WO2003022166A1 - Osteosynthesis device for femoral fractures - Google Patents

Osteosynthesis device for femoral fractures Download PDF

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Publication number
WO2003022166A1
WO2003022166A1 PCT/IB2002/003639 IB0203639W WO03022166A1 WO 2003022166 A1 WO2003022166 A1 WO 2003022166A1 IB 0203639 W IB0203639 W IB 0203639W WO 03022166 A1 WO03022166 A1 WO 03022166A1
Authority
WO
WIPO (PCT)
Prior art keywords
sleeves
plate
device according
device
plane
Prior art date
Application number
PCT/IB2002/003639
Other languages
French (fr)
Inventor
Nilli Del Medico
Original Assignee
Vese, Silvana
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 ITTO2001A000854 priority Critical
Priority to ITTO20010854 priority patent/ITTO20010854A1/en
Application filed by Vese, Silvana filed Critical Vese, Silvana
Publication of WO2003022166A1 publication Critical patent/WO2003022166A1/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/74Devices for the head or neck or trochanter of the femur
    • A61B17/742Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck
    • A61B17/746Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck the longitudinal elements coupled to a plate opposite the femoral head

Abstract

An osteosynthesis device (2) for fractures in the femur head is provided with an elongate plate (4) and with a pair of sleeves projecting from the upper end of the plate towards the interior of the femur head, said sleeves being placed horizontally side by side on a plane (X'-Z') perpendicular to a vertical centre plane (X-Y) of the plate (4), so as to allow a very wide bearing surface in the vertical direction and simultaneously allow an excellent resistance to torsion.

Description

OSTEOSYNTHESIS DEVICE FOR FEMORAL FRACTURES

The present invention relates to an osteosynthesis device for fractures in the head of an elongate bone. More particularly, the invention relates to a system with a plate and screws allowing to immobilise one or more fractures in the head of a bone of elongate type, such as a femur.

The plates generally have an elongate shape and are available in different models, depending on the shape and size of the bone they are to be applied to.

A plurality of independent screws, directly screwed into the bone by means of suitable tools, are generally used for fixing a plate to a bone and for immobilising the fracture.

At least a projecting sleeve is generally present in the upper terminal part of the plate. Said sleeve is able to penetrate into the femur head, into which a corresponding compression screw is inserted.

Although the solution of using one single screw is the simplest one, it can cause some inconvenience. In fact, the femur head is subjected to considerable stresses, especially of torsional type, that can open the fracture, thereby jeopardising a perfect setting.

In order to get round this inconvenience, the tendency is to use plates provided with two parallel sleeves, and therefore two screws, like for instance the plate shown in the European patent application EP 0 649 635.

In fact, the document EP 0 649 635 describes a plate for osteosynthesis provided in its upper part with two parallel sleeves, vertically placed side by side, that is longitudinally to the same plate. However, even if this solution allows to avert the torsional movements of the fractured part of the femur, it offers a rather limited bearing surface in the vertical direction. In fact, the femur head must support a large part of the person's weight, and this weight turns out to be a force vertically applied on the sleeves and on the screws.

Therefore it appears clear that the plate shown in the document EP 0 649 635 offers a bearing surface in the vertical direction limited to the width of the sleeve and of the upper screw, the second sleeve and the second screw being hidden underneath.

It is an object of the invention to provide an osteosynthesis device for fractures in a femur head, said device being provided with a pair of sleeves for the insertion of two corresponding screws, offering a very wide bearing surface in the vertical direction and simultaneously assuring an excellent resistance to torsion.

The above and other objects are achieved by means of the device made in accordance with the invention, as claimed in the hereby attached claims.

The device, made in accordance with the invention, provides for the presence of at least two sleeves horizontally placed side by side, each sleeve being suitable to house a corresponding screw.

