Patent US6514074B1 successfully refreshed from Google Patents.
US5282865A
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Humeral shoulder prosthesis
Assignee: Howmedica Osteonics Corp
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Filing: 1992-06-22
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Granted: 1994-02-01
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Expires: 2012-06-22
Abstract
Abstract A modular humeral shoulder prosthesis for implant in a predetermined position in the natural humerus to replace the natural humeral head of a shoulder joint with a prosthetic implant has a humeral head component including a humeral head member with a spherical bearing surface of predetermined radius extending from an origin to the bearing surface, an undersurface extending in a first direction, an elongate post integral with and projecting in a given direction from the humeral head member, the given direction making a first acute angle with the first direction, and a post portion on the post, and a humeral stem component including a platform having an upper surface, a stem integral with and depending from the platform, the stem extending along a longitudinal axis for alignment generally longitudinally along the natural humerus, the upper surface extending in a second direction making a second acute angle with the longitudinal axis, and an elongate recess in the stem, the recess extending along the stem and including at least a recess portion complementary to the post portion for reception of the post portion within the recess portion in an integrated coupled assembly wherein the humeral head component is affixed to the humeral stem component with the undersurface of the humeral head member confronting the upper surface of the platform when the bearing surface is in the predetermined position to replace the natural humeral head.
Inventors
- 👤 Nicholas N. G. Dong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:24
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30771; A61F2/40; A61F2002/30001; A61F2002/30316; A61F2002/30535; A61F2002/30574; A61F2002/30604; A61F2002/3082; A61F2002/30836; A61F2002/30878; A61F2002/30884; A61F2002/30899; A61F2002/30902; A61F2/4014; A61F2002/4051; A61F2/4059; A61F2002/4062; A61F2002/4077; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00029
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
276 words
A modular humeral shoulder prosthesis for implant in a predetermined position in the natural humerus to replace the natural humeral head of a shoulder joint with a prosthetic implant, the humeral shoulder prosthesis comprising: a humeral head component including a humeral head member having a spherical bearing surface with a predetermined radius extending from an origin to the bearing surface, an undersurface extending in a first direction and including a central location, an elongate post integral with and projecting in a given direction from the humeral head member, the given direction making a first acute angle with the first direction, the post extending along an axis which intersects the undersurface at a further location spaced laterally away from the central location, the post being integral with the humeral head member at said further location, and a post portion on the post; and a humeral stem component including a platform having an upper surface, a stem integral with and depending from the platform, the stem extending along a longitudinal axis for alignment generally longitudinally along the natural humerus, the upper surface extending in a second direction making a second acute angle with the longitudinal axis, and an elongate recess in the stem, the recess extending along the stem and including at least a recess portion complementary to the post portion for reception of the post portion within the recess portion in an integrated coupled assembly wherein the humeral head component is affixed to the humeral stem component with the undersurface of the humeral head member confronting the upper surface of the platform when the bearing surface is in the predetermined position to replace the natural humeral head.
Claim 2
Dependent Claim
276 words
A modular humeral shoulder prosthesis for implant in a predetermined position in the natural humerus to replace the natural humeral head of a shoulder joint with a prosthetic implant, the humeral shoulder prosthesis comprising: a humeral head component including a humeral head member having a spherical bearing surface with a predetermined radius extending from an origin to the bearing surface, an undersurface extending in a first direction and including a central location, an elongate post integral with and projecting in a given direction from the humeral head member, the given direction making a first acute angle with the first direction, the post extending along an axis which intersects the undersurface at a further location spaced laterally away from the central location, the post being integral with the humeral head member at said further location, and a post portion on the post; and a humeral stem component including a platform having an upper surface, a stem integral with and depending from the platform, the stem extending along a longitudinal axis for alignment generally longitudinally along the natural humerus, the upper surface extending in a second direction making a second acute angle with the longitudinal axis, and an elongate recess in the stem, the recess extending along the stem and including at least a recess portion complementary to the post portion for reception of the post portion within the recess portion in an integrated coupled assembly wherein the humeral head component is affixed to the humeral stem component with the undersurface of the humeral head member confronting the upper surface of the platform when the bearing surface is in the predetermined position to replace the natural humeral head.
Claim 3
Dependent Claim
56 words
The invention of claim 1 wherein the humeral head member is in the form of a generally spherical segment having a basal surface lying essentially in a chordal plane, the chordal plane being spaced radially away from the origin of the radius of the bearing surface, and the first direction lies essentially in the chordal plane.
