JP4015828B2 - Implant member for femoral osteosynthesis - Google Patents

Implant member for femoral osteosynthesis Download PDF

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Publication number
JP4015828B2
JP4015828B2 JP2001215439A JP2001215439A JP4015828B2 JP 4015828 B2 JP4015828 B2 JP 4015828B2 JP 2001215439 A JP2001215439 A JP 2001215439A JP 2001215439 A JP2001215439 A JP 2001215439A JP 4015828 B2 JP4015828 B2 JP 4015828B2
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Japan
Prior art keywords
member
head
shaft
femoral
plate
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Active
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JP2001215439A
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Japanese (ja)
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JP2003024344A (en
Inventor
威知郎 中山
順二 伊藤
憲司 土居
▲吉▼雄 難波
Original Assignee
威知郎 中山
株式会社神戸製鋼所
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Priority to JP2001215439A priority Critical patent/JP4015828B2/en
Publication of JP2003024344A publication Critical patent/JP2003024344A/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
    • A61B17/748Devices 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 with means for adapting the angle between the longitudinal elements and the shaft axis of the femur
    • 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

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an implant member used for bone fixation treatment in a treatment when a bone near the femoral head is fractured.
[0002]
[Prior art]
Conventionally, many fractures occur near the femoral head where a large load is applied. Therefore, the fractured bone is formed into a desired shape by using an implant member in which the shaft member for the head of the head and the plate are connected in a "<" shape. The treatment to be held is done.
[0003]
FIG. 4 is a cross-sectional view for explaining a state in which an implant member is attached in the vicinity of the fractured femoral head, in which the femoral head 15 and the femoral shaft 16 are fractured at the femoral neck 18. The head member 10 is inserted into the head 15 of the fractured femur, and the plate 11 connected to the head member 10 is fixed along the diaphysis 16 by the screw member 13. The neck 18 is connected and fixed (conventional example 1).
[0004]
In the implant member of the above-described conventional example 1, the angle formed by the shaft member 10 for the head of the head and the plate 11 is fixed, but the angle formed by the bone head of the femur and the diaphysis has individual differences. There was a need to prepare implant members of various angles. Accordingly, various implant members have been proposed in which the angle formed between the bone head shaft member and the plate is variable (for example, JP 7-509621, US Pat. No. 3,554,193, JP 10-52438, etc.).
[0005]
Among them, the implant member which the present inventors have disclosed in JP-A-10-52438, as shown in FIG. 5, and the femur tube 32 and the plate 11 which constitutes a part of the femoral head for shaft member, to each other angle are connected via a connecting shaft 34 so that it can be changed, as shown in FIG. 6 (a) ~ (c) , the second actuated first operating member 35 (the male screw 35b) rotationally operated The member 36 (female screw 36b, convex portion 36a) is moved, and by this movement, the concave portion 36c is moved, and the femoral tube 32 rotates around the connecting shaft 34, so that the angle (the connecting angle) changes. Therefore, it is possible to finely adjust the connection angle during the operation, reduce the burden on the patient such as less bleeding because the portion protruding outside the bone is small, and resist the large load on the bone head after the operation Excellent Inn that can It is a plant member (conventional example 2).
[0006]
However, in recent years, there has been a growing demand for implants that can be adapted to individual differences in the size and shape of the bone head and the diaphysis as well as the angle formed between the bone head and the diaphysis. Even when an implant member is used, it is necessary to prepare a plurality of implant members at the time of surgery.
[0007]
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to provide an implant member that can be applied to a wide variety of patients at a low cost. Specifically, the present invention provides not only an angle between a bone head and a diaphysis but also a bone head and a diaphysis. of, size and shape itself, if the site-degree of fracture varies is the child provide an implant member of best fit size and shape to the individual patient.
[0008]
[Means for Solving the Problems]
The invention of claim 1 comprises a shaft member for the head of the head embedded in the femoral head, and a plate connected to the lower end of the shaft member for the head and fixed along the outer surface of the femoral shaft. In the implant member in which the upper end portion of the plate and the lower end portion of the shaft member for the head are connected via a connecting means so that the angle formed by each other can be changed, and the angle adjusting means is provided in the connecting portion. The angle adjusting means is configured such that a connecting shaft as the connecting means is integrally joined to one of the lower end portion of the bone head shaft member and the upper end portion of the plate, and the connecting shaft is connected to the other member. A bearing portion having an openable portion that can be taken in and out is formed, the connecting shaft is rotatably supported by the bearing portion, and a bolt hole having a female screw penetrating the inner surface of the bearing portion is formed. Combine Fixing bolt having a screw is provided, when the fixing bolt is tightened, characterized in that it is configured with the connecting shaft to secure against the said bearing portion with its tip end protrudes into the open side It is an implant member for femoral osteosynthesis.
[0009]
According to the present invention , since the plate and the shaft member for the head of bone are detachably configured with a simple structure, even if there are individual differences in the size and shape of the bone head and the bone shaft itself, Even if the degree is different in each case, the plate or head shaft member can be replaced as appropriate to obtain a combination that best suits the individual patient. In addition, when the plate and the shaft member for the head of the bone are connected, the plate and the shaft member for the head of the head are formed during the operation according to the angle formed by the bone head and the diaphysis of the individual, as in the case of the implant member of Conventional Example 2. The angle can be adjusted freely and can be fixed at any angle .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of an implant member for femoral osteosynthesis according to the present invention will be described in detail with reference to the drawings. 1 and 2 are views for explaining an implant member according to an embodiment of the invention of claim 1 in which the head member and the plate are detachable and the angle between the head member and the plate is variable. FIG. 1 is an arrow view showing the relationship between the components, and FIG. 2 is a cross-sectional view for explaining the structure of the angle adjusting means.
[0011]
