CA2478079A1 - Intramedullary trial fixation device - Google Patents

Intramedullary trial fixation device Download PDF

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Publication number
CA2478079A1
CA2478079A1 CA002478079A CA2478079A CA2478079A1 CA 2478079 A1 CA2478079 A1 CA 2478079A1 CA 002478079 A CA002478079 A CA 002478079A CA 2478079 A CA2478079 A CA 2478079A CA 2478079 A1 CA2478079 A1 CA 2478079A1
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CA
Canada
Prior art keywords
trial
stem
trial stem
capture
bone
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.)
Granted
Application number
CA002478079A
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French (fr)
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CA2478079C (en
Inventor
Christopher Scifert
Dean Hughes
Scott Elliott
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Smith and Nephew Inc
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Individual
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Publication of CA2478079C publication Critical patent/CA2478079C/en
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    • 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
    • A61F2250/006—Additional features; Implant or prostheses properties not otherwise provided for modular
    • A61F2250/0064—Sets comprising a plurality of prosthetic parts of different sizes
    • 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
    • A61F2250/0097—Visible markings, e.g. indicia

Landscapes

  • Health & Medical Sciences (AREA)
  • Transplantation (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Prostheses (AREA)

Abstract

An intramedullary fixation device (10) for use in securing a trial (52) in the medullary canal of a bone to determine the offset and orientation of a prosthetic implant for replacement of a joint articulating surface of the bone is disclosed. The fixation device comprises a body (14) for receiving a trial and a fixation portion (12) for engaging the trial. A system for use in surgical repair of a joint comprising a selection of prosthetic implants of various sizes, a selection of trials of various sizes corresponding to the sizes of the implants, a selection of fixation devices of various sizes corresponding to the sizes of the trials, a trial fixation device driver for inserting the fixation device and attached trial into the canal of a bone, and a trial device extractor for removing the fixation device from the resected bone is disclosed. Methods of using the fixation device and system of the invention are disclosed.

Claims (20)

1. An apparatus for securing a trial stem in the medullary canal of a bone, comprising:
a) a body having a proximal end and a distal end, the body adapted to be received in the bone and adapted to receive the trial stem;
b) a fixation portion attached to the body for engaging the trial stem;
and c) a trial stem.
2. The apparatus of claim 1, wherein the fixation portion uses a clamping mechanism to engage the trial stem.
3. The apparatus of claim 1, wherein the fixation portion comprises:
a first capture member attached to the body;
a second capture member; and a first fastener, wherein the first fastener is adapted to engage the second capture member and move the second capture member towards the first capture member to engage the trial stem.
4. The apparatus according to claim 3, further comprising a first bias interposed between the first and second capture members.
5. The apparatus according to claim 4, wherein the first bias is a first compression spring and is adapted to surround the first fastener.
6. The apparatus of claim 3, wherein the first capture member has a first aperture, the second capture member has a second threaded aperture, and the first fastener is a first tension bolt adapted to extend through the first aperture and thread through the second aperture so that when the first tension bolt is tightened, the second capture member moves toward the first capture member.
7. The apparatus according to claim 6, wherein the first capture member has a third threaded aperture and the second capture member has a fourth aperture, the apparatus further comprising a second tension bolt adapted to extend through the fourth aperture and thread through the third aperture so that when the second tension bolt is tightened the second capture member moves toward the first capture member to engage the trial stem.
8. The apparatus of any of claims 3 to 7, wherein the first capture member comprises a first finger and the second capture member comprises a second finger and the trial stem is engaged between the first finger and the second forger.
9. The apparatus according to claim 8, wherein the trial stem has a first lateral fin and a second lateral fin and the first finger engages the first lateral fin and the second forger engages the second lateral fin.
10. The apparatus of claim 8, wherein the trial stem has a medial fin and the first finger and the second finger engage the medial fin.
11. The apparatus according to claim 7, further comprising a second compression spring interposed between the first and second capture members and surrounding the second tension bolt.
12. The apparatus according to claim 3, wherein the fixation portion further comprises a capture member connector connected to the first capture member, wherein the second capture member has a connector aperture adapted to slidably receive the capture member connector.
13. The apparatus according to claim 3, wherein the body comprises:
a collar at the proximal end;
a medial fin slot extending from the proximal end down the body;
a lateral fin slot extending from the proximal end down the body;
two rotation prevention fins extending from the collar down the body; and a trial stem sleeve at the distal end having an interior surface.
14. The apparatus according to claim 13, further comprising a friction liner adapted to be affixed to the interior surface of the trial stem sleeve.
15. The apparatus of claim 1, wherein the body has a collar at the proximal end and the fixation portion is a radially compressing semi-circular clamp adapted to fit within the collar and engage the trial stem.
16. The apparatus of claim 1, wherein the fixation portion is a compressible liner adapted to fit in the distal end of the body and engage the trial stem.
17. A system for surgical replacement of a joint articulating portion of a bone utilizing the apparatus of any of claims 1 to 16, comprising:
a) a selection of prosthetic implants each having a stem member and a head member, the stem members being of various lengths and diameters, each stem member having a first end adapted to be received within the medullary canal of a resected bone and a second end connected to the head member, the head members being of various heights and diameters adapted to approximate the size and shape of the joint articulating surface requiring replacement;
b) a selection of trials each having a trial stem member and a trial head member, the trial stem members being of various lengths and diameters corresponding to the lengths and diameters of the prosthetic implant stem members, the trial stem members each having a first end adapted to be received within the medullary canal of a resected bone and a second end connected to the trial head member, the trial head members being of various heights and diameters corresponding to the heights and diameters of the prosthetic implant head members;
c) a selection of the apparatuses of various sizes corresponding to the lengths and diameters of the trial stem for securing the trial stem in the medullary canal;

d) a trial fixation device driver for inserting the apparatus and attached trial stem in the medullary canal; and e) a trial fixation device extractor for removing the apparatus from the medullary canal.
18. The system according to claim 17, wherein the prosthetic implant is modular and the stem member and the head member are separate and adapted to be coupled together.
19. The system according to claim 17, wherein the trial is modular and the trial stem member and the trial head member are separate and adapted to be coupled together.
20. A method for replacing a joint articulating portion of a bone in a patient utilizing the system of any of the claims 17 to 19 to comprising:
(a) resecting a proximal end of the patient's humerus;
(b) selecting the trial having a trial stem member having a length and diameter that corresponds to the length of the resected bone and the diameter of the medullary canal of the resected bone;
(c) selecting the trial head member having a height and diameter that corresponds to the height and diameter of the joint articulating surface of the bone being replaced;
(d) selecting an apparatus that corresponds to the trial stem member;
(e) engaging the apparatus on the trial stem member;
(f) implanting the assembled trial and fixation device into the patient's bone and testing various orientations of the trial head member and trial stem member;
(g) repeating steps (c) through (f) as necessary to select a desired head size and a desired orientation;
(h) extracting the trial and apparatus from the patient;
(i) selecting a prosthesis implant head and stem that correspond to the size and shape of the trial head member and trial stem member;

(j) implanting the prosthesis implant into the patient's resected bone.
CA2478079A 2002-03-06 2003-03-04 Intramedullary trial fixation device Expired - Fee Related CA2478079C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/091,817 2002-03-06
US10/091,817 US6746487B2 (en) 2002-03-06 2002-03-06 Intramedullary trial fixation device
PCT/US2003/006739 WO2003075806A1 (en) 2002-03-06 2003-03-04 Intramedullary trial fixation device

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CA2478079A1 true CA2478079A1 (en) 2003-09-18
CA2478079C CA2478079C (en) 2011-06-14

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EP (1) EP1482878B1 (en)
JP (1) JP4416515B2 (en)
AT (1) ATE512645T1 (en)
AU (1) AU2003225676B2 (en)
CA (1) CA2478079C (en)
ES (1) ES2367984T3 (en)
WO (1) WO2003075806A1 (en)

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AU2003225676B2 (en) 2009-01-08
EP1482878B1 (en) 2011-06-15
US6746487B2 (en) 2004-06-08
US20030171816A1 (en) 2003-09-11
JP2005518900A (en) 2005-06-30
AU2003225676A1 (en) 2003-09-22
ES2367984T3 (en) 2011-11-11
EP1482878A1 (en) 2004-12-08
JP4416515B2 (en) 2010-02-17
CA2478079C (en) 2011-06-14
ATE512645T1 (en) 2011-07-15
WO2003075806A1 (en) 2003-09-18

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