292 results about "Orthopaedic implant" patented technology

Disclosed herein are spinal implants particularly useful in interbody fusion surgery. One embodiment pertains to a plate configured to establish desired lordosis and/or disc height that may be implanted and secured to a superior and inferior vertebral body. The plate may be interlocked with a spacer component to form a single implant. Also disclosed is an anti-backout mechanism that helps prevent fixators from backing out upon securement of the plate in the spine. Kits comprising different sizes and inclination angles of components are disclosed, which can assist the surgeon in preoperatively assembling an implant to best fit in the surgical site of the patient.

The present invention relates to an orthopaedic implant, such as a bone plate, for the fixation of bone where the implant also has at least one microchip and at least one sensor connected to the microchip. The sensor or sensors are configured to receive physical stimulus from a portion of the implant or the patient's tissue such as temperature, pressure, and strain. The information received from the sensor or sensors is gathered by the microchip and transmitted to a receiver, such as a personal computer, outside the patient. This information enables doctors to diagnose the useful life of the implant, the load sharing of the bone plate, and possible complications typically associated with orthopaedic implants such as infection, fracture non-union, and fatigue. The implant may also have one or more electrodes located on its surface which emit an electric current to stimulate healing of the broken or fractured bone.

The present invention relates to orthopaedic implants having a fenestrated hollow shell and a biologic core. These design features provide an improved interface between the implant and the surrounding tissue, aiding fixation, and provide a vehicle for applying new bone healing and enhancing modalities, such as gene therapy, tissue engineering, and growth factors.

A method for making an orthopaedic implant, the method comprising: characterizing at least a portion of a bone corresponding to the bone to be replaced, said corresponding bone being on the contralateral side of the patient; providing a model of the orthopaedic implant based on a mirror image of the contralateral bone; and forming the orthopaedic implant based on the model.

A knee implant system includes a femoral adapter. The femoral adapter has a threaded bore so that a stem extension can be threaded onto the proximal end of the adapter. The same stem extension can be threaded onto the distal end of the tibial tray so that the number of stem extensions required in the system is reduced. The femoral adapter has a tapered exterior surface so that a metaphyseal sleeve can be frictionally connected to the femoral adapter. The metaphyseal sleeve has a threaded bore so that the same type of stem extension can be threaded onto the metaphyseal sleeve. The system can include a group of adapters to give the surgeon the option of selecting the appropriate valgus angle and anterior-posterior position of the stem extension.

Systems, devices and methods are disclosed for treating fractures. The systems, devices and methods may include one or both of an implant, such as an intramedullary nail, and a fastening assembly, such as a lag screw and compression screw assembly. The implant in some embodiments has a proximal section with a transverse aperture and a cross-section that may be shaped to more accurately conform to the anatomical shape of cortical bone and to provide additional strength and robustness in its lateral portions, preferably without requiring significant additional material. The fastening assembly may be received to slide, in a controlled way, in the transverse aperture of the implant. In some embodiments, the engaging member and the compression device are configured so that the compression device interacts with a portion of the implant and a portion of the engaging member to enable controlled movement between the first and second bone fragments. This configuration is useful for, among other things, compressing a fracture.

An orthopaedic implant system includes an orthopaedic implant implantable at a selected location within a corporeal body and configured for delivering at least one therapeutic agent to the corporeal body, the implant defining a reservoir and a plurality of channels, the reservoir configured for receiving the at least one therapeutic agent, the plurality of channels configured for conveying the at least one therapeutic agent from the reservoir to a treatment site relative to the corporeal body, the implant being at least one of an internal fixation device and a porous device.

The present invention provides a polyurethane or polyurethane/urea composition which has a tensile strength greater than 10 MPa, a modulus of elasticity greater than 400 MPa and an elongation at break greater than 30% at a temperature of between 0° C. and 60° C. and at a relative humidity of between 0% and 100%.

The invention further provides uses of the compositions of the invention in biomedical vascular stents, an orthopaedic implant, a drug delivery coating or in tissue engineering.

An orthopedic implant comprising: (a) a distal femoral component comprising a first condyle bearing surface having a first profile comprising at least three consecutive arcs of curvature; and (b) a proximal tibial component comprising a first condyle bearing surface having a second profile comprising at least three parallel arcs of curvature. The disclosure also includes a method of designing and fabricating an orthopedic implant, the method comprising: (a) evaluating images of distal femurs of a particular ethnicity to extract common shape features exhibited across an ethnicity that are unique to the ethnicity to create an ethnic specific template; (b) designing a distal femoral component comprising a first condyle surface using the ethnic specific template; and, (c) fabricating a distal femoral component embodying the first condyle surface.

An orthopaedic implant system includes an orthopaedic implant implantable at a selected location within a corporeal body and configured for delivering at least one therapeutic agent to the corporeal body. The implant includes a reservoir and a plurality of channels. The reservoir is configured for receiving the at least one therapeutic agent. The plurality of channels are configured for conveying the at least one therapeutic agent from the reservoir to a treatment site relative to the corporeal body.

