WO2017019327A1 - Tool and method for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis - Google Patents

Tool and method for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis Download PDF

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Publication number
WO2017019327A1
WO2017019327A1 PCT/US2016/042430 US2016042430W WO2017019327A1 WO 2017019327 A1 WO2017019327 A1 WO 2017019327A1 US 2016042430 W US2016042430 W US 2016042430W WO 2017019327 A1 WO2017019327 A1 WO 2017019327A1
Authority
WO
WIPO (PCT)
Prior art keywords
jaw
acetabular
tool
shaft
nut
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.)
Ceased
Application number
PCT/US2016/042430
Other languages
French (fr)
Inventor
Zafer Termanini
Brian Vanhiel
Linda BRADDON
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.)
Hip Innovation Technology LLC
Original Assignee
Hip Innovation Technology LLC
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
Priority to JP2018504946A priority Critical patent/JP6765684B2/en
Priority to EP16831034.0A priority patent/EP3328290B1/en
Priority to BR112018001597-0A priority patent/BR112018001597B1/en
Priority to KR1020187003550A priority patent/KR102376082B1/en
Priority to AU2016298565A priority patent/AU2016298565B2/en
Priority to NZ739113A priority patent/NZ739113A/en
Priority to ES16831034T priority patent/ES2797749T3/en
Priority to CN201680044145.9A priority patent/CN108135587B/en
Application filed by Hip Innovation Technology LLC filed Critical Hip Innovation Technology LLC
Priority to CA2992583A priority patent/CA2992583C/en
Priority to US15/742,208 priority patent/US10751198B2/en
Publication of WO2017019327A1 publication Critical patent/WO2017019327A1/en
Priority to ZA2018/00294A priority patent/ZA201800294B/en
Anticipated expiration legal-status Critical
Priority to US16/925,795 priority patent/US11020243B2/en
Ceased legal-status Critical Current

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
    • A61F2/46—Special tools for implanting artificial joints
    • A61F2/4637—Special tools for implanting artificial joints for connecting or disconnecting two parts of a prosthesis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • 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 or setting implements
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
    • 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
    • A61F2/4603—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4609—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof of acetabular cups
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B2017/564—Methods for bone or joint treatment
    • 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
    • A61F2/4603—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof
    • 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
    • A61F2002/30621—Features concerning the anatomical functioning or articulation of the prosthetic joint
    • A61F2002/30649—Ball-and-socket joints
    • 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
    • A61F2002/348—Additional features
    • A61F2002/3483—Additional features having a convex shape, e.g. hemispherical heads
    • 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
    • A61F2/4603—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2002/4619—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof for extraction
    • 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
    • A61F2/4603—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2002/4625—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use
    • A61F2002/4627—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
    • 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
    • A61F2/4637—Special tools for implanting artificial joints for connecting or disconnecting two parts of a prosthesis
    • A61F2002/4641—Special tools for implanting artificial joints for connecting or disconnecting two parts of a prosthesis for disconnecting

