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|English to English translations [PRO]|
Medical - Medical (general)
|English term or phrase: bipolar hip prosthesis|
|Why is this prosthesis called "bipolar" |
What does "bipolar" mean or what is the difference between a "bipolar" and "total" hip prosthesis?
XXX bipolar hip prosthesis component is intraoperatively assembled to any appropriately sized XXX or YYY femoral stem of compatible head size. The bipolar component is comprised of an outer shell into which a bearing insert has been permanently assembled. The bearing insert has a factory assembled retaining ring.
|English translation:It consists of two parts (poles)|
The way I read it, total hip prostheses are a large group of hip joint replacements. A bipolar hip prosthesis is but one construction peculiar in its acetabular (hip bone) cup ["Acetabular components can be categorized as cemented, cementless, or bipolar" - Campbell's Operative Orthopaedics, 10th ed.,]. The cup consists of two parts:
- Internal polyethylene bearing - internal part that matches femoral head prosthesis
- External shell that is fastened to the acetabulum
The advantage of this construction, as suggested by Campbell's orthopedics, is that "...erosion and protrusion of the acetabulum would be reduced because motion is present between the metal head and the polyethylene socket (inner bearing), as well as between the metallic head and the acetabulum (outer bearing)". The construction also makes it possible to shift the load on the artificial joint from the center of the metal shell to its periphery by movements of the inner polyethylene bearing, which, for the reasons yet obscure to me, imporves biomechanics of the joint.
Hope I covered all the topics you asked about.
Selected response from:
|Thanks a lot!!!|
Gayle: Thanks for this link
Bartek: This time I wanted somebody to explain me what the difference between bipolar hip prosthesis and total hip arthroplasty is and why a “bipolar” component is called “bipolar” (see my question).
4 KudoZ points were awarded for this answer
1 hr confidence: peer agreement (net): +4
bipolar hip prosthesis vs total hip arthroplasty
Here are some links that might help you make the difference between them. Especially the second one, it compares the two. I'm no expert, but I hope to help you with some leads.
Note added at 2 hrs 44 mins (2004-03-12 08:19:50 GMT)
I just saw that the second link I gave you does not work from here. Try it this way, put in the research on Google:
\"bipolar hip prosthesis total hip prosthesis\"
There you will find the list of hits. The link for ncbi.nlm.nih.gov is fourth on the list.
www.ortho-u.net/o14/49.htm - 8k