DE20320501U1 - Instrument to restore the balance between inner and outer knee cartilages, after removal of the bones for a prosthesis implant, has pads inserted into the gap to be spread apart in parallel by a scissors linkage - Google Patents
Instrument to restore the balance between inner and outer knee cartilages, after removal of the bones for a prosthesis implant, has pads inserted into the gap to be spread apart in parallel by a scissors linkage Download PDFInfo
- Publication number
- DE20320501U1 DE20320501U1 DE20320501U DE20320501U DE20320501U1 DE 20320501 U1 DE20320501 U1 DE 20320501U1 DE 20320501 U DE20320501 U DE 20320501U DE 20320501 U DE20320501 U DE 20320501U DE 20320501 U1 DE20320501 U1 DE 20320501U1
- Authority
- DE
- Germany
- Prior art keywords
- instrument
- parallel
- gap
- bones
- spread apart
- 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.)
- Expired - Lifetime
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
- A61B2017/0268—Joint distractors for the knee
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
- A61B2090/064—Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Pathology (AREA)
- Prostheses (AREA)
Abstract
Description
Stand der TechnikState of the art
Die Implantation der Kniegelenksinnenprothese erfolgt durch Resektion der beiden Gelenkpartnerenden und anschließender Einbringung der Knieprothese unter Berücksichtigung der physiologischen Beinlänge und Beinachse.The The knee joint prosthesis is implanted by resection of the two joint partner ends and subsequent insertion of the knee prosthesis considering the physiological leg length and leg axis.
Problemproblem
Bei der Implantation der Kniegelenksinnenprothese ist es unabdingbar die Balance zwischen innerem und äußerem Seitenband wieder herzustellen. Häufig gehen schwere Arthrosen des Kniegelenks mit einem Verlust der physiologischen Beinachse im Sinne eines vermehrten O- Beines bzw. vermehrten X – Beines einher.at implantation of the knee joint prosthesis is essential to restore the balance between the inner and outer sideband. Go frequently severe osteoarthritis of the knee with a loss of physiological Leg axis in the sense of an increased bow leg or increased X leg associated.
Infolge dessen kommt es zu einer Verkürzung des Innenbandes und Elongation des Außenbandes (O – Bein) bzw. zu einer Verkürzung des Außenbandes und Elongation des Innenbandes (X – Bein).As a result this leads to a shortening of the inner ligament and elongation of the outer ligament (bow leg) or a shortening of the outer ligament and elongation of the inner ligament (X - leg).
Vor der Implantation der Kniegelenksinnenprothese ist es von entscheidender Bedeutung das ursprüngliche Bandgleichgewicht zwischen dem inneren und dem äußeren Seitenband bei physiologischer Beinachse wieder herzustellen.In front the implantation of the prosthetic knee joint is crucial Meaning the original Band balance between the inner and the outer sideband in physiological To restore the leg axis.
Würde dies nicht berücksichtigt , bestünde die Gefahr des vorzeitigen Verschleisses der Gleitpartner der Knieprothese.Would not considered , that would exist Risk of premature wear of the sliding partner of the knee prosthesis.
Erfindunginvention
Nachdem die Knochenschnitte unter Berücksichtigung der Rekonstruktion der physiologischen Beinachse erstellt worden sind, wird das Bandspannungsinstrument in den Gelenkspalt eingeführt und über einen Scherenmechanismus parallel aufgespreizt.After this taking into account the bone cuts of the reconstruction of the physiological leg axis are, the ligament tensioning instrument is inserted into the joint space and over a Scissor mechanism spread parallel.
Die Konstruktion des Instruments – mindestens eine Spreizbacke ist frei seitlich schwenkbar und dies zumindest über einen definierten Schwenkbereich- erlaubt es, daß gleiche Spannungen im inneren und äußeren Seitenband appliziert werden.The Construction of the instrument - at least an expanding jaw can be freely swiveled sideways and at least over one Defined swivel range - allows equal tensions inside and outer sideband be applied.
Die dabei auf die Seitenbänder einwirkende Kraft wird vom Chirurgen über die Meßanzeige kontrolliert und bestimmt.The doing so on the sidebands The surgeon checks and determines the force acting on the measuring display.
Kommt es unter der Aufspreizung der Zange zu keiner spontanen physiologischen Ausrichtung der Beinachse , so muß in der üblichen chirurgischen Technik das verkürzte Band gelöst wird. Unter Applikation der gleichgroßen Kraft medial wie lateral erfolgt die spontane Ausrichtung der Beinachse in physiologischer Weise.comes it under the spread of the forceps to no spontaneous physiological Alignment of the leg axis must be done in the usual surgical technique that shortened Tape loosened becomes. Applying the same force medially and laterally the spontaneous alignment of the leg axis is physiological Wise.
