摘要:
An implant for use in a medical procedure includes an anchor body and a flexible material. The anchor body includes a perimeter sidewall having an upper free edge, an outer surface, and an inner surface. The anchor body also includes a bottom wall, connecting the sidewall on one edge, which has an inner surface and an outer surface. The inner surfaces of the sidewall and bottom wall define a cavity and the upper free edge of the sidewall defines a top opening into the cavity. The flexible material is connected to the anchor body and is positioned in the cavity with at least a portion extending out of the top opening.
摘要:
A vertebral body replacement device (5000) includes a body member (5100) and a central rod member (5200) having two threaded portions and configured to be operatively associated with the body member (5100). The device also includes a first end member (5300) and a second end member (5400) with the end members configured to threadingly engage the threaded portions of the central rod member (5200). The body member (5100) and the two end members (5300,5400) are further constructed to inhibit rotational movement of the two end members when the device is positioned within a space within a spine as the two end members will engage the adjacent respective vertebral bodies following rotational actuation of the central rod member (5200) causing the end members (5300,5400) to move in an axial direction relative to the body member (5100), thereby allowing the two end members to apply a force to the two vertebral bodies. A surgical instrument and method for using the device are also disclosed.
摘要:
Disclosed are electrostimulative grafts that include at least one galvanic couple with an anode spaced from a cathode. The anode and cathode can be made from biodegradable metals. The graft can include a porous graft matrix material receptive to tissue ingrowth that occurs between the anode and cathode. The electrostimulation provided by the galvanic couple after implantation of the graft can impact the development of tissue within and/or around the porous graft matrix material. Also disclosed are methods for making electrostimulative grafts and for galvanically electrostimulating tissue growth in a porous graft matrix material.
摘要:
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.
摘要:
Improved methods and apparatuses for vertebral body distraction and fusion in accordance with various embodiments of the present invention employ one or more coaxial screw gear sleeve mechanisms. In various embodiments, coaxial screw gear sleeve mechanisms include a post with a threaded exterior surface and a corresponding sleeve configured to surround the post, the corresponding sleeve having a threaded interior surface configured to interface with the threaded exterior surface of the post and a geared exterior surface. A drive mechanism can be configured to interface with the geared exterior surface of the sleeve, causing the device to distract.
摘要:
The sacral-iliac joint between an iliac and a sacrum is fused either by the creation of a lateral insertion path laterally through the ilium, through the sacral-iliac joint, and into the sacrum, or by the creation of a postero-lateral insertion path entering from a posterior iliac spine of an ilium, angling through the sacral-iliac joint, and terminating in the sacral alae. A bone fixation implant is inserted through the insertion path and anchored in the interior region of the sacrum or sacral alae to fixate the sacral-iliac joint.
摘要:
The present invention relates to a polymer scaffold design and method for treating segmental long bone defects without amputation that permits permanent regrowth of bone in the area of the segmental defect, without external fixation or other problems inherent in current systems. The polymer scaffold is preferably made from a poly(ester urea) polymer and includes an outer shell, sized to fit over a segmental defect in a bone, and a collagen containing material. In some embodiments, the collagen containing material is placed in a polymer insert sized to fit within the segmental bone defect and within said outer shell. In some embodiments, the outer shell may contain struts running longitudinal struts along the inside surface of the outer shell. In some of these embodiments, the insert will have a corresponding set of grooves sized to receive the struts.
摘要:
Biocompatible mesh materials are employed to make implants for repairing or replacing a bone or for soft tissue repair. The mesh materials can be comprised of bioabsorbable materials, non-bioabsorbable materials or bioabsorbable and non-bioabsorbable materials. Pharmaceutical actives, bone growth enhancers and the like can be combined with the implants.
摘要:
A surgical instrument for use in implanting a stemless humeral component to replace the humeral head of a patient's humerus comprises an implant insertion tool (540) having a body (542) with an elongated bore (544) extending through it. A locking rod (548) is captured in the bore so as to rotate freely relative to the body, the locking rod having a set of locking threads (556) formed in a distal end thereof. An alignment collar (560) has a number of alignment keys (562) extending downwardly from a lower surface thereof. A distal end of the elongated bore opens into the lower surface of the alignment collar, and the locking threads extend through the distal end of the elongated bore and are positioned between the alignment keys of the alignment collar.