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WO1998030164B1 - Helical osteosynthetic implant - Google Patents

Helical osteosynthetic implant

Info

Publication number
WO1998030164B1
WO1998030164B1 PCT/EP1997/006863 EP9706863W WO9830164B1 WO 1998030164 B1 WO1998030164 B1 WO 1998030164B1 EP 9706863 W EP9706863 W EP 9706863W WO 9830164 B1 WO9830164 B1 WO 9830164B1
Authority
WO
WIPO (PCT)
Prior art keywords
blades
implant according
nail
bone
helical
Prior art date
Application number
PCT/EP1997/006863
Other languages
French (fr)
Other versions
WO1998030164A1 (en
Filing date
Publication date
Priority claimed from US08/782,231 external-priority patent/US5741256A/en
Application filed filed Critical
Priority to AT97953762T priority Critical patent/ATE250892T1/en
Priority to EP97953762A priority patent/EP0961587B1/en
Priority to DE69725342T priority patent/DE69725342T2/en
Priority to AU57551/98A priority patent/AU712089B2/en
Priority to CA002276290A priority patent/CA2276290C/en
Priority to JP53049498A priority patent/JP4131989B2/en
Publication of WO1998030164A1 publication Critical patent/WO1998030164A1/en
Publication of WO1998030164B1 publication Critical patent/WO1998030164B1/en
Priority to HK00100804A priority patent/HK1021930A1/en

Links

Abstract

An osteosynthetic implant for setting a broken bone (29). The implant comprises a nail (8) having a plurality of helically twisted blades (10, 12) that share a common helical axis. At least two of the blades (10, 12) define an angle (17) of less than 180° in a plane perpendicular to the helical axis. In a preferred embodiment, one pair of the blades (12) of the nail (8) is tapered towards its proximal portion and another pair of the blades (10) has a uniform thickness. The blades are twisted by at least about 30°. A cannulation (24) runs through the center of the nail (8) to receive a guide wire. The nail (8) is slidably engageable to a securing member (26, 40) that is securable to an elongated portion (28) of the bone (29), such as a side plate (26) or an intramedullary nail (40). In a preferred implantation orientation, the proximate portion of the tapered blades (12) is parallel to the elongated portion (28) of the bone (29), and a proximate portion of the uniform blades (10) is perpendicular thereto.

