US5549697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hip joint prostheses and methods for manufacturing the same
Assignee: Johnson and Johnson Professional Inc
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Filing: 1994-09-22
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Granted: 1996-08-27
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Expires: 2014-09-22
Abstract
Abstract An implantable bone prosthesis, such as an acetabular shell, includes a bone engaging region that is made from a cast metal or metal alloy and an articulation surface that is formed of a ceramic material or a metal that is permanently attached to the metal bone engaging region. The bone engaging region of the prosthesis preferably includes a dampening mechanism to absorb some of the loading forces communicated to the acetabular cavity. The bone prosthesis is formed by a casting process from casting molds that are prepared using a three dimensional printing technique.
Inventors
- 👤 Salvatore Caldarise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:56
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/34; A61F2/30767; A61F2/30771; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61F2/3094; A61F2/36; A61F2/3662; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30014; A61F2002/30316; A61F2002/30317; A61F2002/30324; A61F2002/30535; A61F2002/30563; A61F2002/30565; A61F2002/30571; A61F2002/30593; A61F2002/30594; A61F2002/30667; A61F2002/30682; A61F2002/30685; A61F2002/30795; A61F2002/30803; A61F2/30942; A61F2002/30957; A61F2002/30971; A61F2002/30973; A61F2002/3401; A61F2/3609; A61F2002/3611; A61F2002/3625; A61F2250/00; A61F2250/0014; A61F2250/0018; A61F2250/0036; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00029; A61F2310/00179; A61F2310/00185; A61F2310/00203; A61F2310/00215; A61F2310/00239; A61F2310/00269; A61F2310/00281; A61F2310/00299; A61F2310/00317; B; B33; B33Y; B33Y10/00; B33Y80/00; Y; Y10; Y10S; Y10S623/00; Y10S623/901
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
135 words
An implantable bone prosthesis in the form of a substantially hemispherical cup for attachment within the acetabulum cavity of the pelvis, the prosthesis comprising: an external portion for mounting within the acetabulum cavity including a metallic dome-like structure having a textured, irregular bone-contacting surface, the bone-contacting surface further including a discontinuous portion forming a substantially hemispherical dampening structure for absorbing loading forces communicated to the acetabular cavity and a mounting surface having a substantially cup-like shape; and an internal portion for receiving a femoral had of a femur having a substantially cup-like shape and being formed of a biologically compatible ceramic or metallic material, the internal portion having a first surface that is permanently affixed to the mounting surface of the external portion and a second, substantially smooth articulation surface for seating the femoral head.
Claim 2
Dependent Claim
135 words
An implantable bone prosthesis in the form of a substantially hemispherical cup for attachment within the acetabulum cavity of the pelvis, the prosthesis comprising: an external portion for mounting within the acetabulum cavity including a metallic dome-like structure having a textured, irregular bone-contacting surface, the bone-contacting surface further including a discontinuous portion forming a substantially hemispherical dampening structure for absorbing loading forces communicated to the acetabular cavity and a mounting surface having a substantially cup-like shape; and an internal portion for receiving a femoral had of a femur having a substantially cup-like shape and being formed of a biologically compatible ceramic or metallic material, the internal portion having a first surface that is permanently affixed to the mounting surface of the external portion and a second, substantially smooth articulation surface for seating the femoral head.
Claim 3
Dependent Claim
23 words
The prosthesis of claim 1 wherein the discontinuous bone-contacting portion forming the dampening structure is formed of one or more leaf spring members.
Claim 4
Dependent Claim
33 words
The prosthesis of claim 1 wherein the internal portion is formed of a biologically compatible ceramic material selected from the group consisting of alumina, silica, silicon carbide, silicon nitride, zirconia, and mixtures thereof.
Claim 5
Dependent Claim
30 words
The prosthesis of claim 1 wherein the external portion is formed of a biologically compatible metallic material selected from the group consisting of cobalt-chromium alloy, titanium-vanadium alloy, and stainless steel.
Claim 6
Dependent Claim
93 words
An implantable bone prosthesis in the form of a substantially hemispherical cup for attachment to the acetabulum cavity of the pelvis, the prosthesis comprising: a metallic dome-like structure for mounting within the acetabulum cavity including a textured, irregular bone-contacting surface and a substantially smooth articulation surface having a substantially cup-like shape for seating a femoral head of a femur; and a substantially hemispherical dampening structure for absorbing loading forces communicated to the acetabulum cavity, the dampening structure being formed by one or more discontinuities in the bone-contacting surface of the metallic dome-like structure.
