A multi-member prosthesis including first and second elongated members and a central member, said multi-member prosthesis adapted to be advanced into a pilot SI joint opening in said dysfunctional SI joint via a posterior approach, the pilot SI joint opening comprising a sacrum opening and an ilium opening and a sacrum opening. The first elongated member adapted to be press-fit into the sacrum opening and the second elongated member adapted to be press-fit into the ilium opening. The central member including first and second elongated member securing means adapted to secure the first and second elongated members thereto.

Systems and methods are described for correcting sagittal imbalance in a spine including instruments for performing the controlled release of the anterior longitudinal ligament through a lateral access corridor and hyper-lordotic lateral implants.

An intervertebral implant can include a core and a flexible end plate. The core can have a core body that is elongate along a first direction and defines first and second outer surfaces. The flexible end plate can define an inner surface and an opposed bone facing surface that is configured to abut a vertebral body. The flexible end plate can be coupled to the core such that at least a portion of the inner surface faces the first outer surface and is spaced from the first outer surface. The flexible end plate is configured to resiliently flex toward a compressed configuration such that as the flexible end plate flexes toward the compressed configuration, a first end moves relative to the core along the first direction and the portion of the inner surface moves toward the first outer surface.

Systems and methods are described for correcting sagittal imbalance in a spine including instruments for performing the controlled release of the anterior longitudinal ligament through a lateral access corridor and hyper-lordotic lateral implants.

A selectively expanding spine cage has a minimized cross section in its unexpanded state that is smaller than the diameter of the neuroforamen through which it passes in the distracted spine. The cage conformably engages between the endplates of the adjacent vertebrae to effectively distract the anterior disc space, stabilize the motion segments and eliminate pathologic spine motion. Expanding selectively (anteriorly, along the vertical axis of the spine) rather than uniformly, the cage height increases and holds the vertebrae with fixation forces greater than adjacent bone and soft tissue failure forces in natural lordosis. Stability is thus achieved immediately, enabling patient function by eliminating painful motion. The cage shape intends to rest proximate to the anterior column cortices securing the desired spread and fixation, allowing for bone graft in, around, and through the implant for arthrodesis whereas for arthroplasty it fixes to endpoints but cushions the spine naturally.

A wing-shaped stemless hip joint prosthesis comprises a wing-shaped cup body which can be tightly covered on the femoral neck and the intertrochanter to fix an artificial spherical end and the femoral tissue into a whole, wherein the wing-shaped cup body integrally in an inverted cup form is inversely buckled outside the residual end of the femoral neck and is reinforced through a center lock pin and a tail pin; the wing-shaped cup body is provided with a lesser trochanter protecting wing buckled outside the lesser trochanter and a cup wing covered outside the intertrochanter line to acquire the additional supports and to be more stable accordingly; and the wing-shaped cup body is further provided with a large opening or hole so as to contain the nourishing blood vessels of the femur, accordingly decreasing the damage rate of the nourishing blood vessels and improving the postoperative recovery effect.

A solution is disclosed for deploying a fixation member into an aperture of a bone fastener. The solution may include a guide having a body that includes a proximal end and a distal end. The guide may also include a guide member coupled to the body near the proximal end. The guide member may be configured to guide placement of the fixation member to secure the bone fastener. The solution may include an engagement member coupled to the body near the distal end. The engagement member can be configured to engage the bone fastener such that the guide member is rotatable, relative to the bone fastener, about an engagement axis to the guide member at any of the plurality of relative orientations about the engagement axis.

A long-pitch, helical anchor includes splines radially extending and helically progressing circumferentially around and along the arcuate length of a curved center line (central curve). The center line may progress along the curved length of the anchor with all splines meeting near the center line. In other embodiments, the center line passes along the center of a lumen or channel from which the splines extend radially along the length. A solid point acts as a cutting edge on a distal end of the anchor. All the splines converge to the center line. Installation may be with or without a stabilizing frame, such as may be used to fill gaps and promote bone growth between joined members. The anchors may be used directly to connect and provide compression between two bones or bone structures.

An intervertebral implant is disclosed. The implant can be made of Titanium or alloys thereof. A kit of intervertebral implants can be included having different lordotic profiles or having no lordotic profile. The intervertebral implants of the kit have endplates with thicknesses suitable to prevent the titanium endplates from being too stiff. The intervertebral implants can have apertures that extend through the endplates, but sufficient surface area at the outer surfaces of the endplates to avoid subsidence into the respective vertebral body.

A system for treating dysfunctional SI joints that includes a multi-function bone structure prosthesis adapted to be delivered to and inserted into a dysfunctional SI joint via a posterior approach, the multi-function bone structure prosthesis, when disposed in a dysfunctional SI joint, being adapted to (i) stabilize the dysfunctional SI joint, (ii) induce proliferation, and/or growth and/or remodeling and/or regeneration of osseous tissue and, thereby, healing and arthrodesis of the dysfunctional SI joint, (iii) attenuate pain associated with the dysfunctional SI joint via neurostimulation, and (iv) monitor physiological and/or biomechanical parameters associated with the dysfunctional SI joint via one or more sensor systems.