The effects of excess calcium on the handling and mechanical properties of hydrothermal derived calcium phosphate bone cement

Razali, Nurul Nadirah and Sukardi, Mohd Amirul and Sopyan, Iis and Mel, Maizirwan and Mohd. Salleh, Hamzah and Rahman, Md Mujibur (2018) The effects of excess calcium on the handling and mechanical properties of hydrothermal derived calcium phosphate bone cement. In: International Conference on Advances in Manufacturing and Materials Engineering 2017 (ICAMME17), 8th-9th August 2017, Kuala Lumpur, Malaysia.

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Abstract

The objective of this study is to determine the effects of excess calcium on the handling and mechanical properties of hydrothermal derived calcium phosphate cement (CPC) for bone filling applications. Hydroxyapatite powder was synthesized via hydrothermal method using calcium oxide, CaO and ammonium dihydrogen phosphate, NH4H2PO4 as the calcium and phosphorus precursors respectively. The effects of calcium excess were evaluated by varying the CaO content at 0, 5 and 15 mole %. The precursors were then refluxed in distilled water at 90-100˚C and dried overnight until the calcium phosphate powder was formed. CPC was then produced by mixing the synthesized powder with distilled water at the powder-toliquid (P/L) ratio of 1.5. The result from the morphological properties of CPC shows the increase in agglomeration and particles size with 5 mole % of calcium excess but decreased with 15 mole % of calcium excess in CPC. This result was in agreement with the compressive strength result where the CPC increased its strength with 5 mole % of calcium excess but reduced with 15 mole % of calcium excess. The excess in calcium precursor also significantly improved the setting time but reduced the injectability of CPC.

Item Type:	Conference or Workshop Item (Plenary Papers)
Additional Information:	4809/62772
Uncontrolled Keywords:	calcium, hydrothermal, calcium phosphate bone cement
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Biotechnology Engineering Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	PROF. DR. IIS SOPYAN
Date Deposited:	21 Mar 2018 10:35
Last Modified:	10 Aug 2018 16:06
URI:	http://irep.iium.edu.my/id/eprint/62772

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