Glass - Back to the Future!

Presenting Author:
Louis Forto Chungong

article posted 22 March 2016

Louis Forto Chungong graduated from Umeĺ University, Sweden, with an MSc in Physics. His MSc projects were on synthesis and characterization of hydrogenated C60 and crystal growth of C70H36. He joined Aston University in 2015 and started a PhD on atomic scale structural characterization of glasses for biomedical applications using a range of experimental techniques such as neutron and X-ray diffraction and solid state NMR.

Structural characterisation of novel calcium zinc silicates/germanate glasses

Louis Forto Chungong1*, Alex C Hannon2, Adam F Lee1 & Richard A Martin1
1 School of Engineering and Applied Science, Aston University, Birmingham, B4 7ET, UK
2 ISIS Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, OX11 0QX, UK

Bone cements are widely used to treat fractured or collapsed vertebra (veterbroplasty and kyphoplasty procedures). The cements are injected through a small hole in the skin into the fractured vertebra before setting. The cements must therefore have suitable working and setting times for clinical use. Traditionally glass ionomer cements (GICs) contain alumina-silicate glasses in a poly-acrylic acid. Aluminium is known to be beneficial for tailoring working and setting times. However concerns have been raised about the potential toxicity of Al. Consequently there is need to develop Al free GICs. To date it has been difficult to optimise the setting and working times for Al free GICs. Recently a series of calcium zinc silicates/germanates have been developed which show excellent handling and setting characteristics that closely match the required working times for minimal invasive surgical procedures. It is important to develop composition–structure–property relationships in order to fully understand these materials and to enable further design and optimisation. The present study investigates the atomic scale structural of these glasses using X-ray and neutron diffraction and solid state 29Si NMR.