Abstract: Orthopedic devices are described including polymer compositions used to make the devices. The polymer composition contains a polyoxymethylene polymer in combination with various additives that prevent against agglomerations and spotting even when the composition contains significant amounts of coloring agents and/or waxes. In addition, the polymer composition has reduced formaldehyde emissions and excellent thermal stability properties.

Abstract: A surgical bone rasp includes a body having posterior, anterior, medial, and lateral surfaces. The medial surface includes a proximal curved portion shaped to extend substantially along a concave medial curve. The proximal curved portion includes a plurality of teeth. Each tooth in the plurality includes a tooth gullet wall, a tooth undercut, and a tooth land between the proximal and tooth undercuts. The tooth lands can be generally flat and can extend along the concave medial curve. The tooth gullet walls can be parallel to one another and can be angled to extend away from the body between a distal direction and a medial direction. The tooth undercuts can be parallel to one another, can be angled to extend away from the body in a medial direction, and can be equally spaced apart along the longitudinal axis.

Abstract: Provided herein is a femoral component of a hip implant device, comprising a neck having a central axis; and a body distal to the neck and having a tapered portion, wherein the body has a largest cross section perpendicular to the neck central axis, the largest cross section perpendicular to the neck central axis having a maximum height dimension and a maximum width dimension, wherein the maximum width dimension is 18.5 mm or less. The hip implant can optionally be used in patients of Asian descent.

Abstract: A joint part (1) has a porous portion (2) that is defined by a multiplicity of solid regions where material is present and a remaining multiplicity of pore regions where material is absent, the locations of at least most of the multiplicity of solid regions being defined by one or more mathematical functions. The nature of the porous portion can be varied systematically by changing one or more constants in the mathematical functions and the part is made by a process of solid freeform fabrication.

Abstract: A hip prosthesis has an oblong plate with at one head end a mounting pin provided with a hinge ball, and at the opposite head end a fastening pin for fastening the hip prosthesis in a shaft of a bone. A first part of the plate extends on a first side of the mounting pin. The mounting pin forms an angle ? smaller than 90 degrees with the first part of the plate and the tangent to the fastening pin at the location of the connection between the fastening pin and the first part of the plate forms an angle ? greater than 90 degrees with the first part of the plate. In order to insert the hip prosthesis into a bone in a simple manner, the fastening pin includes a curved shape from the plate onwards in a direction to the first part of the plate.

Abstract: The invention concerns a prosthetic element (1) with an outer surface defining an interface to the surrounding bone or fibrous tissue, wherein the prosthetic element (1) is provided with at least one internal anchoring cavity (6) for the growing of tissue and a least one guide means (5) for a cutting tool. The guide means (5) and the anchoring cavities (6) are positioned essentially within the perimeter/circumference of the prosthetic element (1) defined by the outer surface of the prosthetic element (1). The anchoring cavities (6) and the guide means (5) are interconnected and at least one of the anchoring cavities (6) and/or the guide means (5) has an opening in the outer surface for the growing of tissue into the element (1).

Abstract: A method of forming an implant to be implanted into living bone is disclosed. The method comprises the act of roughening at least a portion of the implant surface to produce a roughened surface. The method further comprises the act of depositing discrete nanoparticles on the roughened surface though a one-step process of exposing the roughened surface to a solution. The nanoparticles comprise a material having a property that promotes osseointegration.

Abstract: The invention relates to an element for incorporation into a prosthetic implant so as to form a bone-contacting portion thereof, the element comprising a rear face, a front face, and a body extending between the rear face and the front face, wherein the front face comprises a basal surface and at least one upstanding portion projecting above the basal surface and having a transverse hole extending therethrough from one side of the upstanding portion to another. It further relates to a prosthetic implant for implantation into a patient so as to contact a bone of the patient, the prosthetic implant comprising a body including a bone-contacting portion for contacting the patient's bone after implantation of the prosthetic implant, wherein the bone-contacting portion is provided with at least one upstanding portion that projects above a surrounding basal surface portion and that is provided with a transverse hole that extends through the upstanding portion from one side to another.

Abstract: A prosthetic femoral implant for use in a hip joint, as a ball and socket type joint, is disclosed. The implant includes a modular neck having a variety of adjustable positions to adjust the lateral offset and version angle of the femoral implant in relation to the femur. The implant further includes a broad, full collar for providing a compression force increasing the interdigitation between the interface of the bone, implant and cement. The implant also includes a stem having a depression having a roughened porous surface for resisting the increased torsional loads placed on the implant due to the increased lateral offset and version angle. The stem further comprises three distinct zones, each zone having its own roughened surface creating a tripartite differential porosity.