Definitions

  • the present invention relates to surgical tools used in connection with a reverse hip prosthesis. More particularly, the invention has to do with a surgical tool for extracting an acetabular ball from an acetabular cup.
  • a reverse hip prosthesis is described in U.S. Patents Nos. 8,313,531 B2 and 8,540,779 B2.
  • the prosthesis and a revision surgery method also are described in U.S. Patent No. 8,992,627 B2.
  • the disclosures of these three patents are incorporated herein in their entireties by reference.
  • the acetabular ball is affixed by means of a Morse taper to an acetabular cup stem.
  • the stem extends from the bottom of a concave surface of the acetabular cup.
  • the surgical tool of the invention enables a surgeon to remove the acetabular ball from an implanted prosthesis without pulling on the acetabular cup and without disrupting any bone ingrowth.
  • acetabular ball extractor from time to time to describe the tool of the invention and the term “tool” or “instrument” is sometimes used to refer to either or both of the first and second embodiments of the invention.
  • FIG. 1 is a perspective view of a first embodiment of the surgical tool of the invention.
  • FIG. 2 is an elevation view of a second embodiment of the tool.
  • FIG. 3 is a section view of the tool in a first step illustrating the jaws positioned over an acetabular ball which has been affixed in an acetabular cup.
  • FIG. 4 is an elevation view of the tool in a second step fully engaged with the acetabular ball and cup.
  • Fig. 5 is a section view of Fig. 4 taken along section line A-A.
  • Fig. 6 is a section view of the tool in a third step illustrating an acetabular ball separated from the stem of the acetabular cup.
  • Fig. 7 is an elevation view of a handle or outer shaft for the acetabular ball extractor.
  • Fig. 8 is an elevation view of a jaw assembly of the acetabular ball extractor.
  • Fig. 9 is an elevation view of a block bar of the acetabular ball extractor.
  • Fig. 10 is an elevation view of the handle bell of the acetabular ball extractor.
  • Fig. 11 is an elevation view of a shaft nut of the second embodiment of the acetabular ball extractor.
  • Fig. 12 is a partially exploded view of the second embodiment of the tool of the invention.
  • Fig. 12A is a magnified view of the proximal end of Fig. 12.
  • the tool 1 is the first embodiment of the tool of the invention and is illustrated in perspective in Fig. 1.
  • the tool 1a is the second embodiment of the tool of the invention and is illustrated in a partially exploded view in Fig. 12 and in elevation in Fig. 2.
  • the tool 1 comprises a jaw shaft 10 having two or more than two jaws 2 disposed at the distal end thereof. Each jaw 2 is pivotable about a pin 2 having an axis perpendicular to a central axis of jaw shaft 10. And jaw shaft 10 has a threaded proximal end 11. (See Figs. 8, 12 and 2A.)
  • the jaw shaft 10 is disposed concentrically in outer shaft 4.
  • a bell shaped element, referred to herein as handle bell 3 is affixed to the distal end of outer shaft 4.
  • the handle bell 3 is internally sized to cause jaws 2 to close as the jaws
  • Outer shaft 4 has an optional knurled portion 5.
  • a jaw shaft nut 9 or 9a is threaded onto the proximal end of jaw shaft 0 and an outer shaft nut 6 or 6a is affixed to the proximal end of outer shaft 4.
  • an outer shaft nut 6 or 6a is affixed to the proximal end of outer shaft 4.
  • the nuts are disposed adjacent to one another with the jaw shaft nut 9 or 9a being disposed proximally to the outer shaft nut 6 or 6a.
  • Jaw shaft 10 is illustrated in section in Figs. 3, 5 and 6, and in elevation in Fig.8.
  • Figs. 12 and 12A illustrate the threaded proximal end 1 of jaw shaft 10;
  • Fig. 12A being a magnified view of the proximal end A of the tool illustrated in Fig. 12.
  • Fig. 7 is an elevation view of outer shaft 4 with an outer shaft nut 6a thereon.
  • the jaw shaft 10 is illustrated in elevation in Fig. 8 with jaws 2 thereon and a block bar 8 is illustrated in elevation in Fig. 9.
  • Figs. 10 and 11 are elevations of handle bell 3 and jaw shaft nut 9a, respectively.
  • Figs. 3-6 The operation of the tool is illustrated in Figs. 3-6.
  • the jaws 2 are allowed to open when jaw shaft 10 is pushed in a distal direction while holding shaft 4 so that the jaws move out of handle bell 3.
  • the jaws 2 are hinged by pins 12.
  • Fig. 3 the jaws 2 are shown in section after they have been pushed out of handle bell 3 and pushed over acetabular ball 20.
  • Acetabular ball 20 is securely affixed by means of a Morse taper on stem 21.
  • Stem 21 is affixed to and extends from the concave surface off acetabular cup 22.
  • Figs. 4 and 5 the circumferential bell edge 33 at the distal end of handle bell 3 has been pushed into engagement with the circumferential cup edge 23 of acetabular cup 22.
  • the next step is to grip shaft 4 while turning jaw shaft nut 9 or 9a causing the jaw shaft to move in a proximal direction so that jaws 2 pull on acetabular ball 20 while handle bell 3 exerts an opposing force on the circumferential cup edge 23 of acetabular cup 22.
  • the opposing force prevents pulling on acetabular cup 22 so that the cup is not pulled out of the acetabulum.
  • a rod or block bar 8 is placed in a hole 7 or 7a of outer shaft nut 6 or 6a and another rod or block bar 8 is placed in a hole 7 or 7a of jaw shaft nut 9 or 9a when additional leverage is needed to exert a pulling force on acetabular ball 20 and an opposing pushing force on acetabular cup 22.
  • the holes 7 and 7a are perpendicular to the central axes of the nuts. If more leverage is needed, the block bars 8 are removed from one or both of shaft nuts 6a or 9a and a wrench is used on either or both shaft nuts by placing the open end of the wrench(es) (not shown) over one or both hex portions 14 or 15. When sufficient force is exerted, the ball separates from stem 21 as illustrated by space 30 in Fig. 6.

