DE102004038281B3 - Femoral neck prosthesis for an artificial hip joint comprises an implantable shaft which is curved and has a proximal region with a polygonal cross-section and a distal region with a round cross-section - Google Patents

Femoral neck prosthesis for an artificial hip joint comprises an implantable shaft which is curved and has a proximal region with a polygonal cross-section and a distal region with a round cross-section

Info

Publication number
DE102004038281B3
DE102004038281B3 DE200410038281 DE102004038281A DE102004038281B3 DE 102004038281 B3 DE102004038281 B3 DE 102004038281B3 DE 200410038281 DE200410038281 DE 200410038281 DE 102004038281 A DE102004038281 A DE 102004038281A DE 102004038281 B3 DE102004038281 B3 DE 102004038281B3
Authority
DE
Germany
Prior art keywords
femoral neck
surface
shaft
lateral
section
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.)
Active
Application number
DE200410038281
Other languages
German (de)
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.)
SMITH & NEPHEW GMBH, DE
Original Assignee
ENDOPLANT 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 ENDOPLANT GMBH filed Critical ENDOPLANT GMBH
Priority to DE200410038281 priority Critical patent/DE102004038281B3/en
Priority claimed from ITMI20051524 external-priority patent/ITMI20051524A1/en
Application granted granted Critical
Publication of DE102004038281B3 publication Critical patent/DE102004038281B3/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/46Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4601Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
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    • A61F2/36Femoral heads ; Femoral endoprostheses
    • AHUMAN NECESSITIES
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    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
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    • A61F2/36Femoral heads ; Femoral endoprostheses
    • A61F2/3601Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices
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    • A61F2/00Filters 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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    • A61F2/30Joints
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    • A61F2002/30138Convex polygonal shapes
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    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
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    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331Connections 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
    • A61F2002/30332Conically- or frustoconically-shaped protrusion and recess
    • AHUMAN NECESSITIES
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    • A61F2/30Joints
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    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30474Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using an intermediate sleeve interposed between both prosthetic parts to be coupled
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    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30537Special structural features of bone or joint prostheses not otherwise provided for adjustable
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    • A61F2310/00395Coating or prosthesis-covering structure made of metals or of alloys
    • A61F2310/00419Other metals
    • A61F2310/00544Coating made of tantalum or Ta-based alloys
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00389The prosthesis being coated or covered with a particular material
    • A61F2310/00592Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
    • A61F2310/00796Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite

Abstract

Femoral neck prosthesis for an artificial hip joint comprises an implantable shaft (2) whose proximal end is connected via a straight or tilted sleeve to an adapter (1) for receiving an artificial head, where the shaft is curved, the proximal region (3) of the shaft has a polygonal cross-section and is coated and the distal region (4) has a round cross-section. Femoral neck prosthesis for an artificial hip joint comprises an implantable shaft (2) whose proximal end is connected via a straight or tilted sleeve to an adapter (1) for receiving an artificial head, where the shaft is curved, the proximal region (3) of the shaft has a polygonal cross-section and is coated and the distal region (4) has a round cross-section. The surfaces of the shaft in the proximal and distal regions have different medial curvature: the dorsal and ventral faces form a wedge; the round medial face (21) forms a mating surface for the calcar femoris; the lateral face has a greater radius of curvature then the medial face; and the distal tip (5) is displaced laterally from the mid-axis to lie against the lateral calcar.

