18 results about "Joint spacer" patented technology

A joint spacer is provided for treatment of a joint of a human subject, the joint spacer including a pouch having a wall including a dermal graft material. The joint spacer is configured to be inserted into a space of the joint, and is shaped, when the pouch is inserted into the space and filled, to provide mechanical support to the joint. Other embodiments are also described.

The application relates to the technical field of medical devices, in particular to a hip joint spacer. The hip joint spacer comprises a spacer head, a femoral stem connected with the spacer head, Kirschner wires arranged in the spacer head and the femoral stem, an inner layer of the spacer head, an outer layer wrapped outside the inner layer, a through hole arranged on the outer layer to form a reserved channel, and the outer layer is communicated with the inner layer through the reserved channel. Compared with the prior art, the hip joint spacer has the advantages that the spacer head has an inner layer and an outer layer, the inner layer and the outer layer are made of different materials, the release time of antibiotics can be prolonged, the hip joint can maintain a high concentration of antibiotics, Kirschner wires are arranged in the spacer head and the femoral stem, the hip joint spacer has better mechanical strength than the prior art, can bear the weight of a patient, and can support the walking ability of the patient.

A method of seating a surgically implantable spacer including an upper and lower saddle member. The upper and lower saddles each having a first end and a second end. First and second expansion forces are applied to the first and second ends respectively causing equal separation until the first end encounters a resistive force, wherein a rate of separation between the first ends is reduced compared to rate of separation of the second ends. Vertebral contacting surfaces of the upper and lower saddle member can be arched, textured, or include any other feature to enhance an interface between the contacting surfaces and the vertebra.

The invention discloses an anti-infection joint spacer, and belongs to the technical field of joint spacers, the anti-infection joint spacer comprises a spacer head, a pore channel structure and a suction and discharge structure, the lower end of the spacer head is integrally connected with a thighbone far end, and an integrated structure formed by the spacer head and the thighbone far end forms the external shape of the spacer. A first frame cavity and a second frame cavity are formed in the spacer head and the distal femur respectively, the first frame cavity and the second frame cavity are connected in a penetrating mode, a special-shaped reinforcing frame and a spherical reinforcing frame are embedded in the first frame cavity and the second frame cavity respectively, and the upper end of the special-shaped reinforcing frame and the lower end of the spherical reinforcing frame are integrally and fixedly connected. According to the joint spacer, tissue fluid can be fully utilized and can make uniform contact with the head of the spacer, so that the head of the spacer is conveniently and uniformly lubricated, the using smoothness of the spacer is improved, in addition, the strength of the joint spacer can be enhanced through the reinforcing knot frame, and the problem that the joint spacer is prone to breakage due to large bearing in the using process is solved.

In some examples, a method for preparing one or more bones involves inserting a spacer into a space defined between a first bone and a second bone, such as a joint space between a first metatarsal and medial cuneiform. A bone preparation guide can be aligned with opposed ends of the first bone and the second bone using the spacer as an alignment reference. For example, the bone preparation guide may include an opening such that the guide can be installed across the joint space with the spacer received in the opening. A clinician may use the bone preparation guide to guide a tissue removing instrument to cut or otherwise prepare the ends of the first bone portion and second bone portion.

To provide a bone preparation guide.SOLUTION: In some examples, a method for preparing one or more bones involves inserting a spacer into a space defined between a first bone and a second bone, such as a joint space between a first metatarsal and medial cuneiform. A bone preparation guide can be aligned with opposed ends of the first bone and the second bone using the spacer as an alignment reference. For example, the bone preparation guide may include an opening such that the guide can be installed across the joint space with the spacer received in the opening. A clinician may use the bone preparation guide to guide a tissue removing instrument to cut or otherwise prepare the ends of the first bone portion and second bone portion.SELECTED DRAWING: Figure 1

A joint spacer for therapeutically maintains separation of bones of a joint. A frame defines a longitudinal axis extending between distal and proximal ends. A carriage is slideably retained within the frame and has at least one ramped surface and a threaded portion. An actuator screw is threadably engaged with the threaded portion, and bears against said frame to cause the carriage to slideably move within the frame when the actuator screw is rotated. A first endplate engages a bone of the joint, and has at least one ramped surface that is mateable with the ramped surface of the carriage.

The invention relates to a casting mold for producing a hip joint spacer, which comprises a head element comprising an upper shell and a lower shell, optionally a neck element, and a stem element, which comprises an upper shell and a lower shell, wherein the casting mold has a latching element, and an upper shell and a lower shell of the head element and / or of the stem element can be connected to one another by means of the latching element.