An osteotome suitable for cutting through cancellous bone that is holding an orthopaedic implant requiring revision within a cavity of a bone, includes a cylindrical waveguide connectable to a source of ultrasonic vibrations at its proximal end and a blade having a hollow part-cylindrical cross-section and a cutting edge at its distal tip. The respective longitudinal axes of the waveguide and the blade cross at an angle of about 30°, and the waveguide and blade taper and curve smoothly together where they meet. The osteotome is dimensioned such that a first antinode of the ultrasonic vibrations is located at a proximal end of the waveguide, a second antinode is located at the distal tip of the blade and a node is located where the waveguide and blade meet. The osteotome cuts readily through cancellous bone when ultrasonically energized.

A surgical instrument has an elongate guide member and a reciprocable member. The elongate guide member provides a protected path of travel for an implant from outside the body to a position near a damaged tissue site. The reciprocable member is movable along the elongate guide member to push the implant along its path of travel. The reciprocable member can include an implant carrier. The implant can be an orthopaedic implant for repair or regeneration of soft tissue at a damaged joint site. The implant can be larger than the transverse dimension of the elongate guide member and folded or rolled to fit within the elongate guide member. Use of this instrument protects the implant from damage as it is delivered to the damaged joint site. The invention also includes a surgical method for delivering an implant to a damaged tissue site.

A trial implant kit includes a plurality of intermediate components and a plurality of inner components. Each of the plurality of intermediate components has a uniform inner surface, although at least two of the plurality of intermediate components having distinct outer surfaces. Each of the distinct outer surfaces is configured to engage one of a plurality of acetabular shell component geometries. Each of the plurality of inner components has a uniform outer surface portion and a bearing surface, the uniform outer surface portion configured to be received by the uniform inner surface of any of plurality of intermediate components. The bearing surface is configured to engage a femoral head. At least two of plurality of inner components having distinct bearing surface configurations.

A system for targeting landmarks on devices such as surgical implants is disclosed. The system can include a field generator for generating one or more magnetic fields, an orthopaedic implant located within the magnetic fields, the implant having at least one landmark, a removable probe with a first magnetic sensor, a landmark identifier and a processor. The landmark identifier can contain a second sensor, or, alternatively, the field generator. The processor can utilize sensor data and, if desirable, field generator and other information, to generate and display the position and orientation of the sensor(s) in preferably six degrees of freedom, and thereby, to generate and display the position and orientation of the landmark(s). The system allows for blind targeting of one or more landmarks. The landmark identifier, field generator and/or drill motor may be disposed in an autoclavable housing.

An orthopaedic implant fixation using a surgically created bone cavity as a mold for forming an anchor from an in-situ hardenable material. An in-situ formed anchor of the present invention is especially useful for attaching an implant to osteoporotic cancellous bone. The injectable nature of the in-situ formed anchor allows implants to be adapted to minimally invasive surgical techniques. The present invention can be adapted to numerous implants or implant system components to include fasteners, pins, nails, intramedullary nails, and suture anchors. Applications include bone fracture fixation, bone fracture prevention, and soft-tissue repair.

Artificial implants having reduced area to provide reduced wear are provided. The reduced area is particularly located at areas where greatest wear is exhibited. In a particular embodiment of a mobile bearing knee implant, the area is reduced on the mobile bearing insert underside, where it contacts a tibial component. The reduced area may be any shape of indentations, for example, grooves, dimples, straight patterns, curved patterns, crossing patterns, holes, channels or slots. The indentations may be various sizes, and have been found to be particularly effective if covering about 10% to about 20% of the insert at depths between about 1-2 mm.

An orthopaedic implant provides a simple yet effective retention system requiring no additional components beyond the implant and the associated fastener(s). A plurality of anti-rotation protrusions on the fastener or screw head that match recesses in the implant. The protrusions engage the recesses to prevent the fastener from reversing direction, thereby assuring that the associated fastener does not backout during normal motion of the spine and other anatomical structures. A land on the fastener screw thread assures the fastener will not disengage from the implant should it strip out of the bone. Preventing the fastener from backing out assures it will not detach from the implant or staple, assuring that the implant will remain in place until all fasteners in the system have catastrophically failed. The anti-backout features of the invention provide feedback as they engage, allowing the surgeon to move quickly when placing a fastener without the concern for inadvertent over-tightening. Although ideally suited to a spinal correction system such as a cervical plate, the invention is applicable to other orthopedic devices, including plates and staples for other applications.

A method for producing an orthopedic implant having enhanced fatigue strength. A forged implant substrate having an elongated stem is incorporated with a melting point lowering substance. Then, metal particles are sintered to the substrate, forming a porous layer on the substrate which enhances bone ingrowth or the mechanical interlock with bone cement. Advantageously, the sintering occurs at a lower temperature than if the substance were not incorporated into the substrate, which in turn results in an enhanced fatigue strength of the inventive implant. The fatigue strength of a forged or cast implant can also be improved by nitrogen diffusion hardening and/or thermally processing the implant after the porous coating is adhered by sintering. Further, the fatigue strength can be further improved by combining incorporating the melting point lowering substance with nitrogen diffusion hardening and/or aging treatment subsequent to sintering.