Abstract: A surgical component, a kit including the surgical component, and a surgical method. The surgical component includes a body portion. The surgical component also includes an elongate stem for inserting into an intramedullary canal of a patient. The elongate stem extends distally from the body portion. The elongate stem has a longitudinal axis; a proximal end; a distal end; and a plurality of splines located on an outer surface of the stem. The splines are circumferentially arranged around the stem. At least some of the splines are tapered such that each tapered spline is narrower at a distal part of that spline than at a part of that spline that is proximal with respect to the distal part. The surgical component further includes an elongate neck portion extending from the body portion at a non-zero angle with respect to the longitudinal axis of the stem.

Abstract: A set of surgical components for use in a joint arthroplasty to reconstruct a head of a joint is provided. The set of surgical components can include a head member having a first articulating surface opposite a first fixation surface. The first fixation surface can define a first portion that extends outwardly from the first fixation surface. The set of surgical components can include a base member having a fixation peg with three generally triangular fins and a second fixation surface defined as a recess within a top surface of the fixation peg. The first portion of the head member can be received within the recess of the base member to couple the head member to the base member.

Abstract: A femoral neck prosthesis (10) with a cross-section defined by a perimeter comprising: first and second arcuate portions (12, 14) disposed opposite one another; and first and second substantially straight portions (16, 18) disposed opposite one another and in between the first and second arcuate portions, wherein the first and second straight portions are non-parallel with respect to one another.

Abstract: One embodiment of the present invention is a unique prosthetic implant and method for making a prosthetic implant. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for prosthetic implants. Further embodiments, forms, features, aspects, benefits, and advantages of the present application shall become apparent from the description and figures provided herewith.

Abstract: The present invention relates to a hip prosthesis (1) comprising a femoral stem (20) that can be inserted within the medullar channel of a patient femur, the medial side (21) of said femoral stem (20) having, in the proximal portion (40), the shape of an arc, said femoral stem (20) being provided with substantially longitudinal lateral reliefs (60, 61), so that said stem (20) can be fixed to the bone tissue by pressure, and a prosthetic neck (30), provided with means for coupling with a morse cone type spherical head (31), said prosthesis (1) being characterized in that the cross section of said longitudinal reliefs (60, 61) has an apex portion (60?), having the lateral walls included within a first angle (c), and a base portion having the lateral walls included within a second angle (d), which is minor or equal to said first angle (c), and in that grooves (63) are provided between said longitudinal reliefs (60, 61), that can be homogeneously filled with spongious bone tissue.

Abstract: An implant stem (1, 2) for implantation in a femur, comprising: a base portion (3) disposed at the proximal end (4) of the stem and a stem portion (5) extending to the distal end (6) of the stem, wherein the base portion (3) has an engagement means (7) for engaging, in use, with the resected end of the femur. An implant comprising such a stem (1, 2) and a head. A method for implanting such implants in a femur.

Abstract: An intramedullary implant for mounting within an intramedullary canal of a bone is disclosed. The intramedullary implant includes a lower stem portion, an upper stem portion, and a modular sleeve body. The modular sleeve body is connected to one of the lower stem portion or the upper stem portion. The sleeve body includes an inner portion that covers at least a segment of the upper stem portion and has one or more longitudinally extending bone engagement members for engagement with the bone.

Abstract: A modular femoral prosthesis for use during performance of a hip revision procedure includes a proximal body component, a distal stem component, and a locking bolt. Surgical instruments and methods for use in implanting such a modular femoral prosthesis are disclosed.

Abstract: A hip prosthesis includes a straight shaft which is to be inserted into the femur, the straight shaft including a proximal part that is configured to be inserted in the metaphyseal region of the femur. The proximal part has, on each of its front and rear faces, at least one projecting fin with a steep medial flank that deviates at least over part of its length away from the longitudinal direction of the shaft. At its top the proximal part is inclined toward the femoral neck. In this way, when the shaft is driven into the bone, the bone substance surrounding the fin is compacted and is able to absorb greater forces. The height of the fin decreases from its medial flank toward its lateral edge.

Abstract: An intramedullary implant for mounting within an intramedullary canal of a bone is disclosed. The intramedullary implant includes a lower stem portion, an upper stem portion, and a modular sleeve body. The modular sleeve body is connected to one of the lower stem portion or the upper stem portion. The sleeve body includes an inner portion that covers at least a segment of the upper stem portion and has one or more longitudinally extending bone engagement members for engagement with the bone.

Abstract: An intramedullary stem that provides enhanced distal fixation and flexibility and methods for implanting the stem. Certain embodiments of the stem have primary and secondary flutes (or ridges or wedges). Other embodiments have transitional regions.

Abstract: A hip prosthesis includes a shaft which is configured to be anchored in the medullary canal of a femur and whose distal portion, which is to be anchored in the diaphysis, has a core cross-section which tapers toward the distal end and which, at least on the lateral side and medial side, has longitudinal ribs whose height increases from proximal to distal.