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Transplantation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Vascular Medicine (AREA)
  • Cardiology (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Prostheses (AREA)
  • Surgical Instruments (AREA)

Abstract

A surgical tool for extracting an acetabular ball from an acetabular cup in an implanted hip prosthesis wherein the acetabular ball is affixed by means of a Morse taper to a stem extending from bottom of the concave portion of the acetabular cup. The surgical tool enables a surgeon to remove the ball without pulling on the acetabular cup and without disrupting any bone ingrowth because the tool maintains pressure on the cup while exerting an opposing pressure pulling on the ball.

Description

TOOL AND METHOD FOR REMOVING
AN ACETABULAR BALL FROM AN ACETABULAR CUP IN A HIP REPLACEMENT PROSTHESIS
BACKGROUND OF THE INVENTION
Field of the Invention
[0001] The present invention relates to surgical tools used in connection with a reverse hip prosthesis. More particularly, the invention has to do with a surgical tool for extracting an acetabular ball from an acetabular cup.
The Related Art
[0002] A reverse hip prosthesis is described in U.S. Patents Nos. 8,313,531 B2 and 8,540,779 B2. The prosthesis and a revision surgery method also are described in U.S. Patent No. 8,992,627 B2. The disclosures of these three patents are incorporated herein in their entireties by reference.
SUMMARY OF THE INVENTION
[0003] As described in the patents referenced above, the acetabular ball is affixed by means of a Morse taper to an acetabular cup stem. The stem extends from the bottom of a concave surface of the acetabular cup. The surgical tool of the invention enables a surgeon to remove the acetabular ball from an implanted prosthesis without pulling on the acetabular cup and without disrupting any bone ingrowth. In the present disclosure, we use the term "acetabular ball extractor" from time to time to describe the tool of the invention and the term "tool" or "instrument" is sometimes used to refer to either or both of the first and second embodiments of the invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0004] Fig. 1 is a perspective view of a first embodiment of the surgical tool of the invention.
[0005] Fig. 2 is an elevation view of a second embodiment of the tool.
[0006] Fig. 3 is a section view of the tool in a first step illustrating the jaws positioned over an acetabular ball which has been affixed in an acetabular cup.
[0007] Fig. 4 is an elevation view of the tool in a second step fully engaged with the acetabular ball and cup.
[0008] Fig. 5 is a section view of Fig. 4 taken along section line A-A.
[0009] Fig. 6 is a section view of the tool in a third step illustrating an acetabular ball separated from the stem of the acetabular cup.
[0010] Fig. 7 is an elevation view of a handle or outer shaft for the acetabular ball extractor.
[0011] Fig. 8 is an elevation view of a jaw assembly of the acetabular ball extractor.
[0012] Fig. 9 is an elevation view of a block bar of the acetabular ball extractor.
[0013] Fig. 10 is an elevation view of the handle bell of the acetabular ball extractor.
[0014] Fig. 11 is an elevation view of a shaft nut of the second embodiment of the acetabular ball extractor. [0015] Fig. 12 is a partially exploded view of the second embodiment of the tool of the invention.
[0016] Fig. 12A is a magnified view of the proximal end of Fig. 12.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0017] The tool 1 is the first embodiment of the tool of the invention and is illustrated in perspective in Fig. 1. The tool 1a is the second embodiment of the tool of the invention and is illustrated in a partially exploded view in Fig. 12 and in elevation in Fig. 2.
[0018] Referring to Figs. 1-6, the tool 1 comprises a jaw shaft 10 having two or more than two jaws 2 disposed at the distal end thereof. Each jaw 2 is pivotable about a pin 2 having an axis perpendicular to a central axis of jaw shaft 10. And jaw shaft 10 has a threaded proximal end 11. (See Figs. 8, 12 and 2A.) The jaw shaft 10 is disposed concentrically in outer shaft 4. A bell shaped element, referred to herein as handle bell 3, is affixed to the distal end of outer shaft 4. The handle bell 3 is internally sized to cause jaws 2 to close as the jaws
