WO2002030339A1 - Arrangement in a seal used for fixing a hip joint prosthesis - Google Patents

Arrangement in a seal used for fixing a hip joint prosthesis Download PDF

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Publication number
WO2002030339A1
WO2002030339A1 PCT/SE2000/001973 SE0001973W WO0230339A1 WO 2002030339 A1 WO2002030339 A1 WO 2002030339A1 SE 0001973 W SE0001973 W SE 0001973W WO 0230339 A1 WO0230339 A1 WO 0230339A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
designed
impression
bone cement
duct
Prior art date
Application number
PCT/SE2000/001973
Other languages
French (fr)
Inventor
Sören JONSSON
Original Assignee
Cemvac System Ab
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 Cemvac System Ab filed Critical Cemvac System Ab
Priority to PCT/SE2000/001973 priority Critical patent/WO2002030339A1/en
Priority to AU2001215626A priority patent/AU2001215626A1/en
Publication of WO2002030339A1 publication Critical patent/WO2002030339A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8802—Equipment for handling bone cement or other fluid fillers
    • A61B17/8805—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it
    • A61B17/8808—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it with sealing collar for bone cavity
    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4609—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4631—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor the prosthesis being specially adapted for being cemented

Definitions

  • the present invention relates to an arrangement according to the pre-characterising part of claim 1.
  • the object of the present invention is to produce an improved fixing of an acetabulum prosthesis. According to the invention this achieved by an arrangement which has the features specified in the characterising part of claim 1.
  • FIG. 1 shows a diagrammatic section through an arrangement according to the invention and figure lb shows a perspective view of the arrangement.
  • Figure 2 shows a diagram of the arrangement according to the invention in situ during dispensing of the bone cement.
  • the drawing 1 generally denotes a cushion-like seal made from an elastic, compressible, rubbery material.
  • the seal 1 which is substantially circular, has a thickness of approximately 10 mm and overall dimensions such that it properly covers the edge of the acetabulum socket, as will be clearly apparent from the following.
  • the seal 1 has a central through-duct 2, intended for inserting the nozzle 3a of a bone cement injection syringe 3 when the seal 1 is applied.
  • the seal has an annular flange la at the opening 2a of the duct 2, which when the seal 1 is applied is intended to face the acetabulum.
  • the seal 1 On the opposite side of the seal, that is to say the side on which the nozzle 3 a is intended to be inserted into the duct 2, the seal 1 has a tubular part lb, which constitutes an extension of the duct 2.
  • the seal 1 On that side of the seal 1, which when it is applied, is intended to face the edge of the acetabulum socket, the seal 1 has an impression 4, which largely has the shape of a circle with the opening 2a as its centre. It should be noted that the diameter d of the tubular extension lb is smaller than the diameter D of the impression 4, for reasons that will be set out below.
  • the acetabular ligament is located in connection with the acetabular notch.
  • a screen-like element 5 immediately inside the impression 4, as is shown in figure lb.
  • Figure 2 shows how the seal 1 is applied when an acetabulum 7, the socket-shaped base 6 of which is formed from cancellous bone, is to be filled with bone cement 8.
  • the impression 4 of the seal 1 bears tightly against the opening edge 5 a of the acetabulum socket, see figure 3, which is achieved due to the fact that the seal 1 is bent by the contact pressure force, indicated by arrows F in figure 2, as a result of the diameter d of the protuberance lb being smaller than the diameter D of the impression 4.
  • the bent shape of the seal is indicated by the dashed line 9 in figure 2.
  • the screen-like element 5 covers the acetabular ligament 10, see also figure 3, but sealing is only achieved when the element, under the ef- feet of the pressure of the bone cement, is pressed so that it bears against the latter.
  • the nozzle 3a is introduced through the duct 2 past the flange la, which is thereby pressed outwards, so that it forms a seal, having a function similar to a non-return valve, around the nozzle 3a.
  • the tubular extension lb functions as a stop, so that the tip of the nozzle 3a projects just far enough out of the seal 1 and at the same time serves as support, in order that the seal 1 can be securely pressed with the requisite affixing force F into tight sealing contact against the edge of the socket-shaped opening in the acetabulum 7.

