Researchers at the Indian Institute of Science (IISc) in Bangalore have proposed a new approach for developing orthopedic implants with better ability to bond with the bone.
Currently, orthopedic implants for knee and hip arthroplasty are made of metallic alloys that contain potentially toxic elements like aluminum, vanadium and nickel. They are also much stiffer than human bone and don’t bond well with the bone.
The research team at IISc has developed a strategy to increase the bioactivity of titanium alloy consisting of non-toxic elements - titanium, niobium and tin, through surface severe plastic deformation (metal working techniques). This approach could help produce new titanium alloys that are less stiff compared to currently used. The researchers have published a report on their work in the journal ‘ACS Biomaterials Science & Engineering.’
The researchers used a technique known as surface mechanical attrition treatment (SMAT) to boost bioactivity of alloy’s surface. In this technique, the metal alloy sheet is placed inside a chamber containing hard steel balls typically used in ball bearings. The chamber is vibrated using electromechanical means because of which the balls start to move randomly at high speed inside the chamber.
“The SMAT treatment deforms surface of the metal sheet, which leads to increase in surface hardness, modification in surface roughness and surface wettability and its chemistry. These modifications are responsible for increasing biological activity of the metal,” explained Dr Kaushik Chatterjee, who led the research, while speaking to India Science Wire.
SMAT can improve biomechanical properties like fatigue and wear resistance, added Dr Sumit Bahl, lead author of the study. The equipment used for the experiment was developed in collaboration with a Bengaluru company.
"The study has shown that traditional metal processing techniques can be still used to improve the cell-material interaction of new class of titanium alloys," commented Dr T.S. Sampath Kumar of Indian Institute of Technology, Madras, who was not connected with the study.
The research team included Sai Rama Krishna Meka, Sumit Bahl, Satyam Suwas, and Kaushik Chatterjee. The study was supported by the Science and Engineering Research Board (SERB).
Twitter handle: @ratnesh_thakur
(India Science Wire)
Comments
Comments have to be in English, and in full sentences. They cannot be abusive or personal. Please abide by our community guidelines for posting your comments.
We have migrated to a new commenting platform. If you are already a registered user of TheHindu Businessline and logged in, you may continue to engage with our articles. If you do not have an account please register and login to post comments. Users can access their older comments by logging into their accounts on Vuukle.