Description

  • Die Erfindung betrifft eine Schenkelhalsprothese mit den Merkmalen des Oberbegriffs des Anspruches 1. The invention relates to a femoral neck prosthesis having the features of the preamble of claim 1.
  • Es ist bekannt, dass Schäfte von Schenkelhalsprothesen blattartig oder rund sind, um diese im Inneren des Oberschenkelhalsknochens einzubringen und zu verankern. It is known that shafts of femoral neck prostheses are leaf-like or round, to bring these inside the femur and anchor.
  • Aus der From the DE 2517702 A1 DE 2517702 A1 ist bekannt, dass der Schaft der Prothese an mindestens zwei Seiten längliche Vertiefungen besitzt, die in der Längsausdehnung von 90° abweichende Winkel mit der allgemeinen Schaftachse bilden und dass diese von 90° abweichenden Winkel auf den mindestens zwei Seiten umgekehrte Vorzeichen aufweisen. it is known that the stem of the prosthesis has longitudinal grooves on at least two sides, which form in the longitudinal extension of 90 ° deviating angle with the general shank axis and that they have opposite signs different from 90 ° angle to the at least two sides. Werden Drehkräfte auf die Prothese ausgeübt, dann besteht die Gefahr, dass die Lagestabilität nicht ausreichend gegeben ist. Are rotational forces exerted on the prosthesis, there is a risk that the positional stability is not sufficient given.
  • Aus der From the DE 197 20 493 C1 DE 197 20 493 C1 ist eine Schenkelhalsendoprothese bekannt, die in den oberen Bereich eines Femurs zementlos eingesetzt wird. discloses a femoral neck, which is used without cement in the upper region of a femur. Ihr Stiel ist dabei in der Achse des Gelenkkopfes, nur das Stielende ist nach caudal gebogen. Its stem is in the axis of the joint head, only the stem end bent in caudal direction. Die Oberfläche besitzt zur besseren Verankerung im Knochen eine dreidimensionale Raumnetzstruktur. The surface has a three-dimensional network structure for better anchoring in the bone. Die Krafteinleitung in den Femur ist in Abhängigkeit von der notwendigen Resektion von natürlichem Knochenmaterial zum Teil nicht ausreichend, da medial die Anlage am Kalkar femoris zur Aufnahme der Kräfte gering ist. The introduction of force in the femur is a function of the required resection of natural bone material part not sufficient because the medial facility at calcar femoris for absorbing the forces is low.
  • Aus der WO 81/01510 A1 ist eine Hüftprothese bekannt, deren Schaft proximal zum Endpunkt gebogen ist. From WO 81/01510 A1 a hip prosthesis is known, the shaft of which is bent proximal end point. Der Schaft weist dabei zum Kopf hin verstärkt eine rechteckige und zum Endpunkt eine fast quadratische Form auf, wobei die Ecken leicht abgerundet sind. The shaft has in this case to the head amplifies a rectangular and the end point of an almost square shape, wherein the corners are slightly rounded. Aufgrund der Form soll die mechanische Beanspruchung am Knochenhals verringert sein. Because of the shape, the mechanical stress should be reduced to the bone neck. Eine flächige Anlage an die Kortikalis ist nicht gegeben. A face contact on the cortical bone is not given.
  • Auch aus der Also from the DE 38 19 948 C2 DE 38 19 948 C2 ist eine Hüftgelenk-Endoprothese bekannt, die sich zum distalen Ende hin verjüngt, wobei der Querschnitt des Schaftes im Bereich der proximalen Schafthälfte dorsal und ventral durch je einen Geradeabschnitt begrenzt ist, dessen Verlängerung die Medial-Lateral-Ebene unter einem spitzen Winkel schneidet. discloses a hip-joint endoprosthesis, which tapers towards the distal end, wherein the cross section of the shaft in the region of the proximal stem half dorsal and ventral limited by a respective straight portion whose extension intersects the medial-lateral plane at an acute angle. Zur besseren zementlosen Verankerung besitzt der Schaft Längsnuten im dorsalen und ventralen Oberflächenabschnitt, die einen gegen lateral gerichteten spitzen Winkel bilden. For better cementless anchoring of the shank has longitudinal grooves in the dorsal and ventral surface portion forming a laterally directed against acute angle. Bei dieser Prothese wird zwar die Haftung am Knochen verbessert, jedoch werden die Kräfte für eine gleichmäßige Abstützung in einem nicht ausreichendem Maße verteilt. In this prosthesis although the adhesion is improved to the bone, but the forces for a uniform support in an adequately distributed.
  • In der In the DE 298 05 344 U1 DE 298 05 344 U1 und WO 00/59410 A2 sind langstielige Geradschaftprothesen beschrieben. and WO 00/59410 A2 long-stemmed straight stem are described. Diese Prothesen zeichnen sich dadurch aus, dass sie einmal in den Eckbereichen so genannte Eckwülste für ein besseres „formfit" aufweisen und zum anderen innerhalb der Flächen des Geradschaftes konische Erweiterungen für eine bessere Verklemmung angeordnet sind. Nachteilig ist hier, dass durch diese Veränderungen keine bessere Abstützung der Prothesen an dem Knochen erreicht wird. These prostheses are characterized in that they exhibit even in the corner areas of so-called Eckwülste for a better "FormFit" and conical extensions for a better clamping are disposed to the other within the surfaces of the straight stem. A disadvantage here is that no better by these changes support of the prosthesis is achieved to the bone.