Abstract

The invention relates to an arrangement in a disk-shaped seal (1) designed, when fixing a hip joint prosthesis by means of bone cement from a bone cement injection syringe (3), to pressurise the cement before the prosthesis is applied in the cement. The seal (1) has a through-duct (2) for the nozzle (3a) of the bone cement injection syringe (3) on the one hand, and on the other an element (1b) designed to define a predetermined position for the tip of the nozzle (3b) in relation to the surface of the seal (1) facing that of the acetabulum socket. By means of the said element it is at the same time possible, with the injection syringe (3), to press the seal (1) into sealing contact with the edge of the acetabulum socket. The said surface of the seal (1) has an impression (4), which runs circularly around the opening (2a). Inside the impression (4) there is a screening element (5), designed when the seal (1) is applied against the edge of the acetabulum socket, to bear against the acetabular ligament.

Description

Arrangement in a seal used for fixing a hip joint prosthesis
The present invention relates to an arrangement according to the pre-characterising part of claim 1.
In fixing an acetabulum prosthesis with bone cement it is in everyone's interest that the prosthesis should have a durable and secure fixing. It is known from experience that a prerequisite for this is that the bone cement be pressed into good contact with and preferably made to penetrate into the cancellous bone, so that mixing of blood in the bone cement is avoided.
The object of the present invention is to produce an improved fixing of an acetabulum prosthesis. According to the invention this achieved by an arrangement which has the features specified in the characterising part of claim 1.
Further advantages ensue from the invention in that, for example, with the arrangement according to the invention it is known when the quantity of bone cement necessary for fixing of the prosthesis has been dispensed from the mixture injection syringe, that is to say the risk of excess quantities of bone cement leaking out from the operation area is entirely precluded or at least reliably prevented. By preventing the admixture of blood into the bone cement the durability of the prosthesis is significantly improved through improved fixation to the bone tissue.
Further features and advantages of the invention will be apparent from the subordinate claims and from the following description of one embodiment of the invention, referring to the drawing attached. In this drawing figure la, as an example, shows a diagrammatic section through an arrangement according to the invention and figure lb shows a perspective view of the arrangement. Figure 2 shows a diagram of the arrangement according to the invention in situ during dispensing of the bone cement. In the drawing 1 generally denotes a cushion-like seal made from an elastic, compressible, rubbery material. The seal 1, which is substantially circular, has a thickness of approximately 10 mm and overall dimensions such that it properly covers the edge of the acetabulum socket, as will be clearly apparent from the following.
The seal 1 has a central through-duct 2, intended for inserting the nozzle 3a of a bone cement injection syringe 3 when the seal 1 is applied. The seal has an annular flange la at the opening 2a of the duct 2, which when the seal 1 is applied is intended to face the acetabulum. On the opposite side of the seal, that is to say the side on which the nozzle 3 a is intended to be inserted into the duct 2, the seal 1 has a tubular part lb, which constitutes an extension of the duct 2.
On that side of the seal 1, which when it is applied, is intended to face the edge of the acetabulum socket, the seal 1 has an impression 4, which largely has the shape of a circle with the opening 2a as its centre. It should be noted that the diameter d of the tubular extension lb is smaller than the diameter D of the impression 4, for reasons that will be set out below.
As is well known the acetabular ligament is located in connection with the acetabular notch. In order to ensure sealing against the acetabular ligament when the seal 1 is applied, there is a screen-like element 5 immediately inside the impression 4, as is shown in figure lb.
Figure 2 shows how the seal 1 is applied when an acetabulum 7, the socket-shaped base 6 of which is formed from cancellous bone, is to be filled with bone cement 8. The impression 4 of the seal 1 bears tightly against the opening edge 5 a of the acetabulum socket, see figure 3, which is achieved due to the fact that the seal 1 is bent by the contact pressure force, indicated by arrows F in figure 2, as a result of the diameter d of the protuberance lb being smaller than the diameter D of the impression 4. The bent shape of the seal is indicated by the dashed line 9 in figure 2. The screen-like element 5 covers the acetabular ligament 10, see also figure 3, but sealing is only achieved when the element, under the ef- feet of the pressure of the bone cement, is pressed so that it bears against the latter. The nozzle 3a is introduced through the duct 2 past the flange la, which is thereby pressed outwards, so that it forms a seal, having a function similar to a non-return valve, around the nozzle 3a. The tubular extension lb functions as a stop, so that the tip of the nozzle 3a projects just far enough out of the seal 1 and at the same time serves as support, in order that the seal 1 can be securely pressed with the requisite affixing force F into tight sealing contact against the edge of the socket-shaped opening in the acetabulum 7.
In pressing the bone cement 8 into the socket-shaped opening, blood is forced out of the cancellous bone of the opening and the bone cement is pressed by the prevailing excess pressure into the cancellous bone in the walls of the socket, which provides an optimal contact surface between the bone cement and the bone material. When the requisite quantity of bone cement has been injected into the space between the seal 1 and the wall of the socket, so that the latter is completely filled and pressurised as described above, the seal 1 is removed and a prosthesis is cemented fast in the conventional way. This cementing is not an object of the present invention and will therefore not be described further.

