HIP JOINT ENDOPROSTHESIS Russian patent published in 2007 - IPC A61F2/32 

FIELD: medicine; traumatic surgery; orthopedics.

SUBSTANCE: end prosthesis has hollow, head, neck, leg, washer consisting of movable members disposed in room between surface of head and bottom of hollow, sustained in room as head is sustained in hollow by means of flange fixed at edge of hollow. Members of washer are made in form of rings with flat contacting surfaces, being parallel to edge of hollow, are put one onto another. External surfaces of rings are congruent to internal surface of hollow, internal surfaces are congruent to surface of head. Member disposed between poles of head and of hollow is made in form of concave-convex menisci with spherical surfaces disposed concentrically. Top convex surface is congruent to internal surface of hollow and lower one, being concave in center, namely, head; flat edges of surface are conjugated with plane of adjacent ring-shaped washer. All members are placed to have gaps being capable of rocking movements between surfaces of head and hollow, one relatively other, as well as rotational movements around their own axes. Material of menisci and rings is different than material used for head and hollow.

EFFECT: improved efficiency of cure; optimization of tribologic and bio-mechanical characteristics of device; prolonged service life.

1 dwg