Claims

AMENDED CLAIMS[received by the International Bureau on 21 July 1998 (21.07.98); original claims 1, 6, 9, 12 and 16-18 amended; remaining claims unchanged (5 pages)]
1. Implant for setting a broken bone (29) comprising a nail (8) having a plurality of helically twisted blades (10,12) for implantation in a bone fragment, said blades (10,12) being fixed to one another and aligned along a common helical axis, at least two of said blades defining an angle of less than 180┬░ in a plane disposed perpendicularly to said helical axis, characterized in that said helical blades (10,12) comprise at least one tapered blade (12) tapering towards its proximal end to be inserted into the bone, said tapered blade having proximal and distal widths being measured relative to said helical axis, said distal width being greater than said proximal width.
2. Implant according to claim 1 further comprising a securing member (26,40) being securable to an elongate portion (28) of the bone (29), said blades (10,12) being engageable to said securing member (26,40) .
3. Implant according to claim 1 or 2, characterized in that said blades (10,12) are substantially flat and said at least two blades (10,12) define an angle (17) of between 30┬░ and 18
4. Implant according to one of the claims 1 to 3 , characterized in that said helical blades (10,12) have a rate of helical twist such that they can be driven into a bone (29) , and said at least two blades (10,12) define an angle (17) of between 60┬░ and 120┬░.
5. Implant according to one of the claims 1 to 4, characterized in that said helical blades (10,12) are twisted by at least about 30┬░ along said helical axis.
6. Implant according to one of the claims 2 to 5, characterized in that said distal width being disposed toward said securing member (26,40) .
7. Implant according to one of the claims 1 to 6 , characterized in that said at least one tapered blade (12) is twisted by about 45┬░ to 120┬░ along said helical axis.
8. Implant according to one of the claims 1 to 7 , characterized in that said tapered blade (12) is twisted by about 90┬░ and said nail (8) may be implanted such that the distal width of said tapered blade (12) is parallel to the elongate portion (28) of the bone (29) .
9. Implant according to one of the claims 2 to 8 , characterized in that the blades (10,12) are movably engaged to the securing member (26,40) . 19
10. Implant according to one of the claims 1 to 9, characterized in that the blades (10,12) are slidably engaged to the securing member (26,40) in a direction parallel to said helical axis permitting compression of bone fragments.
11. Implant according to one of the claims 1 to 10, characterized in that it further comprises a telescoping portion (22) of the nail (8) which is telescopically engageable to the securing member (26) .
12. Implant according to one of the claims 2 to 11, characterized in that said securing member (26,40) comprises a sleeve (32) for receiving said nail (8) preferably a telescoping portion (22) of said nail (8) .
13. Implant according to claim 12, characterized in that said sleeve (32) comprises an outer sleeve diameter; and said helical blades (10,12) define a helical diameter which is at most about as large as said outer sleeve diameter.
14. Implant according to claim 12 or 13, characterized in that said securing member (26,40) defines helical grooves (46) extending from an inside portion of the sleeve (32) and being aligned therewith, said helical blades (10,12) being slideable within said grooves (32) . 20
15. Implant according to one of the claims 1 to 14, characterized in that nail (8) further comprises a hollow shaft (16) for receiving a guide wire, said hollow shaft (16) extending coaxially with said helical axis.
16. Implant according to one of the claims 2 to 15, characterized in that said securing member (26) is securable to an outside portion (28) of the elongate portion of the bone
(29) .
17. Implant according to one of the claims 2 to 16, characterized in that said securing member (40) comprises an intramedullary nail for insertion within the elongate portion (28) of the bone (29) , in a direction substantially parallel thereto .
18. Implant according to one of the claims 2 to 17, characterized in that said securing member (26,40) and said helical axis define an angle of between about 90┬░ and 150┬░.
19. A nail (8) for setting a broken bone (29), the nail comprising:
A) a shaft (16) defining a helical axis;
B) a uniform pair of blades (10) disposed on the shaft (16) ;
C) a tapered pair of blades (12) disposed on the shaft (16) in a manner such that each tapered blade (12) is positioned between the uniform pair of blades (10) , said tapered blades
(12) having a greatest width at a distal portion and a smallest 21
width at a proximal portion, said uniform and tapered blades (10,12) having a total helical twist of at least about 30┬░ around the helical axis; and
D) wherein said nail (8) is drivable into the bone (29) and a distal portion of the nail (16) is slidably engageable to a securing member (26.40), said securing member (26,40) being securable to an elongate portion (28) of the bone (29) .
PCT/EP1997/006863 1997-01-13 1997-12-09 Helical osteosynthetic implant WO1998030164A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AT97953762T ATE250892T1 (en) 1997-01-13 1997-12-09 SCREW-SHAPED IMPLANT FOR OSTEOSYNTHESIS
EP97953762A EP0961587B1 (en) 1997-01-13 1997-12-09 Helical osteosynthetic implant
DE69725342T DE69725342T2 (en) 1997-01-13 1997-12-09 SCREW-SHAPED IMPLANT FOR OSTEOSYNTHESIS
AU57551/98A AU712089B2 (en) 1997-01-13 1997-12-09 Helical osteosynthetic implant
CA002276290A CA2276290C (en) 1997-01-13 1997-12-09 Helical osteosynthetic implant
JP53049498A JP4131989B2 (en) 1997-01-13 1997-12-09 Helical osteosynthesis graft
HK00100804A HK1021930A1 (en) 1997-01-13 2000-02-11 Helical osteosynthetic implant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/782,231 1997-01-13
US08/782,231 US5741256A (en) 1997-01-13 1997-01-13 Helical osteosynthetic implant

Publications (2)

