IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
US-0466777
(1990-01-18)
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발명자
/ 주소 |
- Matsen, III, Frederick A.
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| 출원인 / 주소 |
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| 대리인 / 주소 |
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| 인용정보 |
피인용 횟수 :
47 인용 특허 :
17 |
초록
▼
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 rec
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.
대표청구항
▼
1. 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 h
1. 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. 2. 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. 3. 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. 4. 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. 5. 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. 6. The method of claim 1, wherein the dry flowing gas is carbon dioxide. 7. The method of claim 1 wherein the bone cement, at the time of application thereof to the bone, is in a liquid state. 8. The method of claim 1, and further comprising the step of: pulsating the pressurized jet of dry flowing gas. 9. 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. 10. 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. 11. 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. 12. 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. 13. 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. 14. The method of claim 9, wherein the dry flowing gas is carbon dioxide. 15. The method of claim 9 wherein during the pressure cementing step, the cement is initially introduced to the bone in a liquid state. 16. The method of claim 9, and further comprising the step of: pulsating the pressurized jet of dry flowing gas. 17. 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. 18. 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. 19. 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. 20. 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. 21. 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. 22. The method of claim 17, wherein the dry flowing gas is carbon dioxide. 23. The method of claim 17, and further comprising the step of: oscillating the flow of the pressurized jet of dry flowing gas. 24. 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. 25. The process of claim 24 wherein the bone cement, at the time of application thereof to the bone, is in a liquid state. 26. 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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