The effect of bioactive glass and sintering conditions on the properties of titanium-hydroxyapatite composites
Titanium-hydroxyapatite (Ti-HA) based composites have been widely investigated as viable materials to be used in dentistry. However, sintering of these composites is very challenging due to decomposition of HA and oxidation of Ti. The objective of this study was to investigate the effect of inco...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Penerbit Universiti Kebangsaan Malaysia
2021
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| Online Access: | http://journalarticle.ukm.my/17181/ http://journalarticle.ukm.my/17181/1/19.pdf |
| Summary: | Titanium-hydroxyapatite (Ti-HA) based composites have been widely investigated as viable materials to be used in
dentistry. However, sintering of these composites is very challenging due to decomposition of HA and oxidation of Ti.
The objective of this study was to investigate the effect of incorporating a bioactive glass in Ti-HA composites sintered in
different atmospheric conditions. The bioactive glass was prepared and added to different percentages of Ti-HA mixtures
and divided into two groups. Samples in Group 1 were sintered with air atmosphere, while samples in Group 2 were
sintered with vacuum furnace. All samples were later subjected to XRD, SEM, density, micro-hardness, and compression
strength tests. XRD results showed that in Group 1, the major phases were assigned to Ti and HA while the minor phases
were assigned to oxidised Ti. Whereas, Group 2 showed that the major phases were assigned to HA and the minor phases
showed decomposition of HA to Ca3
(PO4
)2 (TCP) and Ca4
(PO4
)2
O (TTCP). Oxidized Ti was also present in this group. In
terms of density, micro-hardness and compression strength, statistical analyses showed that samples in Group 1 have a
significant difference (p = 0.000) as compared to those in Group 2. Sintering Ti-HA composites incorporated with BG
by using air atmosphere furnace could reduce the decomposition of HA and oxidation of Ti, thus improve the density,
micro-hardness and compression strength of the composites. |
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