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Charlotte, NC
A female asked:

what is an artificial joint made from?

3 doctor answers7 doctors weighed in
Dr. Christopher Dougherty
Orthopedic Surgery 25 years experience
Artificial joints: Typically they are made from surgical steel and a special plastic but sometimes parts are also made of ceramic.
Dr. Michael Granberry
Orthopedic Surgery 37 years experience
Differing materials: Cobalt chrome alloys- very strong, and works well as a bearing surface. Titanium and its alloys- works well with contact to bone, more flexible than cocr, which is good sometimes. Ultrahigh molecular weight polyethylene- the main plastic that is used. Ceramics- can be polished smoother than cocr, and is supposed to lower wear when used against poly, or ceramic itself. Steel is not used anymore.
Dr. Bertrand Kaper
Orthopedic Reconstructive Surgery 29 years experience
Metal and Plastic: Most hip and knee replacements are made of a combination of materials that have been shown through years of research and use to be the most durable. Surgeons can choose between titanium, chrome/cobalt alloys, ceramic, zirconium and plastic (usually polyethylene).

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A 21-year-old member asked:

How does the uric acid get into the joints?

2 doctor answers7 doctors weighed in
Dr. Pam Yoder
Specializes in Maternal-Fetal Medicine
Referring : I am taking advantage of healthtap sharing to get this question to doctors who work in this area. I hope this helps.
Dr. William Walsh
Addiction Medicine 17 years experience
Uric acid is soluble in water, and simply moves freely across the joint capsule. When concentrations of uric acid are strong enough, or if you become dehydrated, the acid crystalizes. A joint aspiration with a needle and examination of that fluid is the definitive way the diagnosis of gout is made - by looking at the crystals under a microscope. Serum uric acid levels help, but don't confirm .
Jan 30, 2012
Dr. Pam Yoder
Dr. Pam Yoder commented
Specializes in Maternal-Fetal Medicine
Provided original answer
Thanks for your input, Doctor Walsh.
Feb 3, 2012
A 31-year-old member asked:

Can gout affect more than just joints?

4 doctor answers10 doctors weighed in
Dr. Gregory Hines
Family Medicine 24 years experience
Yes: It can affect other organs such as kidneys as well.
CA
A 40-year-old member asked:

Is it possible to get meningitis in your joints?

2 doctor answers3 doctors weighed in
Dr. James Ferguson
Pediatrics 46 years experience
Agent can infect Jt: A variety of infectious agents can travel in the blood and end up in both the brain and a joint however, if a germ known to cause meningitis is only found in the joint it is simply a joint infection.
A 39-year-old member asked:

How could you tell if a finger hinge joint is broken ?

3 doctor answers8 doctors weighed in
Dr. Barry Waldman
Orthopedic Surgery 29 years experience
X-ray: X-rays are very accurate for fractures.
CA
A 40-year-old member asked:

What is the main difference between osteoarthritis and degenerative joint disease?

2 doctor answers6 doctors weighed in
Dr. Joel McClurg
Specializes in Orthopedic Surgery
Nothing: Djd and oa are two descriptions for the same basic process.

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Last updated May 6, 2016

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