Patent US5037437A successfully refreshed from Google Patents.
US5037437A
Expired / Lapsed
US
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Method of bone preparation for prosthetic fixation
Assignee: WASHINGTON, University of
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Filing: 1990-01-18
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Granted: 1991-08-06
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Expires: 2010-01-18
Abstract
Abstract The method of this invention relates to preparing a bone to secure a prosthesis thereto by improving the mechanical interdigitation of bone cement and the bone and facilitating hemostasis of the bone. First, the bone is mechanically shaped to expose cancellous bone in a desired configuration for reception of a joint prosthesis. A pressurized jet of dry-flowing gas is then applied to the exposed bone, to clean and dry the trabecular interstices of the exposed cancellous bone. To further withdraw debris and liquids dislodged from the interstices of the prepared bone by the pressurized jet of dry-flowing gas, suction is applied to the bone concurrently with the application of the pressurized jet of dry-flowing gas. Bone cement in liquid form is then applied to the bone, with cement penetration into the cleaned and dried interstices of the bone.
Inventors
- 👤 Frederick A. Matsen, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:41
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/8802; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4675; A61F2/30721; A61F2/30723; A61F2/32; A61F2/36; A61F2/3662; A61F2/3676; A61F2002/4631
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
80 words
A method to improve mechanical interdigitation of bone cement and a prepared bone which comprises the steps of: mechanically shaping a bone surface, which includes exposed cancellous bone, for reception of a joint prosthesis; applying a pressurized jet of dry flowing gas having a relatively high diffusion coefficient relative to oxygen or nitrogen to the bone surface, to clean and dry the trabecular interstices of the exposed cancellous bone; and forcing bone cement into the dried interstices of the bone.
Claim 2
Independent Claim
80 words
A method to improve mechanical interdigitation of bone cement and a prepared bone which comprises the steps of: mechanically shaping a bone surface, which includes exposed cancellous bone, for reception of a joint prosthesis; applying a pressurized jet of dry flowing gas having a relatively high diffusion coefficient relative to oxygen or nitrogen to the bone surface, to clean and dry the trabecular interstices of the exposed cancellous bone; and forcing bone cement into the dried interstices of the bone.
Claim 3
Dependent Claim
29 words
The method of claim 1, and further comprising the step of: washing the bone with a lavage solution prior to application of the pressurized jet of dry flowing gas.
Claim 4
Dependent Claim
35 words
The method of claim 2, and further comprising the step of: applying suction to the bone to withdraw surface debris and the lavage solution prior to application of the pressurized jet of dry flowing gas.
Claim 5
Dependent Claim
34 words
The method of claim 1, and further comprising the step of: applying suction to the bone to initially withdraw liquids and debris therefrom prior to application of the pressurized jet of dry flowing gas.
Claim 6
Dependent Claim
52 words
The method of claim 1, and further comprising the step of: applying suction to the bone concurrently with the application of the pressurized jet of dry flowing gas to withdraw debris and liquids dislodged from the interstices of the prepared bone by the application of the pressurized jet of dry flowing gas.
Claim 7
Dependent Claim
13 words
The method of claim 1, wherein the dry flowing gas is carbon dioxide.
Claim 8
Dependent Claim
23 words
The method of claim 1 wherein the bone cement, at the time of application thereof to the bone, is in a liquid state.
Claim 9
Dependent Claim
19 words
The method of claim 1, and further comprising the step of: pulsating the pressurized jet of dry flowing gas.
Claim 10
Independent Claim
90 words
A method to improve cement penetration and bond strength of a prosthetic fixation, such as an implant, with prepared bone, comprising the steps of: mechanically shaping a bone surface, which includes exposed cancellous bone, for reception of the implant; applying a pressurized jet of dry flowing gas having a relatively high diffusion coefficient relative to oxygen or nitrogen to the prepared bone surface to clean and dry the bone; and pressure cementing the implant into the prepared bond, with cement penetration into the cleaned and dried interstices of the bone.
Claim 11
Independent Claim
90 words
A method to improve cement penetration and bond strength of a prosthetic fixation, such as an implant, with prepared bone, comprising the steps of: mechanically shaping a bone surface, which includes exposed cancellous bone, for reception of the implant; applying a pressurized jet of dry flowing gas having a relatively high diffusion coefficient relative to oxygen or nitrogen to the prepared bone surface to clean and dry the bone; and pressure cementing the implant into the prepared bond, with cement penetration into the cleaned and dried interstices of the bone.
Claim 12
Dependent Claim
29 words
The method of claim 9, and further comprising the step of: washing the bone with a lavage solution prior to application of the pressurized jet of dry flowing gas.
Claim 13
Dependent Claim
35 words
The method of claim 10, and further comprising the step of: applying suction to the bone to withdraw surface debris and the lavage solution prior to application of the pressurized jet of dry flowing gas.
Claim 14
Dependent Claim
34 words
The method of claim 9, and further comprising the step of: applying suction to the bone to initially withdraw liquids and debris therefrom prior to application of the pressurized jet of dry flowing gas.