Abstract: The invention relates to an implant system having at least one shaft of a prosthesis, in particular a hip joint prosthesis, which can be anchored without cement, and a set of instruments for the preparation of the bone in which the shaft is to be anchored, wherein the shaft has an arcuate base body with a trapezoidal or rectangular cross-section and the set of instruments includes a first instrument which is shaped in accordance with the arcuate shape of the shaft and with which a recess serving for the reception of the base body can be established in the bone; and wherein the shaft is provided with ribs in the proximal region and the set of instruments includes a guide body shaped in accordance with the arcuate shape of the shaft for a second instrument with which structures can be manufactured in the bone serving to fix a path for the shaft ribs when the guide body is located in the recess.

Abstract: The invention relates to an implant system having at least one shaft of a prosthesis, in particular a hip joint prosthesis, which can be anchored without cement, and a set of instruments for the preparation of the bone in which the shaft is to be anchored, wherein the shaft has an arcuate base body with a trapezoidal or rectangular cross-section and the set of instruments includes a first instrument which is shaped in accordance with the arcuate shape of the shaft and with which a recess serving for the reception of the base body can be established in the bone; and wherein the shaft is provided with ribs in the proximal region and the set of instruments includes a guide body shaped in accordance with the arcuate shape of the shaft for a second instrument with which structures can be manufactured in the bone serving to fix a path for the shaft ribs when the guide body is located in the recess.

Abstract: A ball and socket joint prosthesis for use in arthroplasty is provided. The prosthesis includes a body for implantation at least partially within the medullary canal of a long bone. The long bone defines trabeculae in the proximal cancellous bone and lamellae in the cortical bone. The body includes a proximal portion thereof and a distal portion. The proximal portion has a medial periphery and includes surface features on a substantial portion of its proximal portion. The surface features are positioned to optimally transfer load from the prosthesis to the long bone.

Abstract: The present invention is a specialized orthopedic implant having an exterior surface for engaging bone. The surface comprises arrayed projections having at least one forward facing facet directed at least in part toward the leading end of the implant and at least one rearward portion directed at least in part toward the opposite trailing end of the implant. Each of the forward facet and rearward portion has a length and a slope. The length of the forward facet is longer than the length of the rearward facet. The slope of the rearward facet is steeper than the slope of the forward facet. The surface projections also have opposed side facets directed generally toward the sides of the implant. The side facets are located between the forward facet and rearward facet and converge toward each other in a direction away from the base of the surface projections. The surface may also include projections having left and right forward side facets and a rearward facet.

Abstract: A ball and socket joint prosthesis for use in arthroplasty is provided. The prosthesis includes a body for implantation at least partially within the medullary canal of a long bone. The long bone defines trabeculae in the proximal cancellous bone and lamellae in the cortical bone. The body includes a proximal portion thereof and a distal portion. The proximal portion has a medial periphery and includes surface features on a substantial portion of its proximal portion. The surface features are positioned to optimally transfer load from the prosthesis to the long bone.

Abstract: The invention relates to a cement-free hip endoprosthesis for the femur (1), comprising a shaft (2) which can be inserted into the femur (1) and has a curvature, and comprising at least approximately parallel or concentric grooves (3) or ribs (4) along the shaft surface, the proximal end (5) of the shaft (2) being formed without a collar, and the groove base in the proximal region (6) running out in a shoulder-shape for at least a part of the groove (3b), resulting in a good seat in combination with a short design length.

Abstract: A bone prosthesis for implantation at a joint includes a stem having a tip generally at one end thereof. The stem is sized and shaped for reception in a bone at the joint such that the tip of the stem is exposed to locations outside of the bone. The stem has a passageway extending from a first location on the bone prosthesis to a second location on the bone prosthesis.

Abstract: The present invention discloses systems, kits and methods for prosthetic joint replacement. In one embodiment, a modular implantable surgical device including a stem, a neck and a head is disclosed that is suitable for replacement of a hip joint. In another embodiment, a kit is provided that includes at least two stems, necks and heads that can be used by the surgeon to adapt the size and shape of the assembled prosthetic device to conform to an individual patient's anatomy. In a practice according to the methods of the present invention, steps are disclosed for positioning the prosthesis in an individual patient in an anatomically correct position.

Abstract: Arthroplasty devices having improved bone in growth to provide a more secure connection within the body. Different embodiments disclosed include devices having threaded intramedullary components, devices configured to receive bone growth promoting substances, devices with resorbable components, and devices configured to reduce shear stress.

Abstract: A ball and socket joint prosthesis (10) for use in arthroplasty is provided. The prosthesis includes a body (32) for implantation at least partially within the medullary canal (24) of a long bone (12). The long bone defines trabeculae (60) in the proximal cancellous bone (22) and lamellae (71) in the cortical bone (65). The body includes a proximal portion (52) thereof and a distal portion (54). The proximal portion has a medial periphery (69) and includes surface features (64) on a substantial portion of its proximal portion. The surface features are positioned to optimally transfer load from the prosthesis to the long bone.