  • In der In the DE 101 54 970 B4 DE 101 54 970 B4 wird eine Kurzschaftprothese beschrieben. a short-stem prosthesis will be described. Sie ist aber ausschließlich für einen Einsatz mittels Knochenzement konzipiert. But it is designed exclusively for use by means of bone cement. Dieses zeigt sich dadurch, da ein Kragen angeordnet ist zur Anlage an den Knochen. This shows the fact that a collar is arranged to bear against the bone. Nachteilig ist hier, dass beim Einsatz auch hier wesentlich mehr Knochensubstanz entfernt werden muss und eine Ablastung erst mit dem Abbinden des Knochenzements erfolgt. The disadvantage here is that when using substantially more bone must be removed again and been downsized made only with the setting of the bone cement.
  • Aufgabe der Erfindung ist es deshalb eine Schenkelhalsprothese so weiter zu bilden, dass die Abstützung im Calcarbereich sowie die harmonische Krafteinleitung verbessert werden. The object of the invention is therefore to provide a femoral neck prosthesis so that the support in the calcar and the harmonic force introduction can be improved.
  • Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale des Anspruchs 1. Weiter vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen. This object is achieved by the characterizing features of claim 1. Further advantageous embodiments follow from the dependent claims.
  • Erfindungsgemäß ist demnach vorgesehen, dass der Schaft der Schenkelhalsprothese der Krümmung des Calcarbereiches folgt in der Form eines Polynoms. According to the invention, therefore, that the shaft of the femoral neck prosthesis of the curvature of the Calcarbereiches follows in the form of a polynomial.
  • Die Vorteile liegen insbesondere darin, dass durch die erfindungsgemäße Form des Schaftes durch die mediale Krümmung in Form eines Polynoms eine lang gestreckte Abstützung im Calcarbereich sowie eine harmonische Krafteinleitung in den Schenkelhalsknochen erfolgt. The advantages are in particular that due to the inventive shape of the stem through the medial curvature in the form of a polynomial is performed an elongate support in the calcar and a harmonic force introduction into the femoral neck bone.
  • Ein weiterer Vorteil ist, dass durch den keilförmigen Schaft in allen drei Ebenen im Falle eines Nachsetzens wieder inniger Implantat-Knochenkontakt vorhanden ist. A further advantage is that intimate implant-bone contact is available again by the wedge-shaped shank in all three planes in the case of Nachsetzens.
  • Durch den erfindungsgemäßen Querschnitt des Schaftes der Schenkelhalsprothese ist es gelungen, dass die Kräfte, die in Varus-Richtung wirken, über eine große Fläche wirken, so dass Spitzenbelastungen an einzelnen Abschnitten vermieden werden. The inventive cross-section of the stem of the femoral neck prosthesis has managed that the forces acting in varus direction, acting over a large area, so that peak loads on individual sections are avoided.
  • Dazu erfolgt zuerst die Abstimmung der Größenverhältnisse in der anterior-posterior (a. -p.)Ebene und in der axialen Ebene so, dass eine 3-Punkt-Abstützung in zwei Ebenen gewährleistet wird. For this purpose, the tuning of the size ratios in the anterior-posterior (a. P.) Plane and in the axial plane is first made so that a 3-point support is ensured in two planes.
  • Erfindungsgemäß erfolgt nach dem Einsetzen der Prothese eine Anlage des Schaftes am Calcar femoris und gleichzeitig eine Anlage der Prothesenspitze an der lateralen Kortikales. According to the invention after insertion of the prosthesis at the same time abutment of the tip of the prosthesis on the lateral cortices a plant of the stem on the femoral calcar and.
  • Durch die erfindungsgemäße Form entstehen außerdem eine Verklemmung im ventro/dorsalen Bereich sowie eine Abstützung der Prothesenspitze im Bereich der Femurkortikales. The inventive mold also a jam in the ventro / dorsal area and a support of the tip of the prosthesis in the field of Femurkortikales arise.
  • Dazu weist die erfindungsgemäße Schenkelhalsprothese einen Schaft auf, deren proximaler Bereich keilförmig ist, wobei die Schaftoberfläche im proximalen und distalen Bereich unterschiedlich stark nach medial gebogen ist. For this purpose, the femoral neck prosthesis according to the invention on a shaft whose proximal portion is wedge-shaped, the stem surface varies greatly bent in the proximal and distal region medially.
  • Der proximale Bereich weist lateral einen kleineren Krümmungsradius auf als der im distalen Bereich. The proximal region has a lateral radius of curvature smaller than the in the distal region. Durch diese Krümmungsänderung wird erreicht, dass im distalen Bereich eine Anlage und Abstützung der Prothesenspitze an der lateralen Kortikales erfolgt. By this curvature change is achieved that in the distal region takes place a plant and supporting the tip of the prosthesis on the lateral cortex.
