DE10335442A1 - Ball element temporarily used for determination of position of hip replacement unit, comprising adjustable components - Google Patents

Ball element temporarily used for determination of position of hip replacement unit, comprising adjustable components Download PDF

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Publication number
DE10335442A1
DE10335442A1 DE10335442A DE10335442A DE10335442A1 DE 10335442 A1 DE10335442 A1 DE 10335442A1 DE 10335442 A DE10335442 A DE 10335442A DE 10335442 A DE10335442 A DE 10335442A DE 10335442 A1 DE10335442 A1 DE 10335442A1
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Germany
Prior art keywords
cone
determination
ball head
length
test ball
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Withdrawn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
DE10335442A
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German (de)
Inventor
Emmanuel Anapliotis
Curt Kranz
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Merete Medical GmbH
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Merete Medical GmbH
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Filing date
Publication date
Application filed by Merete Medical GmbH filed Critical Merete Medical GmbH
Priority to DE10335442A priority Critical patent/DE10335442A1/en
Publication of DE10335442A1 publication Critical patent/DE10335442A1/en
Withdrawn legal-status Critical Current

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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
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4684—Trial or dummy prostheses
    • A—HUMAN NECESSITIES
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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
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
    • A—HUMAN NECESSITIES
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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
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30354—Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
    • A—HUMAN NECESSITIES
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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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    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30362—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
    • A61F2002/3037—Translation along the common longitudinal axis, e.g. piston
    • A61F2002/30372—Translation along the common longitudinal axis, e.g. piston with additional means for limiting said translation
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    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30362—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
    • A61F2002/3037—Translation along the common longitudinal axis, e.g. piston
    • A61F2002/30373—Translation along the common longitudinal axis, e.g. piston with additional means for preventing said translation
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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
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30474—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using an intermediate sleeve interposed between both prosthetic parts to be coupled
    • 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
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30507—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a threaded locking member, e.g. a locking screw or a set screw
    • 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
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30565—Special structural features of bone or joint prostheses not otherwise provided for having spring elements
    • A61F2002/30566—Helical springs
    • 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
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30593—Special structural features of bone or joint prostheses not otherwise provided for hollow
    • 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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    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
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    • A—HUMAN NECESSITIES
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    • A61F2/02—Prostheses implantable into the body
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    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30772—Apertures or holes, e.g. of circular cross section
    • A61F2002/30774—Apertures or holes, e.g. of circular cross section internally-threaded
    • A—HUMAN NECESSITIES
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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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    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
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    • A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
    • A61F2250/0097—Visible markings, e.g. indicia

Abstract

For a first implant or a replacement of a worn out unit the final position has to be determined with a test element. The test element is assembled of a calotte-shaped head (1) with a cylindrical inner space accommodating a cylindrical element (3) with a conical inner space. A movable spring supported conical element (2, 4) is positioned inside the space. A scale printed on the outer surface of the cone (4) can be used for a determination of the length of the collum femoris.

Description

Die Erfindung betrifft eine Vorrichtung zum Ermitteln der Endpositionen beim Implantieren von Endoprothesen, insbesondere für die intraoperative Ermittlung und Feinkorrektur der Halslänge und des CCD-Winkels bzw. der Antetorsion sowie auch beim Austauschen von Teilen eines Hüftendoprothesen- Systems.The The invention relates to a device for determining the end positions when implanting endoprostheses, especially for the intraoperative determination and fine adjustment of the neck length and the CCD angle or the Antetorsion and also during replacement of parts of a hip prosthesis system.

