Navigation Links
Radiation boost for artificial joints
Date:9/22/2011

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
xuemaoq@yahoo.com.cn
86-519-863-35162
Inderscience Publishers
Source:Eurekalert

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:
*Name:
*Comment:
*Email:
(Date:8/16/2017)... ... August 16, 2017 , ... Maury Regional Health has announced a large-scale ... broadly deploying AccuVein devices, Maury Regional Medical Center is making vein visualization part of ... a needle stick and more importantly, helps our staff members locate a vein that ...
(Date:8/16/2017)... ... August 16, 2017 , ... With a new PD diagnosis every nine minutes, ... , The grants are awarded through a competitive application process and reviewed by APDA’s ... backgrounds and expertise in all areas relevant to PD research. The SAB meets ...
(Date:8/16/2017)... , ... August 16, 2017 , ... ... $5.99, eBook, 9781498499620    ) shares that during the time of a cancer diagnosis, surgery ... of God's love, and all the many ways God shows love to those ...
(Date:8/16/2017)... Lake Orion, Rochester, Michigan (PRWEB) , ... August ... ... now offer treatment options to patients suffering from chronic pelvic pain. In ... treatment of various pelvic pain disorders including endometriosis, menorrhagia (abnormal heavy bleeding during ...
(Date:8/16/2017)... ... August 16, 2017 , ... With low back pain afflicting 8 of 10 Americans at ... kissing cousin – upper back pain. But this equally vexing condition stems from a variety ... Kaixuan Liu, MD, PhD , founder and president of Atlantic Spine Center. , ...
Breaking Medicine News(10 mins):
(Date:8/15/2017)... Diplomat Pharmacy, Inc. (NYSE: DPLO), is now ... residents. Naloxone is available without a ... pharmacy, G-3320 Beecher Road. ... Administration, is intended to block or reverse the effects ... of consciousness. The medication is often carried by first ...
(Date:8/11/2017)... Israel , Aug. 11, 2017 DarioHealth ... with mobile health and big data solutions, today announced ... on Monday, August 14 and host a conference call ... quarter 2017 operating and financial results and its strategy ... will be hosted by Erez Raphael , Chief ...
(Date:8/7/2017)... WARSAW, Ind. , Aug. 7, 2017 Zimmer ... in musculoskeletal healthcare, today announced that its Board of Directors ... stockholders for the third quarter of 2017. ... will be paid on or about October 27, 2017 to ... September 22, 2017.  Future declarations of dividends are subject to ...
Breaking Medicine Technology: