CH683669A5 - Hip socket with even distribution of bone cement - is formed from a hemisphere to give hollowing and structured cylinder section with sealing gap structure - Google Patents
Hip socket with even distribution of bone cement - is formed from a hemisphere to give hollowing and structured cylinder section with sealing gap structure Download PDFInfo
- Publication number
- CH683669A5 CH683669A5 CH146/91A CH14691A CH683669A5 CH 683669 A5 CH683669 A5 CH 683669A5 CH 146/91 A CH146/91 A CH 146/91A CH 14691 A CH14691 A CH 14691A CH 683669 A5 CH683669 A5 CH 683669A5
- Authority
- CH
- Switzerland
- Prior art keywords
- shell
- hip joint
- bone cement
- cavity
- hollowing
- Prior art date
Links
- 239000002639 bone cement Substances 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 title claims abstract description 6
- 239000004698 Polyethylene Substances 0.000 claims abstract description 6
- -1 polyethylene Polymers 0.000 claims abstract description 6
- 229920000573 polyethylene Polymers 0.000 claims abstract description 6
- 210000004394 hip joint Anatomy 0.000 claims description 25
- 210000000988 bone and bone Anatomy 0.000 claims description 9
- 238000003801 milling Methods 0.000 claims description 6
- 210000000588 acetabulum Anatomy 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000005484 gravity Effects 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 210000001624 hip Anatomy 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Classifications
-
- 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
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
-
- 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
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/3006—Properties of materials and coating materials
- A61F2002/3008—Properties of materials and coating materials radio-opaque, e.g. radio-opaque markers
-
- 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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/3082—Grooves
-
- 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
- A61F2/32—Joints for the hip
- A61F2002/3241—Joints for the hip having a ring, e.g. for locking the femoral head into the acetabular cup
-
- 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 for implanting artificial joints
- A61F2002/4631—Special tools for implanting artificial joints the prosthesis being specially adapted for being cemented
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
- A61F2250/0098—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers radio-opaque, e.g. radio-opaque markers
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
Description
1 1
CH 683 669 A5 CH 683 669 A5
2 2nd
Beschreibung description
Die Erfindung handelt von einer einzementierbaren Hüftgelenkschale bestehend aus einer Halbkugelschale aus Polyäthylen und versehen mit Ausnehmungen an ihrer Aussenfläche, um über aushärtenden Knochenzement eine Verankerung in einem durch sphärisches Auffräsen vorbereiteten Knochenbett im Acetabulum zu erreichen. The invention relates to a hip joint shell that can be cemented in, consisting of a hemispherical shell made of polyethylene and provided with recesses on its outer surface in order to achieve anchoring in a bone bed in the acetabulum prepared by spherical milling by means of hardening bone cement.
Einzementierbare Hüftgelenkschalen sind in den Patentschriften FR 7 234 894 und EP 0 105 098 gezeigt. Hüftgelenkschalen, die nicht im Knochengewebe vorverankert sind, werden, nachdem der Knochenzement in eine vorbereitete Knochenaushöhlung eingebracht wurde, in diese Knochenaushöhlung eingeschoben, um den Knochenzement zu verdrängen und in die Zwischenräume zwischen Hüftgelenkschale und Knochenaushöhlung zu zwingen. Die pasteuse Masse des Knochenzements setzt bei ihrer Verdrängung der eindringenden Hüftgelenkschale Widerstand entgegen, gegen den die vorgesehene Endlage der Schale erreicht werden muss, während die erreichte vorgesehene Endlage bis zum Ausharten vom Knochenzement gehalten werden muss. Hip joint cups that can be cemented are shown in the patent specifications FR 7 234 894 and EP 0 105 098. Hip cups that are not pre-anchored in the bone tissue, after the bone cement has been introduced into a prepared bone cavity, are inserted into this bone cavity in order to displace the bone cement and to force it into the spaces between the hip joint shell and the bone cavity. The pasteus mass of the bone cement, when displaced, opposes the penetrating hip joint shell, against which the intended end position of the shell must be reached, while the intended end position must be held until the bone cement has hardened.
Aufgabe der Erfindung ist es, dem Operateur die Fixierung der Hüftgelenkschale in der vorgesehenen Endlage zu erleichtern. Gemäss der Erfindung wird die Aufgabe dadurch gelöst, dass die sich durch das Auffräsen ergebende Aushöhlung aus einem Halbkugelanteil und einem daran anschliessenden Zylinderanteil gebildet ist, dass in der Endlage ein Dichtspalt von weniger als 1 mm pro Seite zwischen Schalenrand und Aushöhlung vorgesehen ist und dass sich der Spalt zwischen der Aussenfläche der Hüftgelenkschale (1) und dem Zylinderanteil der Aushöhlung vom Schalenrand weg in Richtung Pol stetig vergrössert. The object of the invention is to make it easier for the surgeon to fix the hip joint shell in the intended end position. According to the invention, the object is achieved in that the cavity resulting from the milling is formed from a hemisphere portion and an adjoining cylinder portion, that a sealing gap of less than 1 mm per side is provided between the shell edge and the cavity, and that the gap between the outer surface of the hip joint shell (1) and the cylinder portion of the cavity away from the edge of the shell in the direction of the pole increases continuously.
Die Vorteile der Erfindung sind darin zu sehen, dass eine mechanische Vorzentrierung der Hüftgelenkschale stattfindet, dass der Widerstand gegen das Einbringen bis zum Erreichen der vorgesehenen Endlage zunimmt und dass sich der verdrängte Knochenzement wegen des zum Schalenrand hin zunehmenden Strömungswiderstandes gleichmässig und in geringerer Abhängigkeit zur Schwerkraft zwischen Hüftgelenkschale und Aushöhlung verteilt und verdichtet. Die abhängigen Ansprüche 2 und 3 beziehen sich auf vorteilhafte Weiterbildungen der Erfindung. The advantages of the invention can be seen in the fact that the hip joint shell is mechanically precentered, that the resistance to insertion increases until the intended end position is reached, and that the displaced bone cement increases evenly due to the increasing flow resistance towards the edge of the shell and is less dependent on gravity distributed and compressed between the hip joint shell and the cavity. The dependent claims 2 and 3 relate to advantageous developments of the invention.
Im folgenden wird die Erfindung anhand von einem Ausführungsbeispiel beschrieben. Es zeigt: The invention is described below using an exemplary embodiment. It shows:
Fig. 1 schematisch einen Schnitt längs der Polachse durch eine implantierte Hüftgelenkschale; 1 schematically shows a section along the polar axis through an implanted hip joint shell;
Fig. 2 schematisch die Draufsicht auf eine Hüftgelenkschale gemäss Fig. 1 und Fig. 2 shows schematically the top view of a hip joint shell according to Fig. 1 and
Fig. 3 schematisch die Seitenansicht einer Hüftgelenkschale gemäss Fig. 1. 3 schematically shows the side view of a hip joint shell according to FIG. 1.
In den Figuren ist eine Hüftgelenkschale gezeigt, die aus einer Halbkugelschale aus Polyäthylen besteht und die mit Ausnehmungen an ihrer Aussenfläche versehen ist, um über aushärtenden Knochenzement eine Verankerung in einem durch sphärisches Auffräsen vorbereiteten Knochenbett im Acetabulum zu erreichen. Die sich durch das Auffräsen ergebende Aushöhlung wird aus einem Halbkugelanteil und einem daran anschliessenden Zylinderanteil gebildet. In der Endlage ist ein Dichtspalt von weniger als 1 mm pro Seite zwischen Schalen-rand und Aushöhlung vorgesehen. Der Spalt zwischen Hüftgelenkschale und dem Zylinderanteil der Aushöhlung vergrössert sich stetig vom Schalenrand weg in Richtung Pol. In the figures, a hip joint shell is shown which consists of a hemispherical shell made of polyethylene and which is provided with recesses on its outer surface in order to anchor it in a bone bed in the acetabulum prepared by spherical milling by means of hardening bone cement. The cavity resulting from the milling is formed from a hemisphere portion and a cylinder portion adjoining it. In the end position there is a sealing gap of less than 1 mm per side between the edge of the shell and the cavity. The gap between the hip joint shell and the cylinder portion of the cavity increases steadily away from the edge of the shell towards the pole.