Für die Ermittlung der Endpositionen beim Implantieren von Endoprothesen oder beim Austausch der vorhandenen Erstversorgung kann auf handelsübliche Probieradapter und Probesteckköpfe zurückgegriffen werden. Dabei werden auf den Konusschaft der eingesetzten Endoprothese Probeadapter unterschiedlicher Länge aufgesetzt und auf den Probeadapter eine entsprechende Probekugel gesetzt. Anschließend wird die Kugel mit der Pfanne in Eingriff gebracht und der Operateur kann durch mehrfaches probieren mit Probeadaptern unterschiedlicher Länge die Feinkorrektur der Halslänge ermitteln. Nun werden Probeadapter und Probesteckkopf entfernt und der so ermittelte zum Verbleib bestimmte definitive modulare Steckkopf mit Adapter entsprechender Länge eingesetzt. Bei Hüftgelenkrevisionen wird aufgrund von Verschleiß oder Lockerung der Austausch der vorhandenen Erstversorgung notwendig, wobei der modulare Steckkopf vom Metallkonus des implantierten Schaftes der Endoprothese abgezogen wird und ein anschließender Neuaufbau mit gleichzeitiger Korrektureinstellung des Halslängenausgleiches erfolgt. In der DE OS 100 56 698 A1 wird eine entsprechende Handhabung beschrieben, wobei hier zusätzlich zum Halslängenausgleich ein Adapter mit exzentrischem Innenkonus auf den Metallkonus des Schaftes der verbleibenden Endoprothese gebracht wird und der Operateur durch drehen des Adapters die erforderliche und gewünschte Korrektureinstellung des CCD- Winkels (Centrum- Collum- Diaphyse) ermittelt.For the investigation the end positions when implanting endoprostheses or Exchanging the existing primary care can be done on commercially available trial adapter and Probesteckköpfe recourse become. It is on the conical shaft of the endoprosthesis used Test adapters of different lengths put on and on the sample adapter a corresponding test ball set. Subsequently the ball is engaged with the pan and the surgeon can try several times with trial adapters of different Length the Determine fine correction of neck length. Now sample adapter and Probesteckkopf be removed and the thus determined to remain certain definitive modular plug head with adapter corresponding Length used. For hip joint revisions is due to wear or Easing the exchange of existing primary care necessary wherein the modular plug head from the metal cone of the implanted shaft the endoprosthesis is withdrawn and a subsequent rebuilding with simultaneous Correction setting of neck length compensation he follows. In DE OS 100 56 698 A1 a corresponding handling described here, in addition here for neck length compensation Adapter with eccentric inner cone on the metal cone of the shaft the remaining endoprosthesis is brought and the surgeon through turn the adapter the required and desired correction setting of the CCD angle (centrum-collum diaphysis).

Diesen bekannten und eingeführten Methoden haftet der Nachteil an, das der Operateur während der Operation mehrere Arbeitsschritte durchführen muss, um schließlich für den Patienten stufenweise die exakte Endposition der Endoprothese festlegen zu können. Jeder vermeidbare Arbeitschritt stellt für den Patienten eine zusätzliche körperliche Belastung und für den Operateur einen höheren Zeitaufwand dar.this known and imported Methods adheres to the disadvantage that the surgeon during the Operation must perform several steps to finally for the patient Gradually set the exact end position of the endoprosthesis can. Each avoidable step provides the patient with an extra physical Load and for the surgeon a higher Time required.

Die Erfindung hat sich dementsprechend die Aufgabe gestellt, eine Vorrichtung zu Schaffen, die das Ermitteln der Endposition beim Implantieren einer Endoprothese oder beim Austausch einer vorhandenen Erstversorgung in einem Schritt auf einfache Art ermöglicht.The The invention accordingly has the task of a device To provide the determining of the final position during implantation an endoprosthesis or when replacing an existing primary care in a single step in a simple way.

Zur Lösung dieser Aufgabe wird eine Vorrichtung zum Ermitteln der Endpositionen beim Implantieren von Endoprothesen für die intraoperative Ermittlung und Feinkorrektur der Halslänge auch beim Austauschen von Teilen eines Hüftendoprothesen- Systems vorgeschlagen, mit der gleichzeitig die erforderliche und gewünschte Korrektureinstellung des CCD- Winkels durchgeführt werden kann.to solution This object is a device for determining the end positions when implanting endoprostheses for intraoperative detection and fine adjustment of the neck length also proposed when replacing parts of a hip prosthesis system, with at the same time the required and desired correction setting of the CCD angle can be.