Publication Number Publication Date
WO1998030164A1 WO1998030164A1 (en) 1998-07-16
WO1998030164B1 true WO1998030164B1 (en) 1998-09-03

Family

ID=25125427

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/006863 WO1998030164A1 (en) 1997-01-13 1997-12-09 Helical osteosynthetic implant

Country Status (12)

Country Link
US (2) US5741256A (en)
EP (1) EP0961587B1 (en)
JP (1) JP4131989B2 (en)
CN (1) CN1158974C (en)
AT (1) ATE250892T1 (en)
AU (1) AU712089B2 (en)
CA (1) CA2276290C (en)
DE (1) DE69725342T2 (en)
ES (1) ES2207761T3 (en)
HK (1) HK1021930A1 (en)
TW (1) TW391874B (en)
WO (1) WO1998030164A1 (en)

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US2834342A (en) * 1956-08-29 1958-05-13 Clyde E Yost Surgical device for the fixation of fractured bones
US3002514A (en) * 1958-01-24 1961-10-03 Deyerle William Minor Hip setting pin
US3025853A (en) * 1958-07-07 1962-03-20 Christopher A Mason Fixation device for fractured femur
US3029811A (en) * 1960-04-25 1962-04-17 Ken Standard Corp Surgical hip nail
US3561437A (en) * 1967-11-08 1971-02-09 Jose Luis Orlich Apparatus for fixing fractures of the femur
US4103683A (en) * 1977-06-03 1978-08-01 Neufeld John A Sub-trochanteric nail
SU1071298A1 (en) * 1982-09-17 1984-02-07 Koptyukh Vladimir V Apparatus for osteosynthesis
US4628923A (en) * 1983-11-28 1986-12-16 Medoff Robert J Axial compression device
SU1337074A1 (en) * 1985-06-21 1987-09-15 В.В.Коптюх Arrangement for osteosynthesis
US4776330A (en) * 1986-06-23 1988-10-11 Pfizer Hospital Products Group, Inc. Modular femoral fixation system
DE8703491U1 (en) * 1987-03-09 1987-04-23 Waldemar Link Gmbh & Co, 2000 Hamburg Hip prosthesis
CH673762A5 (en) * 1987-12-02 1990-04-12 Synthes Ag
CH683963A5 (en) * 1988-06-10 1994-06-30 Synthes Ag Internal fixation.
US4978349A (en) * 1989-08-03 1990-12-18 Synthes (U.S.A.) Fixation plate
US5032125A (en) * 1990-02-06 1991-07-16 Smith & Nephew Richards Inc. Intramedullary hip screw
CH681595A5 (en) * 1990-03-19 1993-04-30 Synthes Ag
CH682300A5 (en) * 1990-12-17 1993-08-31 Synthes Ag
CH683024A5 (en) * 1991-04-16 1993-12-31 Synthes Ag Connecting means for connecting a first adjustable with a second construction element, in particular of tubes or rods of a fixation device.
CH685851A5 (en) * 1991-05-24 1995-10-31 Synthes Ag A surgical instrument for positioning osteosynthetic fasteners
CH686222A5 (en) * 1991-05-30 1996-02-15 Synthes Ag The trochanter stabilization.
DE59208301D1 (en) * 1992-06-25 1997-05-07 Synthes Ag OSTEOSYNTHETIC FIXATION DEVICE
US5498264A (en) * 1992-07-21 1996-03-12 Synthes (U.S.A.) Clamp connection for connecting two construction components for a setting device, particularly an osteosynthetic setting device
EP0610219B1 (en) * 1992-08-24 1996-09-25 Synthes AG, Chur External fixation device for osteosynthesis
US5534001A (en) * 1993-05-11 1996-07-09 Synthes (U.S.A.) Osteosynthetic fixation element and manipulation device
FR2711505B1 (en) * 1993-10-25 1995-12-29 Tornier Sa Device for synthesizing fractures of the upper end of the femur.
DE59610122D1 (en) * 1996-07-31 2003-03-13 Synthes Ag DEVICE FOR FIXING BROKEN HIP HEADS

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