Abstract:
Ein Implantat mit einem Implantatkörper (1), der einen zum Verbleib im Körper vorgesehenen Implantatabschnitt (5), einem Hautdurchtrittsabschnitt (6) und einem extrakorporalen Anschlussabschnitt (7) aufweist, und mit einem den Hautdurchtrittsabschnitt (6) umgebenden flächigen Teil (8), das zum Verwachsen mit Hautgewebe vorgesehen ist und eine Oberfläche aufweist, die eine Auflage für eine den Hautdurchtrittsabschnitt (6) umgebende Hautschicht (4) bildet erlaubt eine verbesserte Wundheilung und saubere Abdichtung der Hautdurchtrittsstelle des Implantats dadurch, dass das flächige Teil (8) sich keimdicht an den Hautdurchtrittsabschnitt (6) anschliesst, als einheitliches Teil einen sich an den Hautdurchtrittsabschnitt (6) anschließenden Innenbereich (9) und einen Aussenbereich (10) aufweist, wobei der Innenbereich (9) so steif ausgebildet ist, dass er eine in sich unbewegte Abstützfläche für eine den Hautdurchtrittsabschnitt (6) umgebende Hautschicht (4) bildet, und der Aussenbereich (10) eine der Elastizität des umgebenden Gewebes angepasste Elastizität aufweist.
Abstract:
A unitary intervertebral device, having no moving components is provided for non-fusion articulation applications. The interbody articulating device allows for limited flexion and rotation between adjacent vertebrae, helping to preserve or restore near-normal motion between adjacent vertebrae. Rotational motion is achieved through one or more protrusions incorporated into the spinal interbody device. In one articulating form, a first protrusion extends perpendicularly from the superior aspect of the disc-shaped interbody device to form a spike or rotational protrusion, while a second protrusion extends axially from the inferior aspect of the interbody device to form a second spike or rotational protrusion. Protrusions preferably extend perpendicular from the apex of both the first and second arcuate articulating surfaces. In another form, a single protrusion extends axially from the superior aspect of a circular-shape of the interbody device to form a spike or anchoring protrusion, while the inferior surface may be slightly rounded and/or comprising a bone-ingrowth promoting surface. In another form, one or both of the first and / or second arcuate surfaces may be highly polished. Numerous planar geometries are described to define various profiles of the disc replacement implant which may be utilized, including irregular Reuleaux polygons. Numerous variations of the disc replacement and methods of use are described. Similarly configured fusion salvage devices are also described.
Abstract:
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.
Abstract:
An inter-vertebral-body (IVB) spacer may include a skeletal body and a pair of interchangeable contact pads. The skeletal body may be made of a rigid material for providing structure support, and the pair of contact pads may be made of a softer material for contacting the endplates of the vertebral bodies. Advantageously, the IVB spacer may be strong enough to withstand the pressure applied between the vertebral bodies yet soft enough to protect the vertebral bodies from being eroded. Moreover, the IVB spacer may have an inter-pad angle, which may be adjusted to adapt to patients with various vertebral bone structures. The inter-pad angle of the IVB spacer may be adjusted by simply selecting and replacing one of the contact pads.
Abstract:
The present invention relates to an intervertebral disc prosthesis for the total replacement of an intervertebral disc of the cervical or lumbar spine. The prosthesis provided by the invention is intended for coupled physiological motion within the disc space. The design of the disclosed prosthesis is based on an inlay positioned within the articulation area of two adjacent sliding partners and provides the advantage of comprising a ball-and socket shaped articulation area, which enables limitation of rotation around the sagittal, frontal and longitudinal axis. The inlay is protected against luxation due to its position within a recess of one of the adjacent sliding partners. An additional protuberance going through the inlay is protecting against luxation of the adjacent sliding partners.
Abstract:
Constructs that are at least partially constructed of allograft cancellous bone are disclosed, along with cartilage particles that may be used with the constructs for repairing articular cartilage defects. A multi-piece construct (20) includes a base member (22), a cap member (30) and at least one pin (40) that secures the cap member (30) to the base member (20). The base member (22) may be constructed of mineralized cancellous bone, and is used to replace the subchondral bone removed when a surgeon cuts a bore in the area of an adjacent cartilage defect. The base member (22) includes a blind bore (23) and first and second through-going transverse bores (28, 29) in opposite sides of a wall of the base member (22). The cap member (30) includes an upper section (32) that has a thickness that is similar to that of a patient's surrounding articular cartilage layer and a stem (36) depending from the upper section (32) that is dimensioned to be received in and by the blind bore (23) of the base member (22). The stem (36) includes a transverse through-going bore (37), which may be aligned with the transverse through-going bores (28, 29) of the base member (22) to receive the pin (40) therein when the construct (20) has been assembled. The cap member (30) is at least partially formed of demineralized allograft cancellous bone, into which a mixture containing lyophilized, freeze-milled allograft cartilage particles may be infused for the repair of articular cartilage defects. The cartilage particles have a size within a range of from about 10 microns to about 210 microns.
Abstract:
A porous structure having a plurality of bonded sheets each sheet having at least one aperture that partially overlaps an aperture of at least one other sheet. A method of producing a porous structure including stacking a plurality of sheets each sheet having a multiplicity of apertures, and bonding each sheet to its adjoining sheet. An open-pore network structure having a multiplicity of sheets each having a repeatable pattern. At least a portion of each sheet is bonded to the web of an adjacent sheet. The porous area of at least one of the sheets is askew to the porous area of at least another of the sheets. An open-pore structure having a multiplicity of bonded sheets, each sheet having a repeatable pattern defining a multiplicity of perforations, and a plurality of apertures defined by the repeatable pattern, the apertures extending through the perforations of at least two adjacent plates.
Abstract:
Deformable joint implants with a generally hyperbolic paraboloid shape are disclosed, including configurations for delivery into the small joints of the body in the wrists, hands, ankle and feet, such as the first carpo-metacarpal joint, which comprises a double- saddle structure. The center of the implant may be supported, or supported and configured as a central opening. Implants with supported center regions may have a uniform or non¬ uniform thickness. A region of non-uniform, reduced thickness may be circular, oval or ring¬ like in shape, with a central support that may have an increased thickness relative to the perimeter region of the implant.
Abstract:
An inter-vertebral-body (IVB) spacer may include a skeletal body and a pair of interchangeable contact pads. The skeletal body may be made of a rigid material for providing structure support, and the pair of contact pads may be made of a softer material for contacting the endplates of the vertebral bodies. Advantageously, the IVB spacer may be strong enough to withstand the pressure applied between the vertebral bodies yet soft enough to protect the vertebral bodies from being eroded. Moreover, the IVB spacer may have an inter-pad angle, which may be adjusted to adapt to patients with various vertebral bone structures. The inter-pad angle of the IVB spacer may be adjusted by simply selecting and replacing one of the contact pads.
Abstract:
The aim of the invention is to restore the mobility of an articular end (2) of a bone (3) of a patient by means of a reconstruction implant. This implant (1), which permits reconstruction both of bone and of cartilage, comprises a grated framework (10) and a sheet (20) made of a biological tissue material, this sheet firmly covering one face (11) of the framework, while the opposite face (12) is designed to be pressed rigidly against, and firmly joined to, the end of the bone.