Since the implant member according to the present embodiment is embedded in a living body, the implant member is entirely composed of a biocompatible material, for example, a titanium alloy. As shown in FIG. 1, a lag screw 33 having a screw portion at the tip, and the lug The femoral head shaft member 10 is constituted by the femoral tube 32 into which the lower end of the screw 33 is inserted, and the angle adjustment is performed so that the angle between the upper end portion of the plate 11 and the lower end portion of the femoral tube 32 can be changed. It is connected in the shape of a “<” via the means 20.
[0012]
The angle adjusting means 20 is configured as shown in FIG. That is, the connecting shaft 123 is coupled to the lower end portion of the femoral tube 32 so that the femoral tube 32 and the connecting shaft 123 can rotate integrally, and the connecting shaft can freely enter and exit the upper end portion of the plate 11. A bearing portion 124 having a portion 124 a is formed so as to rotatably support the connecting shaft 123, and a female screw bolt hole 125 penetrating to the inner surface of the bearing portion 124 is formed and fitted into the bolt hole 125. When the fixing bolt 125a is screwed in, the front end portion 125b of the fixing bolt 125a protrudes toward the open portion 124a of the bearing portion 124, and the connecting shaft 123 is pressed against the inner surface of the bearing portion 124 to be fixed by a frictional force. Contrary to the present embodiment, the same effect can be obtained by forming the bearing portion 124 at the lower end portion of the femoral tube 32 and connecting the connecting shaft 123 to the upper end portion of the plate 11 .
[0013]
An example in which the implant member of FIG. 1 is used for a femoral fracture will be described with reference to FIG. As shown in FIG. 3, a case is assumed in which a fracture occurs in the neck 18. The connecting shaft 123 coupled to the lower end portion of the femoral tube 32 is fitted into the bearing portion 124 formed on the upper end portion of the plate 11 from the opening portion 124a , and then the connecting shaft 123 can freely rotate in the bearing portion 124 with fingers or the like. The fixing bolt 125a is lightly tightened to such an extent that does not come off. Then, the bone head 15 separated from the diaphysis 16 by fracture is pressed against the diaphysis 16, drilled at a predetermined angle using a drill and a tap, and a lag screw 33 fitted into the femoral tube 32 is inserted into the hole. Insert and screw into bone head 15. Before completely tightening the lag screw 33, the plate 11 is moved by fingers or the like to adjust the angle, and after confirming that the plate 11 is parallel to the surface of the diaphysis 16, the fixing bolt 125a is completely tightened. Then, the angle formed between the femoral tube 32 and the plate 11 is fixed, and then the lag screw 33 is completely tightened to bring the plate 11 into close contact with the surface of the diaphysis 16, and the screw fitting hole 14 formed in the plate 11 in advance. Then, the screw is screwed into the diaphysis 16 and the plate 11 is fixed along the surface of the diaphysis 16.
[0014]
Incidentally, the femoral head for shaft member 10 is not limited to the combination of the femur tube 32 and lag screw 33 shown in FIG. 1, instead of the femur tube, of various forms as shown in FIGS. 7-9 A lag screw fixing member 132 can also be used. The shape of the lag screw fixing member 132 is prepared in a wide shape (FIG. 7 ), a triangular shape (FIG. 8 ), a rectangular shape (FIG. 9 ), etc. so that the most suitable one can be selected for each patient. It is preferable to keep it. The number of the lag screw to be used in pairs with these lag screws fixing member 132 is not necessarily limited to one, it may be desirable to use a plurality, depending on the individual patient, e.g., FIGS. 8 and 9 As shown in Fig. 2, two and three lag screw engaging holes 133 are provided in the lag screw fixing member 132 so that a plurality of lag screws can be screwed and fixed to the bone head through the engaging holes 133. It is also preferable to keep it.
[0015]
As described above, by using the implant member of the present invention (Claim 1) , the angle of the conventional example 2 can be changed. In addition to being able to prevent lifting, a femoral tube (or lag screw fixing member) and a plate can be appropriately combined during surgery, so that an implant member of the size and shape most suitable for an individual patient compared to Conventional Example 2 Can be used.
[0016]
【The invention's effect】
According to the present invention (Claim 1) , the plate and the head member for the head of the head are connected via the connecting means so that the angle between them can be changed, and the plate and the shaft member for the head of the head are connected with a simple structure. Since it is configured to be detachable, the plate or the shaft member for the head of the bone can be used appropriately even if there are individual differences in the size and shape of the bone head and diaphysis itself, or even if the site and degree of fracture differ in each case In addition to being able to replace the combination that best suits the individual patient, the angle between the plate and the shaft for the head during surgery is determined according to the angle between the bone head and diaphysis, which varies between individuals. Can be adjusted freely and fixed at any angle .
[Brief description of the drawings]
FIG. 1 is an arrow view showing the relationship between components of an implant member of the present invention (Claim 1 ).
FIG. 2 is a cross-sectional view of the angle adjusting means of the implant member of the present invention (Claim 1 ).
FIG. 3 is a cross-sectional view showing a state in which the implant member of the present invention (Claim 1 ) is attached to the femur.
FIG. 4 is a cross-sectional view showing a state in which the implant member of Conventional Example 1 is attached to the femur.
FIG. 5 is a front view showing an implant member of Conventional Example 2.
6 shows an angle adjusting means constituting the implant member of the conventional example 2, is a CC sectional view of (a) BB sectional view of FIG. 5, the (b) and (c) 6 (a).
Figure 7 shows an example of embodiment of the lag screw fixing member, (a) represents a front view, (b) is a side view, (c) is a plan view.
FIG. 8 shows an example of another form of the lag screw fixing member, where (a) is a front view, (b) is a side view, and (c) is a plan view.
FIG. 9 shows an example of another form of the lag screw fixing member, (a) is a front view, (b) is a side view, and (c) is a plan view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Shaft head shaft member, 11 ... Plate , 13 ... Screw member (Cancellus screw), 14 ... Screw engaging hole (screw hole), 15 ... Femoral head, 16 ... Femoral shaft, 17 ... Large Trochanter, 18 ... femoral neck , 20 ... angle adjusting means (adjustable unit) , 3 2 ... femoral tube, 33 ... lag screw, 34 ... connecting shaft, 35 ... first actuating member, 35a ... knob ( angle adjustment screw), 35b ... male screw, 36 ... second actuating member, 36a ... protrusion, 36b ... female screw, 36c ... recess 1 23 ... connection shaft, 124 ... bearing portion, 124a ... opening, 125 ... bolt Hole, 125a ... Fixing bolt, 125b ... Tip, 132 ... Lug screw fixing member, 133 ... Lug screw engagement hole

