Effect of Alumina Addition on 45S5 Bioglass |
P. Dey*, S. K. Pal and R. Sarkar
pages: 105-109
DOI: 10.1080/0371750X.2014.922423 |
Abstract |
Bioglass is particularly recognized for its excellent biocompatibility and bioactive traits. Also it is prominently
known for its bone bonding capability. One of the chief applications of bioglass is as an artificial bone graft meant
for orthopaedic as well as periodontal purpose. Even though it is a promising material but due to the poor mechanical
properties as compared to cortical bone, its use has been restricted. Along with poor mechanical properties, 45S5
crystallizes rapidly when it is heated above Tg; as a result its bioactivity is decreased. A possible solution towards
this problem is addition of alumina in the glass structure.
In this communication, effect of alumina addition on 45S5 has been reported. The alumina was added in 5, 2.5 and
1 wt% to the 45S5 composition by adjusting with silica content, during preparation via the sol-gel route. The
samples so prepared were characterized using XRD, FESEM, bioactivity tests using simulated body fluid (SBF) and
mechanical tests by universal testing machine (UTM). The modification in the composition of 45S5 has been done
in order to increase the temperature range between glass transition and crystallization. The addition of alumina
was also preferred in order to enhance the mechanical properties so that application of 45S5 can be broadened in
the field of orthopaedic as well as periodontal. |
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