Device for applying a tensional force between vertebrae of the human vertebral column
AssigneeHowmedica, Inc.
InventorPeter Metz-Stavenhagen
Life of this patent
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Abstract
A device for applying a tensional force between two vertebrae of the human vertebral column, having at least two retaining members adapted to be brought into engagement with associated vertebrae, said members having a throughgoing opening for the accommodation of a threaded rod, and pairs of nuts adapted to be threaded onto said threaded rod in order to fix said retaining members in a desired position on said threaded rod, characterized in that said retaining members are configured as clamping members (10) having two legs (14, 16) which are bendable relative to each other in the plane extending through said threaded rod (26) to embrace a transverse process (22) of a vertebra.
Claims7
A device for applying an adjustable tensional force between two vertebrae of the human vertebral column, said device comprising:
- (a) a first retaining member and a second retaining member to be brought into engagement with a first associated vertebra and a second associated vertebra and said first retaining member having a first throughbore and said second retaining member having a second throughbore;
- (b) a threaded rod which can be accommodated simultaneously within both said firth throughbore and said second throughbore;
- (c) an elongated tube having an unthreaded inner and outer surface which is dimensioned so that said threaded rod can e slid into said tube;
- and
- (d) a nut which threads onto said threaded rod and which contacts said tube so as to support said tube on said threaded rod and so as to adjust the position of said tube on said threaded rod, thereby adjusting the distance between said first retaining member and said second retaining member and thus adjusting the tensional force between said first associated vertebra and said second associated vertebra.
Dependencies are inferred from the claim text.