102 results about "Bone chamber" patented technology

A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of a cavity of a bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the support structure by an adhesive. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining the channel between the pair of components.

An arrangement for internal bone support. The arrangement includes a support device insertable in a cavity of the bone to be supported. The support device includes a frame having first and second end sections, the frame including a plurality of longitudinally arranged strips. The frame is capable to expand from a reduced configuration to an expanded configuration in a direction perpendicular to the longitudinal centre line of the frame.

The invention relates to a prosthetic implant comprising a main body portion having a first surface for presentation to a receptive bone surface or into a bone cavity and a second surface for receipt of an articulating joint, and means on the implant adapted for attachment of a filamentary member, such as a cable. The invention also relates to a surgical tool for gripping the implant, comprising an elongate body having a first end surface for bearing on the prosthetic implant and means for attachment of the tool to the implant, directly or indirectly by means of the cable.

A kit (10) for preparation of a bone cavity (12) in a bone (14) for implantation of a joint prosthesis (16) is provided. The kit (10) includes a guide (20) defining an opening (22) therethrough. The guide (20) is in cooperation with the prosthesis. The kit (10) also includes a rotatable tool (24) constrainable within the opening (22) of said guide (20). The tool (24) is adapted for removal of bone (14) to form the bone cavity (12).

Apparatus and methods are disposed for maintaining the proper positioning of a prosthetic implant having proximal and distal ends within a prepared bone cavity during cement injection and curing. First stabilization means, implantable within the bone cavity, minimize lateral movement of the distal end of the implant, while second stabilization means, physically separate from the means for minimizing lateral movement of the distal end of the implant, minimize both the lateral movement of the proximal end of the implant and the rotational movement of the implant overall. In the preferred embodiment, the second stabilization means includes an apertured cap removably securable to the end of a bone having the prepared cavity through which the implant is inserted and held in place. This cap, which may either be entirely rigid or include a pliable membrane in the vicinity of the aperture, preferably further includes a first port associated with cement injection and a second port associated with cement over-pressurization. In an alternative embodiment, the second stabilization means includes a manually operated mechanism enabling the implant to be temporarily yet rigidly secured thereto in accordance with a desired orientation, preferably affording adjustments along multiple degrees of freedom prior to the rigid securement thereof.

A support structure implant for location within a bone cavity to support the bone which defines the cavity is formed from interlaced wires which extend from a first end of the structure towards an opposite second end. The wires are formed into loops at the first end of the structure. The structure includes a clip having a plurality of fingers which extend through the loops to control the spacing between the loops.

A tamp assembly for use in configuring bone cavity filler material within a bone cavity, in preparation for receiving an implant, includes a distal tamp portion which has a substantially constant cross-section over at least part of its length. A proximal tamp portion has a through bore extending through it with a size which is such that the proximal tamp portion is a sliding fit over the distal tamp portion. The proximal tamp portion has an exterior tamping surface extending from the through bore which faces generally towards the distal tamp portion. The assembly includes a hammer for transmitting impact to the bone cavity filler material which is contacted by the tamping surface of the proximal tamp portion.

The present invention discloses a method of hardening a bone cement under an exerted pressure in a bone cavity including preparing a cement paste; injecting said cement paste into a balloon placed in a bone cavity; and allowing the cement paste harden in the balloon. Preferably, the balloon is opened after the cement paste is set, and the opened balloon is removed from the bone cavity. The present invention also discloses a device for use in the method of the present invention.

support structure implant for location within a bone cavity to support the bone which defines the cavity is formed from wires by braiding in a machine direction from a first end of the structure towards an opposite second end. The wires are formed into loops at the first end of the structure so that two lengths of wire extend away from each loop and a reformed into the braid. Each of the wires which is formed into the braid is held at the second end of the structure in a clamp. The clamp is provided by a support ring and a clamp ring which is formed from a shape memory alloy which can shrink to clamp the wires against the support ring when heated.