Crucial ligament replacement for a knee joint
AssigneesSulzer Brothers Limited, Protek AG
InventorChristian Mansat
Life of this patent
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Abstract
The crucial ligament replacement is formed with two cords to define the anterior crucial ligament and posterior crucial ligament. The cords interpenetrate each other within sections of relatively great flexibility and relatively large longitudinal stretchability so that mutual movement between the two cords at the crossing point is reduced to a minimum where an attrition are greatly reduced at the crossing point.
Claims8
A crucial ligament replacement for a knee joint comprising
- a first cord defining an anterior crucial ligament and formed of a plurality of concentric textile tubes with at least one section of relatively large longitudinal stretchability and relatively great flexibility;
- and
- a second cord defining a posterior crucial ligament and formed of a plurality of concentric textile tubes with at least one section of relatively large longitudinal stretchability and relatively high flexibility interpenetrating said section of said first cord.
A crucial ligament replacement as set forth in claim wherein each cord has a region of relatively low flexibility adjacent said section of high flexibility thereof.
A crucial ligament for a knee joint comprising
- a first cord defining an anterior crucial ligament;
- a second cord defining a posterior crucial ligament interpenetrating said first cord at a crossing point;
- and
- single threads wound about said cords at said crossing point to secure said cords against shifting thereat.
A crucial ligament replacement for a knee joint comprising
- a first cord of concentric tubes of braided threads defining an anterior crucial ligament;
- and
- a second cord of concentric tubes of braided threads defining a posterior crucial ligament and crossing said first cord at a crossing point to define four branches, said threads of at least one tube branching from one of said branches into the remaining three branches to secure said cords against shifting at said crossing point.
A crucial ligament replacement for a knee joint comprising
- first cord of concentric tubes defining an anterior crucial ligament;
- a second cord of concentric tubes defining a posterior crucial ligament crossing said first cord, said second cord interpenetrating said first cord at a first point and said first cord interpenetrating said second cord at a second point spaced from said first point to secure said cords against shifting.
Dependencies are inferred from the claim text.