The present invention provides a device, system, and method for manufacturing a joint spacer for determining the required distance between the head region and the shaft region of a joint spacer. [Solution] A device for determining the required distance between the shaft region 3 and the head region 2 of a joint spacer 1 comprises a head and a shaft that can be positioned at different distances from each other, and the device further comprises a fixing device for fixing the distance between the head and the shaft. The device makes it possible to determine the required shape of the hip joint spacer intraoperatively by adjusting the distance from the shaft to the head relative to the patient's specific anatomical structure.

In some examples, a method for preparing one or more bones involves inserting a spacer into a space defined between a first bone and a second bone, such as a joint space between a first metatarsal and medial cuneiform. A bone preparation guide can be aligned with opposed ends of the first bone and the second bone using the spacer as an alignment reference. For example, the bone preparation guide may include an opening such that the guide can be installed across the joint space with the spacer received in the opening. A clinician may use the bone preparation guide to guide a tissue removing instrument to cut or otherwise prepare the ends of the first bone portion and second bone portion.

A device for determining the required distance between a head region and a shaft region of a joint spacer, to a system, to a method for producing a joint spacer, and to a use. A device for determining the required distance between a head region and a shaft region of a joint spacer includes a head and a shaft, which can be positioned at different distances from one another, wherein the device further includes a fixing apparatus for fixing a distance between the head and the shaft. The device allows the required shape of a hip joint spacer to be determined intraoperatively by adjusting the distance of the head from the shaft to the specific anatomy of the patient.

A joint spacer is disclosed. In one embodiment, a joint spacer comprises a foam (1), a first articular surface (3) and a second articular surface (4). The foam has a first porosity in the first location and a second porosity in the second location, the second porosity being less than the first porosity. In one embodiment, the first porosity is closer to a first outer surface (5) of the joint spacer and the second location is closer to a second outer surface (6) of the joint spacer.

Joint spacers are disclosed. In an embodiment, the joint spacers are biostable and have a first side (3) comprising a convex portion (5) and a peripheral portion (6) surrounding the convex portion. The convex portion comprises a foam (1) and the foam has a porosity in the peripheral portion that is less than the porosity at the thickest point of the convex portion.

A joint spacer has first and second endplates, with each having a bone engaging surface, and at least two cams with an inclined cam surface positioned on an opposite side. First and second slides, each having ramps with an inclined surface are engaged with the cams of the endplate. The first slide has an angled portion at an end, and the second slide has a hinge portion. A threaded shaft has a hinge portion connected to the slide hinge portion, connecting the shaft to the slide, enabling the shaft to pivot. A nut is threaded to the shaft, and can contact and interfere with the angled portion of the first slide to drive the first slide with respect to the second slide. This results in engagement of the cams and ramps to drive the endplates apart to increase the spacer height.

The present invention relates to an apparatus, a system, a method for manufacturing a joint spacer and use for determining a desired distance between a head region and a shaft region of a joint spacer. A device (10) for determining a desired distance between a head region (2) and a shaft region (3) of a joint spacer (1) comprises a head (11) and a shaft (13) which can be positioned at different distances relative to one another, where the device (10) further comprises a fixing device (15) for fixing the distance between the head (11) and the shaft (13). The device allows for intraoperatively determining the desired shape of the hip spacer by adjusting the distance of the head from the shaft for a particular anatomy of the patient.

A joint spacer has first and second endplates, with each having a bone engaging surface, and at least two cams with an inclined cam surface positioned on an opposite side. First and second slides, each having ramps with an inclined surface are engaged with the cams of the endplate. The first slide has an angled portion at an end, and the second slide has a hinge portion. A threaded shaft has a hinge portion connected to the slide hinge portion, connecting the shaft to the slide, enabling the shaft to pivot. A nut is threaded to the shaft, and can contact and interfere with the angled portion of the first slide to drive the first slide with respect to the second slide. This results in engagement of the cams and ramps to drive the endplates apart to increase the spacer height.

A balloon implantation kit includes an inflatable biodegradable balloon configured to be implanted in a human body and a hydrogel composition. In some cases, the hydrogel composition is provided in a container configured to be introduced into the biodegradable balloon. For some applications, the biodegradable balloon includes a joint spacer for treatment of a joint of a human subject, such as a subacromial spacer, a glenohumeral spacer, or a spacer for another joint, such as a knee, hip, ankle, or hand (e.g., CMC1) joint. In these applications, the biodegradable balloon is configured to be inserted into a space of a joint of the human body, and is shaped to provide mechanical support to the joint until the biodegradable balloon resorbs into the human body. For other applications, the biodegradable balloon includes a soft tissue spacer.

A joint spacer is disclosed. In one embodiment, the joint spacer is biostable and has a first side (3) comprising a raised portion (5) and a peripheral portion (6) surrounding the raised portion. The raised portion comprises a foam (1) and the foam has a porosity at the peripheral portion that is less than the porosity at the thickest point of the raised portion.