EP2049047A1 - Asymmetric formation of prosthetic components for the manipulation and suppression of natural frequencies - Google Patents
Asymmetric formation of prosthetic components for the manipulation and suppression of natural frequenciesInfo
- Publication number
- EP2049047A1 EP2049047A1 EP07802505A EP07802505A EP2049047A1 EP 2049047 A1 EP2049047 A1 EP 2049047A1 EP 07802505 A EP07802505 A EP 07802505A EP 07802505 A EP07802505 A EP 07802505A EP 2049047 A1 EP2049047 A1 EP 2049047A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- shank
- natural frequencies
- bores
- suppression
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2/32—Joints for the hip
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0018—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in elasticity, stiffness or compressibility
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0039—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in diameter
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/0075—Sound-damping or noise-reducing means
Definitions
- the invention relates to a shaft of a hip joint prosthesis for implantation in the femur of a patient, wherein the shaft can be coupled with a ball head, which in turn is rotatably inserted in the calotte of a socket insert.
- the market has a variety of prosthetic systems for the replacement of the natural hip joint. These usually consist of a shaft 1 coupled to a ball head 2 and a hip socket 4 coupled with a socket insert 3. Shank 1 and acetabulum 4 are connected to the body by ingrowth in the Oberschenkel properties. The spherical head 2 is rotatably mounted in the calotte of the socket insert 3 - degree of freedom: 1 (see Figure 1).
- the vibrations emitted as a result of the occurrence of the stick-slip effect act as excitation and lead to the oscillation of the individual components or component groups of the artificial joint.
- one or more of the natural frequencies of the components or groups lie in the audible spectrum (approximately 16-20000 Hz)
- they may be used by the patient as the wearer of the artificial hip joint, e.g. in the form of the so-called squeaking, be perceived acoustically. This is undesirable to the patient, u. U. also perceived by its environment and possibly leads to a significant personal restriction.
- one or more of the natural frequencies of the components or groups lie in the audible spectrum (approximately 16-20000 Hz), they can be perceived acoustically by the patient as the wearer of the artificial hip joint, for example in the form of the so-called squeaking. 3.
- contact between the metal shaft and the metal socket or between the metal shaft and the ceramic insert may occur, in particular in the case of extreme socket positions.
- this contact is not only pointwise, but by a corresponding leg movement over an angle, so that it comes to a "grinding" of the metal shank over Pfanne / Lnsert, this can lead to a self-excited oscillation, lies this excitement in the field of If one or more of the natural frequencies of the components or groups in the audible spectrum (about 16-20000 Hz) are present, they can be interpreted by the patient as "natural frequencies" of the components or component groups involved Carrier of the artificial hip joint, for example in the form of the so-called squeaking, be perceived acoustically.
- the invention has the object of developing a shaft according to the preamble of claim 1 so that no squeaking occurs.
- the shaft is formed asymmetrically in its outer and / or inner geometry and / or material composition.
- the targeted asymmetric design of the shank prevents the formation of intricate shapes of the shank and significantly attenuates the manifestation of vibrations in the component in the acoustically perceptible frequency range.
- the proposed asymmetry of the shank can be achieved by various measures that can be combined with one another: in the form of an asymmetric outer geometry in all three spatial directions (cross-sectional area and longitudinal axis), in the form of an asymmetric inner geometry in all three spatial directions (cross-sectional area and Longitudinal axis), as well as by asymmetric composition of the shank of materials with different stiffness and damping properties.
- the outer and inner geometry is designed asymmetrically in all three spatial directions.
- the outer borders of the cross-sectional areas may be asymmetrically shaped and / or the shaft may be discontinuously shaped along the shaft axis.
- the shaft has continuous transverse bores.
- the asymmetric configuration of the inner geometry is achieved in one embodiment of the invention in that the shaft has inner cavities as different volume as possible.
- longitudinal bores are introduced in the shaft, which can adjoin one another discontinuously.
- Another inventive embodiment is characterized in that holes of different diameters are introduced in the connecting web.
- the asymmetrical configuration of the material composition can be achieved by the fact that the stiffnesses and / or damping properties and / or the material along the longitudinal axis of the shaft are different.
- FIG. 1 shows the state of the art.
- a hip prosthesis usually consists of a shaft 1 coupled to a ball head 2 and a hip socket 4 coupled 3.