Abstract: Leaflike shaft (1) of a hip-joint prosthesis for anchoring in the femur, according to a towards a distal end (5) [sic], with a femur-anchoring section (1a, . . . 1i) having a long axis (A) and with a prosthesis neck (2), wherein the femur-anchoring section 1a, . . . 1i) has a substantially rectangular external contour in a plane perpendicular to the long axis (A), optionally with recesses in the side edges and/or at the corners.

Abstract: Leaflike shaft (1) of a hip-joint prosthesis for anchoring in the femur, according to a towards a distal end (5) [sic], with a femur-anchoring section (1a, . . . 1i) having a long axis (A) and with a prosthesis neck (2), wherein the femur-anchoring section 1a, . . . 1i) has a substantially rectangular external contour in a plane perpendicular to the long axis (A), optionally with recesses in the side edges and/or at the corners.

Abstract: A ball and socket joint prosthesis (10) for use in arthroplasty is provided. The prosthesis includes a body (32) for implantation at least partially within the medullary canal (24) of a long bone (12). The long bone defines trabeculae (60) in the proximal cancellous bone (22) and lamellae (71) in the cortical bone (65). The body includes a proximal portion (52) thereof and a distal portion (54). The proximal portion has a medial periphery (69) and includes surface features (64) on a substantial portion of its proximal portion. The surface features are positioned to optimally transfer load from the prosthesis to the long bone.

Abstract: Hip-joint endoprosthesis system with a plurality of, in particular leaflike, prosthesis shafts (1.1′, 1.2′) for anchoring in the femur, wherein each shaft expands substantially on all sides from a distal end (5) towards proximal and comprises an anchoring section with a shaft long axis (AS) that merges medially with an arch (7.1′, 7.2′) that continues into a prosthesis neck (9.1′, 9.2′) with a prosthesis-neck axis (AH), such that the shafts differ with respect to a reference-point distance (A1′, A2′, A3′) between the shaft long axis and a reference point (R1′, R2′, R3′) on the prosthesis neck axis, which identifies the position of the center point of a joint ball set onto the prosthesis neck, and such that that the length (l) of the projection of the overall extent of the prosthesis shaft from the distal end of the anchoring section to the reference point or to the proximal end of the prosthesis neck is the same in all prosthesis shafts.

Abstract: A prosthetic femoral component is located in a prepared socket in a femur which has been resected at a position on the proximal side of its neck and includes a tapered insert and a proximal head portion. The proximal end of the insert portion is adapted for location in the prepared socket and has a maximum dimension in a plane normal to the distal-proximal axis of the neck which is larger than the minimum dimension of the neck in a parallel plane. The component takes advantage of the bone at the periphery of the socket which enables the insert to be accurately and firmly located in the bone. The presence of the bone at the outer edges of the socket helps to stabilize the component. Preferably the tapered insert portion is flared outwardly in the proximal direction. The tapered insert portion can be dimensioned to pass through the neck of the femur with which it is to be used or it can stop short of it.

Abstract: A prosthesis system consisting of an endoprosthesis with a shank which is to be introduced into the medullary canal of a bone, and of a rasp (20) which is similar in shape to the shank and is used to prepare a cavity for receiving the shank. Along much of its length, the rasp has an untoothed profile part (25) which, instead of excavating the spongy bone substance, compacts the latter and thus ensures a secure fit of the prosthesis. In the area corresponding to the untoothed area of the rasp (20), the prosthesis shank preferably has a rib which cuts like a wedge into the compacted spongy substance.

Abstract: In a long bone endoprosthesis, the anchoring shaft on at least a part of its length has a cross section of generally rectangular or other polygonal shape and with rounded corners and straight side sections allowing the anchoring shaft to fit more closely with the bone when the anchoring shaft is inserted into a bone recess cut with a rotary cutting head having a minimum radius, the rounded corners of the anchoring shaft having radii equal to or greater than the minimum radius of the cutter head.

Abstract: A femur component of a hip joint endoprosthesis which has a shaft (1) for anchoring in the medullary cavity of the femur. The shaft (1) has a distal section (9) and a proximal section (8), to which is connected a collar section (2) with a peg (3) for receiving an articular head, or with an articular head which is firmly attached to the collar section (2). The shaft (1) has a front surface (4), a rear surface (5), a lateral side (6), a mesial side (7) and a plane of symmetry (11), whereby longitudinal ribs (10) which stretch from proximal to distal are fitted on the front surface (4) and the rear surface (5) in the proximal section (8) of the shaft (1). The crests (12) of the longitudinal ribs (10) form an angle &dgr;/2 of at least 1° to the plane of symmetry (11), and the envelope of the crests (123) of the longitudinal ribs (10) forms a double wedge-like or ellipsoid body, which tapers both toward the lateral side (6) and the mesial side (7).