A study of hydroxyapatite/calcium sulphate bioceramics

Yang, Danlei; Yang, Zi; Xu, Li; Di, Lizhi; Zhao, Hong

doi:10.1016/j.ceramint.2004.10.016

Cited by 17 publications

(10 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This indicates that the basic crystal structure of the PCL matrix in composites is still orthorhombic. For the composites, the reflection peaks at the angle of 20.8 and 11.5° are the characteristic peaks of CaSO 4 ·2H 2 O whiskers [26]. Results also show that the reflection peaks of the composites at the angle of 21.4° move slightly to the larger angles compared to the pure PCL.…”

Section: Results and Discussion 31 Morphology Of Fracture Surfacessupporting

confidence: 56%

“…of about 21.4, 22.0 and 23.7°, corresponding to the (110), (111) and (200) planes of the orthorhombic crystal structure respectively [25]. XRD pattern of pure CS whisker indicates that the CS whisker in this experiment is CaSO 4 #2H 2 O [26]. Comparing the XRD pattern of the pure PCL with composite, it can be found that the strong reflections observed from PCL are also present in PCL/CS whisker composites.…”

Section: Results and Discussion 31 Morphology Of Fracture Surfacesmentioning

confidence: 99%

See 1 more Smart Citation

Fabrication and characterization of polycaprolactone/calcium sulfate whisker composites

Liu¹,

Reni²,

Wei³

et al. 2011

Express Polym. Lett.

View full text Add to dashboard Cite

Abstract. Polycaprolactone (PCL)/calcium sulfate (CS) whisker composites have been fabricated by melt blending and coprecipitation methods respectively. Scanning electron microscope (SEM) was used to observe the microstructure of the composites. The crystallization and thermal properties were characterized by polarized optical microscope (POM), X-ray diffractometry (XRD), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). For composites prepared by melt blending method, experiment results show that average length of the whiskers is shortened. The crystallization perfection of PCL in composites is improved by adding whiskers. The flexural strength increases whereas the impact strength decreases. For composites prepared by coprecipitation method, whisker addition worsens the crystallization perfection of PCL. An improvement of 21% in flexural strength and 22% in impact strength has been achieved for the composite with 15 wt% of whiskers.

show abstract

Section: Results and Discussion 31 Morphology Of Fracture Surfacessupporting

confidence: 56%

Section: Results and Discussion 31 Morphology Of Fracture Surfacesmentioning

confidence: 99%

Fabrication and characterization of polycaprolactone/calcium sulfate whisker composites

Liu¹,

Reni²,

Wei³

et al. 2011

Express Polym. Lett.

View full text Add to dashboard Cite

show abstract

“…It could be found in the patterns that the scaffolds were composed of HAp and CaSO 4 crystalline phase by comparison with the standard XRD pattern of HAp (JCPDS 72-1243) and CaSO 4 (JCPDS 70-0909). There were no other phases generated during the sintering process, which was in accordance with previous results of another researcher [28]. It was demonstrated that nHAp remained stable in the matrix, which could be compatible with CaSO 4 .…”

Section: Phase and Microstructuressupporting

confidence: 79%

Tunable Degradation Rate and Favorable Bioactivity of Porous Calcium Sulfate Scaffolds by Introducing Nano-Hydroxyapatite

Zhou

Yuan

Peng³

et al. 2016

Applied Sciences

View full text Add to dashboard Cite

The bone scaffolds should possess suitable physicochemical properties and osteogenic activities. In this study, porous calcium sulfate (CaSO 4 ) scaffolds were fabricated successfully via selected laser sintering (SLS). Nano-hydroxyapatite (nHAp), a bioactive material with a low degradation rate, was introduced into CaSO 4 scaffolds to overcome the overquick absorption. The results demonstrated that nHAp could not only control the degradation rate of scaffolds by adjusting their content, but also improve the pH environment by alleviating the acidification progress during the degradation of CaSO 4 scaffolds. Moreover, the improved scaffolds were covered completely with the apatite spherulites in simulated body fluid (SBF), showing their favorable bioactivity. In addition, the compression strength and fracture toughness were distinctly enhanced, which could be ascribed to large specific area of nHAp and the corresponding stress transfer.

show abstract

“…At higher pH values reaction (3) was suppressed. Therefore, despite of the initial composition, the Ca/P ratio of the precipitate might reach a value near to 1.667 and there was only one kind of calcium phosphate phase, namely HA, in the glass [27].…”

Section: +mentioning

confidence: 97%

Synthesis, Characterization, and In Vitro Bioactivity of Sol‐Gel‐Derived Zn, Mg, and Zn‐Mg Co‐Doped Bioactive Glasses

2010

View full text Add to dashboard Cite

Bioactive glasses in the systems CaO-SiO 2 -P 2 O 5 -ZnO, CaO-SiO 2 -P 2 O 5 -MgO, and CaO-SiO 2 -P 2 O 5 -MgO-ZnO were prepared and characterized. Bioactive glass powders were produced by the sol-gel method. The prepared bioactive glass powders were immersed in a simulated body fluid (SBF) for periods of up to 28 days at 310 K to investigate the bioactivity of the produced samples. Inductively coupled plasma (ICP) and ultraviolet (UV) spectroscopic techniques were used to detect changes in the SBF composition. X-Ray diffraction (XRD) was utilized to recognize and confirm the formation of a hydroxyapatite (HA) layer on the bioactive glass powders. Microstructural characterizations of the bioactive glass samples were investigated by scanning electron microscopy (SEM) techniques. Density, porosity, and surface area values of bioactive glass powders were also determined in order to characterize the textural properties of the samples. The results revealed the growth of an HA layer on the surface of the bioactive glass samples. MgO in the glass sample increases the rate of formation of an HA layer while ZnO in the glass slows it down.

show abstract

A study of hydroxyapatite/calcium sulphate bioceramics

Cited by 17 publications

References 5 publications

Fabrication and characterization of polycaprolactone/calcium sulfate whisker composites

Fabrication and characterization of polycaprolactone/calcium sulfate whisker composites

Tunable Degradation Rate and Favorable Bioactivity of Porous Calcium Sulfate Scaffolds by Introducing Nano-Hydroxyapatite

Synthesis, Characterization, and In Vitro Bioactivity of Sol‐Gel‐Derived Zn, Mg, and Zn‐Mg Co‐Doped Bioactive Glasses

Contact Info

Product

Resources

About