361results about "Wrist joints" patented technology

An osteogenic osteoimplant in the form of a flexible sheet comprising a coherent mass of bone-derived particles, the osteoimplant having a void volume not greater than about 32% and a method of making an osteogenic osteoimplant having not greater than about 32% void volume, the method comprising: providing a coherent mass of bone-derived particles; and, mechanically shaping the coherent mass of bone-derived particles to form an osteogenic osteoimplant in the form of a flexible sheet.

A permanent non-resorbable implant allows surgical replacement of cartilage in articulating joints, using a hydrogel material (such as a synthetic polyacrylonitrile polymer) reinforced by a flexible fibrous matrix. Articulating hydrogel surface(s) are chemically treated to provide a negative electrical charge that emulates the negative charge of natural cartilage, and also can be treated with halogenating, cross-linking, or other chemical agents for greater strength. For meniscal-type implants, the reinforcing matrix can extend out from the peripheral rim of the hydrogel, to allow secure anchoring to soft tissue such as a joint capsule. For bone-anchored implants, a porous anchoring layer enables tissue ingrowth, and a non-planer perforated layer can provide a supportive interface between the hard anchoring material and the softer hydrogel material.

This invention is directed to orthopedic implants and systems. The invention also relates to methods of implant design, manufacture, modeling and implantation as well as to surgical tools and kits used therewith. The implants are designed by analyzing the articular surface to be corrected and creating a device with an anatomic or near anatomic fit; or selecting a pre-designed implant having characteristics that give the implant the best fit to the existing defect.

The present invention relates to methods for determining meniscal size and shape for use in designing therapies for the treatment of various joint diseases. The invention uses an image of a joint that is processed for analysis. Analysis can include, for example, generating a thickness map, a cartilage curve, or a point cloud. This information is used to determine the extent of the cartilage defect or damage and to design an appropriate therapy, including, for example, an implant. Adjustments to the designed therapy are made to account for the materials used.

Ankle prosthesis apparatuses, systems and methods are provided as disclosed herein. Additionally, systems and methods for bone resection and implantation of prosthetics are provided, including surgical techniques and related instrumentation. An ankle prosthesis apparatus can include a talar component having a lower surface with a bone fixation portion for fixation to a talus bone and an upper surface designed for articulation with a bearing component. The bearing component can have a lower surface for articulation with the talar component and an upper surface for articulation with a tibial component. The tibial component can have a lower surface for articulation with the bearing component and an upper surface with a bone fixation portion for fixation to a tibia bone and/or a fibula bone. The bearing component can have a protrusion on its upper surface adapted for engagement with a recess on the tibial component to allow desired rotational and translational movement. Methods and systems can be used to prepare a bone surface for implantation of a prosthesis including determining a location for a curved cut line on the bone surface and drilling a series of holes tangent to the curved cut line to create a curved bone resection surface. Methods and systems can be used for the implantation of an ankle joint prosthesis including the use of an alignment guide, tibia and talus drill guides, tibia and talus saw guides, and tibia and talus broach guides, all components of which can be placed on and removed from a plurality of alignment anchor pins throughout the implantation procedure. A method for medially to laterally implanting an ankle joint prosthesis can include exposing tibia and talus bones from the medial side, resection of the tibia and talus bones, broaching the tibia and talus bones, and positioning and affixing the ankle joint prosthesis components.

A resorbable implant for interposition arthroplasty which is intended to fill a void between two adjacent bone ends, providing a cushion between the bone ends to prevent impingement of the bone ends while providing time for tissue to infiltrate into the space occupied by the implant. It has a protracted resorption time of preferably at least three months to allow time for the proliferation of load-bearing host fibrous tissue in place of the resorbed implant material. The implant preferably is porous with a pore size of greater than about 80 microns in order to enhance infiltration of fibrous tissue. The implant has a modulus in the range of 0.8 to 20 MPa which is soft enough to allow it to conform to surface irregularities of the adjacent bone surfaces while being hard enough to maintain a desired separation between those bones while tissue infiltration replaces the resorbable implant material. The implant may be preformed to the desired shape or alternatively may be formable by the surgeon by methods such as carving with a scalpel. A preferred application for the implant is as a trapezium bone replacement.

A total ankle replacement system, novel surgical method for total ankle replacement, and novel surgical tools for performing the surgical method are described. The total ankle replacement system includes the calcaneus in fixation of a lower prosthesis body, thereby significantly increasing the amount of bone available for fixation of the lower prosthesis body and allowing the lower prosthesis body to be anchored with screws. The total ankle replacement system further includes a long tibial stem which can also be anchored into the tibia with, for example, screws, nails, anchors, or some other means of attachment. The novel surgical arthroscopic method allows introduction of ankle prostheses into the ankle joint through an exposure in the tibial tubercle. Various novel surgical instruments, such as a telescoping articulating reamer and a talo-calcaneal jig, which facilitate the novel surgical method, are also described.

Disclosed are systems, devices and methods for optimizing the manufacture and/or production of patient-specific orthopedic implants. The methods include obtaining image data of a patient, selecting a blank implant to be optimized for the patient, and modifying the blank implant utilizing techniques disclosed herein to alter specific features of the implant to conform to the patient's anatomy.

The invention describes a variety of implantable artificial joint complexes adapted for implantation within a target joint space within a human body. The joint complexes comprise: an expandable joint segment adapted to fit within the target joint space; and at least one of a first cannulated anchor adapted to engage the expandable joint segment and adapted to engage a bony structure adjacent the target joint space; and a second anchor adapted to engage the expandable joint segment and adapted to engage a bony structure adjacent a target joint space. The invention also discloses methods of implanting a patient specific artificial joint complex. The methods include the steps of: accessing a target joint space by creating an access hole through an adjacent bony structure; inserting a joint complex device having a cannulated anchor and an expandable joint segment through the access hole with the expendable joint segment being positioned between the surfaces forming the joint; injecting material into the expandable joint segment; and sealing access to the target joint space.

A distal component for a wrist prosthesis that utilizes fixation within the carpus complex, incorporates features that improve the probability of intercarpal fusion and allows modularity of articulating components. In one form, the subject invention includes an ovoid fixation plate having three holes and a boss. The three holes allow attachment of stems and/or screws distally for fixation in the carpus. The boss projects proximally from the plate, and serves as an attachment point for the articulating head. Modularity of the fixation and articulating components allow a surgeon many options for optimizing fixation distally, and articulation proximally. The proximal head of the distal component is designed to articulate with existing radial components. Since the proximal head of the distal component is modular, however, the head can be redesigned to accommodate later design changes in proximal components.