WO2008114112A1 - Removable femoral neck with stem for hip prostheses - Google Patents

Removable femoral neck with stem for hip prostheses Download PDF

Info

Publication number
WO2008114112A1
WO2008114112A1 PCT/IB2008/000607 IB2008000607W WO2008114112A1 WO 2008114112 A1 WO2008114112 A1 WO 2008114112A1 IB 2008000607 W IB2008000607 W IB 2008000607W WO 2008114112 A1 WO2008114112 A1 WO 2008114112A1
Authority
WO
WIPO (PCT)
Prior art keywords
stem
neck
removable
lugs
cavity
Prior art date
Application number
PCT/IB2008/000607
Other languages
French (fr)
Inventor
Sheila Ragbir
Original Assignee
Mariasal Investment N.V.
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 Mariasal Investment N.V. filed Critical Mariasal Investment N.V.
Publication of WO2008114112A1 publication Critical patent/WO2008114112A1/en

Links

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
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • 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
    • A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
    • A61F2002/30339—Double cones, i.e. connecting element having two conical connections, one at each of its opposite ends
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • 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
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3625—Necks
    • 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
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3625—Necks
    • A61F2002/3631—Necks with an integral complete or partial peripheral collar or bearing shoulder at its base
    • 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
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/365—Connections of heads to necks
    • 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
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3652—Connections of necks to shafts
    • 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
    • A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
    • A61F2002/4641—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis for disconnecting
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit

Definitions

  • the present invention relates to the technological sector of hip prostheses and concerns in particular a removable femoral neck with stem for prostheses as described in the preamble of Claim 1.
  • the removable neck allows a prosthesis implant to be adapted to the different anatomical characteristics of the patient, offering moreover the major advantage of being able to replace the neck both during the first surgical operation and on subsequent occasions without having to remove the stem from its seat.
  • the object of the invention is therefore to provide a solution to the abovementioned problem in the form of a removable femoral neck with a stem having technical characteristics such as to facilitate separation of the neck from the stem.
  • the subject of the invention therefore makes use of the known "inclined-plane" physical principle, in order to develop the forces necessary for separation of the stem, ensuring at the same time - something which is very important to avoid jamming - also the directionality of said forces which are thus aligned with respect to the cavity of the stem formed in its top end.
  • the invention envisages that the neck is provided with two lugs which are oriented and directed so as to allow an extractor means, such as, for example, a two-prong fork, to perform easy separation of the neck from the stem.
  • an extractor means such as, for example, a two-prong fork
  • Figure 1 shows the removable neck 1 inserted in the cavity 4 of the stem 2 positioned inside the femur in a front view which also shows the two lugs 5, 5a with which the neck 2 is provided.
  • Figure 2 shows a side view of the removable neck 1 with insertion of an extractor able to disengage said neck 1 from the stem 2 owing to the inclined-plane effect, this effect also commonly being referred to as "wedge effect”.
  • the body of the removable neck 2, along the non-tapered part 3, is provided with two lugs 5 and 5a which are oriented substantially in a perpendicular manner with respect to the axis of the cavity inside which the neck is inserted; moreover, said lugs 5 and 5a have a form and position suitable for inserting an extractor means E, in the form of a fork with two prongs which have walls converging towards said lugs 5 and 5a.
  • the lugs are formed longitudinally on the body of said neck 1 and at a distance h from the stem such as to allow entry of the prongs of the extractor E; in a second embodiment said lugs are formed transversely on the body of the removable neck 1.

Abstract

Femoral neck of the removable type 1 with stem 2 for hip prostheses, engaging in a complementary manner with a cavity of the stem 2 and provided with two lugs 5, 5a which are oriented and positioned so that by inserting an extractor with two prongs having walls converging towards said lugs, the said walls bear against the surface of each lug and the upper surface of the stem 2, exerting, as a result of the inclined-plane effect, a thrust F having a direction parallel to the axis of the cavity able to cause disengagement of the removable neck 1 from the stem 2.