The above and other objects of the invention will become more readily apparent from the following description of a preferred embodiment, with reference to the accompanying drawings, in which:

- Figure 1 is a perspective view of a first embodiment of an osteosynthesis device made in accordance with the present invention;

- Figure 2 is a perspective view of a second embodiment of an osteosynthesis device made in accordance with the present invention;

- Figure 3 is a side perspective view of a third embodiment of an osteosynthesis device made in accordance with the present invention; and - Figure 4 is a frontal view of the osteosynthesis device of

Figure 3.

Referring to Figure 1, an osteosynthesis device 2 for immobilising a fracture in a femur head comprises a plate 4 provided with a plurality of holes 10 for the fixing, by means of suitable screws, to the elongate part of a femur. Said device further comprises a pair of sleeves 6,8 arranged in correspondence with the upper end of the plate 4 and projecting towards the interior of the femur head for the insertion, through two holes 16, 18, of a pair of screws 12, 14.

The two sleeves 6,8 penetrate into the bone over all their length, while the plate 4 rests on the external surface of the bone.

The two sleeves 6,8 are horizontally placed side by side and lie on a plane X'-Z' substantially perpendicular to a vertical centre plane X-Y of the plate 4. Thanks to this particular configuration, the sleeves 6, 8 and the corresponding screws 12, 14 offer a very wide bearing surface in the vertical direction.

The size of the sleeves 6, 8, in particular their length and diameter, can be varied for manufacturing different models of osteosynthesis devices or for adapting said sleeves to different types of compression screws.

In fact, in the device 2 of Figure 1 where the two compression screws 12, 14 are shown in a schematic way, it is possible to use different types of screws, in so far as the used sleeves allow. A second embodiment of an osteosynthesis device 20 made according to the present invention is shown in Figure 2.

The device 20 of Figure 2 is provided with an elongate plate 24, provided with holes 30 for the fixing to the bone by means of suitable screws, said plate having a shape and characteristics similar to the plate 4 of the 2 previously described.

The device 20 differentiates from the device 2 because the two sleeves 26, 28, arranged at the upper end of the plate 24 in correspondence with two holes 36, 38 and projecting towards the interior of the bone, present between them a diverging angle α. This configuration of the sleeves allows to improve the grip of the screws into the bone and, in any case, offers a very wide bearing surface in the vertical direction.

Likewise the sleeves 6, 8 of the device previously described with reference to the Figure 1, the two sleeves 26, 28 lie on a plane substantially perpendicular to a vertical centre plane of the plate 24.

The angle α may vary between zero and a few degrees, according to the type of bone and to the length of the screws 32, 34 used.

A second embodiment of the osteosynthesis device 40 manufactured according to the present invention is shown in the Figures 3 and 4.

The device of Figure 3, shown in a side view when applied to a fractured femur 62, is provided with an elongate plate 44, provided with holes 62 for the fixing to the bone by means of suitable screws 64, said plate having a shape and characteristics similar to the plate of the device 2 previously described with reference to Figure 1. Said device is further provided with three sleeves 42, 46, 48 projecting from the upper end of the plate towards the interior of the bone.

The device 40 differentiates from the device 2 described with reference to the Figure 1 because it is provided with a third sleeve 42, arranged in a central position above the sleeves 46 and 48.

The two lower sleeves 46 and 48 are parallel between them, but they could also diverge, and lie on a plane substantially perpendicular to a vertical centre plane of the plate 44, likewise the sleeves 6, 8 of the device previously described with reference to the

Figure 1. Instead, the third sleeve 42 lies on a plane parallel to the plane on which the lower sleeves 46 and 48 lie and is parallel to said sleeves.

The Figure 4 shows the device 40 of Figure 3 in a frontal view without the screws for the fixing to the bone.

The sleeves shown in the Figures from 1 to 4 are manufactured in a unique body with the plate, for instance in stainless steel or in another biocompatible material. As an alternative, the plate and the sleeves could be manufactured as separate pieces that can be joined for instance by screwing the sleeves in threaded holes obtained in the plate. The latter solution would have the advantage of allowing the combination of different types of sleeves, having different lengths or internal diameters, with different types of plate.

