US5658352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hip prosthesis and its use
Assignee: THURGAUER KANTONALBANK A Corp CHARTERED IN AND EXISTING UNDER LAWS OF SWITZERLAND THAT MAINTAINS ITS PRINCIPAL OFFICES AT
•
Filing: 1996-02-01
•
Granted: 1997-08-19
•
Expires: 2016-02-01
Abstract
Abstract The invention relates to a hip joint prosthesis and its use in hip joint surgery. Essentially, the construction of the prosthesis is a laterally open hollow body whose cross-section (31) is horseshoe-shaped. This allows ideal adaption to the lines of load transfer. It is preferable for the prosthesis to comprise a laterally open hollow body as the stem (3), a more solid neck portion (2) and a head (1), which can be multidimensionally adjusted on the neck portion. The prosthesis can also be a complete implant with the construction of a straight-stemmed prosthesis having S-shaped mass distribution. (FIG. 1).
Inventors
- 👤 Klaus Draenert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:42
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/8802; A61B17/8805; A61B17/8808; A61F2/3609; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30131; A61F2002/30133; A61F2002/30316; A61F2002/30317; A61F2002/30324; A61F2002/30329; A61F2002/30383; A61F2002/30387; A61F2002/3039; A61F2002/30398; A61F2002/30451; A61F2002/30535; A61F2002/30537; A61F2002/30553; A61F2002/30555; A61F2002/30593; A61F2002/30604; A61F2002/3652; A61F2/3662; A61F2002/3678; A61F2002/3686; A61F2002/3688; A61F2220/00; A61F2220/0025; A61F2220/0058; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0013; A61F2230/0015; A61F2250/00; A61F2250/0004; A61F2250/0008; A61F2250/0014; A61F2250/0036
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
102 words
A hip joint prosthesis comprising an elongated stem, a neck and a head, said prosthesis extending between a proximal end and a distal end and having a lateral side, a medial side, a ventral side and a dorsal side, said stem being configured to be implanted in a medullary cavity of a femur, said stem being hollow over at least a substantial fraction of the length of the stem, said hollow stem having a horseshoe-shaped cross-section with a medial wall portion, a dorsal wall portion and a ventral wall portion, wherein the cross-section is open at said lateral side of said prosthesis.
Claim 2
Dependent Claim
102 words
A hip joint prosthesis comprising an elongated stem, a neck and a head, said prosthesis extending between a proximal end and a distal end and having a lateral side, a medial side, a ventral side and a dorsal side, said stem being configured to be implanted in a medullary cavity of a femur, said stem being hollow over at least a substantial fraction of the length of the stem, said hollow stem having a horseshoe-shaped cross-section with a medial wall portion, a dorsal wall portion and a ventral wall portion, wherein the cross-section is open at said lateral side of said prosthesis.
Claim 3
Dependent Claim
22 words
The prosthesis according to claim 1, wherein said ventral portion of the cross-section of the prosthesis is shorter than said dorsal portion.
Claim 4
Dependent Claim
66 words
The prosthesis according to claim 1, wherein the medial wall portion, the dorsal wall portion and the ventral wall portion of the hollow stem each have a medium wall thickness, and wherein, at least in a proximal section of the prosthesis, the dorsal wall portion and the medial wall portion of the hollow body have an enlarged thickness with respect to their respective medium wall thickness.
Claim 5
Dependent Claim
27 words
The prosthesis according to claim 1, wherein the wall thickness of the hollow body decreases from a proximal section to a distal section of said stem portion.
Claim 6
Dependent Claim
42 words
The prosthesis according to claim 1, wherein the prosthesis has a mass largely concentrated in a proximal end of the prosthesis and wherein the shape of the prosthesis is such that a centre of gravity of the mass lies outside the prosthesis.
Claim 7
Dependent Claim
22 words
The prosthesis according to claim 1, wherein the the cross-section has a mass centre of gravity which lies within the medial portion.
Claim 8
Dependent Claim
21 words
The prosthesis according to claim 1, wherein the stiffness of the prosthesis decreases from a proximal portion to a distal portion.
Claim 9
Dependent Claim
33 words
The prosthesis according to claim 1, wherein the stem defines a longitudinal axis, and wherein, at least in a proximal portion, a cross-section taken parallel to the longitudinal axis, comprises a concave arch.
Claim 10
Dependent Claim
30 words
The prosthesis according to claim 1, wherein said prosthesis is of modular construction and comprises an axial support and a plurality of components adapted for attachment to the axial support.
Claim 11
Dependent Claim
30 words
The prosthesis according to claim 9, wherein said prosthesis comprises a guide attached relative to the stem, the guide allowing the head to be detachably mounted relative to the stem.
Claim 12
Dependent Claim
31 words
A hip joint prosthesis according to claim 1 further comprising means for adjusting positional location of said head of the prosthesis with respect to the stem in at least one dimension.
Claim 13
Dependent Claim
22 words
The prosthesis according to claim 11, wherein positional location of said head portion of the prosthesis is adjustable in a frontal plane.
Claim 14
Dependent Claim
22 words
The prosthesis according to claim 11, wherein positional location of said head portion of the prosthesis is adjustable in a sagittal plane.
Claim 15
Dependent Claim
26 words
The prosthesis according to claim 11, wherein positional location of said head portion of the prosthesis is adjustable in a frontal plane and a sagittal plane.
Claim 16
Dependent Claim
22 words
The prosthesis according to claim 11, wherein positional location of said head portion of the prosthesis is adjustable in a vertical plane.
Claim 17
Dependent Claim
29 words
The prosthesis according to claim 11, wherein positional location of said head portion of the prosthesis is adjustable in a frontal plane, a sagittal plane and a vertical plane.
Claim 18
Dependent Claim
41 words
The prosthesis according to claim 11, wherein positional location of said head portion of the prosthesis is adjustable in a frontal plane and in a sagittal plane and in a vertical plane and in any combination thereof independently from each other.
References Cited (Backward Citations)
US3893196A
Cited
US4287617A
Cited
US4435854A
Cited
US4608053A
Cited
US4536898A
Cited
US4589883A
Cited
US4676797A
Cited
EP0201407B1
Cited
US4822370A
Cited
EP0257222A1
Cited
EP0257359A1
Cited
DE8705921U1
Cited
US4808186A
Cited
WO1990002533A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-18 | 2001-02-17 | 2001-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-18 | 2005-02-17 | 2005-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-18 | 2009-02-17 | 2009-08-19 | $7700.00 | Window Closed / Lapsed |