Description

Removable femoral neck with stem for hip prostheses.
The present invention relates to the technological sector of hip prostheses and concerns in particular a removable femoral neck with stem for prostheses as described in the preamble of Claim 1.
As is known to experts in the technical sector concerned, removable femoral necks for hip prostheses terminate at the bottom in a tapered part which is inserted with engagement in a complementary cavity formed in the top end of the stem. Said solution has constituted a major development in the sector of orthopaedic surgery, replacing the so-called monobloc system where the neck and stem were formed as one piece.
The removable neck allows a prosthesis implant to be adapted to the different anatomical characteristics of the patient, offering moreover the major advantage of being able to replace the neck both during the first surgical operation and on subsequent occasions without having to remove the stem from its seat.
Orthopaedic surgeons have established, however, that on some occasions, when operating on a prosthesis which has been used for a certain period of time, the removable neck remains stuck inside the cavity of the stem owing to a greater cohesion which occurs during the course of its use. This makes the operation of extracting the neck from the stem extremely difficult and it is not always possible to solve the problem using extractors of the conventional type which employ an operating principle which is similar to that of an ordinary corkscrew.
The object of the invention is therefore to provide a solution to the abovementioned problem in the form of a removable femoral neck with a stem having technical characteristics such as to facilitate separation of the neck from the stem.
The subject of the invention therefore makes use of the known "inclined-plane" physical principle, in order to develop the forces necessary for separation of the stem, ensuring at the same time - something which is very important to avoid jamming - also the directionality of said forces which are thus aligned with respect to the cavity of the stem formed in its top end.
The invention envisages that the neck is provided with two lugs which are oriented and directed so as to allow an extractor means, such as, for example, a two-prong fork, to perform easy separation of the neck from the stem.
The invention will now be clarified more fully with reference to the accompanying drawings which show schematically a preferred practical embodiment provided solely by way of a non-limiting example in that technical or constructional variations may be made without departing from the scope of the present invention.
In said drawings:
Figure 1 shows the removable neck 1 inserted in the cavity 4 of the stem 2 positioned inside the femur in a front view which also shows the two lugs 5, 5a with which the neck 2 is provided.
Figure 2 shows a side view of the removable neck 1 with insertion of an extractor able to disengage said neck 1 from the stem 2 owing to the inclined-plane effect, this effect also commonly being referred to as "wedge effect".
If one considers the abovementioned Figure 1, it is possible to see a removable neck 1 which has a tapered bottom part 3, inserted inside a stem 2 force-fitted inside a cavity 4 which substantially complements the tapered part 3 of said neck 1 formed in the stem 2.
The body of the removable neck 2, along the non-tapered part 3, is provided with two lugs 5 and 5a which are oriented substantially in a perpendicular manner with respect to the axis of the cavity inside which the neck is inserted; moreover, said lugs 5 and 5a have a form and position suitable for inserting an extractor means E, in the form of a fork with two prongs which have walls converging towards said lugs 5 and 5a.
Said walls, during extraction of the neck, bear against the surface of the lugs 5 and 5a and the surface forming part of the stem 2, exerting as a result of the inclined-plane physical effect a thrust F in a direction parallel to the axis of the cavity, as shown in Figure 2, able to cause extraction of the removable neck from the stem.
In the preferred embodiment the lugs are formed longitudinally on the body of said neck 1 and at a distance h from the stem such as to allow entry of the prongs of the extractor E; in a second embodiment said lugs are formed transversely on the body of the removable neck 1.
The advantages of the invention compared to the known solutions are as follows: simple extraction of the neck and a smaller force to be applied for extraction of the neck owing to the inclined-surface effect.

Claims

Claims
1. Removable femoral neck (1) with stem (2) for hip prostheses, said neck (1) being provided with a tapered part (3) which engages in a complementary manner with a cavity (4) having an axis v-v, formed in the stem, characterized in that the neck (1) is provided with two lugs (5, 5a) which are oriented and positioned so that, by inserting an extractor means having two prongs with walls converging towards said lugs (5, 5a), said walls bear against a surface of each lug and a surface forming part of the stem (2), exerting as a result of the inclined-surface effect a thrust F in a direction parallel to the axis v-v and able to cause extraction of the neck (1) from the stem (2).
2. Removable neck with stem according to Claim 1 , characterized in that said lugs are formed longitudinally on the body of said neck (1).
3. Removable neck with stem according to Claim 1 , characterized in that said lugs are formed transversely on the body of said neck (1).
PCT/IB2008/000607 2007-03-20 2008-03-17 Removable femoral neck with stem for hip prostheses WO2008114112A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH445/07 2007-03-20
CH00445/07A CH701386B1 (en) 2007-03-20 2007-03-20 Mobile femoral neck stem for hip replacement.

