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US 7,896,925 B2Granted
Hip prosthesis and designing method thereof
AssigneeUniversita degli Studi di Roma
InventorsAdelina Teresa Maria Borruto, Luigi Marrelli
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Abstract
Hip prosthesis, comprising a first prosthetic body reproducing an acetabular cup and a second prosthetic body reproducing a femoral head and apt to work coupled to the first prosthetic body, wherein the prosthetic bodies have low debris production and different wettability (θ) (FIG. 20A).
Claims3
A manufacturing method of a hip prosthesis comprising two prosthetic bodies reproducing an acetabular cup and a femoral head, respectively,
- which method provides that said prosthetic bodies have a low debris production,
- which method comprises:
- a step of selecting a CoCr alloy for manufacturing one of said bodies and PEEK reinforced with carbon fibres for manufacturing the other of said bodies;
- a step of lapping a surface of said CoCr alloy so as to obtain an angle of wettability of about 47 degrees;
- a step of lapping a surface of said PEEK reinforced with carbon fibres so as to obtain an angle of wettability of about 64 degrees,
- so as to provide a large different surface wettability between said materials, one having an essentially hydrophilic and the other one an essentially hydrophobic behaviour or one a slightly hydrophilic and the other one a marked hydrophobic behaviour, or vice-versa,
- said prosthetic bodies having a difference between the respective angles of wettability greater than 10 degrees.
4 more elements
Dependencies are inferred from the claim text.