Patent ID: 7896925

Claim:
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.