Claim 4
Dependent Claim
19 words
The invention of claim 2 wherein the first acute angle and the second acute angle are essentially the same.
Claim 5
Dependent Claim
20 words
The invention of claim 3 wherein the first acute angle and the second acute angle each are about forty degrees.
Claim 6
Dependent Claim
23 words
The invention of claim 1 wherein the undersurface includes a central location and the post is spaced laterally away from the central location.
Claim 7
Dependent Claim
19 words
The invention of claim 1 wherein the origin of the radius of the bearing surface lies within the post.
Claim 8
Dependent Claim
31 words
The invention of claim 6 wherein the post includes a central axis and the origin of the radius of the bearing surface lies essentially on the central axis of the post.
Claim 9
Dependent Claim
40 words
The invention of claim 1 wherein the stem includes a proximal end, a distal end, and an outer surface, and at least one longitudinally extending channel in the outer surface of the stem adjacent the distal end of the stem.
Claim 10
Dependent Claim
58 words
The invention of claim 1 wherein the stem includes a proximal end, a distal end, and a laterally outer surface, and flanges extending outwardly from the laterally outer surface of the stem adjacent the proximal end of the stem, the flanges extending in a generally V-shaped array oriented such that each flange extends between anterior-posterior and medial-lateral directions.
Claim 11
Dependent Claim
35 words
The invention of claim 1 wherein the undersurface of the humeral head member of the humeral head component includes a basal surface for confronting the upper surface of the platform of the humeral stem component.
Claim 12
Dependent Claim
27 words
The invention of claim 10 wherein the undersurface has an outer periphery, and the basal surface extends along the undersurface adjacent the outer periphery of the undersurface.
Claim 13
Dependent Claim
264 words
A modular humeral shoulder prosthesis for implant in a predetermined position in the natural humerus to replace the natural humeral head of a shoulder joint with a prosthetic implant, the humeral shoulder prosthesis comprising: a humeral head component including a humeral head member having a spherical bearing surface with a predetermined radius extending from an origin to the bearing surface, an undersurface extending in a first direction, an elongate post integral with and projecting in a given direction from the humeral head member, the given direction making a first acute angle with the first direction, the post including a central axis, the origin of the radius of the bearing surface lying within the post, essentially on the central axis of the post, and a post portion on the post; and a humeral stem component including a platform having an upper surface, a stem integral with and depending from the platform, the stem extending along a longitudinal axis for alignment generally longitudinally along the natural humerus, the upper surface extending in a second direction making a second acute angle with the longitudinal axis, and an elongate recess in the stem, the recess extending along the stem and including at least a recess portion complementary to the post portion for reception of the post portion within the recess portion in an integrated coupled assembly wherein the humeral head component is affixed to the humeral stem component with the undersurface of the humeral head member confronting the upper surface of the platform when the bearing surface is in the predetermined position to replace the natural humeral head.
Claim 14
Dependent Claim
264 words
A modular humeral shoulder prosthesis for implant in a predetermined position in the natural humerus to replace the natural humeral head of a shoulder joint with a prosthetic implant, the humeral shoulder prosthesis comprising: a humeral head component including a humeral head member having a spherical bearing surface with a predetermined radius extending from an origin to the bearing surface, an undersurface extending in a first direction, an elongate post integral with and projecting in a given direction from the humeral head member, the given direction making a first acute angle with the first direction, the post including a central axis, the origin of the radius of the bearing surface lying within the post, essentially on the central axis of the post, and a post portion on the post; and a humeral stem component including a platform having an upper surface, a stem integral with and depending from the platform, the stem extending along a longitudinal axis for alignment generally longitudinally along the natural humerus, the upper surface extending in a second direction making a second acute angle with the longitudinal axis, and an elongate recess in the stem, the recess extending along the stem and including at least a recess portion complementary to the post portion for reception of the post portion within the recess portion in an integrated coupled assembly wherein the humeral head component is affixed to the humeral stem component with the undersurface of the humeral head member confronting the upper surface of the platform when the bearing surface is in the predetermined position to replace the natural humeral head.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-01-31 | 1997-08-02 | 1998-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-31 | 2001-08-02 | 2002-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-31 | 2005-08-02 | 2006-02-01 | $7700.00 | Window Closed / Lapsed |