Claims

Claims
1. Arrangement in a substantially circular, disk-shaped seal (1) designed, when fixing a hip joint prosthesis by means of bone cement from a bone cement injection syringe (3), to pressurise the cement before the prosthesis is applied in the cement, characterised in that the seal (1) has a through-duct (2) for the nozzle (3 a) of the bone cement injection syringe (3) on the one hand, and on the other an element (lb) designed to define a predetermined position for the tip of the nozzle (3b) in relation to the surface of the seal (1) facing that of the acetabulum socket, and at the same time to make it possible, with the injection syringe (3), to press the seal (1) into sealing contact with the edge of the acetabulum socket, in that the said surface of the seal (1) has an impression (4), which runs circularly around the opening (2a) and in that inside the impression (4) there is a screening element (5), designed when the seal (1) is applied against the edge of the acetabulum socket, to bear against the acetabular ligament (10).
2. Arrangement according to claim 1, characterised in that the said element is a tubular protuberance lb, projecting from that side of the seal (1) remote from the said surface, through which protuberance the duct (2) runs and against which the bone cement injection syringe (3) is intended to be pressed.
3. Arrangement according to claim 2, characterised in that the diameter (d) of the tubular protuberance (lb) is smaller than the diameter (D) of the impression (4).
4. Arrangement according to any of the preceding claims, characterised in that the duct (2) through the seal (1) and the protuberance (lb) is inclined in relation to the plane of the seal
(1).
5. Arrangement according to any of the preceding claims, characterised in that in the orifice (2a) of the duct (2) on the said surface there is an annular flange (la), designed to be bent out from the surface by the nozzle (3 a) in order to form a seal having a function similar to a non-return valve.
6. Arrangement according to any of the preceding claims, characterised in that the diameter of the impression is in the range 45 to 60 mm.
AMENDED CLAIMS
[received by the International Bureau on 20 September 2001 (20.09.01); original claims 1-6 replaced by new claims 1-5 (2 pages)]
1. Arrangement in a substantially circular, disk-shaped seal (1) designed, when fixing
a hip joint prosthesis by means of bone cement from a bone cement injection sy¬
ringe (3) to pressurize the cement before the prosthesis is applied in the cement,
which seal (1) has a through-duct (2) for the nozzle (3a) of the bone cement injec¬
tion syringe (3), a screening element (5), designed when the seal (1) is applied
against the acetabulum socket to seal and bear against the acetabular ligament (10)
and a protruding element (lb) projecting from that side of the seal (1) remote from
that facing the acetabulum socket and through which protruding element (lb) the
duct (2) runs, whereby said protruding element (lb) is designed to define a predetermined position for the tip of the nozzle (3b) in relation to the surface of the seal
(1) facing that of the acetabulum socket and against which protruding element (lb)
the bone cement injection syringe (3) is intended to be pressed to press the seal into
sealing contact with the acetabulum socket, characterized in that the said surface of
the seal (1) has an impression (4), which runs circularly around the opening (2a) together with a flange-shaped projection (11) of an elastic, compressible material,
which projection (11) is designed to conform to the shape of the opening edge (5a)
of the acetabulum socket to together with the impression (4) sealingly bear against
the edge (5 a) when the seal (1) is applied against the acetabulum socket.
2. Arrangement according to claim 1, characterized in that the diameter (d) of the pro¬
truding element (lb) is smaller than the diameter (D) of the impression (4).
3. Arrangement according to any of the preceding claims, characterised in that the
duct (2) through the seal (1) and the protruding element (lb) is inclined in relation to the plane of the seal (1).
4. Arrangement according to any of the preceding claims, characterised in that the ori¬
fice (2a) of the duct (2) on the said surface is an annular flange (la), designed to be
bent out from the surface by the nozzle (3 a) in order to form a seal having a func¬
tion similar to a non-return valve.
5. Arrangement according to any of the preceding claims, characterised in that the diameter of the impression is in the range 45 to 60 mm.
PCT/SE2000/001973 2000-10-12 2000-10-12 Arrangement in a seal used for fixing a hip joint prosthesis WO2002030339A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/SE2000/001973 WO2002030339A1 (en) 2000-10-12 2000-10-12 Arrangement in a seal used for fixing a hip joint prosthesis
AU2001215626A AU2001215626A1 (en) 2000-10-12 2000-10-12 Arrangement in a seal used for fixing a hip joint prosthesis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE2000/001973 WO2002030339A1 (en) 2000-10-12 2000-10-12 Arrangement in a seal used for fixing a hip joint prosthesis

