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Effect of CaSO4 Dissolution-Precipitation Time on Formation of Porous Carbonate Apatite as Bone Replacement Material
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Effect of CaSO4 Dissolution-Precipitation Time on Formation of Porous Carbonate Apatite as Bone Replacement Material

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Abstract:

Introduction: Carbonate apatite type B (C-Ap) has been used as a bone replacement material because of its osteoconductive properties. Clinically, the pores formed in bone replacement material aid in cell mobility and nutrient supply, thereby increasing the bone regeneration ability. CO32- ions found in this material are useful for maintaining a stable physiological environment in the bone in order for it to be easily absorbed by osteoclasts. Porous C-Ap type B is formed using the dissolution–precipitation method by immersing porous anhydrous CaSO4 in a mixture of carbonate and phosphate solutions. Purpose: The present study aimed to evaluate the effect of immersion ofCaSO4using the dissolution–precipitation method on the formation of porous C-Ap type B with calcium sulfate precursor hemihydrate. Method: Porous C-Ap type B was produced usinga mixture of calcium sulfate hemihydrate precursors with 50 wt% polymethylmethacrylate (PMMA) porogen and distilled water. After hardening, the calcium sulfate dihydrate containing PMMA was burned in an oven at 700°C for 4 h to remove the PMMA. The specimen was immersed in a mixture of sodium phosphate (Na3PO4) and sodium carbonate (Na2CO3) for 6, 12, and 24 h. Phase testing through X-ray diffraction (XRD) using CuKα radiation at 40 kV and 40 mA was performed. Attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR, Thermo Fisher Scientific, Waltham, Massachusetts, USA) was used for detecting the functional groups of CO32- and PO42-. Results: XRD results showed the formation of C-Ap at 6 and 12 h, but the anhydrous CaSO4 phase remained; alternatively, this phase was absent after 24 h of immersion phase andFTIR showed the presence of the functional groups of CO32- compounds. Conclusion: Porous C-Ap type B can be formed from CaSO4 precursors after 24 h of immersion using the dissolution–precipitation method.

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Journal of Biomimetics, Biomaterials and Biomedical Engineering Vol. 44 View Preview

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Periodical:

Journal of Biomimetics, Biomaterials and Biomedical Engineering (Volume 44)

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83-90

DOI:

https://doi.org/10.4028/www.scientific.net/JBBBE.44.83

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Online since:

February 2020

Authors:

Yosi Kusuma Eriwati*, Arsista Dede, Triaminingsih Siti, Sunarso Sunarso

Keywords:

Calcium Sulfate Hemihydrate, Dissolution-Precipitation, Porogen PMMA, Porous Carbonate Apatite Type B

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