  • Im Unterschied zur Oberfläche lateral ist der Krümmungradius medial kleiner, wobei der Krümmungsradius im distalen Bereich noch kleiner ist. In contrast to the lateral surface of the radius of curvature is medial smaller, the radius of curvature in the distal area is even smaller. Da die distale Spitze des Schaftes außerhalb der Mittelachse nach lateral verschoben ist, erfolgt in diesem distalen Bereich medial keine oder nur eine unwesentliche Abstützung: Es erfolgt jedoch eine flächenmäßige Anlage am Kalkar femoris. As the distal tip of the shaft is displaced outside the center axis laterally, is performed in this distal region medial only an insignificant or no support: It, however, takes place at the calcar femoris areal system.
  • Erfindungsgemäß weist der proximale Bereich des Schaftes eine Keilform mit mehreren Flächen auf, während der distale Bereich rundflächig ist. According to the invention the proximal portion of the shaft a wedge shape with a plurality of surfaces, while the distal portion is approximately planar.
  • Vorteilhaft ist es, wenn die dorsale Fläche und die ventrale Fläche des Schaftes so angeordnet sind, dass ihre Ebenen in Richtung medial einen spitzen Winkel bilden. , when the posterior surface and the anterior surface of the shaft are arranged so that their planes medial form an acute angle in direction is advantageous. Bevorzugt wird ein Winkel von 5° bis 40°, wobei sich gezeigt hat, dass ein Winkel von 15° bis 25° am geeignesten ist. an angle of 5 ° to 40 ° is preferred, wherein has been found that an angle of 15 ° to 25 ° is most suitably.
  • Den Abschluss des Schaftes medial bildet eine gewölbte Fläche, an der die dorsale ebene Fläche und die ventrale ebene Fläche anschließen. The closure of the shaft medial forms a curved surface on which connect the posterior flat surface and the anterior flat surface. Durch die gewölbte Fläche und der Krümmung der Oberfläche ist eine maximale Anlage am Calcar femoris gegeben. The curved surface and the curvature of the surface at the maximum system calcar femoris is given.
  • Erfindungsgemäß ist die Fläche lateral eben. According to the invention the lateral surface is flat. Es hat sich aber gezeigt, dass eine Dreiteilung dieser Fläche bevorzugt wird, damit im Zusammenwirken mit der dorsalen Fläche und der ventralen Fläche eine verstärkte Keilwirkung entsteht und in allen drei Ebenen ein inniger Implantat-Knochenkontakt vorhanden ist, damit die Kräfte in Varus-Richtung über eine große Fläche eingeleitet werden. It has been shown that a tripartite division of this surface is preferred so that an increased wedge effect is produced in cooperation with the dorsal surface and the ventral surface and in all three planes intimate implant-bone contact is present, so that the forces in varus direction over a large area can be initiated.
  • Bei der erfindungsgemäßen dreigeteilten lateralen Seitenfläche ist ein Teil in Richtung dorsal und ein Teil in Richtung ventral abgewinkelt. In the inventive three-part lateral side surface part towards the dorsal part and is angled in ventral direction. Der Winkel beträgt dabei bis 45°, vorzugsweise jedoch 25° bis 35°, wobei die Winkel möglichst gleich groß sind. The angle of up to 45 °, but preferably 25 ° to 35 °, where the angles are equal in size as possible. Die proximalen Kanten der einzelnen Flächen an der lateralen Seite sind bevorzugt annähernd gleich lang. The proximal edges of the individual surfaces at the lateral side are preferably approximately equal in length. Die lateral-dorsale Fläche und die lateral-ventrale Fläche sind in der Breite in distaler Richtung bevorzugt gleich und annähernd unverändert breit, während die mittlere laterale Fläche an der proximalen Kante am breitesten ist und in Richtung distal in der Breite abnimmt. The lateral-posterior surface and the lateral-anterior surface are preferably equal and approximately unchanged wide in width in the distal direction, while the average lateral surface is at breitesten at the proximal edge and distal decreases in the direction of width.
  • Bedingt durch die erfindungsgemäße Form erfolgt eine Verklemmung des Schaftes im ventro/dorsalem Bereich sowie eine Abstützung der Prothese im Bereich der dorsalen Femurkortikales. Due to the inventive shape takes place jamming of the shaft in the ventro / dorsal area and a support area of ​​the prosthesis in the dorsal Femurkortikales.
  • Die erfindungsgemäße Schenkelhalsprothese sollte aus einem Material mit guter Biokompatibilität bestehen. The femoral neck prosthesis according to the invention should consist of a material with good biocompatibility. Aber auch andere implantierbare Materialien sind möglich. But other implantable materials are possible. Die Oberflächen dieser Schenkelhalsprothesen können sein Titan-Niob-Beschichtungen, Reinsttitan-Plasmabeschichtungen mit extra rauer Oberflächenstruktur, Tantal-Beschichtung oder mit Hydroxyl-Apatidbeschichtung, die besonders gewebeverträglich sind. The surfaces of these femoral neck prosthesis may be titanium-niobium coatings Reinsttitan plasma coatings with extra rough surface structure, tantalum coating, or with hydroxyl Apatidbeschichtung which are particularly tissue compatible.