- Shaft 1 and acetabulum 4 are connected to the body of the patient by ingrowth into the thigh or pelvic bone 15 and are carriers for the ball head 2 and cup insert 3, respectively.
- the ball head 2 is in the cup of the acetabular insert 3 rotatably mounted.
- FIG. 2 shows a shaft 1 according to the invention, in which recesses are arranged on the surface for the asymmetrical design of the outer geometry.
- FIG. 3 shows a cross section according to the invention through a shank (solid line), which is opposite to the cross section of a conventional shank (dashed line).
- the outer border 7 of the cross-sectional area of the shank is asymmetrically shaped to avoid squeaking.
- the shaft 1 is thereby formed discontinuously along the shaft axis 9.
- Figure 4 shows continuous transverse bores 10. The diameter of these transverse bores 10 is chosen differently.
- Figure 5 shows the asymmetrical design of the inner geometry of the shaft 1 inner cavities 1 1 in the cross-sectional area 8.
- the volume of the inner cavities 1 1 is preferably different.
- FIG. 6 shows a shaft according to the invention with longitudinal bores 12 which can adjoin one another discontinuously.
- a longitudinal bore 12 is also arranged in the connecting web 13.
- FIG. 7a shows a shaft 1 with bores 14 in the connecting web 13.
- FIG. 7b shows a section along the line AA of FIG. 7a.
- the asymmetrical configuration of the shank 1 can also be achieved in that the material or the material of the shank 1 changes along the shank axis 9. It is important here that the modulus of elasticity differs from the conventional shaft material.
- the recesses 6 in Figure 2 can also be filled by a second material deviating from the base material of the shaft 1 modulus of elasticity.
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006036927 | 2006-08-04 | ||
DE102007031663A DE102007031663A1 (en) | 2006-08-04 | 2007-07-06 | Asymmetrical design of prosthetic components for manipulation and suppression of natural frequencies |
PCT/EP2007/058122 WO2008015284A1 (en) | 2006-08-04 | 2007-08-06 | Asymmetric formation of prosthetic components for the manipulation and suppression of natural frequencies |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2049047A1 true EP2049047A1 (en) | 2009-04-22 |
Family
ID=38694889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07802505A Withdrawn EP2049047A1 (en) | 2006-08-04 | 2007-08-06 | Asymmetric formation of prosthetic components for the manipulation and suppression of natural frequencies |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2049047A1 (en) |
JP (1) | JP5388065B2 (en) |
KR (1) | KR101388594B1 (en) |
CN (1) | CN101522135B (en) |
DE (1) | DE102007031663A1 (en) |
WO (1) | WO2008015284A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8066775B2 (en) * | 2009-06-12 | 2011-11-29 | Branovacki George | Joint implant |
KR102640277B1 (en) | 2023-11-07 | 2024-02-27 | 주식회사 이티에스코리아 | Integrated tube clip with anti-separation function and improved assembly |
Family Cites Families (28)
Publication number | Priority date | Publication date | Assignee | Title |
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DE2933237A1 (en) * | 1979-08-16 | 1981-03-26 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8000 München | Ball joint prosthesis component - has shank with degrees of rigidity differing over length and cross=section |
DE3120147A1 (en) * | 1981-05-18 | 1982-12-09 | Mecron Medizinische Produkte Gmbh, 1000 Berlin | "HIP JOINT PROSTHESIS" |
JPS6045356A (en) * | 1983-08-20 | 1985-03-11 | 住友電気工業株式会社 | Artificial joint |
US4595393A (en) * | 1983-11-23 | 1986-06-17 | Mecron Medizinische Produkte Gmbh | Hip joint prosthesis having a hollow shaft |
