摘要:
An implant for orthopedic surgery includes an impaling member (101,102), which is separable into portions (102a, 102b) for impaling and attaching to tissue, for example, bone. Once the portions (102a, 102b) of the impaling member (101,102) are separated and attached to the requisite tissue, they may accommodate stabilizing members for fixation, or other instrumentation for procedures such as fusion.
摘要:
Various embodiments of mosaicplasty constructs and methods for implanting the constructs into anatomical structures. The mosaicplasty constructs may be formed from artificial materials and may include a hard articulating portion and a relatively softer elastic, support portion. The mosaicplasty constructs may include bone ingrowth materials to facilitate ingrowth of bone and other tissues into the construct. The mosaicplasty constructs may also be at least partially formed of hydrogel materials.
摘要:
An intervertebral disk arthroplasty device adapted to replace a disk between a first vertebra and a second vertebra in the spine, said arthroplasty device comprising a first member having a first joint surface, a top surface opposite said first joint surface, a first posterior end and a first anterior end; a second member having a second joint surface facing said first joint surface, a bottom surface opposite said second joint surface, and second posterior and anterior ends juxtaposed with corresponding ones of said first posterior and anterior ends; a first insert cup having a first receiving surface for receiving said top surface, and a first engaging surface opposite said first receiving surface for engaging the first vertebra; a second insert cup having a second receiving surface for receiving said bottom surface, and a second engaging surface opposite said second receiving surface for engaging the second vertebra; and retaining ribs disposed on each of said first and second engaging surface and extending parallel with said anterior and posterior ends of said first and second members, said retaining ribs being configured to permit movement of the disk arthroplasty device in a first direction and to resist movement of said disk arthroplasty device in an opposite direction.
摘要:
A small profile, cylindrically shaped prosthetic disc device (10) is provided. The device housing is comprised of two longitudinally split hollow halves (20, 30), between which are contained multiple discoid shaped resilient bodies (41, 42) which may be of a polymeric type, or they may contain hydrogel. These bodies may lie in concave surfaces (51, 52) located on the interior of each side of the split cylindrical housing. The housing halves (20, 30) even under maximum physiological loads, do not contact one another directly. Threads on the exterior surface of the cylindrical housing facilitates insertion and retention in the prepared bone opening.
摘要:
The present invention relates to an implant comprising two or more bone fragments that are combined to form a single unit. Cancellous bone or cortical bone is removed from a source and fashioned into bone components with desirable shapes and sizes. The bone components may be integrated to form implants for implantation in the body. Bone stock may be formed by combining sections of various bones of the body, and the bone stock may be further fashioned for use as implants with particular geometries.
摘要:
A total disc replacement (TDR) system (10) for use in the spine and related methods, involving a first anchor plate (12) having a first surface (13) for engaging a first vertebra and a second surface including a semi-cylindrical articular surface (18), a second anchor plate (14) having a first surface (15) for engaging a second vertebra and a second surface including a semi-cylindrical articular surface (20), and an intradiscal element (16) including a first articular surface (26) having a generally arcuate cross-section (22) for articulating with said semi-cylindrical articular surface (18) of said first anchor plate (12), and a second articular surface (28) having a generally arcuate cross-section (24) for articulating with said semi-cylindrical articular surface (20) of said second anchor plate (14).
摘要:
An articulating spinal implant for intervertebral disc replacement. The articulating spinal implant is formed from two elements (20, 22), each engaging one of an adjacent pair of vertebra. An articulating means (24) between the two elements resists compression and lateral movement between the vertebra, but allows the adjacent vertebra to articulate about an instantaneous axis of rotation (44).
摘要:
A disk arthroplasty device (310) is provided for replacement of a spinal disk. The device is implantable into a resected disk space and is formed with ball (346) and socket (326) members and shaped to provide lateral bending and backward extension of up to about 5° and forward flexion of up to about 15°. Four embodiments (10), (110), (210) and (310) permit up to about 5° axial rotation and a fifth embodiment (410) permits unrestricted axial rotation. Metal insert cups (70) and (170) are provided for attaching to the device surfaces and are convexly shaped along one axis to conform to the natural contours of the top and bottom vertebra surfaces. The metal insert cups (70) and (170) provide tensile support to the structure and provide for the attachment of additional structures for retaining the device in position after implantation into a disk space.