  • Als besonders vorteilhaft hat sich erwiesen, wenn der keilförmige proximale Bereich zumindest teilweise eine Titan-Plasma Beschichtung erhält, die mit einer Calciumphospat Beschichtung kombiniert wurde. As has proven particularly advantageous if the wedge-shaped proximal portion at least partially a titanium plasma coating is obtained, which was combined with a calcium phosphate coating. Die Ausführung der Schenkelhalsprothese lässt aber auch generell unbeschichtete oder anders beschichtete Oberflächen zu. but the execution of the femoral neck prosthesis can also generally be uncoated or differently coated surfaces.
  • Damit ein optimaler Sitz und Halt der erfindungsgemäßen Schenkelhalsprothese möglich ist, erfolgt nach Resektion des Schenkelhalses eine Bearbeitung des Knochens zuerst mit einer Raspel, wobei ein stufenweises Aufraspeln beginnt. For an optimum fit and hold the femoral neck prosthesis according to the invention is possible a processing of the bone occurs after resection of the femoral neck first with a rasp, with a gradual Aufraspeln starts. Nach dem Aufraspeln wird der Verdichter für die Spongiosa eingebracht. After Aufraspeln the compressor for the cancellous bone is inserted. Der Schaft des Verdichters hat vorzugsweise die gleiche äußere Form, wie der Schaft der erfindungsgemäßen Schenkelhalsprothese. The shaft of the compressor is preferably of the same outer shape as the stem of the femoral neck prosthesis according to the invention. Er unterscheidet sich insbesondere dadurch, dass in dem keilförmigen Bereich mindestens eine schraubenlinienförmige Nut angeordnet ist. In particular in that at least one helical groove is disposed in the wedge-shaped area, it differs. Die Steigung der Nut ist dabei vorzugsweise so groß, dass Nutbreite und Nutabstand annähernd gleich groß sind. The pitch of the groove is preferably so large that groove width and groove pitch are approximately the same size.
  • Weitere Vorteile, Einzelheiten und ergeben sich beispielhaft aus den nachfolgenden näheren Erläuterungen der Erfindung anhand der beigefügten Zeichnungen. Further advantages, details and resulting way of example from the following detailed explanation of the invention with reference to the accompanying drawings.
  • Es zeigen: Show it:
  • 1 1 Dorsale Seitenansicht der Schenkelhalsprothese mit starrem und winkelfestem Adapter Dorsal side view of the femoral neck prosthesis with rigid and solid angle adapter
  • 2 2 Laterale Seitenansicht der Schenkelhalsprothese mit starrem und winkelfestem Adapter Lateral side view of the femoral neck prosthesis with rigid and solid angle adapter
  • 3 3 Mediale Seitenansicht der Schenkelhalsprothese mit starrem und winkelfestem Adapter Medial side view of the femoral neck prosthesis with rigid and solid angle adapter
  • 4 4 Distale Ansicht auf die Schenkelhalsprothese mit starrem und winkelfestem Adapter Distal view of the femoral neck prosthesis with rigid and solid angle adapter
  • 5 5 Proximale Ansicht auf die Schenkelhalsprothese mit starrem und winkelfestem Adapter Proximal view of the femoral neck prosthesis with rigid and solid angle adapter
  • 6a 6a , b Dorsale Seitenansichten der Schenkelhalsprothese mit unterschiedlich eingestellter Schwenkhülse für den Winkel des Adapters B dorsal side views of the femoral neck prosthesis having differently adjusted pivot sleeve for the angle of the adapter
  • 7 7 Verdichter in der Seitenansicht Compressor in side view
  • Nachfolgend sind dieselben Teile mit gleichen Bezugszeichen versehen. Subsequently, the same parts are provided with the same reference numerals.
  • Nach To 1 1 besteht die Schenkelhalsprothese aus einem Schaft is the femoral neck prosthesis of a shaft 2 2 , der in einen proximalen Bereich , In a proximal region of the 3 3 und einen distalen Bereich and a distal portion 4 4 unterteilt ist. is divided. Das Verhältnis der beiden Bereiche zueinander ist in diesem Beispiel zwei zu eins. The ratio of the two areas to each other is on one in this example, two. Es kann aber auch davon abweichen. but it can also vary. Am proximalen Ende At the proximal end 9 9 des Schaftes of the shaft 2 2 befindet sich ein starrer und winkelfester Adapter There is a rigid and fixed angle adapter 1 1 für die Aufnahme einer Gelenkkugel. for receiving a joint ball. Die Krümmungsradien des Schaftes The radii of curvature of the shaft 2 2 sind lateral laterally 8 8th und medial and medially 6 6 unterschiedlich. differently. Im proximalen Bereich In the proximal region 3 3 ist der Krümmungsradius in lateraler Richtung is the radius of curvature in the lateral direction 8 8th kleiner als der Krümmungsradius im distalen Bereich smaller than the radius of curvature in the distal region 4 4 . , Der Schaft the shaft 2 2 ist nach medial is medially 6 6 gebogen. bent. Dabei