Abstract:
An intervertebral prosthetic joint including a first articular component adapted to engage a first vertebra and a second articular component adapted to engage a second vertebra. The articular components include abutting convex and concave articular surfaces that cooperate to permit articulating motion between the articular components. At least one of the convex and concave articular surfaces includes at least one surface depression that is configured to facilitate removal of matter disposed between abutting portions of the articular surfaces. In one embodiment of the prosthetic joint, each of the articular components has a vertebral bearing surface and a flange extending therefrom that is configured to penetrate a corresponding one of the first and second vertebrae, with the flange defining at least one opening extending therethrough to permit bone throughgrowth.
Abstract:
A spinal implant is described in this disclosure. The implant includes first and second pieces separated by a controlled break location. Spinal implant kits having multiple spinal implant pieces derived from a common source also are disclosed.
Abstract:
An implant (10) has one or more surfaces (10a, 10b) with a basic or starting surface structure (1a) derived from mechanical working. A topographic modification of the surface structures is arranged on said surface structure or surface structures. The topographic modification can be formed, for example, by means of shot-peening, etching, plasma spraying, chemical action, etc. The topographically modified surface structures support bone-growth-stimulating agent. In a method for producing the implant, three subsidiary methods are used for carrying out the mechanical working, the topographical modification, and the application of the bone-growth-stimulating agent. An important niche in the demand which exists in the field of implants is thus covered in an advantageous manner.
Abstract:
Separate and successive treatment in carried on a portion of the implant using three acids: fluohydric, sulfuric and hydrochloric acids. An evenly distributed roughness with a broad relief is thus obtained. Said surface is then contacted with a plasma rich in growth factors.
Abstract:
This invention provides a novel orthopedic prosthesis (5), specifically a prosthetic tibial component (10) for a prosthetic total knee joint, that comprises two constructs, one being a metal base construct (30) that engages the bone and the other being a polyethylene bearing construct (35) that attaches to the metal base construct (30) and articulates with a femoral prosthetic component (20) on the opposing side of the joint. The metal base construct (30) is composed of two different metals, one of which engages the bone surface and the other of which engages the polyethylene bearing construct (35). Each of these metals is selected so that its characteristics are well suited to its particular function. More particularly, the first metal (i.e., the one that engages the bone surface) is selected so as to provide a superior bone-engaging face, while the second metal (i.e. the one that engages the polyethylene bearing construct) is selected so as to provide a superior polyethylene-engaging face.
Abstract:
Apparatus for a partial or complete discectomy of an intervertebral spinal disc accessed by one or more trans-sacral axial spinal instrumentation/fusion (TASIF) axial bore (22, 152) formed through vertebral bodies in general alignment with a visualized, trans-sacral anterior or posterior axial instrumentation/fusion line (AAIFL or PAIFL) line. A discectomy instrument (130) is introduced through the axial bore, the axial disc opening, and into the nucleus to locate the instrument cutting head (134) within the nucleus of the disc. The cutting head is operated by operating means (140) coupled to the instrument body proximal end for extending the cutting head laterally away from the disc opening. A discectomy sheath (180) is first introduced to extend from the skin incision through the axial bore and into the axial disc opening, the sheath having a lumen for introducing discectomy instruments therethrough and for irrigation and aspiration of the disc cavity.
Abstract:
Surgical apparatus for forming one or more curved axial bore commencing from an anterior or posterior sacral target point and cephalad through vertebral bodies in general alignment with a visualized, trans-sacral axial instrumentation/fusion (TASIF) line in a minimally invasive, low trauma, manner. An anterior axial instrumentation/fusion line (AAIFL) or a posterior axial instrumentation/fusion line (PAIFL) that extends from the anterior or posterior target point, respectively in the cephalad direction following the spinal curvature through one or more vertebral body is visualized by radiographic or fluoroscopic equipment. Generally curved anterior or posterior TASIF axial bores are formed in axial or parallel or diverging alignment with the visualized AAIFL or PAIFL, respectively. The anterior and posterior TASIF axial bore forming tools can be manipulated from proximal portions thereof to adjust the curvature of the anterior or posterior TASIF axial bores as they are formed in the cephalad direction. The boring angle of the distally disposed boring member or drill bit can be adjusted such that selected sections of the generally curved anterior or posterior TASIF axial bores can be made straight or relatively straight, and other sections thereof can be made curved to optimally traverse vertebral bodies and intervertebral spinal discs, if present.
Abstract:
The invention relates to a cup-shaped member for a hip joint prosthesis, for implantation into a cavity in the bone tissue in the acetabulum, comprising an acetabular cup (1) made of metal, a ceramic material or any other suitable material, preferably of titanium, the outside of said cup being rotationally symmetrical around a central axis of symmetry. The outer side of the cup (1), that is the side which is to face the bone tissue, is provided with at least one circumferential bead (5) close to the edge of the cup (1), said bead (5) having a barb-like shape in section and consequently allowing the cup (1) to be pushed into said cavity but counteracting the removal of said cup (1) from said cavity, said outer side including said bead(s) (5) being provided with a rough structure serving as a file when said cup (1) is moved or rotated in said cavity.
Abstract:
A prosthetic part (10) for use as an orthopedic implant has a base member defining an outer surface (20) for implantation adjacent a prepared bone surface (21). The outer surface (20) includes a recessed area (16) having a predetermined shape and depth. A first rigid plate (22) having this predetermined shape and having a plurality of elongated slots (26) formed therein is fixedly attached within the recessed area (16) of the base member. A second rigid plate (24) also having the same predetermined shape as the recess and also having a plurality of elongated slots (28) formed therein is attached to the first rigid plate. The elongated slots (28) of the second plate (24) are angularly offset with respect to the elongated slots (26) in the first plate to produce a controlled porosity. The thicknesses of the first and second plates are predetermined so that the outer surface (18) of the second plate is substantially continuous with the non-recessed outer surface (20) of the base member (10).
Abstract:
A method of forming an implant to be implanted into living bone. The implant includes titanium. The method includes deforming at least a portion of a surface of the implant to produce a first micro-scale topography. The method further includes removing at least a portion of the surface to produce a second micro-scale topography superimposed on the first topography. The second micro-scale topography is generally less coarse than the first micro-scale topography. The method further includes adding a submicron topography superimposed on the first and second micro-scale topographies, the submicron topography including tube-like structures.