Publications (1)

Publication Number Publication Date
WO2008114112A1 true WO2008114112A1 (en) 2008-09-25

Family

ID=39582248

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/000607 WO2008114112A1 (en) 2007-03-20 2008-03-17 Removable femoral neck with stem for hip prostheses

Country Status (2)

Country Link
CH (1) CH701386B1 (en)
WO (1) WO2008114112A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4676797A (en) * 1983-11-08 1987-06-30 Mecron Medizinische Produkte Gmbh Unit for resection prosthesis
FR2617706A1 (en) * 1987-07-08 1989-01-13 Fechant Louis Hip prosthesis with adjustment strut having a frustoconical part inserted into a complementary cavity of the rod
US4822370A (en) * 1986-01-14 1989-04-18 Orthoplant Endoprothetik Hip joint femoral prosthesis
WO2005060877A1 (en) * 2003-12-12 2005-07-07 Mariasal Investment N.V. Movable neck and stem for hip prosthesis, made in such a way as to facilitate their disengagement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4676797A (en) * 1983-11-08 1987-06-30 Mecron Medizinische Produkte Gmbh Unit for resection prosthesis
US4822370A (en) * 1986-01-14 1989-04-18 Orthoplant Endoprothetik Hip joint femoral prosthesis
FR2617706A1 (en) * 1987-07-08 1989-01-13 Fechant Louis Hip prosthesis with adjustment strut having a frustoconical part inserted into a complementary cavity of the rod
WO2005060877A1 (en) * 2003-12-12 2005-07-07 Mariasal Investment N.V. Movable neck and stem for hip prosthesis, made in such a way as to facilitate their disengagement

Also Published As

Publication number Publication date
CH701386B1 (en) 2011-01-14

Similar Documents

Publication Publication Date Title
US10398569B2 (en) Impactor-extractor
KR20110038630A (en) Minimally invasive surgical tools for hip prosthesis
EP2685938B1 (en) System for bone anchor removal
CA2664100A1 (en) Intervertebral disc implants, tooling and insertion methods therefor
KR102603509B1 (en) Surgical trays, instruments and methods for removing components of a hip replacement prosthesis
US10092420B2 (en) Method of attachment of implantable cup to a cup impactor
JP2000079132A (en) Prosthetic system and stem system
EP3328320B1 (en) Acetabular cup extractor
EP2952159B1 (en) Metacarpal rod anchor for a trapezometacarpal prosthesis
AU2018202696B2 (en) Femoral prosthesis with insertion/extraction feature
US20200337864A1 (en) Tool and method for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis
EP3319558A2 (en) Hollow sleeve augment device and tool
KR102515893B1 (en) Cross Country Interchangeable Plate System
US11344437B2 (en) Trial neck apparatus and method
US20180193169A1 (en) Femoral cup and femoral ball extractor
US11013615B2 (en) Assembly for implanting an acetabular cup in a cotyloid cavity
WO2008114112A1 (en) Removable femoral neck with stem for hip prostheses
WO2009037284A2 (en) Femoral stem of a non-cemented endoprosthesis of the mini-invasive type of a coxofemoral joint with high primary and secondary stability
EP3799842B1 (en) Medical implant extractor
US20070043445A1 (en) Movable neck and stem for hip prosthesis, made in such a way as to facilitate their disengagement
AU2014331234B2 (en) Device for use in orthopaedic surgery
CN115701770A (en) Head puller
JP7390484B2 (en) bone staple extraction system
WO2022254738A1 (en) Ball removal instrument
EP2060237B1 (en) Removable closure unit for axial bone consolidation implants

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08737306

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08737306

Country of ref document: EP

Kind code of ref document: A1