ist der Krümmungsradius im proximalen Bereich In this case, the radius of curvature in the proximal region 3 3 medial medial 6 6 kleiner als lateral B. Im distalen Bereich less than laterally as in the distal region 4 4 ist der Krümmungsradius medial the radius of curvature is medial 6 6 wesentlich kleiner. much smaller. Die distale Spitze The distal tip 5 5 ist außerhalb der nicht dargestellten Mittelachse nach lateral is outside the unillustrated central axis laterally 8 8th verschoben. postponed. Zu erkennen in der To recognize 1 1 ist ebenfalls die dorsale Fläche is also the dorsal surface 11 11 , die dorsal-laterale Fläche The dorsal-lateral area 14 14 mit der annähernd konstanten Breite sowie ein Teil der bogenförmigen medialen Fläche with approximately constant width, and a part of the arc-shaped medial surface 21 21 im proximalen Bereich in the proximal region 3 3 . ,
  • In der In the 2 2 ist dargestellt, die Schenkelhalsprothese mit Adapter is shown, the femoral neck prosthesis with Adapter 1 1 und der dorsalen Spitze and the dorsal tip 5 5 . , Aufgrund der Ansicht aus lateraler Richtung ist im proximalen Bereich Due to the view from the lateral direction is in the proximal region 3 3 die laterale Flächengestaltung gut zu erkennen. to recognize the lateral surface design well. Mittig ist die laterale Fläche Center is the lateral surface 13 13 , die sich in Richtung distal Extending distally towards 10 10 verjüngt, zu erkennen. tapers to recognize. An den Seiten der lateralen Fläche On the sides of the lateral surface 13 13 ist die abgewinkelte dorsal-laterale Fläche the dorsal-lateral area angled 14 14 und die ventrallaterale Fläche and the surface ventrallaterale 15 15 sowie die proximale Kante and the proximal edge 16 16 zu erkennen. to recognize.
  • In der In the 3 3 ist besonders ersichtlich die bogenförmige mediale Fläche is particularly visible the arcuate medial surface 21 21 und die sich seitlich anschließende dorsale Fläche and the laterally subsequent dorsal surface 11 11 und die ventrale Fläche and the ventral surface 12 12 . ,
  • In den In the 4 4 und and 5 5 ist die Lage der einzelnen Flächen zueinander dargestellt. the position of each area is shown another. So ist der Winkel α Thus, the angle α 17 17 zwischen der dorsalen Fläche between the dorsal surface 11 11 und der ventralen Fläche and the ventral surface 12 12 zu erkennen. to recognize. In der In the 5 5 ist dagegen der laterale Bereich aus der proximalen Richtung gut zu erkennen. however, is clearly visible, the lateral area of ​​the proximal direction. Die an beiden Seiten der lateralen Fläche The lateral surface on both sides 13 13 anschließenden Flächen haben, wie aus dem Verlauf der zweifach abgewinkelten proximale Kante have adjoining surfaces as seen from the profile of the doubly angled proximal edge 16 16 ersichtlich ist, den gleichen Winkel β It can be seen β the same angle 18 18 , in Richtung medial. , In medial direction.
  • In den In the 6a 6a und and 6b 6b ist eine Schenkelhalsprothese mit Schwenkhülse is a femoral neck prosthesis having pivot sleeve 23 23 zwischen dem Schaft between the shaft 2 2 und dem Adapter and the adapter 1 1 dargestellt. shown. Die The 6a 6a und and 6b 6b unterscheiden sich nur dadurch, dass die Schwenkhülse only in that the pivoting sleeve differ 23 23 in der in the 6a 6a eine andere Stellung hat als in der has a different position than in the 6b 6b . , Bedingt dadurch ist der Anstellwinkel des Adapters Due to the fact the angle of attack of the adapter 1 1 zur Aufnahme einer nicht dargestellten Gelenkkugel gegenüber dem Schaft for receiving a joint ball, not shown, relative to the shaft 2 2 unterschiedlich. differently.
  • Aus der From the 7 7 ist die Form des Schaftes is the shape of the stem 2 2 des Verdichters zu erkennen. to recognize the compressor. Der proximale Bereich The proximal region 3 3 weist eine schraubenlinienförmig umlaufende Nut has a helical circumferential groove 19 19 auf. on. Die Steigung der Nut The pitch of the groove 19 19 ist dabei vorzugsweise so groß, dass die Nutbreite is preferably such that the groove width 22 22 und der Nutabstand and the groove pitch 20 20 annähernd gleich groß sind. are approximately equal.
  • 1 1
    Adapter adapter
    2 2
    Schaft shaft
    3 3
    proximaler Bereich proximal region
    4 4
    distaler Bereich distal region
    5 5
    Spitze top
    6 6
    medial medial
    7 7
    dorsal dorsal
    8 8th
    lateral laterally
    9 9
    proximal proximally
    10 10
    distal distally
    11 11
    dorsale Fläche dorsal surface
    12 12
    ventrale Fläche ventral surface
    13 13
    laterale Fläche lateral surface
    14 14
    dorsal-laterale Fläche dorsal-lateral area
    15 15
    ventral-laterale Fläche ventral-lateral surface
    16 16
    proximale Kante proximal edge
    17 17
    Winkel α angle α
    18 18
    Winkel β angle β
    19 19
    Nut groove
    20 20
    Nutabstand groove pitch
    21 21
    mediale Fläche medial surface
    22 22
    Nutbreite groove width
    23 23
    Gelenkhülse joint sleeve