US4822368A (en) * | 1986-06-02 | 1989-04-18 | Boehringer Mannheim Corporation | Sugical method of attaching enclosure member for prosthetic joint |
NL8702626A (en) * | 1987-11-03 | 1989-06-01 | Orthopaedic Tech Bv | METHOD FOR FORMING A GEOMETRY OF AN ENDOPROTHESIS, A FEMUR HEAD PROSTHESIS, AN ACETABULUM PROSTHESIS, A METHOD FOR BOTTING A FEMUR HEAD PROSTHESIS AND AN INSTRUMENT FOR PLACING ACROTHESES |
CH674307A5 (en) * | 1988-02-26 | 1990-05-31 | Sulzer Ag | |
FR2636519B1 (en) * | 1988-09-16 | 1993-03-12 | Breard Francis | JOINT PROSTHESIS, ESPECIALLY FEMALE PROSTHESIS, WITH SELF-CUSHIONING EFFECT |
JPH0592020A (en) * | 1991-09-30 | 1993-04-16 | Terumo Corp | Artificial joint |
CN2114434U (en) * | 1992-03-26 | 1992-09-02 | 天津开发区美信生物医学工程联合公司 | Bionics artifical joint for hiphone |
DE9213218U1 (en) * | 1992-10-01 | 1992-11-26 | Aesculap AG, 7200 Tuttlingen | Endoprosthesis shaft |
US5702446A (en) * | 1992-11-09 | 1997-12-30 | Board Of Regents, The University Of Texas System | Bone prosthesis |
JPH06218002A (en) * | 1993-01-26 | 1994-08-09 | Amuko Soyuuzu:Kk | Artificial lumbar joint |
CN2176125Y (en) * | 1994-01-17 | 1994-09-07 | 陈汉文 | Artificial hip joint with titanium wires on surface |
JPH07265341A (en) * | 1994-04-01 | 1995-10-17 | Yoshihiro Kishigami | Stem for fixing artificial joint |
DE4428099C5 (en) * | 1994-08-09 | 2004-12-30 | Moos, Norbert, Dr. | Femoral head-shaft endoprosthesis that can be attached with bone cement |
FR2733145B1 (en) * | 1995-04-18 | 1997-09-26 | Orthotechnique | HIP PROSTHESIS WITH SEAL |
CN2231537Y (en) * | 1995-05-25 | 1996-07-24 | 施鲁孙 | Combined artificial hip joint handle |
JPH0951907A (en) * | 1995-08-11 | 1997-02-25 | Asahi Optical Co Ltd | Stem assembly for artificial joint |
TW386873B (en) | 1995-12-19 | 2000-04-11 | Cerasiv Gmbh | Hip joint prosthesis |
DE19614949A1 (en) * | 1996-04-16 | 1997-10-23 | Horst Broziat | Bone implant |
WO1997046179A1 (en) * | 1996-06-03 | 1997-12-11 | Mathys Medizinaltechnik Ag | Femur component for a hip endoprosthesis |
FR2751202B1 (en) * | 1996-07-22 | 2001-03-16 | Zacouto Fred | SKELETAL IMPLANT |
DE19635307A1 (en) * | 1996-09-01 | 1998-03-05 | Copf Franz Prof Dr Med | Hip joint prosthesis component with cage and supporting plate |
AU2001243663B2 (en) | 2000-03-14 | 2004-05-27 | Smith & Nephew, Inc. | Variable geometry rim surface acetabular shell liner |
AU2002236886A1 (en) | 2001-01-25 | 2002-08-06 | Smith And Nephew, Inc. | Containment system for constraining a prosthetic component |
FR2857853B1 (en) * | 2003-07-22 | 2005-08-26 | Biomet Merck France | FEMALE ROD FOR HIP PROSTHESIS |
US20080234833A1 (en) * | 2004-03-23 | 2008-09-25 | B.I. Tec Ltd | Method of Designing and Manufacturing Artificial Joint Stem with Use of Composite Material |
-
2007
- 2007-07-06 DE DE102007031663A patent/DE102007031663A1/en not_active Ceased
- 2007-08-06 KR KR1020097004497A patent/KR101388594B1/en not_active IP Right Cessation
- 2007-08-06 EP EP07802505A patent/EP2049047A1/en not_active Withdrawn
- 2007-08-06 CN CN2007800290498A patent/CN101522135B/en not_active Expired - Fee Related
- 2007-08-06 JP JP2009523266A patent/JP5388065B2/en not_active Expired - Fee Related
- 2007-08-06 WO PCT/EP2007/058122 patent/WO2008015284A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2008015284A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2008015284A1 (en) | 2008-02-07 |
CN101522135B (en) | 2011-11-23 |
JP5388065B2 (en) | 2014-01-15 |
CN101522135A (en) | 2009-09-02 |
DE102007031663A1 (en) | 2008-02-21 |
KR101388594B1 (en) | 2014-04-23 |
KR20090038925A (en) | 2009-04-21 |
JP2009545413A (en) | 2009-12-24 |
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