Degradable Phosphate Based Fibers
Bihan Chen
BME 240: Introduction to
Clinical Medicine
In a
study done by Rathbone et al., the researchers explored reconstructive
options of the ACL. They looked at the efficacy and efficiency of using
a degradable phosphate based glass fiber to promote cell growth. The
fibers are made of NaO, CaO, P2O5, MnO, B2O3, Na-F and Fe2O3 and its
mechanical properties (after tensile testing) indicate that they
possess a high tensile strength, a high stiffness and a high resistance
to fracture (stiffness and resistance both greater than ACL). Below is
some fluromicroscopy and SEM imaging of the glass fibers and cell
proliferation:
Cell proliferation was supported on the fibers samples and the glass
fibers show adequate strength for a cell culture scaffold to be used
for tissue engineering of an ACL.
The down side is
that they are very stiff and so the researchers are now hypothesizing
of having a composite made from glass fiber and polymer to introduce
some elasticity.