Erfindungsgemäß wird ein Probekugelkopf mit einem beweglichen Konusadapter ausgestattet, der über eine Druckfeder eine Längenanpassung an die Halslänge der Endoprothese bewirkt. Der Konusadapter ist im sichtbaren Bereich mit einer Positionsskala versehen, auf der die für den Patienten optimal einzustellende Länge des Collum femoris abgelesen werden kann. Allgemein sind Adapter in unterschiedlichen Längen verfügbar, üblich sind Abstufungen von 3,5 mm, so dass Vorteilhafterweise die Positionsskala mit einer derartigen Referenzteilung ausgestattet ist. Gleichzeitig kann mit einer Feststelleinrichtung, beispielsweise mit einer Schraube, die ermittelte Länge des Collum femoris fixiert werden so das auch außerhalb der Operationszone ein konservativer Längenvergleich mit üblicherweise vorhandenen Adaptern möglich ist.According to the invention is a Test ball head equipped with a movable cone adapter, which has a Compression spring a length adjustment to the neck length causes the endoprosthesis. The cone adapter is in the visible range provided with a position scale on which to set the optimal for the patient Length of the Collum femoris can be read. Generally, adapters are in different lengths available, are common Gradations of 3.5 mm, so that advantageously the position scale equipped with such a reference division. simultaneously can with a locking device, for example with a screw, the determined length the collum femoris are fixed so that outside the surgical area a conservative length comparison with usually existing adapters possible is.

Die stufenlose Korrektureinstellung des CCD- Winkels und der Torsion wird durch Drehung des Probekugelkopfes vorgenommen. Die Bohrung im Probekugelkopf, in der der bewegliche Konusadapter fixiert werden kann, ist für die variable Antetorsions-Retrotorsionseinstellung außermittig angeordnet. Wird der Probekugelkopf an den dafür vorgesehenen Stellflächen gedreht, bewegt der Exzenter über den Konusadapter den implantierten Schaft. Auf der Unterseite des Probekugelkopfes ist vorteilhafterweise eine weitere Positionsskala angeordnet von der stufenlos die optimale Endposition auf Adapter mit Offset übertragen werden kann.The stepless correction adjustment of the CCD angle and the torsion is made by rotation of the sample ball head. The hole in the Test ball head in which the movable cone adapter is fixed can, is for the variable antetorsion retrotorsion setting off-center arranged. If the test ball head is rotated on the space provided, the eccentric moves over the cone adapter the implanted shaft. On the bottom of the Probe ball head is advantageously another position scale arranged from the steplessly the optimal final position on adapter with Transfer offset can be.

Anschließend wird Probekugel mit Probeadapter entfernt, und durch Kugelkopf und Adapter für die ermittelte Endposition ersetzt.Subsequently, will Test ball removed with trial adapter, and by ball head and adapter for the replaced final position.

Die Erfindungsgemäße Vorrichtung zur Ermittlung der Endpositionen beim Implantieren von Endoprothesen soll anhand von Zeichnungen näher erläutert werden.The Device according to the invention for determining the end positions when implanting endoprostheses will be explained in more detail with reference to drawings.

Es zeigen:It demonstrate:

1 Die erfindungsgemäße Vorrichtung in Schnittdarstellung bestehend aus Probekugelkopf, verschiebbarem Konus, Feststelleinrichtung und Druckfeder. 1 The inventive device in sectional view consisting of test ball head, sliding cone, locking device and Spring.

2 Die erfindungsgemäße Vorrichtung mit Positionsskala für die Ermittlung der Halslänge. 2 The inventive device with position scale for determining the neck length.

3 Ansicht der erfindungsgemäßen Vorrichtung von der Seite der Konusöffnung mit Darstellung der Exzentrizität und Positionsskala für die Ermittlung der Torsion. 3 View of the device according to the invention from the side of the cone opening with representation of the eccentricity and position scale for the determination of the torsion.

