Fixing device for a rigid transverse connection device between rods of a spinal osteosynthesis system

A fixing hook for interconnecting a rod of a spinal osteosynthesis system with a rigid transverse bar, said hook comprising:

• a body;
• a curved strip portion extending from said body for receiving the rod therein;
• and
• a passage in said body for receiving the bar, said passage having a height at least equal to a thickness of the bar and extending throughout a length of said body, said passage freely opening at a first end and at a second end, said passage terminating in an aperture at said first end, said aperture having a height exceeding the thickness of the bar, said passage defining a pair of edge portions in said body so shaped as to define a pair of corresponding ramps inclined toward said curved strip portion configured for sliding engagement by the rod to facilitate putting the rod in position within said curved strip portion.

An assembly for interconnecting to a rod of a spinal osteosynthesis system, comprising;

• a rigid transverse bar;
• a screw configured to contact said bar;
• a hook with a body and a curved strip portion extending from said body, said strip portion being configured to receive the rod, said body defining a passage configured to receive said bar and a tapped hole intersecting said passage configured for engagement by said screw, said passage extending through said body and terminating in an aperture having a height exceeding a thickness of said bar;
• and
• wherein said bar tilts about the rod when said bar is received in said passage, the rod is received in said strip portion, and said screw is threaded into said tapped hole to bear against said bar, and said bar is clamped directly against the rod and said body upon further threading of said screw into said tapped hole with said screw bearing against said bar.

A spinal osteosynthesis system, comprising:

• a first spinal rod;
• a rigid transverse bar configured for clamping contact with said rod;
• a first screw configured to contact said bar;
• and
• a first hook having a first body and a first curved strip portion extending from said first body, said first strip portion being configured to receive said first rod, said first body defining a first passage and a first tapped hole intersecting said first passage configured for engagement by said first screw, said first passage extending through said first body and terminating in a first aperture having a height exceeding a thickness of said bar;
• wherein said bar tilts about said first rod when said bar is received in said first passage, said first rod is received in said first strip portion, and said first screw is threaded into said first tapped hole to bear against said bar, and said bar is clammed directly against said first rod and said first body upon further threading of said first screw into said first tapped hole with said first screw bearing against said bar.

A spinal osteosynthesis system, comprising:

• a spinal rod;
• a rigid transverse bar configured for clamping contact with said rod;
• a screw configured to contact said bar;
• and
• a hook having a body and a curved strip portion extending from said body, said strip portion being configured to receive said rod, said body defining a passage and a tapped hole intersecting said passage configured for engagement by said screw, said passage extending through said body and terminating in an aperture having a height exceeding a thickness of said bar;
• wherein said passage defines a pair of edge portions in said body so shaped as to define a pair of ramps inclined toward said curved strip portion and configured for sliding engagement by said first rod to facilitate putting said rod in position within said curved strip portion.