EP2049047A1 - Asymmetrische gestaltung von prothesenkomponenten zur manipulation und unterdrückung der eigenfrequenzen - Google Patents

Asymmetrische gestaltung von prothesenkomponenten zur manipulation und unterdrückung der eigenfrequenzen

Info

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Withdrawn
Application number
EP07802505A
Other languages
German (de)
English (en)
French (fr)
Inventor
Roman Preuss
Thomas Pandorf
Patricie Merkert
Heike Idink
Martin Dietrich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ceramtec GmbH
Original Assignee
Ceramtec GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ceramtec GmbH filed Critical Ceramtec GmbH
Publication of EP2049047A1 publication Critical patent/EP2049047A1/de
Withdrawn legal-status Critical Current

Links

Classifications

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    • 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
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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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    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30327—The prosthesis having different structural features at different locations within the same prosthesis differing in diameter
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    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
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    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • 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
    • 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)
EP07802505A 2006-08-04 2007-08-06 Asymmetrische gestaltung von prothesenkomponenten zur manipulation und unterdrückung der eigenfrequenzen Withdrawn EP2049047A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006036927 2006-08-04
DE102007031663A DE102007031663A1 (de) 2006-08-04 2007-07-06 Asymmetrische Gestaltung von Prothesenkomponenten zur Manipulation und Unterdrükung der Eigenfrequenzen
PCT/EP2007/058122 WO2008015284A1 (de) 2006-08-04 2007-08-06 Asymmetrische gestaltung von prothesenkomponenten zur manipulation und unterdrückung der eigenfrequenzen

Publications (1)

Publication Number Publication Date
EP2049047A1 true EP2049047A1 (de) 2009-04-22

Family

ID=38694889

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07802505A Withdrawn EP2049047A1 (de) 2006-08-04 2007-08-06 Asymmetrische gestaltung von prothesenkomponenten zur manipulation und unterdrückung der eigenfrequenzen

Country Status (6)

Country Link
EP (1) EP2049047A1 (ja)
JP (1) JP5388065B2 (ja)
KR (1) KR101388594B1 (ja)
CN (1) CN101522135B (ja)
DE (1) DE102007031663A1 (ja)
WO (1) WO2008015284A1 (ja)

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* Cited by examiner, † Cited by third party
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US8066775B2 (en) * 2009-06-12 2011-11-29 Branovacki George Joint implant
KR102640277B1 (ko) 2023-11-07 2024-02-27 주식회사 이티에스코리아 이탈방지 기능이 적용되고 조립성이 향상된 일체형 튜브 클립

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US4822368A (en) * 1986-06-02 1989-04-18 Boehringer Mannheim Corporation Sugical method of attaching enclosure member for prosthetic joint
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Also Published As

Publication number Publication date
DE102007031663A1 (de) 2008-02-21
CN101522135A (zh) 2009-09-02
CN101522135B (zh) 2011-11-23
KR101388594B1 (ko) 2014-04-23
JP2009545413A (ja) 2009-12-24
KR20090038925A (ko) 2009-04-21
WO2008015284A1 (de) 2008-02-07
JP5388065B2 (ja) 2014-01-15

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