Artificial spinous process for the sacrum and methods of use

A device to provide an inferior support for an interspinous implant between an L5 and S1 vertebra, the device comprising:

• an intermediate member including:
• a superior section;
• a first lateral sidewall extending from a first lateral edge of the superior section;
• a second lateral sidewall extending from a second lateral edge of the superior section;
• the superior section and the first and second lateral sidewalls forming a recess with closed posterior and lateral sides and open anterior and inferior sides and sized to extend over a spinous process of the S1 vertebra when the device is mounted to the S1 vertebra;
• the superior section including a narrower width than the open anterior side;
• first and second extensions that extend outward from the first and second lateral sidewalls and are sized to extend along a posterior face of the S1 vertebrae, the first extension configured to be positioned on a first lateral side of the S1 spinous process and the second extension configured to be positioned on a second lateral side of the S1 spinous process when the device is mounted to the S1 vertebrae;
• and
• the superior section having a bearing face positioned to be superior to the S1 spinous process and extend outward in a posterior direction beyond the S1 spinous process when the device is mounted to the S1 vertebrae to support the interspinous implant, and the bearing face further having a lip that extends outward from an anterior edge, the lip having a different width than the bearing face.

A device to provide an inferior support for an interspinous implant between an L5 vertebrae and a spinous process of a sacrum, the device comprising:

• first and second anchors;
• first and second lateral extensions coupled to the anchors to secure the device to the sacrum;
• and
• a mount disposed between and connected to the extensions, the mount having a recess that faces in an anterior direction to receive the spinous process when the first and second lateral extensions are connected to the sacrum, the mount including a superior bearing face to support the interspinous implant and an intermediate section that extends over the recess and forms a posterior face, the mount also including a lip cut out from an anterior end of the bearing face and extending outward from the bearing face to be positioned over a superior edge of the sacrum when the device is mounted to the sacrum.