Spinal fixation system

A bone fixation system comprising:

• a bone mounting device having a first multi-faceted connecting surface configured to be mounted on a bone in a patient, wherein said bone mounting member, when mounted on a bone, extends in a first direction;
• a support rod;
• and
• an attachment assembly interconnecting said bone mounting device and said support rod, said attachment assembly having a locked and an unlocked configuration and said attachment assembly including a member extending along a first axis wherein said member defines a first mounting position for said bone mounting device and a second mounting position for said support rod comprising an opening having a narrow section configured so that when said attachment assembly is in said locked configuration, said support rod is urged into said narrow section and rotation of said support rod in said opening is prevented and wherein said attachment assembly also includes a second multi-faceted connecting surface positioned adjacent said first mounting location so that said first and said second connecting surfaces interlock when said attachment assembly is in said locked configuration to securely retain said bone mounting device in one of a range of first rotational positions about said first axis and in one of a range of first translational positions relative to said member in said first direction.

A method of correcting the position of a vertebral body in a patient's body comprising the steps of:

• positioning a first bone mounting device having a first multi-faceted connecting surface on a first vertebral body so that said bone mounting device extends in a first direction;
• and
• attaching said first bone mounting device to a mounting location on a member defining a first axis of a first attachment assembly having a second mult-faceted connecting surface;
• orienting said first bone mounting device in one of a range of first rotational positions about said first axis;
• orientating said first bone mounting device in one of a range of first translational positions relative to said member in said first direction;
• and
• securing said first attachment assembly to said first bone mounting device so that said first and said second multi-faceted surfaces interlock so as to retain said first bone mounting device in said one of said range of first rotational positions and in said one of said range of first translational positions.

A bone fixation system comprising:

• a plurality of bone mounting devices configured to be mounted on a plurality of bones in a patient, each of said bone mounting devices having a first multi-faceted connecting surface adjacent a mounting point wherein each said bone mounting device, when mounted in said bone, extends in a first direction;
• a plurality of support rods;
• a bridge member for interconnecting two of said plurality of support rods, said bridge member having said first multi-faceted connecting surface adjacent two different mounting points on said bridge member wherein said bridge member extends in a second direction when interconnecting two of said plurality of support rods;
• and
• a plurality of attachment assemblies for securely interconnecting said bone mounting devices and said bridge member with at least one of said support rods, each of said attachment assemblies, having a locked configuration, and each of said attachment assemblies including a member extending along a first axis wherein said member defines a first mounting location for said support rods and a second mounting location for said bone mounting device or said bridge member wherein said bone mounting device or said bridge member is attached by said mounting points to said attachment assembly, and wherein said attachment assembly includes a second multi-faceted connecting surface positioned on said member so that said first and said second connecting surface interlocks when said attachment assembly is in said locked configuration to securely retain each said bone mounting device or said bridge member in one of a range of rotational positions about said first axis and at one of a range of translational positions relative to said member in either said first or said second directions respectively.

A bone fixation system comprising:

• a bone mounting device configured to be mounted on a bone in a patient, said bone mounting device having a mounting point;
• a support rod;
• and
• a securing device for interconnecting said support rod and said bone mounting device wherein said securing device comprises:
• a housing having two openings, defining a first mounting location for said support rod, which are configured to receive said support rod therethrough;
• a cam core member having an eyebolt opening and a shaft, positioned in said housing so that when said support rod extends through said two openings in said housing, said support rod extends through said eyebolt opening and said shaft extends out of said housing and provides a second mounting location for said bone mounting device;
• and
• a locking cap having a locked and unlocked configuration positioned on said shaft wherein said second mounting location is interposed between said housing and said locking cap and wherein said locking cap, when in said locked configuration, is urged toward said housing so that said bone mounting device is clamped between said housing and said locking cap.

A spinal fixation system comprising:

• a bone mounting device configured to be mounted on a vertebral body in a patient, said bone mounting having a first multi-faceted connecting surface adjacent a mounting point;
• a support rod;
• a housing having two openings configured to receive said support rod therethrough said housing and a second multi-faceted surface;
• a cam core member having an eyebolt opening and a shaft, said cam core member positioned in said housing so that when said support rod extends through said two openings in said housing and through said eyebolt opening, said shaft extends out of said housing and provides a first mounting location for said bone mounting device and wherein said shaft further includes a beveled notch;
• and
• a locking cap positioned on said shaft, wherein said first mounting location is interposed between said surface of said housing having said second multi-faceted surface and said locking cap, said locking cap including a set screw and an opening for said set screw so that when said set screw is tightened in said opening, said set screw makes contact with said beveled notch and urges said cam core member in a direction such that said bone mounting member is clamped between said locking cap and said housing with said first and second multi-faceted surfaces interlocking.