摘要:
A structure adapted to assume an expanded geometry having a desired configuration when used in bone includes material that limits the expanded geometry. The structure undergoes stress when expanded during its first use in bone. As a result, the structure can not be relied upon to reach its desired configuration during subsequent use in bone. Accordingly, the structure is packaged in a sterile kit, which verifies to the physician or user that the device packaged within it is sterile and has not be subjected to prior use. The physician or user is thereby assured that the expandable structure meets established performance and sterility specifications, and will have the desired configuration when expanded for use.
摘要:
A method of treating a spinal disk according to the present invention can include inserting an alloplastic bulking agent into the spinal disk to treat the defect. The alloplastic bulking agent has a plurality of microparticles. The bulking agent results in at least one of sealing the defect, increasing a pressure of the disk, increasing a height of the disk, improving stability of the disk and improving structural integrity of the disk.
摘要:
An intervertebral disk prosthesis includes a first part, and the first part has a top, a bottom having an opening, an outer surface, an inner surface and a socket extending into an interior of the first part from the opening and defined by the inner surface. The outer surface proximate the top contacts a concave portion of a first vertebra. The disk prosthesis further includes a second part including a top, a bottom, and an outer surface. The outer surface proximate the bottom contacts a concave portion of a second vertebra, and the outer surface of the second part proximate the top of the second part cooperatively engages the inner surface of the first part thereby allowing at least two-degrees of freedom of movement.
摘要:
The invention discloses an implantable facet arthroplasty device suitable for treating adjacent level disease. The device is designed for implantation between a first vertebra and a second vertebra. Components of the device include: a crossbar; a first component having a first attachment mechanism adapted to attach to a first location of a spinal fusion device attached to a first vertebra and a second attachment mechanism adapted to attach to the crossbar; and a second component having a second attachment mechanism adapted to attach to a second location of a spinal fusion device attached to the first vertebra and a second attachment mechanism adapted to attach to the crossbar. The first component articulates relative to the second component and the first vertebra articulates relative to the device itself.
摘要:
An intervertebral motion disc comprising core material surrounded by a non-resorbable outer shell having a sidewall surrounding the core, wherein the sidewall of the outer shell has a hardness of more than 80 Shore A.
摘要:
Artificial disc devices are disclosed that restore correct anatomical intervertebral spacing for damaged discs while maintaining a substantially normal range of biomechanical movement for the vertebrae between which they are implanted. The disc devices include center bearing and outer or annular bearing portions with the center bearing portion including generally axially extending locating surfaces which cooperate with the facing vertebral surfaces to resist migration. The outer bearing portion is for load bearing or load sharing with the center bearing portion and includes surfaces that extend radially toward the periphery of the vertebrae so that subsidence about the center bearing portion is minimized. Alternate forms of the disc devices include one with an axially enlarged center ball bearing having an annular ring bearing extending thereabout and another having upper and lower plate members with a central bumper member and a surrounding resilient annular member therebetween.
摘要:
The invention relates to an implant (100) for partially replacing surfaces that are subject to stresses, especially the surfaces of a joint. Said implant comprises a spherical or axial, preferably cylindrical base (116) to be inserted in an area removed from the bone, e.g. a punched or drilled area. The base comprises at least one surface (104) for replacing the section (112) to be replaced and/or an adapter for receiving an element carrying the section, e.g. a joint surface element, tooth or pivot tooth. The system for inserting the implant comprises an angle determination system (10) in the form of elliptical plates (14, 16, 18) of different diameter and cutting angle to be placed onto the joint section to be restored to determine the angle and/or the size of the substitute material to be implanted, an angle guiding device (20) comprising a fixing extension (14, 16, 18, 30) to be inserted between the joint surfaces, and an angle adjusting device (24) linked with the fixing extension and comprising at least one guide element (26) whose angle can be adjusted or which can be disposed in an angle-defined position, for placing at least one guide wire (32) in the operation field or bore guide (40) for a tubular drill (60). The system further comprises a drill system that comprises at least one drill/punch (60) that can be guided through the bore guide (40). Said bore guide is held in a fixed relative position to the joint section to be restored either by the angle adjusting device (24) or by the guide wire (32). The invention further relates to an angle determining system in the form of elliptical plates (14, 16, 18), an oscillation drill device and hollow cylinder drills (64, 66) or punches having a beveled tip (68, 70).
摘要:
Artificial disc devices are disclosed that restore correct anatomical intervertebral spacing for damaged discs while maintaining a substantially normal range of biomechanical movement for the vertebrae between which they are implanted. The disc devices include center bearing and outer or annular bearing portions with the center bearing portion including generally axially extending locating surfaces which cooperate with the facing vertebral surfaces to resist migration. The outer bearing portion is for load bearing or load sharing with the center bearing portion and includes surfaces that extend radially toward the periphery of the vertebrae so that subsidence about the center bearing portion is minimized. Alternate forms of the disc devices include one with an axially enlarged center ball bearing having an annular ring bearing extending thereabout and another having upper and lower plate members with a central bumper member and a surrounding resilient annular member therebetween.
摘要:
An intervertebral disc prosthesis for placement between a first vertebra and a second vertebra adjacent to the first vertebra. In one embodiment, the intervertebral disc prosthesis includes a resilient member, a first support member and a second support member. The resilient member has an axis and a thickness that aries at least in one direction perpendicular to the axis. The first support member and the second support member are received in the resilient member that is arranged, in use, to be secured to the first vertebra and the second vertebra, respectively. The intervertebral disc prosthesis can generate a coupled motion in more than one possible direction responsive to a possible movement of at least one of the first vertebra and the second vertebra, among the resilient member, the first support member and the second support member.
摘要:
A joint prosthesis comprising an acetabular cup comprising at least a first and a second load carrying member, the first load carrying member being substantially more shock absorbing and resilient that the second load carrying member.