Abstract: A method of performing an orthopedic procedure in a sacroiliac region. At least a portion of an undercutting system is inserted at least partially into an aperture in at least one of an ilium and a sacrum. The undercutting system includes an insertion apparatus, a probe assembly and a cutting assembly. The probe assembly is moved with respect to the insertion apparatus from a retracted position to an extended position so that at least a portion of the probe assembly is between the ilium and the sacrum. The probe assembly is manipulated between the ilium and the sacrum. The cutting assembly is moved with respect to the insertion apparatus from a refracted position to an extended position so that at least a portion of the probe assembly is between the ilium and the sacrum. The cutting assembly is manipulated between the ilium and the sacrum to cut tissue between the ilium and the sacrum.

Abstract: A method of performing an orthopedic procedure in a sacroiliac region. At least a portion of an undercutting system is inserted at least partially into an aperture in at least one of an ilium and a sacrum. The undercutting system includes an insertion apparatus, a probe assembly and a cutting assembly. The probe assembly is moved with respect to the insertion apparatus from a retracted position to an extended position so that at least a portion of the probe assembly is between the ilium and the sacrum. The probe assembly is manipulated between the ilium and the sacrum. The cutting assembly is moved with respect to the insertion apparatus from a refracted position to an extended position so that at least a portion of the probe assembly is between the ilium and the sacrum. The cutting assembly is manipulated between the ilium and the sacrum to cut tissue between the ilium and the sacrum.

Abstract: An undercutting system for preparing a region between an ilium and a sacrum for sacroiliac fusion. The undercutting system includes a probe assembly and a cutting assembly. The probe assembly is operably mounted to the insertion apparatus. The probe assembly is moveable with respect to the insertion apparatus between a retracted configuration and an extended configuration. In the extended configuration at least a portion of the probe assembly extends laterally from the insertion apparatus. The cutting assembly is operably mounted with respect to the probe assembly and the insertion apparatus. The cutting assembly is movable with respect to the insertion apparatus between a retracted configuration and an extended configuration. In the extended configuration at least a portion of the cutting assembly extends laterally from the insertion apparatus.

Abstract: An undercutting system for preparing a region between an ilium and a sacrum for sacroiliac fusion. The undercutting system includes an insertion apparatus, a probe assembly and a cutting assembly. The probe assembly is operably mounted to the insertion apparatus. The probe assembly is moveable with respect to the insertion apparatus between a retracted configuration and an extended configuration. In the extended configuration at least a portion of the probe assembly extends from the insertion apparatus. The cutting assembly is operably mounted with respect to the probe assembly and the insertion apparatus. The cutting assembly is movable with respect to the insertion apparatus between a retracted configuration and an extended configuration. In the extended configuration at least a portion of the cutting assembly extends from the insertion apparatus.

Abstract: An undercutting system for preparing a region between ilium and sacrum for sacroiliac fusion. The undercutting system includes an insertion apparatus and a cutting assembly. The insertion apparatus has an elongate shaft and a rotatable handle. The cutting assembly is operably attached to the insertion apparatus. Rotation of the handle with respect to the shaft causes the cutting assembly to move with respect to the shaft between a retracted configuration and an extended configuration. When in the extended configuration, at least a portion of the cutting assembly extends laterally from the shaft.

Abstract: A method of repairing a prior sacroiliac fusion that was not effective at stabilizing a sacroiliac joint. The prior sacroiliac fusion used a first fastening device that extended between an ilium and a sacrum. At least one aperture is formed that at least partially extends through at least one of an ilium and a sacrum. An undercutting system is inserted at least partially into the aperture and is used to cut tissue between the ilium and the sacrum. A second fastening device is inserted into the first aperture to retain the ilium in a stationary position with respect to the sacrum.

Abstract: A bone screw including a main body portion having a proximal end and a distal end. An external threaded surface and an internal threaded surface are formed on the main body portion. The external threaded surface intersects the internal threaded surface proximate a lower surface of the external threaded surface and a lower surface of the internal threaded surface. A plurality of bone growth apertures is defined on the surface of the main body portion where the external threaded surface and the internal threaded surface are not located. The bone growth apertures comprise between about 10 percent and about 60 percent of the surface of the main body portion.

Abstract: An undercutting system for preparing a region between an ilium and a sacrum for sacroiliac fusion. The undercutting system includes a probe assembly and a cutting assembly. The probe assembly is operably mounted to the insertion apparatus. The probe assembly is moveable with respect to the insertion apparatus between a retracted configuration and an extended configuration. In the extended configuration at least a portion of the probe assembly extends laterally from the insertion apparatus. The cutting assembly is operably mounted with respect to the probe assembly and the insertion apparatus. The cutting assembly is movable with respect to the insertion apparatus between a retracted configuration and an extended configuration. In the extended configuration at least a portion of the cutting assembly extends laterally from the insertion apparatus.

Abstract: An undercutting system for preparing a region between ilium and sacrum for sacroiliac fusion. The undercutting system includes an insertion apparatus and a cutting assembly. The cutting assembly is operably attached to the insertion apparatus. The cutting assembly is movable with respect to the insertion apparatus between a retracted configuration and an extended configuration.

Abstract: A bone screw including a main body portion having a proximal end and a distal end. An external threaded surface and an internal threaded surface are formed on the main body portion. The external threaded surface intersects the internal threaded surface proximate a lower surface of the external threaded surface and a lower surface of the internal threaded surface. A plurality of bone growth apertures is defined on the surface of the main body portion where the external threaded surface and the internal threaded surface are not located. The bone growth apertures comprise between about 10 percent and about 60 percent of the surface of the main body portion.

Abstract: An undercutting system for preparing a region between ilium and sacrum for sacroiliac fusion. The undercutting system includes an insertion apparatus and a cutting assembly. The cutting assembly is operably attached to the insertion apparatus. The cutting assembly is movable with respect to the insertion apparatus between a retracted configuration and an extended configuration.