11
ProbekugelkopfCarrier ball head
22
Druckfedercompression spring
33
verschiebbarer Konusshiftable cone
44
Konusführungcone guidance
55
FeststelleinrichtungLocking device
6 6
Positionsskala für die Ermittlung der Halslängeposition scale for the Determination of the neck length
77
Positionsskala für die Ermittlung der Torsionposition scale for the Determination of the torsion
88th
Stellflächefootprint

Die Vorrichtung zum Ermitteln der Endposition beim Implantieren von Endoprothesen besteht aus einem Probekugelkopf (1), der mit einer zylindrischen Bohrung versehen ist die als Konusführung (4) dient. Die Konusführung (4) kann mittig oder außermittig angeordnet sein. In einer mittigen Ausführungsform ist es ausschließlich möglich die Endposition der Halslänge (Collum femoris) zu bestimmen. In einer weiteren vorteilhaften Ausführung wurde die Konusführung (4) außermittig ausgeführt. Wird der Probekugelkopf an den dafür vorgesehenen Stellflächen gedreht, bewegt der Exzenter über den Konusadapter den implantierten Schaft und es ist möglich die Endposition des CCD-Winkels und der Torsion zu bestimmen. In die Konusführung (4) ist der verschiebbare Konus (3) eingesetzt. Im Probekugelkopf(1) ist über dem verschiebbaren Konus (3) eine Druckfeder (2) angeordnet, die eine Verschiebung des Konus (3) in axialer Richtung der Konusaufnahme der Endoprothese bewirkt. Für die optisch bessere Wahrnehmung ist der verschiebbare Konus mit einer Positionsskala ausgestattet auf der die für den Patienten optimal einzustellende Länge des Collum femoris abgelesen werden kann. In den Stellflächen (8), die zum Verdrehen des Probekugelkopfes (1) vorgesehen sind, sind zu beiden Seiten Gewindebohrungen (9) eingebracht, über die in einfacher Weise die optimale Länge fixiert werden kann. An der offenen Seite des Probekugelkopfes (1) ist kreisförmig um die Konusführung (4) eine weitere Positionsskala (7) für die Bestimmung der Endposition des CCD-Winkels und der Torsion der Endoprothese angeordnet.The device for determining the end position when implanting endoprostheses consists of a test ball head ( 1 ), which is provided with a cylindrical bore which serves as a cone guide ( 4 ) serves. The cone guide ( 4 ) can be arranged centrally or eccentrically. In a central embodiment, it is only possible to determine the end position of the neck length (collum femoris). In a further advantageous embodiment, the cone guide ( 4 ) executed off-center. If the test ball head is turned on the provided space, the eccentric moves via the cone adapter the implanted shaft and it is possible to determine the final position of the CCD angle and the torsion. Into the cone guide ( 4 ) is the sliding cone ( 3 ) used. In the test ball head ( 1 ) is above the sliding cone ( 3 ) a compression spring ( 2 ) arranged a displacement of the cone ( 3 ) in the axial direction of the conical reception of the endoprosthesis causes. For optically better perception of the sliding cone is equipped with a position scale on the optimal for the patient to be adjusted length of the collum femoris can be read. In the shelves ( 8th ) used to rotate the test ball head ( 1 ) are provided on both sides threaded holes ( 9 ), can be fixed over the simple way the optimal length. At the open side of the test ball head ( 1 ) is circular around the cone guide ( 4 ) another position scale ( 7 ) for the determination of the end position of the CCD angle and the torsion of the endoprosthesis.

Claims (6)