In Fig. 1 ist eine Hüftgelenkschale 1 aus Polyäthylen mit einer halbkugelförmigen Innenfläche 18 von Innenradius 2 und mit einer von Quernuten 4 und Längsnuten 5 unterbrochenen Aussenfläche 3, die zur Verankerung im Knochenzement 7 dient, gezeigt. Der Schalenrand 6 ragt um eine Strecke 12 über den Äquator der Innenfläche 18 heraus. Die Aushöhlung 9 im Knochengewebe 8 besteht aus einem Halbkugelanteil 10 von Radius 21 und aus einem am Äquator 20 daran anschliessenden Zylinderanteil 11 mit einer Höhe in Richtung der Polachse 17, die mindestens der Strecke 12 entspricht. In der vorgesehenen Endlage haben der Halbkugelanteil 10 und die halbkugelförmige Innenfläche 18 einen gemeinsamen Mittelpunkt. In der vorgesehenen Endlage beträgt der Dichtspalt 19 zwischen Zylinderanteil 11 und dem Schalenrand 6 weniger als 1 mm pro Seite während sich der Spalt 22 im Bereich des Zylinderanteils 11 zur Aussenfläche 3 mit der Entfernung vom Schalenrand 6 in Richtung Pol 16 bis zu einer Tiefe im Betrag der Strecke 12 stetig vergrössert, dadurch dass die Aussenfläche 3 in diesem Bereich einem Konus mit dem halben Konuswinkel 15 folgt. Die Aussenfläche 3 ist durch eine umlaufende Kerbe 13 unterbrochen, in der ein Metalldraht 14 für spätere Lagekontrollen mittels Röntgen verstemmt ist. 1 shows a hip joint shell 1 made of polyethylene with a hemispherical inner surface 18 of inner radius 2 and with an outer surface 3 interrupted by transverse grooves 4 and longitudinal grooves 5, which serves for anchoring in the bone cement 7. The shell edge 6 protrudes a distance 12 beyond the equator of the inner surface 18. The cavity 9 in the bone tissue 8 consists of a hemisphere portion 10 of radius 21 and a cylinder portion 11 adjoining it at the equator 20 with a height in the direction of the polar axis 17 which corresponds at least to the distance 12. In the intended end position, the hemisphere portion 10 and the hemispherical inner surface 18 have a common center point. In the intended end position, the sealing gap 19 between the cylinder portion 11 and the shell edge 6 is less than 1 mm per side, while the gap 22 in the area of the cylinder portion 11 to the outer surface 3 increases with the distance from the shell edge 6 in the direction of pole 16 to a depth the distance 12 is continuously increased, in that the outer surface 3 follows a cone with half the cone angle 15 in this area. The outer surface 3 is interrupted by a circumferential notch 13, in which a metal wire 14 is caulked for later position checks by means of X-rays.
Vor dem Einsetzen der Hüftgelenkschale 1 wird die mit ihrer Öffnung im wesentlichen nach oben weisende Aushöhlung 9 mit einer Menge von noch verpressbarem Knochenzement 7 gefüllt, die zusätzlich zum Volumen, das in der Endlage zwischen Hüftgelenkschale 1 und Aushöhlung 9 gebildet wird, noch das Volumen des Zylinderanteils 11 enthält. Beim Einfahren der Hüftgelenkschale 1 wird der Knochenzement 7 verdrängt und bewegt sich zwischen Hüftgelenkschale 1 und Aushöhlung 9 nach aussen. Sobald nun der vom Schalenrand 6 auf eine Tiefe der Strecke 12 konische Bereich der Hüftgelenkschale in den Zylinderanteil 11 der Aushöhlung 9 eintaucht, entsteht für die Hüftgelenk-schale 1 eine ständig enger werdende Drosseistelle zwischen der Kante des Zylinderanteils 11 und dem konischen Bereich der Hüftgelenkschale. Der zum Auspressen notwendige Druck vor der Drosselstelle wächst und zwingt den Knochenzement in alle Aussparungen 4, 5 und in die Mikrostruktur der Oberflächen des Polyäthylens sowie in die natürlich vorhandenen Spongiosa-Öffnungen hinein und verdichtet ihn dort. Durch das starke Anwachsen der Drosselwirkung verringert sich die Eintauchgeschwindigkeit bei gegebener Einpresskraft und macht ein genaues Anfahren und Halten in der Endlage möglich. Ausserdem sind Korrekturen der Winkellage der Polachse 17, die durch einseitiges Before the hip joint shell 1 is inserted, the cavity 9, which essentially opens upwards, is filled with a quantity of still compressible bone cement 7, which in addition to the volume that is formed in the end position between the hip joint shell 1 and the cavity 9, also the volume of the Contains cylinder portion 11. When the hip joint shell 1 is