摘要:
Blood vessels and other body lumens are stented using multiple, discreet stent structures, or continuous coiled or mesh stent structures. Stent structures may be balloon expandable or self-expanding and are delivered by a delivery catheter which is repositioned to spaced-apart delivery sights. By coating the stents with particular biologically active substances, hyperplasia within and between the implanted stents can be inhibited. An exemplary delivery catheter comprises a catheter body having a deployment mechanism for deploying one or more stents of selectable length into the vessel.
摘要:
A method for preparing and cutting the radial and carpal bones to receive a prosthetic wrist during a total wrist arthroplasty. Cuts on both the radius and carpal bones are made from a single broach. The broach is embedded in the intramedullary canal of the radius and a cutting tool is attached to an end of the broach to resect the radius. With the cutting tool removed, a cut block is attached to the broach and the carpal bones are resected. The cut block has a thickness that equal the thickness of the bearing component of the wrist prosthesis.
摘要:
The ankle joint prosthesis adapted to involve the patient's distal tibia and talus has, according to the present invention, tibial, talar and mobile or semi-constrained bearing components that are laterally to medially implanted in the patient. The tibial component's top surface has convex curvature in its anterior to posterior plane and is configured so as to approximate and match with the curvature of a prepared portion of the distal tibia; its bottom surface being approximately flat. The talar component's top surface has saddle-shaped, convex curvature in its anterior to posterior plane, it's bottom surface has concave curvature and is configured so as to approximate and match with the curvature of a prepared portion of the talus. The mobile or semi-constrained bearing components have embodiments that comprise a wide variety of geometric shapes. A method for implanting such a prosthesis is also disclosed.
摘要:
According to the state of the art, the replacement of a basal finger joint is effected by, for example, interposition of soft part tissue or a distance piece, which does not, however, constitute a replacement joint. In joint prostheses with a metal-metal sliding combination, but in particular with a metal/polyethylene sliding combination, wear of the material can lead to osteolyses at the bone ends. Owing to the fact that the metal or plastic joint prostheses known from the state of the art are as a rule multipart, loosening of the individual components can occur, which shorten the service life of the implant. According to the invention, it is therefore proposed that the implant (1) is an uncoupled, two-part implant.
摘要:
The invention concerns a wrist prosthesis wherein the surfaces of the spherical caps of the base plates of the lateral rods are pressed against the corresponding concave surfaces of the seat under the action of the spindle made of elastic material maintained in extension between the two pairs of half-locks. Each of the pairs of semi-cylindrical elements is maintained assembled by being engaged from outside inwards in the central passage of one of the rods and locks one of the cylindrical ends of the central part of the spindle. The central rod is engaged by its shaft in a transverse blind bore of the seat and the groove provided in the flanks of its slot is clipped on the rim of the spindle.
摘要:
A wrist prosthesis has first, second, and third components that in one form are a radial component, a metacarpal component, and a bearing component. The bearing component is non-fixed or non-stationary relative to one of the radial component and the metacarpal component when the wrist prosthesis is assembled such as when implanted into a patient. As such, in one form a rotational joint or union is provided on the radial component and the bearing component. The bearing component is thus free to rotationally ride on the radial component, preferably 360null thereabout. Distal the radial component, the bearing component includes an articulation surface. The metacarpal component includes an articulation surface that is complementary to the articulation surface of the bearing component. In this manner, the metacarpal component correspondingly moves relative to the bearing component. The bearing component is preferably made of a polymer such as polyethylene.
摘要:
A joint prosthetic component that includes first and second arms, and a joint member interposed therebetween. The joint member is configured to permit flexion motion between the first and second arms, and includes a first concave surface and a second concave surface. The first concave surface has a plurality of arcuate portions defined therein. The first and second concave surfaces are located on opposing sides of the joint member.
摘要:
This invention relates to a malleolar implant for partial or total ankle prosthesis, comprising a head, intended to bear against the astragalus or astragalian prosthetic component and a shank provided to be introduced in a bore in the fibula, characterized in that said shank is provided with means for hooking a traction member adapted to be manoeuvred from the outer side of the fibula, in order to position said shank in said bore. The ancillary tool comprises a spacer block adapted to be inserted between the tibia and the astragalus of an ankle, and a lug fast with said block and extending up to the vicinity of the outer surface of the fibular malleolus when the spacer block is in position, said lug supporting a guide for boring the malleolus from its outer surface.
摘要:
The present invention provides a prosthesis for implantation at the proximal articular surface of a proximal phalange, of a human great toe. The prosthesis comprises a base portion having a generally concave bearing surface shaped to articulate with the distal articular surface of a metatarsal bone, and a flat surface opposite the bearing surface for emplacement against a resected surface of the proximal phalange of the great toe of the human subject. A stem extends distally from the flat surface of the base portion, for implantation in the intramedulary canal of a proximal phalange of the great toe of the human subject. The stem has a generally frustoconical shape, with a substantially oval wide end at the flat surface of the base portion, tapering to a substantially circular end. The generally frustoconically shaped stem has a longitudinal axis that is inclined at an anatomical angle, of about 94null to the base portion, to align with the intramedulary canal of a proximal phalanx of the great toe of the human subject.
摘要:
An articulating implant system is provided for fixation to a bone. The articulating implant system includes a fixation component for fixation to the bone and an articulating member for articulating against bone or cartilage. Specifically, a modular ulnar implant is provided in accordance with the articulating implant system of the present invention wherein the fixation component is a stem for insertion into the intramedullary canal of the distal ulna and the articulating member is a head for articulating with the radial sigmoid notch.