Stabilization system, implant, and methods for preventing relative motion between sections of tissue

An implant for a minimally invasive bone stabilization system for preventing relative motion between an ilium and a sacrum, said implant comprising:

• an elongate trunk comprising a proximal end configured to be positioned within the ilium, a distal end configured to be positioned within the sacrum such that said elongate trunk extends between the ilium and the sacrum, a bore extending through said elongate trunk, and a periphery defined by an outer surface of said elongate trunk;
• a proximal anchor extending proximally from said elongate trunk and comprising at least one deformable feature adapted to be deformed to a deployed configuration in which at least a portion of said deformable feature extends outwardly beyond said periphery of said elongate trunk to engage the ilium;
• and
• a distal anchor coupled to said elongate trunk opposite said proximal anchor and comprising an expandable member defining an interior in fluid communication with said bore of said elongate trunk such that said distal anchor is configured to be deployed by said expandable member receiving injectable material through said bore with said proximal anchor in said deployed configuration to move said distal anchor from a collapsed state in which said expandable member is within said periphery of said elongate trunk, to an expanded state in which at least a portion of said expandable member extends outwardly beyond said periphery to displace cancellous bone of the sacrum.

A method for preventing relative motion between an ilium and a sacrum with an implant including an elongate trunk having opposed proximal and distal ends defining a longitudinal axis, a periphery defined by an outer surface, and a bore extending through the elongate trunk, the implant further including a proximal anchor, and a distal anchor including an expandable member defining an interior in fluid communication with the bore, said method comprising the steps of:

• creating a minimally invasive incision within skin;
• positioning an access cannula through the minimally invasive incision;
• resecting a borehole through the ilium and into the sacrum through the access cannula;
• positioning the implant within the borehole such that the proximal anchor is disposed in the ilium and the distal anchor is disposed in the sacrum;
• operating an insertion tool removably coupled to the implant to apply a compressive force to the proximal anchor along the longitudinal axis to move the proximal anchor from an initial configuration in which the proximal anchor is within said periphery of the elongate trunk to a deployed configuration in which at least a portion of a deformable feature of the proximal anchor extends outwardly beyond the periphery of said elongate trunk relative to the longitudinal axis to engage the ilium;
• and
• injecting injectable material through the bore and into the expandable member to move the expandable member between a collapsed state in which said expandable member is within the periphery of the elongate trunk, to an expanded state in which at least a portion of said expandable member extends outwardly beyond the periphery of the elongate trunk relative to said longitudinal axis to engage the sacrum.