JP4572301B2 - Fixture and fixture set - Google Patents

Description

  The present invention relates to a fixture and a fixture set for fixing a fracture piece in a required reduction posture.

For example, when the distal part of the rib is fractured, after attaching one end side of the plate member formed by molding a metal material into a band plate to the distal part of the fractured bone with an attachment strip such as a screw or nail, the rib The distal portion is reduced to a required posture, and then the other end side of the plate member is attached to the rib main body with a mounting strip, thereby fixing the fractured distal portion of the rib in the reduced posture.
As a fixture including such a plate member and a mounting strip, Patent Document 1 described below discloses the following.

  That is, the one end side of the strip plate-like plate member has a substantially tongue-like shape in plan view, and a plurality of insertion holes through which the mounting strip is inserted through the peripheral edge portion of the one end portion pass through the plate member. And opened at an appropriate distance in the circumferential direction of one end. In addition, a plurality of insertion holes are formed at appropriate intervals on the substantially central axis of the plate member on the other end side of the plate member.

Then, after inserting the mounting strip through each insertion hole on one end side of the plate member, entering the distal end side of each mounting strip into the fractured piece until the one end is pressed against the bone fragment, The fracture piece is reduced to the required posture, and then the mounting strip is passed through each insertion hole of the other end of the plate member, and the distal end side of each mounting strip is broken into the bone main body. The other end was entered until it pressed against the bone body.
JP 2006-326303 A

However, such a conventional fixture has the following problems.
FIG. 10 is a schematic side cross-sectional view showing a state in which a fracture piece is fixed using a conventional fixing tool, in which 120 is a plate member.
As shown in FIG. 10, the plate member 120 is bent in a substantially square shape when viewed from the side at an appropriate distance from one end of the plate member 120, and the other side opposite to the bent one side is a fracture piece. .. Are attached to the fracture piece Bp and the bone body Bm by the mounting strips 50, 50,... That are brought into contact with the Bp and the bone body Bm and pass through the insertion holes 230 provided in the plate member 120 as described above. .

  In such a fixture, since the mounting strip 50 attached to the fracture piece Bp is only inserted through the insertion hole 230 of the plate member 120, the posture of the mounting strip 50 can be kept constant. In addition, there is a problem that rattling occurs between the plate member 120 and the mounting strip 50, and the fracture piece Bp cannot be prevented from deviating from the required reduction posture S indicated by the broken line.

  On the other hand, a female screw is provided in the through hole, and a male screw is provided on the peripheral surface of the mounting strip, and the mounting strip is fixed to the plate member by screwing the mounting strip into the through hole. Fixtures have been developed to make it happen.

However, in such a fixing tool, a gap is easily generated between the plate member and the bone, and in this case, the bone cannot be supported by the plate member, and thus the above-described effect as the fixing tool cannot be achieved.
In addition, the conventional fixture has another problem.

  That is, the plate member 120 needs to be bent following the shape of the patient's bone. On the other hand, as described above, after one end of the plate member 120 is attached to the fracture piece Bp by the attachment strip 50, the fracture piece Bp In order to bend the plate member 120 into a shape that follows the shape of the bone after reduction, the mounting strip 50 and the plate member 120 attached to the fracture piece Bp are removed from the fracture piece Bp. After the adjustment of the bending angle, the plate member 120 must be attached to the fracture piece Bp again by the mounting strip 50, and the bending angle adjustment work is complicated, and the attachment is performed on the fracture piece Bp. When the operation of attaching / detaching the strip 50 is repeated, the attachment strength of the attachment strip 50 to the fracture piece Bp is lowered.

  The present invention has been made in view of such circumstances, and it is possible to prevent the fracture piece from deviating from a required reduction posture, and without reducing the attachment strength of the strip material for attachment to the fracture piece. Provided are a fixture and a fixture set capable of easily adjusting a bending angle.

