Abstract: An interspinous spacer system includes a core configured to fit between adjacent spinous processes, a first fork movable relative to the core from a non-use position to an in-use position, and second fork. When in the in-use position, the first fork extends outwardly from a first side of the core and bounds an opening. The second fork extends outwardly from a second side of the core, opposite the first side, and bounds the opening. Third and fourth forks extend outwardly from the first and second sides of the core respectively and form a second opening. The second, third, and fourth forks are affixed relative to the core and relative to each other. The first fork is inserted between spinous processes in the non-use position to avoid damage to a superspinous ligament adjacent the spinous processes. Other aspects and related methods are also disclosed.

Abstract: An interspinous spacer system includes a core having a shape configured to fit in an interspinous space between adjacent spinous processes. A plurality of extending forks extends from the core and has shaped configured to extend along vertical sides of the spinous processes. A first fork of the plurality of forks is moveable relative to the core from a non-use position to an in-use position. The first fork is located on a first side of the core in the in-use position and has a first inner side defining an opening for receiving a first spinous process of the spinous processes. The first fork is substantially non-flexible. A second fork is located on the first side of the core and has a second inner side defining an opening for receiving the first spinous process of the spinous processes. The second fork is immovable relative to the core.