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1. (WO1997006742) SPINAL IMPLANT CONNECTION ASSEMBLY
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I Claim :

1. A connection aεεembly for connecting a εpinal implant rod to a spinal implant bolt, the aεεembly comprising:
a rod connecting member having an opening for receiving a portion of the rod;
a bolt connecting member having an opening for receiving a portion of the bolt, the rod connecting member and bolt connecting member being rotatably engaged to one another;
a rod interface washer poεitioned over a portion of the rod connecting member;
a bolt interface washer poεitioned over a portion of the bolt connecting member, the rod interface waεher and bolt interface waεher being moveable in part between the rod connecting member and the bolt connecting member, the rod connecting waεher being fixed againεt rotation relative to the rod connecting member and the bolt interface waεher being fixed againεt rotation relative to the bolt interface washer; and
εtructure extendable into the opening of at leaεt one of the rod connecting member and the bolt connecting member, εo aε to urge at leaεt one of the rod and bolt toward the other, whereby the rod interface waεher and bolt interface washer will be presεed together between the rod and the bolt, preventing rotation of the rod interface waεher and rod connecting member relative to the bolt interface washer and bolt connecting member, and securing the rod to the bolt.

2. The asεembly of Claim 1, wherein the interface waεhers have interengagement structure on a εurface thereof such that, when pressed together, the interengagement
structure will facilitate the engagement of the washers to one another against rotational movement relative to one another.

3. The connection assembly of Claim 2 , wherein said interengagement structure comprises variable angle surfaces.

4. The connection assembly of Claim 1, wherein each of the rod connecting member and bolt connecting member comprises a washer seat and washer stop for permitting sliding movement of the respective interface washer over a portion of the respective aperture, said stop surface preventing removal of the interface washer from the respective connecting member.

5. The connection assembly of Claim 1, wherein the rod connecting member and bolt connecting member are rotationally engaged by corresponding male protrusion and female cavity portions.

6. The connection assembly of Claim 1, wherein said interface washers comprise an engagement groove.

7. A method for connecting a rod to a securing device in a spinal implant system for a patient, comprising the stepε of:
providing a spinal implant rod and at least one securing device such as a bolt;
providing a connection assembly comprising a rod
connecting member having an opening for receiving a portion of the rod, a bolt connecting member having an opening for receiving a portion of the bolt, the rod connecting member and bolt connecting member being rotatably engaged to one another, at least one interface washer being positioned over and between the rod connecting member and the the bolt connecting member, the at least one interface washer being moveable in part between the rod connecting member and the bolt connecting member and being fixed against rotation relative to at least one of the rod connecting member and the bolt connecting member; and structure for creating a force between the rod, the rod connecting member, the washer, the bolt, and the bolt connecting member, the at least one interface washer having structure for engaging at leaεt one of the rod and the rod connecting member, and for engaging at least one of the bolt and the bolt connecting member, so as to prevent relative rotation of the rod and the rod connecting member and the bolt and the bolt connecting member;
positioning the rod connecting member over the desired portion of the rod;
positioning the bolt connecting member over the desired portion of the bolt;
creating a force with said force creating εtructure to urge εaid at least one washer into engagement with at least one of the rod and rod connecting member, and with at least one of the bolt and bolt connecting member, preventing
rotation of the rod and rod connecting member relative to the bolt and bolt connecting member.

8. A connection assembly for connecting a spinal implant rod to a spinal implant device such as a bolt, the assembly comprising: a rod connecting member having an opening for receiving a portion of the rod;
a bolt connecting member having an opening for receiving a portion of the bolt, the rod connecting member and bolt connecting member being rotatably engaged to one another;
an interface washer positioned over and between the rod connecting member and the bolt connecting member, the
interface washer being moveable in part between the rod connecting member and the bolt connecting member, the
interface washer having structure for fixing the interface washer against rotation relative to the rod and structure for fixing the interface washer againεt rotation relative to the bolt; and
εtructure extendable into the opening of at least one of the rod connecting member and the bolt connecting member, so as to urge one of the rod and bolt toward the other, whereby the interface washer will be pressed by one of the rod and the bolt toward the other, causing said fixing structure on said interface washer to engage the rod and the bolt against rotation relative to said interface waεher, preventing
rotation of the rod and the rod connecting member relative to the bolt and the bolt connecting member, and εecuring the rod to the bolt.

9. A connection assembly for connecting a spinal implant rod to a securing device such as a spinal implant bolt, the assembly comprising:
a rod connecting member having an opening for receiving a portion of the rod;

a bolt connecting member having an opening for receiving a portion of the bolt, the rod connecting member and bolt connecting member being rotatably engaged to one another;
at least one interface washer positioned over and between the rod connecting member and the bolt connecting member;
structure for creating a force between the rod, the rod connecting member, the washer, the bolt, and the bolt
connecting member, the at least one interface washer having structure for engaging at least one of the rod and the rod connecting member, and for engaging at least one of the bolt and the bolt connecting member, so as to prevent relative rotation of the rod and the rod connecting member and the bolt and the bolt connecting member.

10. The connection assembly of Claim 9, comprising a rod interface washer having structure for engaging at leaεt one of the rod and the rod connecting member, and a bolt connecting member having structure for engaging at least one of the bolt and the bolt connecting member.

11. The connection assembly of Claim 9, wherein said force is applied by a wedge nut screwed onto a spinal implant bolt, said wedge nut contacting said interface washer.

12. A method for connecting a rod to a bolt in a spinal implant system for a patient, comprising the steps of:
providing spinal implant rod and at least one connecting bolt;
providing a connection assembly comprising a rod
connecting member having an aperture for receiving a portion of the rod, a bolt connecting member having an aperture for receiving a portion of the bolt, the rod connecting member and bolt connecting member being rotatably engaged to one another; a rod interface washer positioned over a portion of the rod connecting member; a bolt interface washer positioned over a portion of the bolt connecting member, the rod interface washer and bolt interface washer being moveable in part between the rod connecting member and the bolt connecting member, the rod connecting washer being fixed againεt rotation relative to the rod connecting member and the bolt interface washer being fixed against rotation relative to the bolt interface washer; and structure extendable into the aperture of at least one of the rod connecting member and the bolt connecting member, so as to urge one of the rod and bolt toward the other;
positioning the rod connecting member over the desired portion of the rod;
positioning the bolt connecting member over the desired portion of the bolt;
extending said extendable structure so aε to urge one of the rod and bolt toward the other, whereby the rod interface washer and bolt interface washer will be pressed together between the rod and the bolt, preventing rotation of the rod interface washer and rod connecting member relative to the bolt interface washer and bolt connecting member, and securing the rod to the bolt.