| Type | Conference |
|---|---|
| Title | ‘IN-VITRO’ BIOACTIVITY STUDY OF SYNTHETIC WOLLASTONITE PRODUCED FROM MALAYSIAN LIMESTONE AND SILICA SAND |
| Source | RTC 060 |
| Author | A. R. Rashita |
Wollastonite (CaO.SiO2 or CaSiO3) is an
industrial mineral comprising of calcium,
silicon and oxygen. Synthetic wollastonite was
synthesised via solid state reaction using
Malaysian limestone and silica sand. The invitro bioactivity was investigated by soaking the
synthetic wollastonite pellet in simulated body
fluid (SBF) solution for 1, 3, 5, 7 and 14 days at
36.5oC. XRD revealed the presence of
hydroxyapatite phase as the soaking time of
synthetic wollastonite pellet in SBF was
increased. SEM coupled with EDX showed the
formation of granules of agglomerated apatite
particles on the surface of the soaked synthetic
wollastonite pellet. During the formation of
apatite, phosphate ions from SBF solution were
consumed and this was confirmed by ICP where
the concentration of the ions decreased after the
soaking process. FTIR showed that the peaks
for phosphate and carbonate ions increased
when the apatite layer formed on the surface of
synthetic wollastonite pellet. This study
indicated that synthetic wollastonite produced
from Malaysian limestone and silica sand was
bioactive and may be used for preparation of
implantable biomaterial.