Claims

Patent claims
1. An osteosynthesis device (2; 20; 40) for fractures in the head of an elongate bone (62), of the type comprising:
- a plate (4; 24; 44) having a plurality of holes (10, 16, 18, 30, 36, 38; 62, 52, 56, 58) for fixing said plate to said femur;
- at least two sleeves (6, 8; 26, 28; 46, 48), projecting from said plate in the bone direction and internally hollow, said at least two sleeves being arranged in correspondence with two corresponding holes (16, 18; 36, 38; 56, 58) obtained in said plate and being adapted to receive a compression screw (12, 14;
32, 34; 54) suitable to be screwed into the head of said femur
(62); characterised in that said at least two sleeves (6, 8; 26, 28; 46,
48) are horizontally placed side by side and lie on a plane {X'-Z') substantially perpendicular to a vertical centre plane (X-Y) of said plate (4; 24; 44).
2. Device according to claim 1, wherein said at least two sleeves (6, 8) are parallel between them.
3. Device according to claim 1, wherein said at least two sleeves (26, 28) are divergent between them.
4. Device according to claim 1, further comprising a third sleeve (42) arranged above said at least two sleeves (46, 48) in a central position.
5. Device according to claim 4, wherein said third sleeve (42) is parallel to the plane where said at least two sleeves (46, 48) lie.
6. Device according to claim 5, wherein said third sleeve (42) is parallel to said at least two sleeves (46, 48).
7. Device according to any of the preceding claims, wherein said sleeves are manufactured in a unique body with the plate.
8. Device according to any of the claims from 1 to 6, wherein said sleeves are manufactured as pieces separated from said plate and are screwed into threaded holes obtained in the plate itself.
PCT/IB2002/003639 2001-09-07 2002-09-06 Osteosynthesis device for femoral fractures WO2003022166A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ITTO2001A000854 2001-09-07
ITTO20010854 ITTO20010854A1 (en) 2001-09-07 2001-09-07 Osteosynthesis device for femoral fractures.

Publications (1)

Publication Number Publication Date
WO2003022166A1 true WO2003022166A1 (en) 2003-03-20

Family

ID=11459174

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2002/003639 WO2003022166A1 (en) 2001-09-07 2002-09-06 Osteosynthesis device for femoral fractures

Country Status (2)

Country Link
IT (1) ITTO20010854A1 (en)
WO (1) WO2003022166A1 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1610699A2 (en) * 2003-03-25 2006-01-04 Marc Waisman Hybrid interlocking proximal femoral fracture fixation
US7229445B2 (en) 2004-06-21 2007-06-12 Synthes (Usa) Bone plate with bladed portion
US7534244B2 (en) 2003-09-08 2009-05-19 Smith & Nephew, Inc. Orthopaedic plate and screw assembly
US7780667B2 (en) 2003-09-08 2010-08-24 Smith & Nephew, Inc. Orthopaedic plate and screw assembly
ITTO20090188A1 (en) * 2009-03-12 2010-09-13 Intrauma S R L Osteosynthesis device for femoral fractures.
WO2010103494A2 (en) * 2009-03-12 2010-09-16 Intrauma S.R.L. Osteosynthesis plate for femur fractures
US7799030B2 (en) 2003-09-08 2010-09-21 Smith & Nephew, Inc. Orthopaedic plate and screw assembly
US7951176B2 (en) 2003-05-30 2011-05-31 Synthes Usa, Llc Bone plate
US8834469B2 (en) 2009-06-30 2014-09-16 Smith & Nephew, Inc. Orthopaedic implant and fastener assembly
US8939978B2 (en) 2007-03-20 2015-01-27 Smith & Nephew, Inc. Orthopaedic plate and screw assembly
US10335211B2 (en) 2004-01-26 2019-07-02 DePuy Synthes Products, Inc. Highly-versatile variable-angle bone plate system
US10342586B2 (en) 2003-08-26 2019-07-09 DePuy Synthes Products, Inc. Bone plate