2 are drawn into the handle bell 3 by proximal movement of jaw shaft 10 toward the proximal end of the tool 1 as explained in more detail below. The handle bell
3 has a circumferential bell edge 33 at its distal end sized to engage a
circumferential cup edge 23 of an acetabular cup. Outer shaft 4 has an optional knurled portion 5.
[0019] A jaw shaft nut 9 or 9a is threaded onto the proximal end of jaw shaft 0 and an outer shaft nut 6 or 6a is affixed to the proximal end of outer shaft 4. When the jaw shaft nut abuts the outer shaft nut and the threads at the proximal end of shaft 4 are right handed, tightening jaw shaft nut 9 or 9a by turning it in a clockwise (or right-handed) direction will exert a distal force on nut 6 or 6a causing the jaw shaft 10 to move in a proximal direction relative to the outer shaft 4. By way of further explanation, the nuts are disposed adjacent to one another with the jaw shaft nut 9 or 9a being disposed proximally to the outer shaft nut 6 or 6a. Jaw shaft 10 is illustrated in section in Figs. 3, 5 and 6, and in elevation in Fig.8. Figs. 12 and 12A illustrate the threaded proximal end 1 of jaw shaft 10; Fig. 12A being a magnified view of the proximal end A of the tool illustrated in Fig. 12. Fig. 7 is an elevation view of outer shaft 4 with an outer shaft nut 6a thereon. The jaw shaft 10 is illustrated in elevation in Fig. 8 with jaws 2 thereon and a block bar 8 is illustrated in elevation in Fig. 9. Figs. 10 and 11 are elevations of handle bell 3 and jaw shaft nut 9a, respectively.
[0020] The difference between tools 1 and 1a has to do with differences in outer shaft nuts 6 and 6a and jaw shaft nuts 9 and 9a. Nuts 6 and 9 are knurled and holes 7 are provided in the knurled portions to receive block bars 8 which are used to provide leverage in the operation of the tool. Nuts 6a and 9a are also knurled but they are additionally provided with hex portions 14 and 15, respectively. Holes 7a are provided for block bars 8 in hex portions 14 and 15. The hex portions allow the surgeon to use a wrench or wrenches (not shown) instead of some or all of the block bars in order to obtain increased leverage during operation of the tool. Of course, flattened portions on the outer surface of the nuts having shapes other than a hex can be used to permit use of a wrench or other tool in order to obtain increased leverage as will be apparent to those having ordinary skill in the art.
[0021] The operation of the tool is illustrated in Figs. 3-6. The jaws 2 are allowed to open when jaw shaft 10 is pushed in a distal direction while holding shaft 4 so that the jaws move out of handle bell 3. The jaws 2 are hinged by pins 12. In Fig. 3 the jaws 2 are shown in section after they have been pushed out of handle bell 3 and pushed over acetabular ball 20. Two or more than two jaws may be used as will be apparent to those having skill in the art. Acetabular ball 20 is securely affixed by means of a Morse taper on stem 21. Stem 21 is affixed to and extends from the concave surface off acetabular cup 22.
[0022] In Figs. 4 and 5 the circumferential bell edge 33 at the distal end of handle bell 3 has been pushed into engagement with the circumferential cup edge 23 of acetabular cup 22. When the tool has been engaged with the ball and cup in this manner, the next step is to grip shaft 4 while turning jaw shaft nut 9 or 9a causing the jaw shaft to move in a proximal direction so that jaws 2 pull on acetabular ball 20 while handle bell 3 exerts an opposing force on the circumferential cup edge 23 of acetabular cup 22. The opposing force prevents pulling on acetabular cup 22 so that the cup is not pulled out of the acetabulum. A rod or block bar 8 is placed in a hole 7 or 7a of outer shaft nut 6 or 6a and another rod or block bar 8 is placed in a hole 7 or 7a of jaw shaft nut 9 or 9a when additional leverage is needed to exert a pulling force on acetabular ball 20 and an opposing pushing force on acetabular cup 22. The holes 7 and 7a are perpendicular to the central axes of the nuts. If more leverage is needed, the block bars 8 are removed from one or both of shaft nuts 6a or 9a and a wrench is used on either or both shaft nuts by placing the open end of the wrench(es) (not shown) over one or both hex portions 14 or 15. When sufficient force is exerted, the ball separates from stem 21 as illustrated by space 30 in Fig. 6.

