Summary Of Hydroxyapatite (HA)

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Hydroxyapatite (HA) has been studied for their excellent performances which are suitable for use in bone defects or regeneration of bone. Hydroxyapatite (HA) has poor mechanical properties which make it limited used in a load bearing area. In this case, sodium alginate (SA) was used to be mixed with hydroxyapatite (HA) by using precipitation method to increase the mechanical and physical properties. The mixing of hydroxyapatite/sodium alginate effectively increases the densification and hardness of hydroxyapatite. It could contribute to the development of the artificial implants of hydroxyapatite (HA) for bone implants applications in load bearing area. The behaviors during densification were studied together with the mechanical properties …show more content…
These are similar to mineral component that present in bones and hard tissues (Ilie et al., 2016). The combination of ceramic based materials - hydroxyapatite and natural polymer as sodium alginate will provide strength, stiffness and fracture toughness to bone (S. Lala et al., 2016). The composite materials have been used in load bearing application such as filler and bone defect.
Alginate (Alg) is a natural polymer which synthesized from brown algae. Alginate is more prefer to be used due to its biocompatibility, low cost and low toxicity. In this work, sodium alginates (SA) were used to investigate the physical and mechanical properties. Sodium alginate act as a hydrophilic and it can be dissolved in water but not entirely soluble (Ilie et al.,
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The mixed powders are sinter at two different temperatures which is about 1000°C and 1100°C. The mixing process was carried out by using hot plate and magnetic stirrer. The pure hydroxyapatite were mixed at 2 hours with distilled water and for another two hours the sodium alginate was put into the solution to completely mixed to produce the suspension. The suspension powder has to left overnight to get the precipitate solution. Next, the precipitation solutions were dried at 24 hours for 80°C.
Then, the dried sample was crushed and sieved to obtain the fine powders. The 1 grams of mixed powder are compacted at 2.5MPa load by using stainless steel mold (13mm). The mold should be clean by using WD40 or silicon spray which act as a lubricant to remove dirt and to remove the sample easily after

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