Knee-joint endoprosthesis
AssigneeAesculap AG
InventorStephan Lindner
Life of this patent
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Abstract
A knee-joint endoprosthesis includes a tibia component for proximal fixation to a tibia. The tibia component has a form-fitting section arranged on an upper face. The endoprosthesis also has a meniscus component configured to articulate with a femoral joint component. The meniscus component has a complementary form-fitting section arranged on a lower face. The tibia component and the meniscus component are joined together by a form-fitting connection formed between the form-fitting section and the complementary form-fitting section. At least one reinforcement element is inserted into the meniscus component and is configured to mechanically reinforce the form-fitting joint connection. The reinforcing element is arranged in the region of the complementary form-fitting section.
Claims13
A knee-joint endoprosthesis comprising:
- a tibia component, which is configured for proximal fixation to a tibia and which has a form-fitting section arranged on an upper face;
- a meniscus component, which is configured to articulate with a femoral joint component and which has a complementary form-fitting section arranged on a lower face;
- and
- at least one reinforcement element,
- the tibia component and the meniscus component being joined together by a form-fitting connection formed between the form-fitting section and the complementary form-fitting section,
- the at least one reinforcement element being inserted into the meniscus component and configured to mechanically reinforce the form-fitting connection, the at least one reinforcement element being arranged in a region of the complementary form-fitting section, and
- the at least one reinforcement element being a cylindrical reinforcement pin that is inserted into a receiving bore of the meniscus component.
A knee-joint endoprosthesis comprising:
- a tibia component, which is configured for proximal fixation to a tibia and which has a form-fitting section arranged on an upper face;
- a meniscus component, which is configured to articulate with a femoral joint component and which has a complementary form-fitting section arranged on a lower face;
- and
- at least one reinforcement element,
- the tibia component and the meniscus component being joined together by a form-fitting connection formed between the form-fitting section and the complementary form-fitting section,
- the at least one reinforcement element being inserted into the meniscus component and configured to mechanically reinforce the form-fitting connection, the at least one reinforcement element being arranged in a region of the complementary form-fitting section, and
- the at least one reinforcement element being a cylindrical reinforcement pin that is inserted into a receiving bore of the meniscus component,
- wherein:
- the tibia component is made of a first material at least in a region of the form-fitting section,
- the meniscus component, at least in a region of the complementary form-fitting section, is made of a second material that is less mechanically stressable than the first material, and
- the at least one cylindrical reinforcement pin is made of a third material that is more mechanically stressable than the first material and/or the second material.
A knee-joint endoprosthesis comprising:
- a tibia component, which is configured for proximal fixation to a tibia and which has a form-fitting section arranged on an upper face;
- a meniscus component, which is configured to articulate with a femoral joint component and which has a complementary form-fitting section arranged on a lower face;
- and
- at least one reinforcement element,
- the tibia component and the meniscus component being joined together by a form-fitting connection formed between the form-fitting section and the complementary form-fitting section,
- the at least one reinforcement element being inserted into the meniscus component and configured to mechanically reinforce the form-fitting connection, the at least one reinforcement element being arranged in a region of the complementary form-fitting section, and
- the at least one reinforcement element being a cylindrical reinforcement pin that is inserted into a receiving bore of the meniscus component,
- wherein:
- the form-fitting section has a receiving pocket that is sunk into an upper face of the tibia component and bordered in a circumferential direction at least in sections by a boundary wall,
- the complementary form-fitting section has a receiving foot forming the lower face of the meniscus component,
- the boundary wall has an inner contour, and the receiving foot has an outer contour complementary to the inner contour, and
- the form-fitting connection has a plurality of snap-fit connections formed between the inner contour and the outer contour.
Dependencies are inferred from the claim text.