Claims (1)

  1. A head member embedded in the femoral head; and a plate connected to the lower end portion of the head member and fixed along the outer surface of the femoral shaft; the upper end portion of the plate and the head The implant member in which the lower end portion of the shaft member for use is connected via a connecting means so that the angle formed by each other can be changed, and the angle adjusting means is provided at the connecting portion, wherein the angle adjusting means is A bearing shaft having a connecting shaft as the connecting means is integrally joined to one of the lower end portion of the shaft member for the head and the upper end portion of the plate, and the other member has an open portion that allows the connecting shaft to be taken in and out. A bolt hole having a female screw that penetrates to the inner surface of the bearing portion, and a male screw that engages with the female screw is formed. Belt is provided, when the fixing bolt is tightened, the femur, characterized in that it is configured so that its tip is fixed against the connecting shaft with protruding to the opening side of the bearing portion Implant member for osteosynthesis.
JP2001215439A 2001-07-16 2001-07-16 Implant member for femoral osteosynthesis Active JP4015828B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001215439A JP4015828B2 (en) 2001-07-16 2001-07-16 Implant member for femoral osteosynthesis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001215439A JP4015828B2 (en) 2001-07-16 2001-07-16 Implant member for femoral osteosynthesis

Publications (2)

Publication Number Publication Date
JP2003024344A JP2003024344A (en) 2003-01-28
JP4015828B2 true JP4015828B2 (en) 2007-11-28

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JP2001215439A Active JP4015828B2 (en) 2001-07-16 2001-07-16 Implant member for femoral osteosynthesis

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Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7951176B2 (en) 2003-05-30 2011-05-31 Synthes Usa, Llc Bone plate
DE20321551U1 (en) 2003-08-26 2007-12-27 Synthes Gmbh Bone plate
US8574268B2 (en) 2004-01-26 2013-11-05 DePuy Synthes Product, LLC Highly-versatile variable-angle bone plate system
US7229445B2 (en) 2004-06-21 2007-06-12 Synthes (Usa) Bone plate with bladed portion
GB0505505D0 (en) * 2005-03-17 2005-04-27 Dall Desmond Meiring Configurable bone fixation system
JP2008237593A (en) * 2007-03-27 2008-10-09 Homuzu Giken:Kk Orthopedic implant
US8926611B2 (en) 2009-09-14 2015-01-06 Zimmer Gmbh Angular lag implant for intramedullary nails
DE102013104887A1 (en) * 2013-05-13 2014-11-13 Aap Implantate Ag Osteosynthesis plate and system for osteosynthesis
JP6162735B2 (en) * 2015-02-25 2017-07-12 株式会社オーミック Bone retainer and osteosynthesis reinforcement provided with the same
ITUA20162633A1 (en) * 2016-04-15 2017-10-15 Orthofix Srl Internal fixation device plate for pediatric correction of severe bone malformations

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