Patent US5501687A successfully refreshed from Google Patents.
US5501687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Body for distributing bone cement for the anchoring of implants
Assignee: Sulzer Medizinaltechnik AG
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Filing: 1993-11-04
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Granted: 1996-03-26
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Expires: 2013-11-04
Abstract
Abstract A body (2) for distributing bone cement (8) rests by an elastic collar (4) against the outer edge of a hollow (1) in the bone and has a passage (5) through into the hollow (1) in the bone, into which a syringe (6) for bone cement may be inserted. In the hollow (1) in the bone the body (2) is made as a displacement body of the shape (3) of the implant which is to be inserted later. During injection into the space between the body and the hollow in the bone a designed pressure is maintained until the viscosity of the bone cement (8) is adequate for taking the body (2) out of the hollow (1) in the bone without bone cement (8) flowing back. Subsequently the actual implant may be pressed into the thus prepared but still plastically deformable countermould of bone cement (8) .
Inventors
- 👤 Hans-Georg Willert
- 👤 Kurt Bider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:39
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/32; B29C43/34; A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/8802; A61B17/8805; A61B17/8808; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/34; A61F2/46; A61F2002/4631; B29C43/36; B29C43/3642; B29C2043/3652; B29L; B29L2031/00; B29L2031/753; B29L2031/7532
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
228 words
A removable mold for distributing bone cement from a hand-held bone cement syringe and into a hip joint cavity prepared in a bone, the hip joint cavity for receiving and anchoring a hip joint implant, the mold for distributing the bone cement in the hip joint cavity so that the bone cement corresponds in shape with an outer geometry of the implant, the mold comprising: a solid rubber-like body having a molding surface that is fashioned to correspond in shape to the outer geometry of the hip joint implant, and wherein the body defines a central channel, the channel being sized to receive and position the bone cement syringe near the molding surface to allow the hope cement to be delivered through the channel with minimal travel and with minimal loss of pressure so that the cement may be evenly distributed between the bone and the molding surface upon hand operation of the syringe; and wherein the mold further includes an elastic collar integrally formed about the periphery of the body, the collar being sized to rest against the bone and to hold the molding surface spaced-apart from the bone, and wherein the elasticity of the mold allows the mold to be removed from the hip joint cavity without substantial removal of the cement when the cement reaches a desired viscosity and the hip joint implant placed therein.
Claim 2
Dependent Claim
228 words
A removable mold for distributing bone cement from a hand-held bone cement syringe and into a hip joint cavity prepared in a bone, the hip joint cavity for receiving and anchoring a hip joint implant, the mold for distributing the bone cement in the hip joint cavity so that the bone cement corresponds in shape with an outer geometry of the implant, the mold comprising: a solid rubber-like body having a molding surface that is fashioned to correspond in shape to the outer geometry of the hip joint implant, and wherein the body defines a central channel, the channel being sized to receive and position the bone cement syringe near the molding surface to allow the hope cement to be delivered through the channel with minimal travel and with minimal loss of pressure so that the cement may be evenly distributed between the bone and the molding surface upon hand operation of the syringe; and wherein the mold further includes an elastic collar integrally formed about the periphery of the body, the collar being sized to rest against the bone and to hold the molding surface spaced-apart from the bone, and wherein the elasticity of the mold allows the mold to be removed from the hip joint cavity without substantial removal of the cement when the cement reaches a desired viscosity and the hip joint implant placed therein.
Claim 3
Dependent Claim
23 words
A mold as in claim 1, wherein the body is sufficiently stable to be able to be sterilized by steam at 134° C.
Claim 4
Dependent Claim
14 words
A mold as in claim 1, wherein the collar is constructed of silicone rubber.
Claim 5
Dependent Claim
15 words
A mold as in claim 1, further comprising a release agent for wetting the body.
Claim 6
Dependent Claim
16 words
A mold as in claim 4, wherein the release agent comprises a sterile physiological cooking-salt solution.
Claim 7
Dependent Claim
233 words
A hip joint implantation system for anchoring a hip joint implant into a hip joint cavity prepared in a bone, the system comprising: a hand-held bone cement syringe for injecting bone cement; and a removable mold for receiving the bone cement syringe and for distributing the bone cement into the hip joint cavity so that the bone cement corresponds in shape with an outer geometry of the implant, the mold comprising: a solid rubber-like body having a molding surface that is sized to correspond in shape to the outer geometry of the hip joint implant, and wherein the body defines a channel, the channel being sized to receive and position the bone cement syringe near the molding surface to allow the bone cement to be delivered through the channel with minimal travel and with minimal loss of pressure so that the cement may be evenly distributed between the bone and the molding surface upon hand operation of the syringe; and wherein the mold further includes an elastic collar integrally formed about the periphery of the body, the collar being sized to rest against the bone and to hold the molding surface spaced-apart from the bone, and wherein the elasticity of the mold allows the mold to be removed from the hip joint cavity without substantial removal of the cement when the cement reaches a determined viscosity and the hip joint implant placed therein.
Claim 8
Dependent Claim
233 words
A hip joint implantation system for anchoring a hip joint implant into a hip joint cavity prepared in a bone, the system comprising: a hand-held bone cement syringe for injecting bone cement; and a removable mold for receiving the bone cement syringe and for distributing the bone cement into the hip joint cavity so that the bone cement corresponds in shape with an outer geometry of the implant, the mold comprising: a solid rubber-like body having a molding surface that is sized to correspond in shape to the outer geometry of the hip joint implant, and wherein the body defines a channel, the channel being sized to receive and position the bone cement syringe near the molding surface to allow the bone cement to be delivered through the channel with minimal travel and with minimal loss of pressure so that the cement may be evenly distributed between the bone and the molding surface upon hand operation of the syringe; and wherein the mold further includes an elastic collar integrally formed about the periphery of the body, the collar being sized to rest against the bone and to hold the molding surface spaced-apart from the bone, and wherein the elasticity of the mold allows the mold to be removed from the hip joint cavity without substantial removal of the cement when the cement reaches a determined viscosity and the hip joint implant placed therein.
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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) | 1999-03-26 | 1999-09-25 | 2000-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-26 | 2003-09-25 | 2004-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-26 | 2007-09-25 | 2008-03-26 | $7700.00 | Window Closed / Lapsed |