Interspinous devices and methods of use
Devices and methods for spacing the spinous processes of adjacent vertebral members. In one embodiment, the device includes first and second sections and an intermediate section that together form an interior section. An elastic member may be positioned within the interior section. The elastic member may have a variety of orientations, sizes, shapes, densities, modulus of elasticity, and other material properties depending upon the desired displacement between the first and second sections. The intermediate section in combination with the elastic member may be deformed during this movement and thereby exert a force to stabilize the vertebral members.
1. An interspinous device for positioning between first and second vertebral members, the device comprising:
an upper section sized to contact the first vertebral member;
a lower section sized to contact the second vertebral member;
a first intermediate section extending between anterior sections of the upper and lower sections;
a second intermediate section extending between posterior sections of the upper and lower sections, the second intermediate section being independent of and spaced away from the first intermediate member;
an interior section formed between the first and second intermediate sections;
an elastic member positioned within the interior section;
the first and second intermediate sections and the elastic member providing resistance to movement of the vertebral members;
at least one of the first and second intermediate sections includes multiple turns with at least three of the turns being vertically overlapping;
at least one of the first and second intermediate sections includes a different shape than the elastic member.
2. The device of claim 1 , wherein the interior section has open lateral sides.