retracted, the bone cement 7 is displaced and moves outwards between the hip joint shell 1 and the cavity 9. As soon as the area of the hip joint shell conical from the shell edge 6 to a depth of the distance 12 is immersed in the cylinder portion 11 of the cavity 9, the hip joint shell 1 has a constantly narrowing throttle point between the edge of the cylinder portion 11 and the conical region of the hip joint shell. The pressure required for pressing out in front of the throttle point increases and forces the bone cement into all the recesses 4, 5 and into the microstructure of the surfaces of the polyethylene and into the naturally existing cancellous bone openings, where it compresses it. Due to the strong increase in the throttling effect, the immersion speed is reduced for a given press-in force and enables precise starting and stopping in the end position. In addition, corrections to the angular position of the polar axis 17 by one-sided
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CH 683 669 A5 CH 683 669 A5
Drücken in axialer Richtung auf den Schalenrand 6 erfolgen, ohne wesentliche Vergrösserung der Eindringtiefe möglich. Pressing in the axial direction on the shell edge 6 takes place without a substantial increase in the penetration depth.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH146/91A CH683669A5 (en) | 1991-01-18 | 1991-01-18 | Hip socket with even distribution of bone cement - is formed from a hemisphere to give hollowing and structured cylinder section with sealing gap structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH146/91A CH683669A5 (en) | 1991-01-18 | 1991-01-18 | Hip socket with even distribution of bone cement - is formed from a hemisphere to give hollowing and structured cylinder section with sealing gap structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH683669A5 true CH683669A5 (en) | 1994-04-29 |
Family
ID=4180301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH146/91A CH683669A5 (en) | 1991-01-18 | 1991-01-18 | Hip socket with even distribution of bone cement - is formed from a hemisphere to give hollowing and structured cylinder section with sealing gap structure |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH683669A5 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4403994C1 (en) * | 1994-02-09 | 1995-10-26 | Norbert Dr Moos | Cementable hip joint socket |
| CN109528359A (en) * | 2018-10-26 | 2019-03-29 | 广州医科大学附属第医院 | A kind of liner for metal acetabulum |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2250279A5 (en) * | 1972-09-26 | 1975-05-30 | Deaux Ets | Artificial hip joint socket - has concentric external ribs parallel to rim and ribs perpendicular to rim |
| US4068324A (en) * | 1977-01-19 | 1978-01-17 | Bio-Dynamics Inc. | Platform supported hip prosthesis |
| EP0105098A1 (en) * | 1982-10-05 | 1984-04-11 | GebràDer Sulzer Aktiengesellschaft | Artificial acetabular cup |
| EP0120595A1 (en) * | 1983-02-23 | 1984-10-03 | Minnesota Mining And Manufacturing Company | Prosthetic acetabular cup |
| EP0336884A1 (en) * | 1988-03-29 | 1989-10-11 | GebràDer Sulzer Aktiengesellschaft | Reinforcement for a bed of bone cement |
-
1991
- 1991-01-18 CH CH146/91A patent/CH683669A5/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2250279A5 (en) * | 1972-09-26 | 1975-05-30 | Deaux Ets | Artificial hip joint socket - has concentric external ribs parallel to rim and ribs perpendicular to rim |
| US4068324A (en) * | 1977-01-19 | 1978-01-17 | Bio-Dynamics Inc. | Platform supported hip prosthesis |
| EP0105098A1 (en) * | 1982-10-05 | 1984-04-11 | GebràDer Sulzer Aktiengesellschaft | Artificial acetabular cup |
| EP0120595A1 (en) * | 1983-02-23 | 1984-10-03 | Minnesota Mining And Manufacturing Company | Prosthetic acetabular cup |
| EP0336884A1 (en) * | 1988-03-29 | 1989-10-11 | GebràDer Sulzer Aktiengesellschaft | Reinforcement for a bed of bone cement |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4403994C1 (en) * | 1994-02-09 | 1995-10-26 | Norbert Dr Moos | Cementable hip joint socket |
| CN109528359A (en) * | 2018-10-26 | 2019-03-29 | 广州医科大学附属第医院 | A kind of liner for metal acetabulum |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased | ||
| PL | Patent ceased |