Vorrichtung zum Ermitteln der Endpositionen beim Implantieren von Endoprothesen, insbesondere für die intraoperative Ermittlung und Feinkorrektur der Halslänge auch beim Austauschen von Teilen eines Hüftendoprothesensystems, dadurch gekennzeichnet, dass in einem Probekugelkopf ein verschiebbarer Konus angeordnet ist.Device for determining the end positions when implanting endoprostheses, in particular for the intraoperative determination and fine correction of the neck length even when replacing parts of a Hüftendoprothesensystems, characterized in that a displaceable cone is arranged in a test ball head. Vorrichtung nach Anspruch 1 dadurch gekennzeichnet, dass die Verschiebung des Konus durch eine im Probekugelkopf eingebrachte Druckfeder bewirkt wird.Device according to claim 1, characterized that the displacement of the cone by a introduced in the sample ball head Compression spring is effected. Vorrichtung nach Anspruch 1 dadurch gekennzeichnet, dass auf dem verschiebbaren Konus eine Positionsskala mit einer Referenzteilung für die Bestimmung der Länge des Collum femoris angebracht ist.Device according to claim 1, characterized that on the sliding cone a position scale with a Reference division for the determination of the length of the collum femoris is attached. Vorrichtung nach Anspruch 1 und 3 dadurch gekennzeichnet, dass die Konusführung im Probekugelkopf vorteilhafterweise außermittig angeordnet ist.Device according to claims 1 and 3, characterized that the cone guide is advantageously arranged off-center in the test ball head. Vorrichtung nach Anspruch 1 dadurch gekennzeichnet, dass auf der offenen Seite des Probekugelkopfes, vorzugsweise kreisförmig um die Konusführung eine weitere Positionsskala für die Bestimmung der Endposition des CCD-Winkels und der Torsion der Endoprothese angeordnet ist.Device according to claim 1, characterized that on the open side of the sample ball head, preferably in a circle around the cone guide another position scale for the determination of the final position of the CCD angle and the torsion of the endoprosthesis is arranged. Vorrichtung nach Anspruch 1 bis 5 dadurch gekennzeichnet, dass der Probekugelkopf mindestens eine Stellfläche besitzt, die wiederum mindestens eine Feststelleinrichtung, beispielsweise eine Gewindeschraube, aufweist.Device according to claims 1 to 5, characterized that the test ball head has at least one footprint, which in turn at least one Locking device, such as a threaded screw having.
DE10335442A 2003-07-31 2003-07-31 Ball element temporarily used for determination of position of hip replacement unit, comprising adjustable components Withdrawn DE10335442A1 (en)

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US11291549B2 (en) 2019-12-11 2022-04-05 Depuy Ireland Unlimited Company Ceramic acetabular shell liners with augments
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WO2006136836A2 (en) * 2005-06-22 2006-12-28 Depuy International Limited Surgical instrument
WO2006136836A3 (en) * 2005-06-22 2007-03-29 Depuy Int Ltd Surgical instrument
EP1872745A3 (en) * 2006-06-30 2010-10-06 Howmedica Osteonics Corp. Femoral head resurfacing
US8152855B2 (en) 2006-11-03 2012-04-10 Howmedica Osteonics Corp. Method and apparatus for hip femoral resurfacing tooling
EP2047827A1 (en) * 2007-10-12 2009-04-15 Howmedica Osteonics Corp. Expandable reverse shoulder trail
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US8858641B2 (en) 2012-05-31 2014-10-14 Howmedica Osteonics Corp. Lateral entry insert for cup trial
US8663334B2 (en) 2012-05-31 2014-03-04 Howmedica Osteonics Corp. Lateral entry insert for cup trial
US8906102B2 (en) 2012-05-31 2014-12-09 Howmedica Osteonics Corp. Lateral entry insert for cup trial
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WO2014140636A1 (en) * 2013-03-15 2014-09-18 Depuy (Ireland) Implant trialling
CN105592823A (en) * 2013-03-15 2016-05-18 德普伊(爱尔兰)有限公司 Implant Trialling
CN105431111A (en) * 2013-03-15 2016-03-23 德普伊(爱尔兰)有限公司 Implant trialing
US9724201B2 (en) 2015-06-30 2017-08-08 Depuy Ireland Unlimited Company Modular taper seal for orthopaedic prosthetic hip assembly
US10322003B2 (en) 2015-06-30 2019-06-18 Depuy Ireland Unlimited Company Modular taper seal and method for orthopaedic prosthetic hip assembly
US10390972B2 (en) 2016-01-15 2019-08-27 Howmedica Osteonics Corp. Humeral trial adaptor
US10111754B2 (en) 2016-09-30 2018-10-30 Depuy Ireland Unlimited Company Acetabular shell and liner system
US11376128B2 (en) 2018-12-31 2022-07-05 Depuy Ireland Unlimited Company Acetabular orthopaedic prosthesis and method
US11291549B2 (en) 2019-12-11 2022-04-05 Depuy Ireland Unlimited Company Ceramic acetabular shell liners with augments
US11628066B2 (en) 2019-12-11 2023-04-18 Depuy Ireland Unlimited Company Ceramic acetabular shell liner with a metal ring having a lead-in surface
CN112022455A (en) * 2020-08-27 2020-12-04 北京市春立正达医疗器械股份有限公司 Split type femoral head prosthesis test head

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