, the elongated grains pull-out and the cracks bridging. In addition, because of its increasing mechanical properties, the fracture model of the cleavage fracture was more beneficial than the intergranular fracture. The mechanical properties of the scaffolds with the liquid phase could be steadily maintained and then they decreased slowly when immersed in simulated body fluid (SBF). Meanwhile, the hydroxyapatite (HAp) generated on their surfaces. In addition, the scaffolds possessed favorable biocompatibility and could promote cell proliferation. These results demonstrated that the scaffolds with B 2 O 3 -ZnO liquid phase are a promising substitute for bone repair applications.

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Structural Design and Experimental Analysis of a Selective Laser Sintering System with Nano-Hydroxyapatite Powder

Cited by 49 publications

References 0 publications

Effect of zinc oxide and zirconia on structure, degradability and in vitro bioactivity of wollastonite

Effect of zinc oxide and zirconia on structure, degradability and in vitro bioactivity of wollastonite

Investigation of Biological Property of Nanohydroxyapatite Materials

Mechanically Strong CaSiO3 Scaffolds Incorporating B2O3-ZnO Liquid Phase

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