Navigation Links
Radiation boost for artificial joints

A blast of gamma radiation could toughen up plastic prosthetic joints to make them strong enough to last for years, according to researchers in China writing in the current issue of the International Journal of Biomedical Engineering and Technology.

Whole joint replacement, such as hip and knee replacement, commonly use stainless steel, titanium alloys or ceramics to replace the damaged or diseased bone of the joint. Non-stick polymer or nylon is usually used to coat the artificial joint to simulate the cartilage. However, none of these materials are ideal as they produce debris within the body as the joint is used, which leads to inflammation, pain and other problems.

Now, Maoquan Xue of the Changzhou Institute of Light Industry Technology, has investigated the effect of adding ceramic particles and fibers to two experimental materials for coating prosthetic joints, UHMWPE (ultra-high-molecular-weight polyethylene) and PEEK (polyether ether ketone). Alone neither UHMWPE nor PEEK is suitable as a prosthetic cartilage materials because both crack and fracture with the kind of everyday stresses that a hip or knee joint would exert on them. The problem is that the long polymer chains within the material can readily propagate applied forces causing tiny fractures to grow quickly and the material to fail.

Xue has now demonstrated that by adding ceramic particles to the polymers and then blasting the composite with a short burst of gamma-radiation it is possible to break the main polymer chains without disrupting the overall structure of the artificial cartilage. There is then no way for microscopic fractures to be propagated throughout the material because there are no long stretches of polymer to carry the force from one point to the next. The resulting treated material is thus much tougher than the polymer alone and will not produce the problematic debris within a joint that might otherwise lead to inflammation and pain for the patient.

Xue adds that the treated composite materials might also be more biocompatible and so less likely to be rejected by the patient's immune system on implantation. He suggests that the particular structure of the composites would also be receptive to addition of bone-generating cells, osteocytes or stem cells, that could help a prosthetic joint be incorporated more naturally into the body.


Contact: Maoquan Xue
Inderscience Publishers

Related medicine news :

1. FDA Seeks Reduction in Radiation From Medical Scans
2. For Some Breast Cancer Patients, Shorter Radiation Works Well
3. Short-term radiation therapy successful on breast cancer
4. ASCROs Response to NY Times Articles on Radiation Therapy Incidents
5. Imaging manufacturers: Plan to reduce unnecessary radiation exposure and medical errors
6. Roseville Radiation Oncology Center (ROC) Redefines Efficiency With Elekta VMAT Radiotherapy Treatments
7. New cardiac CT technology drastically reduces patient radiation exposure
8. New Heart CT Scans Deliver Far Less Radiation: Study
9. Accelerated radiation therapy reduces toxicity in patients with advanced head and neck cancers
10. Delaying post-surgical radiation increases risk of breast cancer recurrence in older women
11. Radiation Most Effective Soon After Breast Cancer Surgery
Post Your Comments:
(Date:11/27/2015)... ... ... ProSidebar: Fashion is a set of 30 kinetic edge graphics ... editors can easily add an informative sidebar to any FCPX production. Create lists, ... self-animating drop zones, lines, bars, and text with the ease of FCPX's drag and ...
(Date:11/27/2015)... ... 2015 , ... A simply groundbreaking television series, "Voices in America", which is ... an array of issues that are presently affecting Americans. Dedicated to providing the world ... is changing the subjects consumers focus on, one episode at a time. , ...
(Date:11/27/2015)... IL (PRWEB) , ... November 27, 2015 , ... ... of the largest, most successful and prominent nonprofit healthcare organizations in the country. ... governance involvement with various organizations, and helped advance the healthcare industry as a ...
(Date:11/26/2015)... ... 2015 , ... Patients at Serenity Point Recovery, a holistic ... Thanksgiving Day to share the things that they are most grateful for today. ... channel, patients displayed what they wrote on index cards, describing the things that ...
(Date:11/26/2015)... ... November 26, 2015 , ... The Catalent Applied Drug Delivery ... to integrate dose form selection in early phase drug development. The first of ... and bringing together the UK’s emerging life sciences companies, corporate partners, and investors, ...
Breaking Medicine News(10 mins):
(Date:11/27/2015)... 26, 2015 ... the "2016 Global Tumor Marker Testing ... and Sales Segment Forecasts, Innovative Technologies, Instrumentation ... to their offering. --> ... "2016 Global Tumor Marker Testing Market: ...
(Date:11/26/2015)... Netherlands , November 26, 2015 ... A new combination approach blends immunotherapy with Bremachlorin-photodynamic ... A new combination approach blends immunotherapy with Bremachlorin-photodynamic therapy ... A new combination approach blends immunotherapy with Bremachlorin-photodynamic therapy ... Netherlands has found that immunotherapy can be ...
(Date:11/26/2015)... -- 3D bioprinting market is expected to ... report by Grand View Research Inc. Rising prevalence of chronic ... transplantation is expected to boost the market growth, as 3D ... --> 3D bioprinting market is expected to ... report by Grand View Research Inc. Rising prevalence of chronic ...
Breaking Medicine Technology: