The Effect of Bioactive Glass and Sintering Conditions on the Properties of Titanium-Hydroxyapatite Composites
Document Type
Article
Publication Date
1-1-2021
Abstract
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)2O (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. © 2021 Penerbit Universiti Kebangsaan Malaysia. All rights reserved.
Keywords
Bioactive glass, Composites, Compression strength, Hydroxyapatite, Sintering process, Titanium
Divisions
Dentistry,PHYSICS
Funders
FRGS Grant No. FP019-2017A from the Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
Publication Title
Sains Malaysiana
Volume
50
Issue
4
Publisher
Penerbit Universiti Kebangsaan Malaysia