Prosthetic implant and surgical tool
AssigneeFinsbury (Development) Limited
InventorsMichael Antony Tuke, Robert Michael Wozencroft, Robert Stephen Parsons
Life of this patent
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Abstract
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.
Claims46
A prosthetic implant comprising a main body portion, having a first surface for presentation to a receptive bone surface and a second surface for receipt of an articulating joint, and filamentary member attachment means adapted for attachment of a filamentary member to the implant.
A prosthetic implant comprising a main body portion, having a first surface for presentation to a surgically prepared bone cavity of a patient and a second surface for receipt of an articulating joint, and filamentary member attachment means adapted for attachment of a filamentary member to the implant.
An acetabular hip prosthesis for implantation in a surgically prepared socket in a hip of a patient comprising:
- a generally cup-shaped body having:
- an outer generally convex surface for contact with bone of a surgically prepared socket in a hip of a patient;
- an inner generally concave surface;
- a peripheral bridge portion whose surface extends between the outer generally convex surface and the inner generally concave surface;
- and
- at least one bore which extends from a first opening in the surface of the bridge portion through an interior portion of the substantially cup-shaped body to a second opening in the surface of the bridge portion, the bore being adapted for receipt of a filamentary member therethrough for holding the prosthesis on the end of an insertion tool to facilitate insertion of the prosthesis into the prepared socket.
An acetabular hip prosthesis for implantation in a surgically prepared socket in a hip of a patient comprising:
- a generally cup-shaped body having:
- an outer generally convex surface for contact with bone of a surgically prepared socket in a hip of a patient;
- an inner generally concave surface;
- a peripheral bridge portion whose surface extends between the outer generally convex surface and the inner generally concave surface;
- and
- a plurality of bores each of which extends from a first opening in the surface of the bridge portion through an interior portion of the substantially cup-shaped body to a second opening in the surface of the bridge portion, the bore being adapted for receipt of a filamentary member therethrough for holding the prosthesis on the end of an insertion tool to facilitate insertion of the prosthesis into the prepared socket.
A protected prosthetic implant comprising a main body portion, having a first surface for presentation to a receptive bone surface and a second surface for receipt of an articulating joint, filamentary member attachment means adapted for attachment of a filamentary member to the implant, and a protective cap for covering at least part of the second surface of the main body portion of the implant.
A protected acetabular hip prosthesis for implantation in a surgically prepared socket in a hip of a patient comprising:
- (i) a generally cup-shaped metal body having:
- an outer generally convex surface for contact with bone of a surgically prepared socket in a hip of a patient;
- an inner substantially part spherical cavity in the metal body, the cavity having a generally concave polished surface for receipt of a ball head on a femoral prosthesis and a periphery surrounding the cavity and defining a mouth;
- a peripheral bridge portion whose surface extends between the periphery of the cavity and the outer generally convex surface;
- and
- at least one bore which extends from a first opening in the surface of the peripheral bridge portion through an interior portion of the substantially part spherical body to a second opening in the surface of the bridge portion, the at least one bore being adapted for receipt of a filamentary member therethrough for holding the prosthesis on the end of an insertion tool to facilitate insertion of the prosthesis into the surgically prepared socket;
- (ii) a cover member adapted to bridge the cavity, the cover having apertures therethrough which correspond to the first and second openings in the metal body and are adapted for passage of the filamentary member;
- and
- (iii) a filamentary member threaded through the at least one hole in the metal body and through the apertures in the cover member, the free ends of the filamentary member being secured one to another to form a closed loop of filamentary member which secures the cover to the metal body.
A protected acetabular hip prosthesis for implantation in a surgically prepared socket in a hip of a patient comprising:
- (i) a generally cup-shaped metal body having:
- an outer generally convex surface for contact with bone of a surgically prepared socket in a hip of a patient;
- an inner substantially part spherical cavity in the metal body, the cavity having a generally concave polished surface for receipt of a ball head on a femoral prosthesis and a periphery surrounding the cavity and defining a mouth;
- a peripheral bridge portion whose surface extends between the periphery of the cavity and the outer generally convex surface;
- and
- a plurality of bores each of which extends from a first opening in the surface of the peripheral bridge portion through an interior portion of the substantially part spherical body to a second opening in the surface of the bridge portion, the bores being adapted for receipt of a filamentary member therethrough for holding the prosthesis on the end of an insertion tool to facilitate insertion of the prosthesis into the surgically prepared socket;
- (ii) a cover member adapted to bridge the cavity, the cover having apertures therethrough which correspond to the first and second openings in the metal body and are adapted for passage of the filamentary member;
- and
- (iii) a filamentary member threaded through each of the plurality of holes in the metal body and through the apertures in the cover member, the free ends of the filamentary member being secured one to another to form a closed loop of filamentary member which secures the cover to the metal body.
A protected acetabular hip prosthesis for implantation in a surgically prepared socket in a hip of a patient comprising:
- (i) a generally cup-shaped metal body having:
- an outer generally convex surface for contact with bone of a surgically prepared socket in a hip of a patient;
- a cavity in the metal body for receipt of a liner of plastics material, the cavity having a periphery surrounding the cavity and defining a mouth;
- a peripheral bridge portion whose surface extends between the periphery of the cavity and the outer generally convex surface;
- and
- a plurality of bores each of which extends from a first opening in the surface of the peripheral bridge portion through an interior portion of the substantially part spherical body to a second opening in the surface of the bridge portion, the bores being adapted for receipt of a filamentary member therethrough for holding the prosthesis on the end of an insertion tool to facilitate insertion of the prosthesis into the surgically prepared socket;
- (ii) a liner of plastics material secured in the cavity of the cup shaped metal body, the liner having an outer surface adapted to conform to the inner surface of the cavity in the cup-shaped metal body and a substantially part spherical inner surface for receipt of a ball head on a femoral hip prosthesis;
- (iii) a cover member having a first face adapted to bridge the cavity, the cover member having apertures therethrough which correspond to the first and second openings in the metal body and are adapted for passage of the filamentary member;
- and
- (iv) a filamentary member threaded through each of the plurality of holes in the metal body and through the apertures in the cover member, the free ends of the filamentary member being secured one to another to form a closed loop of filamentary member which secures the cover to the metal body.
A surgical tool for gripping a protected acetabular hip prosthesis for implantation in a surgically prepared socket in a hip of a patient, the protected acetabular hip prosthesis comprising a generally cup-shaped metal body which has an outer generally convex surface and a cavity defining a mouth, a protective cap over the mouth of the cavity, and a closed loop of filamentary member secured to the acetabular hip prosthesis, the tool comprising an elongate body having a first end for engagement with the protective cap and adjustable filamentary member engagement means for engagement with and tightening of the closed loop of filamentary member so as to locate the protective cap against the first end of the tool and to draw the acetabular hip prosthesis towards the first end surface thereby to hold the prosthetic implant securely on the first end of the tool during surgical implantation of the acetabular hip prosthesis, the tool and protective cap being removable after such surgical implantation by loosening the tension in the closed loop of filamentary member and then severing the closed loop of filamentary member to allow it to be disengaged from the implanted acetabular hip prosthesis.
Dependencies are inferred from the claim text.