Skip to main content
- Smaller Text | + Larger Text

Radiation Boost Makes Artificial Joints Last Longer

Printer icon
  • Synopsis: A blast of gamma radiation could toughen up plastic prosthetic joints to make them strong enough to last for years - Published: 2011-09-25. For further information pertaining to this article contact: Inderscience Publishers.

Main Document

A blast of gamma radiation could toughen up plastic prosthetic joints to make them strong enough to last for years.

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.

"Research on polymer composites of replacement prostheses" in Int. J. Biomedical Engineering and Technology, 2011, 7, 18-27.



Related:

  1. Joint Replacement Surgery Information
  2. Detecting Warning Signs of Joint Replacement Failure
  3. Stem Cells Could Prevent Need for Joint Replacements





Newsletter

     What will I receive?

Money ChartLoan Information for low income singles, families, seniors and disabled. Includes home, vehicle and personal loans.


Abraham LincolnFamous People with Disabilities - Well known people with disabilities and conditions who contributed to society.


Pink awareness ribbonList of awareness ribbon colors and their meaning. Also see our calendar of awareness dates.


Chart IconBlood Pressure Chart - What should your blood pressure be. Also see information on blood group types and compatibility.


  1. Report: Global Learning Disability Partnering 2010 to 2017
  2. 2018 Education Budget Summary and Key Points
  3. Declawing Linked to Aggression and Other Abnormal Behaviors in Cats
  4. Russia Facing Ban From PyeongChang 2018 Paralympics




Citation