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2081293A (en) * 1935-11-05 1937-05-25 Charles D Davis Fracture pin
FR1093696A (en) * 1952-12-04 1955-05-09 Device for joining fractured bone in the vicinity of a joint
FR2289154A1 (en) * 1974-10-31 1976-05-28 Tornier Rene Femur neck osteosynthesis prosthesis - has diaphysal splint with three pins fitting in intra-cervical femur portion
DE8527784U1 (en) * 1985-09-28 1988-08-18 Hasselbach, Christoph Von, Dr.Med., 4300 Essen, De
US5674222A (en) * 1994-06-01 1997-10-07 Synthes (U.S.A.) Forked plate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2081293A (en) * 1935-11-05 1937-05-25 Charles D Davis Fracture pin
FR1093696A (en) * 1952-12-04 1955-05-09 Device for joining fractured bone in the vicinity of a joint
FR2289154A1 (en) * 1974-10-31 1976-05-28 Tornier Rene Femur neck osteosynthesis prosthesis - has diaphysal splint with three pins fitting in intra-cervical femur portion
DE8527784U1 (en) * 1985-09-28 1988-08-18 Hasselbach, Christoph Von, Dr.Med., 4300 Essen, De
US5674222A (en) * 1994-06-01 1997-10-07 Synthes (U.S.A.) Forked plate

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1610699A2 (en) * 2003-03-25 2006-01-04 Marc Waisman Hybrid interlocking proximal femoral fracture fixation
EP1610699A4 (en) * 2003-03-25 2010-07-07 Marc Waisman Hybrid interlocking proximal femoral fracture fixation
US10231768B2 (en) 2003-05-30 2019-03-19 DePuy Synthes Products, Inc. Methods for implanting bone plates
US9931148B2 (en) 2003-05-30 2018-04-03 DePuy Synthes Products, Inc. Bone plate
US9308034B2 (en) 2003-05-30 2016-04-12 DePuy Synthes Products, Inc. Bone plate
US7951176B2 (en) 2003-05-30 2011-05-31 Synthes Usa, Llc Bone plate
US10342586B2 (en) 2003-08-26 2019-07-09 DePuy Synthes Products, Inc. Bone plate
US7799030B2 (en) 2003-09-08 2010-09-21 Smith & Nephew, Inc. Orthopaedic plate and screw assembly
US7780667B2 (en) 2003-09-08 2010-08-24 Smith & Nephew, Inc. Orthopaedic plate and screw assembly
US7534244B2 (en) 2003-09-08 2009-05-19 Smith & Nephew, Inc. Orthopaedic plate and screw assembly
US7931652B2 (en) 2003-09-08 2011-04-26 Smith & Nephew, Inc. Orthopaedic plate and screw assembly
US7883509B2 (en) 2003-09-08 2011-02-08 Smith & Nephew, Inc. Orthopaedic implant and screw assembly
US10335211B2 (en) 2004-01-26 2019-07-02 DePuy Synthes Products, Inc. Highly-versatile variable-angle bone plate system
US7229445B2 (en) 2004-06-21 2007-06-12 Synthes (Usa) Bone plate with bladed portion
US8939978B2 (en) 2007-03-20 2015-01-27 Smith & Nephew, Inc. Orthopaedic plate and screw assembly
WO2010103494A3 (en) * 2009-03-12 2010-12-29 Intrauma S.R.L. Osteosynthesis plate for femur fractures
WO2010103494A2 (en) * 2009-03-12 2010-09-16 Intrauma S.R.L. Osteosynthesis plate for femur fractures
ITTO20090188A1 (en) * 2009-03-12 2010-09-13 Intrauma S R L Osteosynthesis device for femoral fractures.
US8834469B2 (en) 2009-06-30 2014-09-16 Smith & Nephew, Inc. Orthopaedic implant and fastener assembly

Also Published As

Publication number Publication date
ITTO20010854D0 (en) 2001-09-07
ITTO20010854A1 (en) 2003-03-07

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