Claims

1. A surgical tool for removing an acetabular ball from an acetabular cup wherein the acetabular ball is affixed by means of a Morse taper to a stem extending from a concave surface of the acetabular cup comprising:
a jaw shaft having two or more than two jaws disposed at a distal end thereof, each jaw being pivotable about an axis perpendicular to a central axis of the jaw shaft and the jaw shaft having a threaded proximal end;
an outer shaft into which the jaw shaft is concentrically disposed, the outer shaft having a bell shaped element affixed to a distal end thereof, the bell shaped element being open at its distal end and being internally sized to cause the jaws to close when the jaws are drawn into the bell shaped element by proximal movement of the jaw shaft toward a proximal end of the tool and the bell shaped element having a circumferential bell edge at its distal end sized to engage a circumferential cup edge of the acetabular cup; and
a jaw shaft nut threaded onto the proximal end of the jaw shaft wherein tightening of the nut exerts pressure in a distal direction on the proximal end of the outer shaft causing the jaw shaft to move proximally relative to the outer shaft and thereby causing the jaws to exert a pulling force on the
acetabular ball while causing the circumferential bell edge of the bell shaped element to exert an opposing force on the circumferential cup edge of the acetabular cup until sufficient tightening of the jaw shaft nut causes the
acetabular ball to be released from the stem.
2. The tool of claim 1 further comprising an outer shaft nut affixed to the proximal end of the outer shaft, the jaw shaft nut and the outer shaft nut being disposed adjacent to one another and the jaw shaft nut being disposed proximally to the outer shaft nut.
3. The tool of claim 2 wherein the jaw shaft nut and the outer shaft nut each further comprise a hole perpendicular to the central axis thereof, each hole being sized to receive a rod wherein the rod provides leverage for turning the jaw shaft nut relative to the outer shaft nut.
4. The tool of claim 3 wherein one or both of the jaw shaft nut and the outer shaft nut further comprise flattened portions on the outer surface thereof to facilitate engagement of a wrench or other tool to provide increased leverage.
5. A kit containing the surgical tool of claim 1.
6. A method of using the surgical tool of claim 1 comprising disposing the jaws over an acetabular ball which affixed by means of a Morse taper to a stem extending from a concave surface of the acetabular cup and contacting the circumferential bell edge of the bell shaped element with the circumferential cup edge of the acetabular cup and then pulling the jaw stem in the proximal direction while pushing on the acetabular cup in a distal direction until the acetabular ball is released from the stem.
7. The method of claim 6 wherein the jaw stem is pulled in the proximal direction while pushing on the acetabular cup in a distal direction by tightening of the jaw shaft nut.
PCT/US2016/042430 2015-07-27 2016-07-15 Tool and method for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis Ceased WO2017019327A1 (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
ES16831034T ES2797749T3 (en) 2015-07-27 2016-07-15 Tool to remove an acetabular ball from an acetabular cup in a hip replacement prosthesis
BR112018001597-0A BR112018001597B1 (en) 2015-07-27 2016-07-15 SURGICAL TOOL AND KIT
KR1020187003550A KR102376082B1 (en) 2015-07-27 2016-07-15 Tools and methods for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis
AU2016298565A AU2016298565B2 (en) 2015-07-27 2016-07-15 Tool and method for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis
NZ739113A NZ739113A (en) 2015-07-27 2016-07-15 Tool and method for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis
CN201680044145.9A CN108135587B (en) 2015-07-27 2016-07-15 Tool and method for removing acetabular ball from the acetabular cup in a hip replacement prosthesis
CA2992583A CA2992583C (en) 2015-07-27 2016-07-15 Tool and method for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis
JP2018504946A JP6765684B2 (en) 2015-07-27 2016-07-15 Tools and methods for removing the acetabular ball from the acetabular cup of the hip replacement prosthesis
EP16831034.0A EP3328290B1 (en) 2015-07-27 2016-07-15 Tool for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis
US15/742,208 US10751198B2 (en) 2015-07-27 2016-07-15 Tool and method for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis
ZA2018/00294A ZA201800294B (en) 2015-07-27 2018-01-16 Tool and method for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis
US16/925,795 US11020243B2 (en) 2015-07-27 2020-07-10 Tool and method for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201562197200P 2015-07-27 2015-07-27
US62/197,200 2015-07-27

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US15/742,208 A-371-Of-International US10751198B2 (en) 2015-07-27 2016-07-15 Tool and method for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis
US16/925,795 Continuation US11020243B2 (en) 2015-07-27 2020-07-10 Tool and method for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis

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WO2017019327A1 true WO2017019327A1 (en) 2017-02-02

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US (2) US10751198B2 (en)
EP (1) EP3328290B1 (en)
JP (1) JP6765684B2 (en)
KR (1) KR102376082B1 (en)
CN (1) CN108135587B (en)
AU (1) AU2016298565B2 (en)
BR (1) BR112018001597B1 (en)
CA (1) CA2992583C (en)
ES (1) ES2797749T3 (en)
NZ (1) NZ739113A (en)
WO (1) WO2017019327A1 (en)
ZA (1) ZA201800294B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019039786A1 (en) * 2017-08-23 2019-02-28 아이메디컴(주) Acetabular cup removing apparatus for artificial hip joint
JP2020528786A (en) * 2017-08-23 2020-10-01 アイメディコム Usu cup removal device for artificial hip joint

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108135587B (en) 2015-07-27 2021-05-25 黑普创新技术有限责任公司 Tool and method for removing acetabular ball from the acetabular cup in a hip replacement prosthesis
CN111494066A (en) * 2020-06-09 2020-08-07 经纬医疗器材制造（深圳）有限公司 A total acetabular prosthesis external cup implantation device with retaining ring
KR102475909B1 (en) 2020-10-20 2022-12-07 아주대학교산학협력단 Driver for removal of acetabular screw of acetabular cup in total hip arthroplasty prosthesis
US11090163B1 (en) * 2021-01-09 2021-08-17 Zafer Termanini Interlocking reverse hip prosthesis with removable tapered central post
JP1804272S (en) * 2024-05-30 2025-07-23 Acetabular cup removal device for artificial hip joints

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222382A (en) * 1979-01-26 1980-09-16 Massachusetts Institute Of Technology Femoral component hip joint prosthesis extractor
US4642121A (en) * 1984-09-14 1987-02-10 Waldemar Link Gmbh & Co Joint endoprosthesis and instrument for knocking it in or out
US20070010825A1 (en) * 2005-06-30 2007-01-11 Leisinger Steven R Acetabular liner extraction device, kit and associated method
US8992627B2 (en) * 2010-03-08 2015-03-31 Hip Innovation Technology Llc Interlocking reverese hip and revision prosthesis and method
US9248021B1 (en) * 2015-06-07 2016-02-02 Zafer Termanini Morse taper protective sleeve

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5583153A (en) * 1978-12-19 1980-06-23 Emu Jii Kogyo Kk Apparatus for seizing base of bulb
JPS5918353U (en) * 1982-07-28 1984-02-03 積水ハウス株式会社 light bulb replacement tool
US4686971A (en) * 1984-11-19 1987-08-18 Harris William H Method and apparatus for extraction of prostheses
US4877020A (en) * 1984-11-30 1989-10-31 Vich Jose M O Apparatus for bone graft
GB9623942D0 (en) * 1996-11-15 1997-01-08 Johnson & Johnson Professional Extraction device
US6132469A (en) * 1997-11-07 2000-10-17 Biomet, Inc. Acetabular liner extractor
US5992627A (en) 1998-10-27 1999-11-30 Lai; Chong Yung Packing device for the receiving of the Christmas lamp string
US7481410B2 (en) * 2002-06-24 2009-01-27 Business Machines Security, Inc. Equipment security apparatus
CA2504030A1 (en) 2005-04-13 2006-10-13 Canimex Inc. Special quiet anchor for spring fitting in counterbalancing door, and door assembly including the same
FR2926212B1 (en) * 2008-01-16 2010-03-05 Evolutis PROTHETIC IMPLANT FOR JOINT BETWEEN TWO BONES COMPRISING A FIXING BASE RECEIVING A HEMISPHERIC HEAD
CN202313816U (en) 2011-11-16 2012-07-11 天津正天医疗器械有限公司 Dismantling device for acetabulum nylon inner lining
CN108135587B (en) 2015-07-27 2021-05-25 黑普创新技术有限责任公司 Tool and method for removing acetabular ball from the acetabular cup in a hip replacement prosthesis

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222382A (en) * 1979-01-26 1980-09-16 Massachusetts Institute Of Technology Femoral component hip joint prosthesis extractor
US4642121A (en) * 1984-09-14 1987-02-10 Waldemar Link Gmbh & Co Joint endoprosthesis and instrument for knocking it in or out
US20070010825A1 (en) * 2005-06-30 2007-01-11 Leisinger Steven R Acetabular liner extraction device, kit and associated method
US8992627B2 (en) * 2010-03-08 2015-03-31 Hip Innovation Technology Llc Interlocking reverese hip and revision prosthesis and method
US9248021B1 (en) * 2015-06-07 2016-02-02 Zafer Termanini Morse taper protective sleeve

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3328290A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019039786A1 (en) * 2017-08-23 2019-02-28 아이메디컴(주) Acetabular cup removing apparatus for artificial hip joint
JP2020528786A (en) * 2017-08-23 2020-10-01 アイメディコム Usu cup removal device for artificial hip joint

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US10751198B2 (en) 2020-08-25
KR102376082B1 (en) 2022-03-18
NZ739113A (en) 2022-10-28
JP2018526074A (en) 2018-09-13
JP6765684B2 (en) 2020-10-07
EP3328290B1 (en) 2020-03-11
CA2992583A1 (en) 2017-02-02
HK1251436A1 (en) 2019-02-01
EP3328290A4 (en) 2019-04-03
US20190151117A1 (en) 2019-05-23
US11020243B2 (en) 2021-06-01
EP3328290A1 (en) 2018-06-06
CA2992583C (en) 2023-07-18
CN108135587A (en) 2018-06-08
US20200337864A1 (en) 2020-10-29
AU2016298565B2 (en) 2020-11-12
BR112018001597B1 (en) 2022-12-06
AU2016298565A1 (en) 2018-02-08
ZA201800294B (en) 2019-09-25
KR20180061142A (en) 2018-06-07
CN108135587B (en) 2021-05-25
ES2797749T3 (en) 2020-12-03
BR112018001597A2 (en) 2018-09-18

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