Claim 15
Dependent Claim
52 words
The method of claim 9, and further comprising the step of: applying suction to the bone concurrently with the application of the pressurized jet of dry flowing gas to withdraw debris and liquids dislodged from the interstices of the prepared bone by the application of the pressurized jet of dry flowing gas.
Claim 16
Dependent Claim
13 words
The method of claim 9, wherein the dry flowing gas is carbon dioxide.
Claim 17
Dependent Claim
23 words
The method of claim 9 wherein during the pressure cementing step, the cement is initially introduced to the bone in a liquid state.
Claim 18
Dependent Claim
19 words
The method of claim 9, and further comprising the step of: pulsating the pressurized jet of dry flowing gas.
Claim 19
Independent Claim
55 words
A method of facilitating hemostasis of surgically prepared bone, comprising the step of: exposing the trabecular interstices of the prepared bone to a pressurized jet of dry flowing gas having a relatively high diffusion coefficient relative to oxygen or nitrogen, to substantially remove debris and liquids from the prepared bone, thereby enabling natural rapid coagulation.
Claim 20
Independent Claim
55 words
A method of facilitating hemostasis of surgically prepared bone, comprising the step of: exposing the trabecular interstices of the prepared bone to a pressurized jet of dry flowing gas having a relatively high diffusion coefficient relative to oxygen or nitrogen, to substantially remove debris and liquids from the prepared bone, thereby enabling natural rapid coagulation.
Claim 21
Dependent Claim
31 words
The method of claim 17, and further comprising the step of: washing the bone with a lavage solution prior to the exposure thereof to the pressurized jet of dry flowing gas.
Claim 22
Dependent Claim
39 words
The method of claim 18, and further comprising the step of: applying suction to the bone to withdraw surface debris and the lavage solution prior to the exposure of the bone to the pressurized jet of dry flowing gas.
Claim 23
Dependent Claim
38 words
The method of claim 17, and further comprising the step of: applying suction to the bone to initially withdraw liquids and debris therefrom prior to the exposure of the bone to the pressurized jet of dry flowing gas.
Claim 24
Dependent Claim
51 words
The method of claim 17, and further comprising the step of: applying suction to the bone concurrently with the exposure of the bone to the pressurized jet of dry flowing gas, to withdraw debris and liquids dislodged from the interstices of the prepared bone by pressurized jet of dry flowing gas.
Claim 25
Dependent Claim
13 words
The method of claim 17, wherein the dry flowing gas is carbon dioxide.
Claim 26
Dependent Claim
22 words
The method of claim 17, and further comprising the step of: oscillating the flow of the pressurized jet of dry flowing gas.
Claim 27
Dependent Claim
92 words
In a process for preparing a bone for the application of bone cement thereto, where a surface of the bone has been shaped to expose cancellous bone with trabecular interstices therein, the improvement which comprises: applying a pressurized jet of dry flowing carbon dioxide to the shaped bone surface to clean and dry the trabecular interstices of the exposed cancellous bone so that the mechanical interdigitation of the bone cement and the bone is improved when the bone cement is later forced against the bone surface and into the trabecular interstices thereunder.
Claim 28
Dependent Claim
92 words
In a process for preparing a bone for the application of bone cement thereto, where a surface of the bone has been shaped to expose cancellous bone with trabecular interstices therein, the improvement which comprises: applying a pressurized jet of dry flowing carbon dioxide to the shaped bone surface to clean and dry the trabecular interstices of the exposed cancellous bone so that the mechanical interdigitation of the bone cement and the bone is improved when the bone cement is later forced against the bone surface and into the trabecular interstices thereunder.
Claim 29
Dependent Claim
23 words
The process of claim 24 wherein the bone cement, at the time of application thereof to the bone, is in a liquid state.
Claim 30
Dependent Claim
102 words
In a process for preparing a bone for the application of bone cement thereto, where a surface of the bone has been shaped to expose cancellous bone with trabecular interstices therein, the improvement which comprises: applying a pressurized jet of dry flowing gas having a relatively high diffusion coefficient relative to oxygen or nitrogen to the shaped bone surface to clean and dry the trabecular interstices of the exposed cancellous bone so that the mechanical interdigitation of the bone cement and the bone is improved when the bone cement is later forced against the bone surface and into the trabecular interstices thereunder.
Claim 31
Dependent Claim
102 words
In a process for preparing a bone for the application of bone cement thereto, where a surface of the bone has been shaped to expose cancellous bone with trabecular interstices therein, the improvement which comprises: applying a pressurized jet of dry flowing gas having a relatively high diffusion coefficient relative to oxygen or nitrogen to the shaped bone surface to clean and dry the trabecular interstices of the exposed cancellous bone so that the mechanical interdigitation of the bone cement and the bone is improved when the bone cement is later forced against the bone surface and into the trabecular interstices thereunder.
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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) | 1994-08-05 | 1995-02-04 | 1995-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-05 | 1999-02-04 | 1999-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-05 | 2003-02-04 | 2003-08-06 | $7700.00 | Window Closed / Lapsed |