Devices, systems and methods for SI joint treatment
AssigneeLegacy Surgical, LLC
InventorsJosh Simpson, Lee Strnad, Dave Lamb
Life of this patent
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Abstract
Disclosed are devices, systems and methods for inserts for sacroiliac joint arthroplasty, which can include the employment of a longitudinal bone screw and associated threaded cylindrical sleeve, received on a proximal end of the bone screw, with a collet, nut or other securement feature holding the sleeve onto the screw. The sleeve can selectively articulate and/or be immobilized relative to the bone screw, with the system allowing for, at a surgeon's option, motion preservation between bone surfaces in some surgical applications while being utilized as an immobilizing and/or fusion construct between bone surfaces during other surgical applications.
Claims20
An implant for sacroiliac joint arthroplasty, comprising:
- a bone screw having a shank with a proximal end and a distal end, the shank defining a longitudinal axis from the proximal end to the distal end with an internal bore extending along the longitudinal axis from the proximal end to the distal end, the proximal end having a sleeve engagement portion comprising a proximally facing first articulating surface and a central shaft having an externally facing threaded portion;
- a cylindrical sleeve having a distally facing second articulating surface and a central bore with a proximal shoulder positioned therein, the central bore being larger than the central shaft to allow the cylindrical sleeve to tilt relative to the bone screw as the proximally facing first articulating surface articulates with the distally facing second articulating surface;
- and
- a securement component which selectively engages with the externally facing threaded portion to secure the cylindrical sleeve into engagement with the bone screw while permitting articulation between the proximally facing first articulating surface and the distally facing second articulating surface, wherein the securement component can be selectively tightened from a first position which allows relative motion between the bone screw and the sleeve to a second position which inhibits relative motion between the bone screw and the sleeve.
A method for the arthroplasty of the sacroiliac joint, comprising:
- creating an insertion path through the ilium, across the sacroiliac joint, and into the sacrum;
- inserting an implant having a longitudinal axis through the insertion path into the ilium, through the sacroiliac joint, and into the sacrum, the implant comprising:
- a generally cylindrical elongated body having a first external screw thread extending proximately from a distal end thereof, a second external thread extending proximately from a proximal end thereof, a non-threaded section extending between the first and second external screw threaded portions and a proximally facing engagement surface,
- a generally cylindrical sleeve having a third external screw thread, the generally cylindrical sleeve sized and configured to pass over the second external thread and the non-threaded section of the generally cylindrical elongated body, the generally cylindrical sleeve including a distally facing second engagement surface, the distally facing second engagement surface configured to contact the proximally facing engagement surface of the generally cylindrical elongated body when the generally cylindrical sleeve is positioned over the generally cylindrical elongated body, and
- a collet or nut having an internally threaded bore, the collet or nut being sized and configured to engage with the second external thread, whereby tightening or loosening of the collet or nut on the second external thread selectively alters a contact force between the distally facing second engagement surface and the proximally facing engagement surface,
- anchoring the first external screw thread of the generally cylindrical elongated body in an interior region of the sacrum;
- anchoring the third external screw thread of the generally cylindrical sleeve into an interior region of the ilium;
- and
- positioning at least a portion of the proximally facing engagement surface and at least a portion of the distally facing second engagement surface within the sacroiliac joint.
Dependencies are inferred from the claim text.