COUPLING DEVICE FOR COUPLING A ROD TO A BONE ANCHOR AND SYSTEM INCLUDING SUCH A COUPLING DEVICE AND AT LEAST TWO BONE ANCHORS

Abstract: a system for coupling a rod to bone includes different first and second bone anchors and a coupling device including a receiving part with a rod receiving portion for receiving a rod and a head receiving portion for interchangeably accommodating a head of either the first or second bone anchors, and a locking member positionable at least partially around the head receiving portion and movable between a first position where the held head is movable relative to the receiving part and a second position where the held head is locked relative to the receiving part. the coupling device includes a restraining surface configured to restrict pivoting of the first bone anchor relative to the receiving part, while the coupling device is configured to restrict pivoting of the second bone anchor relative to the receiving part differently than the restricted pivoting of the first bone anchor relative to the receiving part.

Inventor(s): Lutz BIEDERMANN, Timo BIEDERMANN, Bernd FISCHER, Berthold DANNECKER

CPC Classification: A61B17/7038 ({to a different extent in different directions, e.g. within one plane only})

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