Claim 7
Dependent Claim
93 words
An implantable bone prosthesis in the form of a substantially hemispherical cup for attachment to the acetabulum cavity of the pelvis, the prosthesis comprising: a metallic dome-like structure for mounting within the acetabulum cavity including a textured, irregular bone-contacting surface and a substantially smooth articulation surface having a substantially cup-like shape for seating a femoral head of a femur; and a substantially hemispherical dampening structure for absorbing loading forces communicated to the acetabulum cavity, the dampening structure being formed by one or more discontinuities in the bone-contacting surface of the metallic dome-like structure.
Claim 8
Dependent Claim
19 words
The prosthesis of claim 5 wherein the discontinuities in the bone-contacting surface comprise one or more leaf spring structures.
Claim 9
Dependent Claim
180 words
An implantable artificial hip joint comprising: a femoral component having an elongated shaft with a neck at a proximal end thereof; a hemispherical femoral head having a smooth outer articulation surface adapted to seat within an acetabular shell and a second surface adapted to be secured to the neck of the femoral component; and an acetabular cup for attachment to the acetabulum cavity of the pelvis, including (i) an external portion for mounting within the acetabulum cavity, the internal portion including a metallic dome-like structure having a textured, irregular bone-contacting surface and a mounting surface having a substantially cup-like shape, the bone-contacting surface further including a discontinuous portion forming a substantially hemispherical dampening structure for absorbing loading forces communicated to the acetabulum cavity; and (ii) an internal portion for receiving a femoral head of a femur having substantially cup-like shape and being formed of a biologically compatible ceramic material, the internal portion having a first surface that is permanently affixed to the mounting surface of the external portion and a second, substantially smooth bearing surface for seating the femoral head.
Claim 10
Dependent Claim
180 words
An implantable artificial hip joint comprising: a femoral component having an elongated shaft with a neck at a proximal end thereof; a hemispherical femoral head having a smooth outer articulation surface adapted to seat within an acetabular shell and a second surface adapted to be secured to the neck of the femoral component; and an acetabular cup for attachment to the acetabulum cavity of the pelvis, including (i) an external portion for mounting within the acetabulum cavity, the internal portion including a metallic dome-like structure having a textured, irregular bone-contacting surface and a mounting surface having a substantially cup-like shape, the bone-contacting surface further including a discontinuous portion forming a substantially hemispherical dampening structure for absorbing loading forces communicated to the acetabulum cavity; and (ii) an internal portion for receiving a femoral head of a femur having substantially cup-like shape and being formed of a biologically compatible ceramic material, the internal portion having a first surface that is permanently affixed to the mounting surface of the external portion and a second, substantially smooth bearing surface for seating the femoral head.
Claim 11
Dependent Claim
26 words
The joint of claim 7 wherein the discontinuous portion of the bone-contacting surface forming the dampening structure is formed of one or more leaf spring structures.
Claim 12
Dependent Claim
31 words
The joint of claim 7 wherein the internal portion is composed of a ceramic material selected from the group consisting of alumina, silica, silicon dioxide, silicon nitride, zirconia, and mixtures thereof.
Claim 13
Dependent Claim
30 words
The joint of claim 7 wherein the external portion is formed of a biologically compatible metallic material selected from the group consisting of cobalt-chromium alloy, titanium-vanadium alloy, and stainless steel.
Claim 14
Dependent Claim
94 words
An implantable bone prosthesis, comprising a substantially hemispherical cup-like structure for attachment within the acetabulum cavity of the pelvis, the hemispherical cup-like structure including a dome-like external, bone engaging surface and an opposed internal concave surface; a dampening structure formed in the dome-like external, bone engaging surface for absorbing loading forces communicated to the acetabulum cavity, the dampening structure being in the form of one or more discontinuities formed in the dome-like portion of the bone engaging surface; and a polymeric liner material joined to the internal concave surface of the hemispherical cup-like structure.
Claim 15
Dependent Claim
94 words
An implantable bone prosthesis, comprising a substantially hemispherical cup-like structure for attachment within the acetabulum cavity of the pelvis, the hemispherical cup-like structure including a dome-like external, bone engaging surface and an opposed internal concave surface; a dampening structure formed in the dome-like external, bone engaging surface for absorbing loading forces communicated to the acetabulum cavity, the dampening structure being in the form of one or more discontinuities formed in the dome-like portion of the bone engaging surface; and a polymeric liner material joined to the internal concave surface of the hemispherical cup-like structure.
Claim 16
Dependent Claim
24 words
The prosthesis of claim 11 wherein the discontinuities formed in the bone-engaging surface forming the dampening structure comprise one or more leaf spring members.
Claim 17
Dependent Claim
15 words
The prostheses of claim 11 wherein the polymeric liner material is ultrahigh molecular weight polyethylene.
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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) | 1999-08-27 | 2000-02-26 | 2000-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-27 | 2004-02-26 | 2004-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-27 | 2008-02-26 | 2008-08-27 | $7700.00 | Window Closed / Lapsed |