Orthopaedic implant systems with anti-abrasion studs
First Claim
1. An orthopaedic implant system for use in treating an orthopaedic disorder of a patello-femoral joint between the femur and the tibia and a tibio-femoral joint between the femur and the patella, the femur including native articular cartilage, the implant system comprising:
- a trochlear implant component sized and shaped to replace a portion of the femur without covering the distal surfaces of the medial and lateral condyles, the trochlear component having a bearing surface and a bone-facing surface;
a uni-condylar implant component sized and shaped to replace a portion of one of the condyles of the distal femur, the uni-condylar implant component having a bearing surface and a bone-facing surface;
a patellar implant component sized and shaped to replace a portion of the patella, the patellar implant component having a bearing surface and a bone-facing surface;
an implantable stud including a head having a bearing surface and a bone-facing surface, the implantable stud further including a fixation post extending outward from the bone-facing surface of the head, the head of the stud being sized and shaped to fit between a portion of the trochlear component and a portion of the uni-condylar implant component without contacting either the trochlear component or the uni-condylar implant component when all three components are implanted on the distal femur;
wherein the bearing surface of the head has a different shape than the bearing surfaces of the trochlear implant component and the uni-condylar implant component; and
wherein the bearing surface of the head is sized and shaped to limit contact between the patellar implant component and native tissue during flexion and extension of the knee joint.
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Accused Products
Abstract
An orthopaedic implant system includes a trochlear, patellar, a uni-condylar implant component, and an anti-abrasion stud. The anti-abrasion stud has a head with a bearing surface, a bone-facing surface and a fixation post extending outward from the bone-facing surface of the head. The bearing surface of the stud is sized and shaped so that it can be implanted to supplement or extend the bearing surfaces of the other implant components to protect native articular cartilage from abrasion from the patellar component.
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Citations
48 Claims
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1. An orthopaedic implant system for use in treating an orthopaedic disorder of a patello-femoral joint between the femur and the tibia and a tibio-femoral joint between the femur and the patella, the femur including native articular cartilage, the implant system comprising:
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a trochlear implant component sized and shaped to replace a portion of the femur without covering the distal surfaces of the medial and lateral condyles, the trochlear component having a bearing surface and a bone-facing surface;
a uni-condylar implant component sized and shaped to replace a portion of one of the condyles of the distal femur, the uni-condylar implant component having a bearing surface and a bone-facing surface;
a patellar implant component sized and shaped to replace a portion of the patella, the patellar implant component having a bearing surface and a bone-facing surface;
an implantable stud including a head having a bearing surface and a bone-facing surface, the implantable stud further including a fixation post extending outward from the bone-facing surface of the head, the head of the stud being sized and shaped to fit between a portion of the trochlear component and a portion of the uni-condylar implant component without contacting either the trochlear component or the uni-condylar implant component when all three components are implanted on the distal femur;
wherein the bearing surface of the head has a different shape than the bearing surfaces of the trochlear implant component and the uni-condylar implant component; and
wherein the bearing surface of the head is sized and shaped to limit contact between the patellar implant component and native tissue during flexion and extension of the knee joint. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An orthopaedic implant system comprising:
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a trochlear implant component sized and shaped to replace a portion of the femur between the medial and lateral condyles without covering the distal surfaces of the medial and lateral condyles, the trochlear component having a bearing surface and a bone-facing surface;
a patellar implant component sized and shaped to replace a portion of the patella, the patellar implant component having a bearing surface and a bone-facing surface;
a uni-condylar implant component sized and shaped to replace a portion of one of the condyles of the distal femur, the uni-condylar implant component having a bearing surface and a bone-facing surface; and
a first implantable stud having a head with a bearing surface, a bone-facing surface and a fixation post extending outward from the bone-facing surface of the head;
a second implantable stud having a head with a bearing surface, a bone-facing surface and a fixation post extending outward from the bone-facing surface of the head;
wherein the bearing surface of the first implantable stud differs from the bearing surface of the second implantable stud in at least one of the characteristics of size and shape;
wherein the heads of the first and second implantable studs have maximum transverse dimensions in the range of 10-40 mm and thicknesses in the range of 2-6 mm;
and wherein the bearing surfaces of first and second implantable studs have shapes that are different from the shapes of the bearing surfaces of the trochlear implant component and the uni-condylar implant component. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An orthopaedic implant system comprising:
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a trochlear component sized and shaped to replace a portion of the femur between the medial and lateral condyles without covering the distal surfaces of the medial and lateral condyles, the trochlear component having a bearing surface and a bone-facing surface; and
an implantable stud having a head with a bearing surface and a bone-facing surface and a fixation post extending outward from the bone-facing surface of the head;
wherein the implantable stud is made of a non-bioresorbable material and is implantable independent of the trochlear component;
wherein the area of the bearing surface of the head of the stud is less than 900 mm2; and
wherein the bearing surface of the head of the implantable stud is convex and substantially smooth. - View Dependent Claims (34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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36. The orthopaedic implant system of claim 36 wherein the area of the bearing surface of the head of the stud is less than 100 mm2.
Specification