Abstract: A spinal fixation device for securing two stabilizing rods to bone has a threaded shaft for fastening to bone, a primary rod coupling head and a secondary rod coupling head. The first rod coupling head is connected to the threaded shaft and has a side wall and a cavity for receiving a rod, the cavity being open toward a top of the first rod coupling head. In a neutral position of the first rod coupling head, the first rod coupling head extends symmetrically around the longitudinal axis of the threaded shaft. The second rod coupling head is rotatably connected to the first rod coupling head, around an axis of rotation that is disposed at an angle that is not perpendicular to the longitudinal axis of the threaded shaft when the first rod coupling head is in the neutral position.

Abstract: A spinal fixation device for securing two stabilizing rods to bone has a threaded shaft, a first rod coupling head connected to the threaded shaft and a secondary rod coupling head. The first rod coupling head has a side wall and a cavity with an open top for receiving a rod. In a neutral position of the first rod coupling head, the first rod coupling head extends symmetrically around the longitudinal axis of the threaded shaft. The second rod coupling head is rotatably connected to the first rod coupling head, around an axis of rotation. The axis of rotation is disposed at an angle that is not perpendicular to the longitudinal axis of the threaded shaft when the first rod coupling head is in the neutral position. This allows for two rods to be manipulated independently through different axis planes at any single point of bony fixation.

Abstract: A spinal fixation device for securing two stabilizing rods to bone, such as the spine, pelvis or cranium, has a threaded shaft configured for fastening to bone, a first (primary) rod coupling head and a secondary rod coupling head. The threaded shaft has a longitudinal axis and the first rod coupling head is connected to the threaded shaft. The first rod coupling head has a side wall and a cavity for receiving a rod, the cavity being open toward a top of the first rod coupling head. In a neutral position of the first rod coupling head, the first rod coupling head extends symmetrically around the longitudinal axis of the threaded shaft. The second rod coupling head is rotatably connected to the first rod coupling head, around an axis of rotation. The axis of rotation is disposed at an angle that is not perpendicular to the longitudinal axis of the threaded shaft when the first rod coupling head is in the neutral position.