Dr Changxiang Wang BEng MEng PhD

Dr Changxiang Wang

School of Dentistry
Research Fellow

Changxiang is a Research Fellow at the School of Dentistry in the Institute of Clinical Sciences. His research expertise includes materials science and engineering, biomaterials, and tissue engineering. Currently, Changxiang is working on toothpaste formulations and toothbrush design. 


  • PhD in Biomedical Engineering (Biomaterials), Sichuan University, China - 1997
  • MEng in Surface Science and Corrosion Engineering, Institute of Corrosion & Protection of Metals Chinese Academy of Sciences, China - 1993
  • BEng in Surface Science and Corrosion Engineering, Beijing University of Science &Technology, China - 1990 


Changxiang was awarded a BEng degree in Surface Science and Corrosion Engineering by Beijing University of Science & Technology in 1990. He then undertook his MEng in Surface Science and Corrosion Engineering at Institute of Metal Research, Chinese Academy of Sciences, which he completed in 1993. He obtained his PhD in Biomedical Engineering (Biomaterials) from Sichuan University in 1997.

After two years working on the functionally graded calcium phosphate coatings at West China University of Medical Sciences, Changxiang joined Nanyang Technological University in 1999 and worked on surface modification of titanium and its alloys by using electrochemical impedance spectroscopy.     

He moved to UK since 2001 and worked as a Research Fellow at University of Birmingham. After two years working at University of Portsmouth, Changxiang returned to University of Birmingham in 2008 as a Research Fellow to work on toothpaste formulations and toothbrush design.

He has authored/co-authored a large number of research papers and has given many presentations. Changxiang has served on the Editorial Board of Chinese Journal of Biology. He is a frequent reviewer for international scientific journals in the fields of materials science and engineering, biomaterials, and tissue engineering.

Postgraduate supervision

  • 9 undergraduate students (3 in Birmingham University, 2 in Portsmouth, 2 in Singapore, and 2 in China)
  • 7 MSc students (Birmingham University)
  • 1 PhD student (University of Birmingham, co-supervision)


Assessment of toothpaste abrasives and design of toothbrushes

Work significantly funded by Industry utilises profilometry, gloss measurements and SEM to investigate mechanistic actions of dental dentifrices in oral hygiene and tissue wear.

High Strain-rate Micro-compression Tester

 A novel instrument was developed that allows the material properties of the walls of cells and microcapsules to be characterised. Because of the high strain rates, high quality information were obtained on wall viscoelastic behaviour and (where it occurs) water loss through porous walls. Amongst other applications, these will allow differences between growing and mature plant cell walls to be   determined. The research was a unique combination of micromanipulation, piezo-electric technology, a high-speed camera, image analysis, and finite element modelling.

The nucleation and growth of apatite on chemically treated titanium

Electrochemical impedance spectroscopy (EIS) measurement was used to investigate the nucleation and growth of apatite on chemically treated pure titanium immersed in the SBF solution. An appropriate equivalent circuit model was constructed to describe the nucleation and growth of apatite. It may quantify apatite growth on pretreated titanium substrates.

Functionally graded calcium phosphate coatings

To improve the properties of coatings and the bond strength between the coating and the substrate, attempts were made to develop functionally graded coatings (FGCs) of calcium phosphate and titanium. The FGCs were produced by sequentially Ar+ ion beam sputtering/mixing calcium phosphate and calcium phosphate/Ti targets (from the 100% Ti target to the 0% Ti target).

Other activities

Member of:

  •  International Association of Dental Research (IADR)
  •  British Society for Dental Research (BSDR)
  •  Society for Mechanical Engineering, Sichuan Province, China
  •  UK Society for Biomaterials, U.K.


  • Stenson J, Hartley P, Wang CX, Thomas C (2011), Determining the mechanical properties of yeast cell walls. Biotechnology Progress 27(2):505-512.
  •  Dintwa E, Jancsok P, Mebatsion HK, Verlinden B, Verboven P, Wang CX, Thomas CR, Tijskens E, Ramon H, Nicolai B (2011), A finite element model for mechanical deformation of single tomato suspension cells. Journal of Food Engineering 103: 265-272.
  • Nguyen VB, Wang CX, Thomas CR, Zhang Z (2009), Mechanical properties of single alginate microspheres determined by microcompression and finite element modelling. Chemical Engineering Sciences 64: 821-829.
  •  Wang CX, Tong J (2008), Interfacial strength of novel PMMA/HA/nanoclay bone cement. Bio-Medical Materials and Engineering 18: 367-375.
  •  Wang CX, Wang L, McQueen-Mason SJ, Pritchard J, Thomas CR (2008), pH and Expansin Action on Single Suspension-Cultured Tomato. Cells. Journal of Plant Research 121, 527-534.
  •  Wang CX, Pritchard J, Thomas CR (2006), Investigation of the mechanics of single tomato fruit cells. Journal of Texture Studies 37, 597-606.
  •  Wang CX, Cowen C, Zhang Z, Thomas CR (2005), High Speed Compression of Single Alginate Microspheres. Chemical Engineering Sciences 60, 6648-6656.
  •  Wang CX, Zhou X, Wang M (2004), Influence of Sintering Temperatures on Hardness and Young’s Modulus of Tricalcium Phosphate Bioceramic by Nanoindentation Technique. Materials Characterization 52(4-5), 301-307.

View all publications in research portal