Claims (10)

  1. Schenkelhalsprothese für ein künstliches Hüftgelenk aufweisend einen implantierbaren Schaft ( A femoral neck prosthesis for an artificial hip joint comprising an implantable stem ( 2 2 ) mit deren proximalen Ende über eine Geradhülse oder Schwenkhülse ( ) With its proximal end (or via a pivot sleeve Geradhülse 23 23 ) ein Adapter ( ), An adapter ( 1 1 ) zur Aufnahme einer künstlichen Gelenkkugel verbindbar ist und der Schaft ( ) Is connected to receive an artificial joint ball and the shaft ( 2 2 ) gebogen ist, wobei der proximale Bereich ( ) Is bent, wherein the proximal region ( 3 3 ) im Querschnitt die Form eines Polygon aufweist und zumindest teilweise beschichtet ist, und der distale Bereich ( ) In cross section has the shape of a polygon, and is at least partially coated, and the distal region ( 4 4 ) im Querschnitt rundflächig ist, dadurch gekennzeichnet , dass die Schaftoberfläche im proximalen und distalen Bereich unterschiedlich nach medial gekrümmt ist, wobei – die dorsale Fläche ( ) Is round in cross-section area, characterized in that the shaft surface is curved in the proximal and distal regions different medially, wherein - the dorsal surface ( 11 11 ) und die ventrale Fläche ( ) And the ventral surface ( 12 12 ) gegeneinander eine Keilform als Klemmflächen bilden, – die runde mediale Fläche ( ) Against each other forming a wedge shape as the clamping surfaces, - the rounded medial surface ( 21 21 ) als Anlagefläche am Kalkar femoris ausgebildet ist, – die laterale Fläche ( ) Is formed as a bearing surface on the calcar femoris, - the lateral surface ( 13 13 ) einen größeren Krümmungsradius aufweist als die mediale Fläche ( ) Has a larger radius of curvature (than the medial surface 21 21 ) und – die distale Spitze ( ), And - the distal tip ( 5 5 ) außerhalb der Mittelachse nach lateral ( ) Outside the central axis to the lateral ( 8 8th ) verschoben ist und am Kalkar lateral liegend ist. ) Is moved laterally and is lying at Kalkar.
  2. Schenkelhalsprothese nach Anspruch 1, dadurch gekennzeichnet, dass die laterale Fläche ( A femoral neck prosthesis according to claim 1, characterized in that the lateral surface ( 13 13 ) teilweise in eine dorsallaterale Fläche ( ) Partially (in a surface dorsallaterale 14 14 ) und eine ventral-laterale Fläche ( ) And a ventral-lateral surface ( 15 15 ) flächenhaft abgewinkelt ist. ) Is angled-dimensionally.
  3. Schenkelhalsprothese nach Anspruch 2, dadurch gekennzeichnet, dass die dorsal-laterale Fläche ( A femoral neck prosthesis according to claim 2, characterized in that the dorsal-lateral area ( 14 14 ) und die vertral-laterale Fläche ( ) And the vertral-lateral surface ( 15 15 ) gleich breit sind. ) Are the same width.
  4. Schenkelhalsprothese nach Anspruch 2, dadurch gekennzeichnet, dass die dorsal-laterale Fläche ( A femoral neck prosthesis according to claim 2, characterized in that the dorsal-lateral area ( 14 14 ) und die ventral-laterale Fläche ( ) And the ventral-lateral surface ( 15 15 ) von der proximalen Kante ( ) (Of the proximal edge 16 16 ) bis zum distalen Bereich ( ) To the distal region ( 4 4 ) annähernd gleich breit sind. ) Are approximately the same width.
  5. Schenkelhalsprothese nach Anspruch 2, dadurch gekennzeichnet, dass die dorsal-laterale Fläche ( A femoral neck prosthesis according to claim 2, characterized in that the dorsal-lateral area ( 14 14 ) und die ventral-laterale Fläche ( ) And the ventral-lateral surface ( 15 15 ) in Richtung medial abgewinkelt sind und gegenüber der lateralen Fläche ( ) Are angled in the medial direction and (opposite the lateral surface 13 13 ) einen Winkel von 1° < β < 45° aufweisen. ) Have an angle of 1 ° <β <45 °.
  6. Schenkelhalsprothese nach Anspruch 1, dadurch gekennzeichnet, dass die dorsale Fläche ( A femoral neck prosthesis according to claim 1, characterized in that the dorsal face ( 11 11 ) und ventrale Fläche ( ) And ventral surface ( 12 12 ) sich in einem spitzen Winkel 5° < α < 45° ( ) Extends (at an acute angle 5 ° <α <45 ° 17 17 ) in Richtung medial ( ) Medially (towards 6 6 ) schneiden. ) to cut.
  7. Schenkelhalsprothese nach Anspruch 1, dadurch gekennzeichnet, dass der Schaft lateral im proximalen Bereich ( A femoral neck prosthesis according to claim 1, characterized in that the shank laterally (in the proximal region 3 3 ) einen kleineren Krümmungsradius aufweist als im distalen Bereich ( ) Has a smaller radius of curvature than in the distal region ( 4 4 ). ).
  8. Schenkelhalsprothese nach Anspruch 1, dadurch gekennzeichnet, dass der Schaft medial im distalen Bereich ( A femoral neck prosthesis according to claim 1, characterized in that the shaft medial (in the distal region 4 4 ) einen kleineren Krümmungsradius aufweist als lateral ( ) Has a smaller radius of curvature than lateral ( 4 4 ). ).
  9. Schenkelhalsprothese nach Anspruch 1, dadurch gekennzeichnet, dass die Prothese aus einem Material mit guter Biokompatibilität besteht. A femoral neck prosthesis according to claim 1, characterized in that the prosthesis is made of a material with good biocompatibility.
  10. Schenkelhalsprothese nach Anspruch 1, dadurch gekennzeichnet, dass der proximale Bereich ( A femoral neck prosthesis according to claim 1, characterized in that the proximal region ( 3 3 ) zumindest teilweise mit Calcium-Phosphat auf einer Titan-Plasma-Prothese versehen ist. ) Is at least partly provided on a titanium plasma prosthesis with calcium phosphate.
DE200410038281 2004-08-03 2004-08-03 Femoral neck prosthesis for an artificial hip joint comprises an implantable shaft which is curved and has a proximal region with a polygonal cross-section and a distal region with a round cross-section Active DE102004038281B3 (en)