Die Größe der Aufspreizung der Zange kann über einen Ratschenmechanismus an beliebiger Stelle definiert arretiert werdenThe Size of the spread the pliers can over a ratchet mechanism locked in any place become
Die Ermittlung der aufgebrachten Spreizkraft erfolgt mittels einer auf eine Spreizbacke aufgebrachte DMS mit externem Anzeigegerät.The The spreading force applied is determined by means of a a spreading jaw attached strain gauge with external display device.
Eine mechanische Messung der Spreizkraft erfolgt über einen Federwaagenmechanismus, vorzugsweise an den Griff enden angebracht.A mechanical measurement of the spreading force takes place via a spring balance mechanism, preferably attached to the handle ends.
DARSTELLUNG DER ERFINDUNGPRESENTATION THE INVENTION
Die Ausgestaltung der Erfindung nach den Ansprüchen 2 bis 5 wird nachfolgend dargestellt.The Embodiment of the invention according to claims 2 to 5 is as follows shown.
Zu
Die Anlenkung an den Punkten (C, D) kann beispielsweise über eine nach bekannter Art ausgebildete Zange erfolgen, deren Backen auseinanderweichen , wenn man die Griffe schließt.The Articulation at points (C, D) can, for example, via a made in a known manner pliers whose jaws diverge when you close the handles.
Zu
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20320501U DE20320501U1 (en) | 2003-06-23 | 2003-06-23 | Instrument to restore the balance between inner and outer knee cartilages, after removal of the bones for a prosthesis implant, has pads inserted into the gap to be spread apart in parallel by a scissors linkage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20320501U DE20320501U1 (en) | 2003-06-23 | 2003-06-23 | Instrument to restore the balance between inner and outer knee cartilages, after removal of the bones for a prosthesis implant, has pads inserted into the gap to be spread apart in parallel by a scissors linkage |
Publications (1)
Publication Number | Publication Date |
---|---|
DE20320501U1 true DE20320501U1 (en) | 2004-11-11 |
Family
ID=33441952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE20320501U Expired - Lifetime DE20320501U1 (en) | 2003-06-23 | 2003-06-23 | Instrument to restore the balance between inner and outer knee cartilages, after removal of the bones for a prosthesis implant, has pads inserted into the gap to be spread apart in parallel by a scissors linkage |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE20320501U1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007016289A1 (en) * | 2005-07-28 | 2007-02-08 | Synthes (U.S.A.) | Expandable access device |
WO2007045460A2 (en) * | 2005-10-18 | 2007-04-26 | Plus Orthopedics Ag | Ligament tensioning device |
WO2017025406A1 (en) * | 2015-08-07 | 2017-02-16 | Aesculap Ag | Mechanophoric medical product |
WO2017025408A1 (en) * | 2015-08-07 | 2017-02-16 | Aesculap Ag | Mechanophoric medical product |
CN108451563A (en) * | 2018-04-04 | 2018-08-28 | 中国人民解放军总医院 | A kind of osseous surgery struts fixing device |
EP3880121A4 (en) * | 2018-11-15 | 2023-06-07 | Little Engine, LLC | Knee flexion and extension gap tensioning and measuring apparatus and method |
-
2003
- 2003-06-23 DE DE20320501U patent/DE20320501U1/en not_active Expired - Lifetime
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007016289A1 (en) * | 2005-07-28 | 2007-02-08 | Synthes (U.S.A.) | Expandable access device |
US7566302B2 (en) | 2005-07-28 | 2009-07-28 | Synthes Usa, Llc | Expandable access device |
WO2007045460A2 (en) * | 2005-10-18 | 2007-04-26 | Plus Orthopedics Ag | Ligament tensioning device |
WO2007045460A3 (en) * | 2005-10-18 | 2007-06-14 | Plus Orthopedics Ag | Ligament tensioning device |
US9216097B2 (en) | 2005-10-18 | 2015-12-22 | Smith And Nephew Orthopaedics Ag | Ligament-tensioning device |
US9782249B2 (en) | 2005-10-18 | 2017-10-10 | Smith And Nephew Orthopaedics Ag | Ligament-tensioning device and method |
WO2017025406A1 (en) * | 2015-08-07 | 2017-02-16 | Aesculap Ag | Mechanophoric medical product |
WO2017025408A1 (en) * | 2015-08-07 | 2017-02-16 | Aesculap Ag | Mechanophoric medical product |
US10758643B2 (en) | 2015-08-07 | 2020-09-01 | Aesculap Ag | Mechanophoric medical product |
CN108451563A (en) * | 2018-04-04 | 2018-08-28 | 中国人民解放军总医院 | A kind of osseous surgery struts fixing device |
EP3880121A4 (en) * | 2018-11-15 | 2023-06-07 | Little Engine, LLC | Knee flexion and extension gap tensioning and measuring apparatus and method |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R207 | Utility model specification |
Effective date: 20041216 |
|
R150 | Term of protection extended to 6 years |
Effective date: 20070105 |
|
R157 | Lapse of ip right after 6 years |
Effective date: 20100101 |