摘要:
The present invention provides a joint prosthesis system for the joining of two bones. The bioabsorbable joint prosthesis system includes at least one bioabsorbable spacer and at least one connector adapted to be fixedly attached to the two bones, at least a portion of the connector being in contact with the spacer to prevent lateral movement of the spacer. The present invention also includes embodiments drawn to methods of using the joint prosthesis system. In an embodiment of the present invention, the method includes interposing at least one bioabsorbable spacer between the surface of the bones to be joined and connecting the bones with at least one connector such that at least a part of the connector contacts the bioabsorbable spacer.
摘要:
An implant (prosthesis) comprising a batch of a mixture of porous grains/granular material of tissue-compatible type and disintegrated tissue-compatible biological material (preferably endogenous material, such as bone meal). The batch further comprises a component which allows moulding or modelling of the batch, and the batch is enclosed in a pouch or wrap made of a flexible tissue-compatible material and having pores/apertures/perforations or the like of a size which allows outgrowth and ingrowth of tissue of the biological material. The implant is applicable in many contexts, such as a fixing agent for a hip-bone prosthesis, as a filler in plastic surgery and as a bone growth promoting agent when treating rheumatism.
摘要:
An allogenic intervertebral implant for fusing vertebrae is disclosed. The implant is a piece of allogenic bone conforming in size and shape with a portion of an end plate of a vertebra. The implant has a wedge-shaped profile to restore disc height and the natural curvature of the spine. The top and bottom surfaces of the implant have a plurality of teeth to resist expulsion and provide initial stability. The implant according to the present invention provides initial stability need for fusion without stress shielding.
摘要:
A method and apparatus for minimally invasive total joint replacement. The method involves sculpting the articular surface of a second bone that normally articulates with a first bone by attaching a bone sculpting tool directly or indirectly to the first bone with the tool in bone sculpting engagement with the articular surface of the second bone, and then sculpting the articular surface of the second bone with the joint reduced and moving one bone with respect to the other. An implant is placed to replace the articular surface of the second bone using an impaction device directly or indirectly attached to the first bone, wherein the force to place the implant is reacted by the second bone and the first bone.
摘要:
The present invention provides a highly polished femoral implant (1) having a proximal neck portion (10), a distal tip portion (30), and an elongate stem portion (20) that extends from the neck portion to the tip portion. The stem portion (20) has a proximal or metaphyseal end region (21) which adjoins the neck portion (10), the proximal/metaphyseal end region (21) having a profile in the medio-lateral plane defined by a curved or angled medial outer contour and a curved or straight lateral outer contour. The stem portion (20) of the implant has a first part (24) adjacent said end region (21) having a profile in the medio-lateral plane which tapers distally at a first angle of taper to a region intermediate the length of the stem portion, and a second part (25,26) distal of the first part (24) having a profile in the medio-lateral plane which tapers distally at a second angle of taper from the region intermediate the length of the stem portion.
摘要:
A spacer assembly is provided for use in spinal surgeries. The spacer assembly includes a spacer having opposite ends and a side wall extending between the opposite ends and at least one end cap coupled to at least one of the opposite ends of the spacer. Each end cap includes an inner end facing the spacer, an outer end having a serrated surface, and a side wall extending between the inner and outer ends. The side wall of each end cap is formed for engagement with the side wall of the spacer to provide a mechanical connection between the end cap and the spacer.
摘要:
An alignable orthopedic prosthesis system includes a prosthesis and an alignment guide. The prosthesis includes a stem having at least one keyed component extending along its outer surface. The alignment guide has an alignment body with a guide surface disposed on an inner portion thereof. The guide surface has a key element formed therein for engageably receiving the keyed component of the prosthesis.
摘要:
An expandable osteosynthesis implant has branches (5) each connected at one end to a seat (7) which is pierced by an orifice (8), suitable for being slid from a posterior direction between the facing faces of two consecutive vertebrae in order to hold them a given distance apart and restore stability of the spinal column. According to the invention, the branches (5) and the seat (7) define a hollow cage (1) which, in a “rest” position, has an outside general shape that is a cylinder of circular section, and a portion at least of the inside volume (9) of the cage (1) towards the distal ends of the branches (5) is in the form of a circular truncated cone whose large base is towards the seat (7), which implant has at least three branches (5) and, inside the inside volume (9) at least one spacer (2) suitable for passing through the orifice (8) and the large base of the truncated cone.
摘要:
The figures show a cementable shaft prosthesis (1) comprising a centering apparatus (2) of plastic which can be pushed on at its distal shaft end (3) and which forms a cavity (4) to the distal shaft end (3). Between the distal shaft end (3) and the centering apparatus (2) there exists a clamping connection which enables a deeper sinking in of the shaft end into the cavity in the distal direction. The clamping connection is achieved by a spigot (7) which is formed on at the centering apparatus (2) in the cavity (4) and which protrudes in into a conical bore (5) of the shaft end (3) in the proximal direction.
摘要:
A femoral component for a hip replacement joint having a tapered collarless stem for being cemented in a medullary canal. The proximal portion of the stem has a taper and the distal segment is generally circular in cross-section and has a length equal to or greater than the proximal portion. The component can be made in two separate pieces and can be coupled in the metaphysical area of the femur. In one embodiment, at the proximal end of the stem, there is a pronounced laterally projecting heel adapted to extend into the greater trochanter of the femur of the femur into which it is to be filled. Thus, the distal facing part of the heel can provide a lateral portion which is greater than that of known collarless stems and which is particularly adapted to resist torque. In order to fit the femoral component in the medullary canal, it is necessary to broach the medullary canal so that there is a cavity within the greater trochanter.