Acetabular ring prosthesis with reinforcement buttress
First Claim
1. An acetabular prosthesis for cement implantation comprising;
- a) prosthesis full or partial cup body having a cup body wall with a cup body wall thickness, the body having a concave surface on a distal side of the cup body, a convex surface on a promimal side of the cup body and an annular rim;
b) a liner that registers with the cup body, the liner having a liner wall with a liner wall thickness much greater than the cup body wall thickness and a concave surface and a convex surface that registers within the concave surface of the cup body;
c) the cup body wall having a plurality of openings therethrough;
d) some of the openings being bone screw receptive openings that are reinforced with an annular reinforcement positioned on the distal side of the cup body;
e) a cement mantle for affixing the plastic liner to the cup body;
f) the cup body having a peripheral buttress portion for supporting a portion next to the annular rim and extending distally downwardly from the concave surface, of cement of the cement mantle at a peripheral interface position in between the liner and body;
g) wherein the cement mantle flows through at least some of the openings upon assembly of the cup liner to the cup body.
6 Assignments
0 Petitions
Accused Products
Abstract
A cemented acetabular prosthesis includes a cup body having a relative thin wall (for example, 2 mm). The body has a concave surface, a convex surface, and an annular rim. A plastic liner registers into a concavity of the cup body, the liner having a wall with a liner wall thickness much greater than the cup body wall thickness and a concave surface and a convex surface that registers and fits the concave surface of the cup body. The cup body wall provides a plurality of openings. Some of the openings are bone screw receptive openings that are reinforced with an annular reinforcement that extends away from the convex surface of the cup body. Other openings are unreinforced openings that allow cement to flow from the concave to the convex side of the cup body and into the patient'"'"'s acetabulum during surgery. The cup body has a peripheral buttress portion for supporting a volume of cement of the cement mantle at a peripheral interface position between the liner and the body.
187 Citations
46 Claims
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1. An acetabular prosthesis for cement implantation comprising;
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a) prosthesis full or partial cup body having a cup body wall with a cup body wall thickness, the body having a concave surface on a distal side of the cup body, a convex surface on a promimal side of the cup body and an annular rim; b) a liner that registers with the cup body, the liner having a liner wall with a liner wall thickness much greater than the cup body wall thickness and a concave surface and a convex surface that registers within the concave surface of the cup body; c) the cup body wall having a plurality of openings therethrough; d) some of the openings being bone screw receptive openings that are reinforced with an annular reinforcement positioned on the distal side of the cup body; e) a cement mantle for affixing the plastic liner to the cup body; f) the cup body having a peripheral buttress portion for supporting a portion next to the annular rim and extending distally downwardly from the concave surface, of cement of the cement mantle at a peripheral interface position in between the liner and body; g) wherein the cement mantle flows through at least some of the openings upon assembly of the cup liner to the cup body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An acetabular prosthesis for cement implantation comprising;
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a) a thin prosthesis cup body having a wall with a thickness of between 1 and 3 mm, the body having a distal concave surface area, a central portion, a proximal convex surface, and an annular rim defining a cup periphery; b) the cup body having at least a pair of flanges that extend away from the cup central portion; c) a plastic liner that can be cemented to the concave surface area of the cup body, the liner having a wall with a thickness much greater than the thickness of the cup body and a concave surface and a convex surface that registers with the concave surface area of the cup body; d) the cup body wall having a plurality of openings therethrough; e) some of the openings being bone screw receptive openings that are reinforced with an annular reinforcement that extends away from the convex surface of the cup body; f) a cement mantle for affixing the plastic liner to the cup body; g) the cup body having a peripheral buttress extending downwardly from the distal side of the cup body for supporting a portion of cement of the cement mantle at a peripheral interface position in between the liner and body; and h) wherein the cement mantle flows through at least some of the openings upon assembly of the cup liner to the cup body.
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14. A acetabular cup prosthesis comprising:
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a) a cup member having an inner, distal concave surface and an outer, proximal convex surface; b) the cup member having an apex and a rim that extends about the periphery of the cup member, the rim having a portion that defines a rim plane; c) a curved flange portion that extends a partial distance around the cup member and away from the convex surface of the cup member, the flange portion having lower surface and an edge that falls in a flange plane that forms an angle with the rim plane; and d) a buttress mounted on the distal concave surface of the cup body and at the lower surface of the flange portion and that extends distally downwardly from the flange portion, the buttress being curved to generally follow the curved flange member. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A acetabular cup prosthesis comprising:
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a) a thin cup member having a distal side with an inner concave surface, a proximal side with an outer convex surface, and a cup wall; b) the cup member having an apex and a rim that extends about the periphery of the cup member, the rim having a portion that defines a rim plane; c) a curved flange portion that extends a partial distance around the cup member and away from the convex surface of the cup member, the flange portion having lower surface and an edge that falls in a flange plane that forms an obtuse angle with the rim plane; and d) a buttress mounted on the distal side at the lower surface of the flange portion and that extends distally downwardly from the flange portion, the buttress being curved. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A acetabular cup prosthesis comprising:
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a) a cup member having a distal side with an inner concave surface and a proximal side with an outer convex surface; b) the cup member having an apex and a rim that extends about the periphery of the cup member, the rim having a portion that defines a rim plane; c) a plurality of circumferentially spaced, radially extending flange portions that each extend a partial distance around the cup member and away from the cup rim; and d) a buttress mounted on the distal surface of the cup member, and that extends distally downwardly from the rim plane. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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Specification