Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Ceramic Hip Implants Provide Alternative for Younger Patients--Rush Testing Material That May Be More Durable Than Plastic

05.11.2002


Indiana resident Luke Pascale runs two pizza restaurants and had worked out three times a week. He also enjoyed long bike rides with his wife, but last year, the pain in his hip became so severe he couldn’t stay on a bike for more than five minutes.



"I’m very active so the thought of having hip surgery was not pleasant," said the 53-year-old father of four from St. John, Ind.

Instead of receiving the traditional hip replacement surgery, which uses a metal ball bearing in a polyethylene and titanium socket to ensure strength and stability, Pascale chose to enroll in a new study using a ceramic-to-ceramic hip implant.


"Metal-to-polyethelene hip transplants have done yoeman’s work for most patients, but after about 15 years, the metal begins to wear the plastic down, creating in some patients, osteolysis in the hip, which occurs when particles break off from the implant," said Dr. Steven Gitelis, orthopedic surgeon at Rush. He is one of the few orthopedic surgeons in Chicago testing the ceramic implant as part of a research protocol that may lead to more extensive use of the ceramic hip implants. "With more people living longer, the expectation is that hip replacements should last longer, too," he added.

To address this durability and wear issue, researchers and manufacturers began testing a ceramic-to-ceramic hip implant in 1997. Results from wear testing and examinations post mortem have suggested that ceramic hips are more durable than metal on metal hip replacements and significantly more durable that metal on polyethelene.

A large-scale clinical trial was recently completed of 1,196 total hip replacements performed between 1997 and 2002. Of these, 405 hips were followed for a minimum of 24 months. The results showed no postoperative bearing fractures and no particles flaking off that might cause complications. Also, researchers performed wear studies on ceramic hip materials with a walking and motion simulator that showed ceramic hips are 4,000 times more durable than metal on polyethylene.

The ceramic implant is not approved by the Food and Drug Administration but Gitelis believes that once it is approved, patients will have more choices of materials.

"If I’m treating a patient in his 80s, I would probably still give them the metal to polyethylene implant," Gitelis said. "But, if I have younger patient who requires a total hip replacement, I would recommend the ceramic material as it gives the patient the best chance to avoid wear and adverse effects over the long term."

Some researchers also believe that the bacteria Staphylococcus epidermis adheres more strongly to polyethylene than ceramic, though Gitelis indicated that had not yet been proven scientifically. Use of the new ceramic material will not require any new technique nor will it force surgeons to use a different socket as the new ceramic bearing is designed to fit into existing socket.

Pascale had his surgery on June 11 and now reports little discomfort and is happy he chose ceramic over traditional metal to polyethelene.


Contact: Chris Martin (href=mailto:cmartin@rush.edu>v ) or
John Pontarelli (href=mailto:jpontare@rush.edu>jpontare@rush.edua)
Phone: (312) 942-7820 or 942-5579

Chris Martin | EurekAlert!
Further information:
http://www.rush.edu/servlets/Medrel/ShowContentServlet1?id=349&cid=74

More articles from Health and Medicine:

nachricht Investigators may unlock mystery of how staph cells dodge the body's immune system
22.09.2017 | Cedars-Sinai Medical Center

nachricht Monitoring the heart's mitochondria to predict cardiac arrest?
21.09.2017 | Boston Children's Hospital

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: The pyrenoid is a carbon-fixing liquid droplet

Plants and algae use the enzyme Rubisco to fix carbon dioxide, removing it from the atmosphere and converting it into biomass. Algae have figured out a way to increase the efficiency of carbon fixation. They gather most of their Rubisco into a ball-shaped microcompartment called the pyrenoid, which they flood with a high local concentration of carbon dioxide. A team of scientists at Princeton University, the Carnegie Institution for Science, Stanford University and the Max Plank Institute of Biochemistry have unravelled the mysteries of how the pyrenoid is assembled. These insights can help to engineer crops that remove more carbon dioxide from the atmosphere while producing more food.

A warming planet

Im Focus: Highly precise wiring in the Cerebral Cortex

Our brains house extremely complex neuronal circuits, whose detailed structures are still largely unknown. This is especially true for the so-called cerebral cortex of mammals, where among other things vision, thoughts or spatial orientation are being computed. Here the rules by which nerve cells are connected to each other are only partly understood. A team of scientists around Moritz Helmstaedter at the Frankfiurt Max Planck Institute for Brain Research and Helene Schmidt (Humboldt University in Berlin) have now discovered a surprisingly precise nerve cell connectivity pattern in the part of the cerebral cortex that is responsible for orienting the individual animal or human in space.

The researchers report online in Nature (Schmidt et al., 2017. Axonal synapse sorting in medial entorhinal cortex, DOI: 10.1038/nature24005) that synapses in...

Im Focus: Tiny lasers from a gallery of whispers

New technique promises tunable laser devices

Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...

Im Focus: Ultrafast snapshots of relaxing electrons in solids

Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!

When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...

Im Focus: Quantum Sensors Decipher Magnetic Ordering in a New Semiconducting Material

For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.

Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

“Lasers in Composites Symposium” in Aachen – from Science to Application

19.09.2017 | Event News

I-ESA 2018 – Call for Papers

12.09.2017 | Event News

EMBO at Basel Life, a new conference on current and emerging life science research

06.09.2017 | Event News

 
Latest News

Rainbow colors reveal cell history: Uncovering β-cell heterogeneity

22.09.2017 | Life Sciences

Penn first in world to treat patient with new radiation technology

22.09.2017 | Medical Engineering

Calculating quietness

22.09.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>