Postero-stabilised prosthesis with non-shifting femoral stud
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United States of America Patent
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Issued Date -
Jun 22, 2006
app pub date -
Apr 22, 2004
filing date -
Apr 24, 2003
priority date (Note) -
Abandoned
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Abstract
Full knee prosthesis having a tibial part, a tibial insert and a femoral part comprising two condyles between which extends a femoral stud of a cylindrical shape in order to define an opening into which passes a tibial stud projecting from the tibial insert, the tibial insert having concave upper surfaces in contact with the convex outer surfaces of the condyles, the contact being defined by a contact zone having a central point, characterised in that the curve delimiting the transverse cross-section of the femoral stud is defined so that the central point of the contact zone undergoes a rearward translation (posterior recoil) which decreases according to the angle of flexion from a flexion of about 30.degree. to become zero for an angle of flexion of 80 to 90.degree., and remains zero to a maximum flexion of 120-130.degree..
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