Publications (1)

Publication Number Publication Date
WO2002030339A1 true WO2002030339A1 (en) 2002-04-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2000/001973 WO2002030339A1 (en) 2000-10-12 2000-10-12 Arrangement in a seal used for fixing a hip joint prosthesis

Country Status (2)

Country Link
AU (1) AU2001215626A1 (en)
WO (1) WO2002030339A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1900346A1 (en) * 2006-09-18 2008-03-19 Tecres S.P.A. Device for filling bone cavities with fluid cement, acetabular cavities in particular
WO2022117994A1 (en) * 2020-12-03 2022-06-09 University Of Newcastle Upon Tyne Bone cement pressuriser

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2104390A (en) * 1981-08-25 1983-03-09 Univ Exeter Pressurisation of cement in bones
EP0650706A1 (en) * 1993-10-29 1995-05-03 Howmedica International Inc. Method and apparatus for implanting an acetabular cup
US5501687A (en) * 1992-11-20 1996-03-26 Sulzer Medizinaltechnik Ag Body for distributing bone cement for the anchoring of implants
GB2297911A (en) * 1995-02-17 1996-08-21 Johnson & Johnson Medical Ltd Acetabular cement pressuriser

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2104390A (en) * 1981-08-25 1983-03-09 Univ Exeter Pressurisation of cement in bones
US5501687A (en) * 1992-11-20 1996-03-26 Sulzer Medizinaltechnik Ag Body for distributing bone cement for the anchoring of implants
EP0650706A1 (en) * 1993-10-29 1995-05-03 Howmedica International Inc. Method and apparatus for implanting an acetabular cup
GB2297911A (en) * 1995-02-17 1996-08-21 Johnson & Johnson Medical Ltd Acetabular cement pressuriser

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1900346A1 (en) * 2006-09-18 2008-03-19 Tecres S.P.A. Device for filling bone cavities with fluid cement, acetabular cavities in particular
WO2008035160A2 (en) 2006-09-18 2008-03-27 Tecres S.P.A. Device for filling bone cavities with fluid cement, acetabular cavities in particular
WO2008035160A3 (en) * 2006-09-18 2008-07-03 Tecres Spa Device for filling bone cavities with fluid cement, acetabular cavities in particular
JP2010503446A (en) * 2006-09-18 2010-02-04 テクレス・ソシエタ・ペル・アチオニ Device for filling bone cavities, especially acetabular cavities, with fluid cement
WO2022117994A1 (en) * 2020-12-03 2022-06-09 University Of Newcastle Upon Tyne Bone cement pressuriser

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