Abstract: Compositions and methods are provided for preparing a metal substrate having a uniform textured surface with a plurality of indentations with a diameter in the nanometer and micrometer range. The textured surface is produced by exposing the substrate to an etching fluid comprising a hydrohalic acid and a mixture of a hydrohalic acid and an oxyacid, a chloride containing compound, and an oxidant. The etching solution can be used at ambient temperature. This textured surface enhances adherence of coatings or cells onto the textured surface, improves the retention of proteins on the surface, and encourages bone in-growth.

Abstract: A prosthetic femoral implant for use in a hip joint, as a ball and socket type joint, is disclosed. The implant includes a modular neck having a variety of adjustable positions to adjust the lateral offset and version angle of the femoral implant in relation to the femur. The implant further includes a broad, full collar for providing a compression force increasing the interdigitation between the interface of the bone, implant and cement. The implant also includes a stem having a depression having a roughened porous surface for resisting the increased torsional loads placed on the implant due to the increased lateral offset and version angle. The stem further comprises three distinct zones, each zone having its own roughened surface creating a tripartite differential porosity.

Abstract: A textured surface and oxidation layer coating on a metallic material is accomplished through the chemical and/or electrochemical etching of the surface to modify the surface texture and an in-situ oxidation procedure. The surface is useful for the fabrication of prosthetic devices, particularly medical implants, due to the corrosion and wear resistance imparted by the oxidation layer and the ability to enhance grafting of the implant onto bone imparted by the surface texture.

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: 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 method of forming a roughened, decontaminated surface on a metal article which includes the single or multiple blasting of the surface with a chilled iron grit of appropriate roughness structure followed by acid pickling to produce a contamination free surface of substantially Sq 5 to 10 microns.

Abstract: Prosthetic joint replacement ensemble includes an artificial joint implant component having a non-bone-interfacing rough surface for ingrowth of fibrous tissue, preferably about a peripheral boundary. The component can be made of metal, and have the rough surface provided by porous metal coating. When the prosthesis is implanted, the extramedullary rough surface engenders ingrowth of soft fibrous tissue so that it forms, as it were, a reconstituted capsular “bag” in which wear debris from the joint, for example, ultra high molecular weight polyethylene wear debris, is trapped, thus keeping those particles from gaining access to supporting bone at the bone-prosthetic interface. And so, with mitigation of wear debris dispersion, debris wear-induced osteolysis can be ameliorated.

Abstract: A surgical implant having a datum surface for engaging tissue. Embodiments of the surgical implant include a recess in an original datum surface having a sharp undercut ovoid configuration and a multiplicity of recesses that are interconnected.

Abstract: A stem of an artificial hip joint is capable of removing a gap that may be formed between a proximal portion of a femur and a backside of the stem. The stem has an upper end portion 11 to face a proximal side and a backside 15 to face a greater trochanter 33 and is adapted for insertion into, and fixation to, a medullary space of a femur, and the stem has a through bore 17 opened both to said upper end portion and the vicinity of proximal end of said backside.

Abstract: A prosthetic femoral implant for use in a hip joint, as a ball and socket type joint, is disclosed. The implant includes a modular neck having a variety of adjustable positions to adjust the lateral offset and version angle of the femoral implant in relation to the femur. The implant further includes a broad, full collar for providing a compression force increasing the interdigitation between the interface of the bone, implant and cement. The implant also includes a stem having a depression having a roughened porous surface for resisting the increased torsional loads placed on the implant due to the increased lateral offset and version angle. The stem further comprises three distinct zones, each zone having its own roughened surface creating a tripartite differential porosity.

Abstract: A hip-joint endoprosthesis as a surface replacement for the proximal femur is proposed, which hip-joint endoprosthesis can be secured in the neck of the femur without cement.

Abstract: The invention relates to joint prosthesis elements, to a method of manufacturing prostheses, and to a kit for putting said prostheses into place. The prosthesis element which is put into place in a resection in the joint surface is defined by a contact surface C, a fixing surface F and, interconnecting said surfaces, a peripheral surface P which co-operates with a projecting rim R of the resection. An anchoring element A projects from the fixing face and penetrates into a corresponding anchoring hole D.