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DE200410038281 DE102004038281B3 (en) 2004-08-03 2004-08-03 Femoral neck prosthesis for an artificial hip joint comprises an implantable shaft which is curved and has a proximal region with a polygonal cross-section and a distal region with a round cross-section
ITMI20051524 ITMI20051524A1 (en) 2004-08-03 2005-08-03 Prosthetic femoral neck

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008046734A1 (en) * 2006-10-19 2008-04-24 Jacques Valloton Endoprosthesis for a hip joint
WO2011023921A1 (en) * 2009-08-27 2011-03-03 Biomet Uk Limited A femoral neck prosthesis
US20150025648A1 (en) * 2007-02-16 2015-01-22 Concept, Design and Development, LLC. Tissue sparing implant
DE102014015371A1 (en) 2014-10-17 2016-04-21 Implan Tec Deutschland GmbH Set a number hip stem implants

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WO1981001510A1 (en) * 1979-11-26 1981-06-11 Rush Presbyterian St Luke Hip prosthesis
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DE19720493C1 (en) * 1997-05-16 1998-10-22 Eska Implants Gmbh & Co Femoral neck for a hip replacement
DE69129969T2 (en) * 1990-11-06 1998-12-24 Merck Biomaterial France Thigh part of a hip joint prosthesis
US5928289A (en) * 1996-02-08 1999-07-27 Deckner; Andregeorges Anchoring rod used particularly in prostheses
DE29805344U1 (en) * 1998-03-24 1999-08-12 Orto Maquet Gmbh & Co Kg Endoprosthesis with an anchoring stem
WO2000003664A1 (en) * 1998-07-17 2000-01-27 Martin Imhof Femur prosthesis
WO2000059410A2 (en) * 1999-04-07 2000-10-12 Plus Endoprothetik Ag Flat shaft of a hip joint prosthesis for anchoring in the femur
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EP1101460A1 (en) * 1999-11-17 2001-05-23 CITIEFFE S.r.l. Hip endoprosthesis
DE10045678C1 (en) * 2000-09-15 2002-02-14 Werner Scholz Hip joint prosthesis has a shaft with conical recess at proximal end and ball head with conical recess and has connecting part with conical pin to fit in ball head and has projection to fit in shaft
DE19940348C2 (en) * 1999-04-27 2003-04-30 Steinicke Maschinen Und Werkze Two-part endoprosthesis, in particular for a hip replacement
DE10154970B4 (en) * 2001-11-08 2004-01-08 Eska Implants Gmbh & Co. By means of bone cement to be implanted femoral neck for a hip replacement
EP1044664B1 (en) * 1999-04-13 2004-06-30 Plus Endoprothetik Ag Profile stem for anchoring a hip joint prosthesis in the femur
DE69728001T2 (en) * 1996-06-28 2005-03-03 Depuy Products, Inc., Warsaw Prosthesis with variable fitting and stress distribution

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2517702A1 (en) * 1975-04-22 1976-10-28 Friedrichsfeld Gmbh Hip joint prosthesis with stress dissipating design - made in high density alumina or glass (ceramic) coated metal
WO1981001510A1 (en) * 1979-11-26 1981-06-11 Rush Presbyterian St Luke Hip prosthesis
EP0257359B1 (en) * 1986-08-15 1991-11-27 Boehringer Mannheim Corporation Modular hip prosthesis
DE3822153A1 (en) * 1987-08-24 1989-03-09 Bristol Myers Co Femoral component for a hip prosthesis
DE3819948C2 (en) * 1988-06-11 1990-06-13 Orthoplant Endoprothetik Gmbh, 2800 Bremen, De
DE69129969T2 (en) * 1990-11-06 1998-12-24 Merck Biomaterial France Thigh part of a hip joint prosthesis
US5928289A (en) * 1996-02-08 1999-07-27 Deckner; Andregeorges Anchoring rod used particularly in prostheses
DE69728001T2 (en) * 1996-06-28 2005-03-03 Depuy Products, Inc., Warsaw Prosthesis with variable fitting and stress distribution
DE29701082U1 (en) * 1997-01-23 1998-05-28 Rueter Axel Prof Dr Femoral component for a hip prosthesis
DE19720493C1 (en) * 1997-05-16 1998-10-22 Eska Implants Gmbh & Co Femoral neck for a hip replacement
DE29805344U1 (en) * 1998-03-24 1999-08-12 Orto Maquet Gmbh & Co Kg Endoprosthesis with an anchoring stem
WO2000003664A1 (en) * 1998-07-17 2000-01-27 Martin Imhof Femur prosthesis
WO2000059410A2 (en) * 1999-04-07 2000-10-12 Plus Endoprothetik Ag Flat shaft of a hip joint prosthesis for anchoring in the femur
EP1044664B1 (en) * 1999-04-13 2004-06-30 Plus Endoprothetik Ag Profile stem for anchoring a hip joint prosthesis in the femur
DE19928791A1 (en) * 1999-04-13 2000-11-02 Plus Endoprothetik Ag Rotkreuz Leaf-like shaft of a hip joint prosthesis for anchoring in the femur
DE19940348C2 (en) * 1999-04-27 2003-04-30 Steinicke Maschinen Und Werkze Two-part endoprosthesis, in particular for a hip replacement
EP1101460A1 (en) * 1999-11-17 2001-05-23 CITIEFFE S.r.l. Hip endoprosthesis
DE10045678C1 (en) * 2000-09-15 2002-02-14 Werner Scholz Hip joint prosthesis has a shaft with conical recess at proximal end and ball head with conical recess and has connecting part with conical pin to fit in ball head and has projection to fit in shaft
DE10154970B4 (en) * 2001-11-08 2004-01-08 Eska Implants Gmbh & Co. By means of bone cement to be implanted femoral neck for a hip replacement

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008046734A1 (en) * 2006-10-19 2008-04-24 Jacques Valloton Endoprosthesis for a hip joint
US20150025648A1 (en) * 2007-02-16 2015-01-22 Concept, Design and Development, LLC. Tissue sparing implant
WO2011023921A1 (en) * 2009-08-27 2011-03-03 Biomet Uk Limited A femoral neck prosthesis
GB2473184B (en) * 2009-08-27 2014-09-03 Biomet Uk Ltd A femoral neck prosthesis
US9974656B2 (en) 2009-08-27 2018-05-22 Biomet Uk Limited Femoral neck prosthesis
DE102014015371A1 (en) 2014-10-17 2016-04-21 Implan Tec Deutschland GmbH Set a number hip stem implants

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