Polyaxial screw with improved locking

Details Polyaxial screw with improved locking Polyaxial screw with improved locking

A - Human Necessities

61

B

A61B 17/70 (2006.01)

Patent

CA 2434455

A polyaxial pedicle screw assembly incorporates a concave portion on a receiver which mates with a convex surface on a head of the screw to form a ball joint. The radius of at least a portion of the concave surface is less than a radius of the mating convex portion whereby to create an interference fit.

L'invention concerne un ensemble vis pédiculaire polyaxiale qui comprend une partie concave sur un récepteur s'accouplant à une surface convexe sur une tête de la vis de façon à former un joint à rotule. Le rayon d'au moins une partie de la surface concave est inférieur à celui de la partie d'accouplement convexe, afin de créer un ajustement serré.

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