A tunable implant, system, and method enables a tunable implant to be adjusted within a patient. The tunable implant includes a securing mechanism to secure the implant in the patient, a actuation portion that enables the implant to move and an adjustment portion that permits adjustment of the implant after the implant has been positioned within the patient. The method of adjusting the tunable implant includes analyzing the operation of the implant, determining if any adjustments are necessary and adjusting the implant to improve implant performance. The implant system includes both the tunable implant and a telemetric system that is operable to telemetrically receive data from the tunable implant where the data is used to determine if adjustment of the tunable implant is necessary. The system also includes an instrument assembly that is used for performing spinal surgery where the instrument assembly includes a mounting platform and a jig.

A tunable implant, system, and method enables a tunable implant to be adjusted within a patient. The tunable implant includes a securing mechanism to secure the implant in the patient, a actuation portion that enables the implant to move and an adjustment portion that permits adjustment of the implant after the implant has been positioned within the patient. The method of adjusting the tunable implant includes analyzing the operation of the implant, determining if any adjustments are necessary and adjusting the implant to improve implant performance. The implant system includes both the tunable implant and a telemetric system that is operable to telemetrically receive data from the tunable implant where the data is used to determine if adjustment of the tunable implant is necessary. The system also includes an instrument assembly that is used for performing spinal surgery where the instrument assembly includes a mounting platform and a jig.

To provide a sliding member having improved wear resistance, and a method of manufacturing the sliding member. A femoral head ball according to an aspect of the present disclosure includes a composite ceramic containing alumina and at least one oxide other than alumina. A surface roughness Ra of the sliding surface when the femoral head ball slides against a constituent member constituting an artificial joint is not more than 0.01 μm. The sliding surface includes a plurality of recessed portions each having an opening diameter of not more than 2 μm.

To provide a sliding member having improved wear resistance, and a method of manufacturing the sliding member. A femoral head ball according to an aspect of the present disclosure includes a composite ceramic containing alumina and at least one oxide other than alumina. A surface roughness Ra of the sliding surface when the femoral head ball slides against a constituent member constituting an artificial joint is not more than 0.01 μm. The sliding surface includes a plurality of recessed portions each having an opening diameter of not more than 2 μm.

A wing-shaped stemless hip joint prosthesis comprises a wing-shaped cup body which can be tightly covered on the femoral neck and the intertrochanter to fix an artificial spherical end and the femoral tissue into a whole, wherein the wing-shaped cup body integrally in an inverted cup form is inversely buckled outside the residual end of the femoral neck and is reinforced through a center lock pin and a tail pin; the wing-shaped cup body is provided with a lesser trochanter protecting wing buckled outside the lesser trochanter and a cup wing covered outside the intertrochanter line to acquire the additional supports and to be more stable accordingly; and the wing-shaped cup body is further provided with a large opening or hole so as to contain the nourishing blood vessels of the femur, accordingly decreasing the damage rate of the nourishing blood vessels and improving the postoperative recovery effect.

A flexible hip joint stem includes a shoulder body connecting piece, a flexible stem body, a stem tail, and a center regulating rod. The flexible stem body includes an inner-layer cylinder and an outer-layer cylinder. The inner-layer cylinder and the outer-layer cylinder are both composed of spiral springs, where the spring wire width of the spiral springs is basically equal to the screw pitch. The regulating rod passes through the shoulder body connecting piece and the flexible stem body, and is fixed with the stem tail by screwing the threads, which allows the inner-layer cylinder and the outer-layer cylinder to produce a certain degree of elastic deformation, limits the range of the elastic deformation, and enables the flexible hip joint stem to have sufficient supporting strength as a whole.

The present invention discloses a connected structure of a porous surface structure and a substrate, a method for preparing the same, and a prosthesis of the same. The connected structure consists of a pre-connected or integrally formed composite body of a porous surface structure and an intermediate; and a substrate, which is connected to said intermediate to achieve the connection of said composite body to the said substrate; the composite body comprising a first composite region corresponding to a first stiffness; a remaining composite region in the composite body other than the first composite region, which at least contains a second composite region corresponding to a second stiffness; and the first stiffness is less than the second stiffness. The present invention achieves a fastened connection between the composite and the substrate and largely maintains the mechanical properties of the substrate; and it provides a prosthesis with excellent bone ingrowth properties and that the strength of the substrate is not substantially affected.

A medical device for treating hip joint osteoarthritis in a human patient by providing at least one artificial hip joint surface. The medical device comprises a prosthetic part or a bone plug adapted to be placed in a hole in the pelvic bone and a supporting member connected to said prosthetic part or bone plug, wherein the prosthetic part or the bone plug is adapted to be inserted into said hole from the abdominal side of the acetabulum and oriented, during the insertion, such that the concave interior surface is facing in the direction towards the caput femur. Wherein the medical device comprises an artificial caput femur surface or artificial acetabulum surface, and wherein a largest cross-sectional distance of said artificial caput femur or acetabulum surface is smaller than said hole, such that said artificial caput femur surface can pass through said hole.

Implants and methods for augmentation of the disc space between two vertebral bodies to treat disease or abnormal pathology conditions in spinal applications. The implant includes a chain of biocompatible material suitable for insertion into a disc space between two adjacent vertebral bodies in a patient's spinal column, wherein the spinal disc space has a transverse plane. The chain comprises a plurality of adjacent bodies having a height configured to reside within the disc space between two adjacent vertebral bodies and a length configured to reside in the disc space between two adjacent vertebral bodies when the chain is curved in an orientation substantially along the transverse plane of the spinal disc space.

A medical implant includes a first implant body and a pre-coating covering at least a portion of an outer surface of the first implant body. The pre-coating has a negative Poisson's ratio. A method of making a medical implant includes applying a precursor material on a surface of a first implant body, the first implant body having a positive Poisson's ratio. A stimulus is applied to the precursor material, the stimulus causing the precursor material to form a coating having a negative Poisson's ratio