Joint prothesis
First Claim
Patent Images
1. A joint prosthesis, comprising:
- a shaft part insertable into a tubular bone and having a first longitudinal axis;
a head part adjoining the shaft part and including a sleeve region which has a through bore that has a second longitudinal axis which forms an obtuse angle with the first longitudinal axis; and
a joint connection element having a shaft for being received in the through bore of the head part, the through bore of the head part being adapted to a cross section of the shaft of the joint connection element, the joint connection element having a third longitudinal axis forming essentially the same obtuse angle with the first longitudinal axis that the second longitudinal axis makes with the first longitudinal axis when the joint connection element is introduced in the through bore, the shaft of the joint connection element including a cylindrical region that is expandable by a spreader device to lock the joint connection element in place in the through bore of the head part.
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Abstract
A joint prosthesis includes a shaft part insertable into a tubular bone and a head part joining the shaft part and including a joint connection element. The head part includes a sleeve region having a through bore adapted to a cross section of a shaft of the joint connection element. The longitudinal axis of the shaft part and the joint connection element form an obtuse angle when the joint connection element is introduced into the through bore of the head part.
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Citations
28 Claims
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1. A joint prosthesis, comprising:
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a shaft part insertable into a tubular bone and having a first longitudinal axis; a head part adjoining the shaft part and including a sleeve region which has a through bore that has a second longitudinal axis which forms an obtuse angle with the first longitudinal axis; and a joint connection element having a shaft for being received in the through bore of the head part, the through bore of the head part being adapted to a cross section of the shaft of the joint connection element, the joint connection element having a third longitudinal axis forming essentially the same obtuse angle with the first longitudinal axis that the second longitudinal axis makes with the first longitudinal axis when the joint connection element is introduced in the through bore, the shaft of the joint connection element including a cylindrical region that is expandable by a spreader device to lock the joint connection element in place in the through bore of the head part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A joint prosthesis, comprising:
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a shaft part insertable into a tubular bone and having a first longitudinal axis; a head part adjoining the shaft part, the head part including an axial bore extending in the direction of the first longitudinal axis and a sleeve region which has a through bore that has a second longitudinal axis which forms an obtuse angle with the first longitudinal axis; and a joint connection element having a shaft for being received in the through bore of the head part, the through bore of the head part being adapted to a cross section of the shaft of the joint connection element, the joint connection element having a third longitudinal axis forming essentially the same obtuse angle with the first longitudinal axis that the second longitudinal axis makes with the first longitudinal axis when the joint connection element is introduced in the through bore, wherein the joint connection element has a through bore that constitutes a continuation of the axial bore of the head part when the joint connection element is longitudinally supported in the head part. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A joint prosthesis, comprising:
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a shaft part insertable into a tubular bone and having an axial bore and a first longitudinal axis; a head part adjoining the shaft part, the head part including an axial bore extending in the direction of the first longitudinal axis and a sleeve region which has a through bore that has a second longitudinal axis which forms an obtuse angle with the first longitudinal axis; and a joint connection element having a shaft for being received in the through bore of the head part, the through bore of the head part being adapted to a cross section of the shaft of the joint connection element, the joint connection element having a third longitudinal axis forming essentially the same obtuse angle with the first longitudinal axis that the second longitudinal axis makes with the first longitudinal axis when the joint connection element is introduced in the through bore; wherein the axial bore of the shaft part has a proximal region adjacent the head part with a first diameter and a thread provided only in the proximal region, and the axial bore of the head part has a thread and a second diameter that is greater than the first diameter of the bore of the shaft part for loosening the head part and shaft part relative to one another when a screw is received in the axial bore of the head part. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification