CA2531541A1 - Surgical nail - Google Patents

Surgical nail Download PDF

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Publication number
CA2531541A1
CA2531541A1 CA002531541A CA2531541A CA2531541A1 CA 2531541 A1 CA2531541 A1 CA 2531541A1 CA 002531541 A CA002531541 A CA 002531541A CA 2531541 A CA2531541 A CA 2531541A CA 2531541 A1 CA2531541 A1 CA 2531541A1
Authority
CA
Canada
Prior art keywords
pin
insert
borehole
transverse
sectional profile
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
CA002531541A
Other languages
French (fr)
Other versions
CA2531541C (en
Inventor
Andre Schlienger
Markus Buettler
Peter Senn
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.)
Synthes USA LLC
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2531541A1 publication Critical patent/CA2531541A1/en
Application granted granted Critical
Publication of CA2531541C publication Critical patent/CA2531541C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72—Intramedullary pins, nails or other devices
    • 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
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72—Intramedullary pins, nails or other devices
    • A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
    • A61B17/7241—Intramedullary pins, nails or other devices with special means of locking the nail to the bone the nail having separate elements through which screws pass
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00004—(bio)absorbable, (bio)resorbable, resorptive

Abstract

The invention relates to a surgical nail (1), in the form of an intramedulla ry nail with a central axis (2), consisting of a material M with a tensile strength Fz, compressive strength Fd, density .rho.2 and an elasticity modul us E. Said nail comprises at least one transversal bore (3), which runs transversally to the central axis (2) and has a cross-sectional profile F an d a transversal axis (4), the cross-sectional profile F having a maximum lengt h a that runs in the direction of the central axis and a maximum width b that runs perpendicular to the length. An insert (10) with a longitudinal axis (1 3) can be introduced into the transversal bore (3). Said insert consists of a material m, which has a lower elasticity modulus e < E than the material M. The insert also has a length L that runs in the direction of its longitudina l axis and conforms to the premise L > 0.2 D.

Claims (16)

1. Surgical pin (1), especially an intramedullary pin, with a central axis (2), which consists of a material M with the tensile strength F z, the compression strength F d, the density .rho.2 and the modulus of elasticity E and at least one transverse borehole (3), extending transversely to the central axis (2), with the cross-sectional profile F and a transverse axis (4), the cross-sectional profile F having a maximum length "a" in the direction of the central axis and, perpendicularly thereto, a maximum width "b", the pin having a diameter D in the region of the transverse borehole (3) and the pin including an insert (10), which can be introduced into the transverse borehole (3), has a longitudinal axis (13) and consists of a material m, which has a lower modulus of elasticity e < E than does the material M, the insert (10) having a length L, which is measured in the direction of its longitudinal axis (13) and fulfills the condition L > 0.2 D, characterized in that the insert (10) comprises a centrally drilled stud (19) with several peripherally disposed, conical expansions (20), which can engage corresponding cavities (21) or the longitudinal borehole (23) in the region of the transverse borehole (3) in the form of a click lock.
2. The pin (1) of claim 1, characterized in that L > 0.5 D and preferably L = D.
3. The pin (1) of claims 1 or 2, characterized in that the insert (10) is essentially congruent with the transverse borehole (3).
4. The pin (1) of claim 1, characterized in that the insert (10) has a borehole (14), which is coaxial with its longitudinal axis (13).
5. The pin (1) of one of the claims 1 to 3, characterized in that the modulus of elasticity e < 0.8 E and preferably e < 0.7 E.
6. The pin (1) of one of the claims 1 to 5, characterized in that the material m has a tensile strength f z < F z.
7. The pin (1) of one of the claims 1 to 6, characterized in that the material m has a compression strength f d < F d.
8. The pin (1) of one of the claims 1 to 7, characterized in that the material m is a biocompatible plastic, preferably a polyethylene or a high molecular weight polyethylene (HMWPE).
9. The pin (1) of one of the claims 1 to 8, characterized in that the plastic is a bio-absorbable polymer or copolymer, preferably a polylactide.
10. The pin of one the claims 1 to 9, characterized in that the transverse borehole (3) is a circular borehole, the cross-sectional profile F
having a maximum length a = b).
11. The pin (1) of one who claims 1 to 10, characterized and that the transverse borehole (3) is constructed as an elongated hole, the cross-sectional profile F having a maximum length a > b.
12. The pin of one of the claims 1 to 11, characterized in that the material m also has a lower density .rho.1 than does the material M of density .rho.2, preferably .quadrature.1 < 0.8 .rho.2.
13. The pin (1) of one of the claims 1 to 12, characterized in that it includes a locking screw or a locking bolt, which can be passed into the transverse borehole (3) through the insert (10) and the shaft of which has a diameter d, which satisfies the condition that a > d < b.
14. The pin (1) of one of the claims 1 to 13, characterized in that the transverse borehole (3) expands in the direction of the surface of the pin (1).
15. The pin (1) of one of the claims 1 to 14, characterized in that it includes a locking screw (20) with a screw shaft (21) and an external thread (22), the diameter d of the screw thread (22) fulfilling the condition that a > d < b and d preferably being at least 5% smaller than the smaller of the two dimensions a, b.
16. The pin (1) of one of the claims 1 to 15, characterized in that the insert (10) consists of a stud (17) with a conically expanded head (18).
CA2531541A 2003-06-12 2003-06-12 Surgical nail Expired - Fee Related CA2531541C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2003/000376 WO2004110291A1 (en) 2003-06-12 2003-06-12 Surgical nail

Publications (2)

Publication Number Publication Date
CA2531541A1 true CA2531541A1 (en) 2004-12-23
CA2531541C CA2531541C (en) 2011-05-10

Family

ID=33546137

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2531541A Expired - Fee Related CA2531541C (en) 2003-06-12 2003-06-12 Surgical nail

Country Status (15)

Country Link
US (1) US9737347B2 (en)
EP (1) EP1631206B1 (en)
JP (1) JP4357478B2 (en)
CN (1) CN100457058C (en)
AR (1) AR044330A1 (en)
AT (1) ATE375125T1 (en)
AU (1) AU2003232567B2 (en)
BR (1) BR0318327B1 (en)
CA (1) CA2531541C (en)
CL (1) CL2004000867A1 (en)
DE (1) DE50308380D1 (en)
ES (1) ES2294372T3 (en)
NZ (1) NZ544074A (en)
TW (1) TWI323169B (en)
WO (1) WO2004110291A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007112589A1 (en) * 2006-04-06 2007-10-11 Halifax Biomedical Inc. Intramedullary rod with vent

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US10080596B2 (en) 2013-12-09 2018-09-25 Acumed Llc Hip fixation with load-controlled dynamization
US9433451B2 (en) 2013-12-09 2016-09-06 Acumed Llc Hip fixation system with a compliant fixation element
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007112589A1 (en) * 2006-04-06 2007-10-11 Halifax Biomedical Inc. Intramedullary rod with vent
US9005201B2 (en) 2006-04-06 2015-04-14 Halifax Biomedical Inc. Intramedullary rod with vent

Also Published As

Publication number Publication date
AU2003232567B2 (en) 2007-12-20
AR044330A1 (en) 2005-09-07
CN100457058C (en) 2009-02-04
JP4357478B2 (en) 2009-11-04
BR0318327A (en) 2006-07-11
US9737347B2 (en) 2017-08-22
DE50308380D1 (en) 2007-11-22
EP1631206A1 (en) 2006-03-08
EP1631206B1 (en) 2007-10-10
AU2003232567A1 (en) 2005-01-04
ATE375125T1 (en) 2007-10-15
NZ544074A (en) 2007-10-26
JP2006527004A (en) 2006-11-30
CL2004000867A1 (en) 2005-01-14
CA2531541C (en) 2011-05-10
BR0318327B1 (en) 2013-06-18
TW200505386A (en) 2005-02-16
CN1787787A (en) 2006-06-14
ES2294372T3 (en) 2008-04-01
WO2004110291A1 (en) 2004-12-23
US20060149248A1 (en) 2006-07-06
TWI323169B (en) 2010-04-11

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EEER Examination request
MKLA Lapsed

Effective date: 20160613

MKLA Lapsed

Effective date: 20160613