  (1) The invention described in claim 1 includes a plate member attached from a fractured bone body to a fracture piece, and a leg portion suspended from the head, and the plate member is attached to the bone body or the fracture piece. A fixing member for fixing the fracture piece to a desired posture by a plate member attached to the bone body and the fracture piece with each attachment stripe material, and attached to at least the fracture piece of the plate member A plurality of notches for inserting the heads of the mounting strips are provided at appropriate positions of the edge portions of the regions, and at least the plate members are attached to the heads of the mounting strips to be attached to the fracture pieces. A clamping portion for clamping the member is provided.

  After the leg portion of the mounting strip constituting the fixture according to the present invention is embedded in the required position of the fracture piece, the head portion of the mounting strip is fitted into the notch portion of the plate member, and is provided on the head portion. The periphery of the notch portion of the plate member is sandwiched and fixed by the sandwiched portion. In this state, the fracture piece is reduced to the required posture, the angle at which the plate member is bent is obtained, the fracture piece is returned to the original state, the plate member is extracted from the clamping portion of each mounting strip, and the extracted plate member is removed. Bend. The plate member is clamped and fixed to the clamping portion of each mounting strip in the same manner as before. And a plate member is attached to a bone main body with the strip for attachment.

In this way, since the plate member can be attached and detached with each mounting strip attached to the fracture piece, the bending angle of the plate member can be easily adjusted without reducing the mounting strength of the mounting strip to the fracture piece. Can be implemented.
Further, since the plate member is clamped and fixed to the clamping portion of each mounting strip, the posture of the mounting strip fixed to the fracture piece can be forced to be constant, and the plate member and the mounting strip can be Occurrence of play in the meantime is reduced as much as possible, and the fracture piece is prevented from deviating from the required reduction posture.

(2) The invention according to claim 2 is the invention according to claim 1, wherein at least the periphery of the notch portion of the plate member or the portion facing the notch portion is prevented from coming off the mounting strip inserted into the notch portion. It is characterized in that a disconnection preventing means is provided.
This prevents the plate member from being pulled out from the holding portion of the mounting strip attached to the fracture piece, so that the treatment after the fracture piece is reduced to the required posture can be performed smoothly. .

(3) The invention described in claim 3 is the portion according to claim 2, wherein a female screw is provided around the notch portion of the plate member, and is a head portion of the mounting strip that is opposed to the female screw. Further, a male screw that is screwed with the female screw is provided.
As described above, the plate member whose bending angle is adjusted is sandwiched between the sandwiching portions of the mounting strips in which the leg portions are embedded in the fracture pieces. In the present invention, a female screw is provided around the notch portion of the plate member, and a male screw that engages with the female screw at a portion of the head of the mounting strip facing the female screw. Is provided. Then, the male screw of the mounting strip is screwed into the female screw of the plate member.
Thereby, since the strip for mounting and the plate member can be fixed, it is possible to prevent the plate member from being pulled out from the clamping portion of the strip for mounting attached to the fracture piece.

(4) The invention described in claim 4 is the portion of the plate member according to claim 2, which is opposed to the notch portion of the plate member, and is located at a position spaced a predetermined distance from the bottom of the notch portion. A narrow portion having a narrower width than the width of the other portion is provided, and the sandwiching portion is connected by a rod portion that fits the first sandwiching portion and the second sandwiching portion arranged opposite to each other into the notch portion. In the rod portion, a portion having a diameter smaller than that of the narrow portion and a portion having a diameter larger than that of the narrow portion are provided at different positions in the circumferential direction of the rod portion. It is characterized by being.
In the fixing device of the present invention, the small diameter portion of the rod portion constituting the head of the mounting strip is aligned, and the notch portion of the plate member is used as the clamping portion of the mounting strip. After fitting the rod portion of the material beyond the narrow width portion of the notch until it reaches the bottom of the notch, the mounting strip is rotated.
As a result, the large-diameter portion of the rod portion abuts against the narrow width portion of the notch portion and is prevented from retreating, so that the plate member can be prevented from coming off from the clamping portion.

(5) The invention according to claim 5 is the invention according to claim 2, wherein a convex portion (concave portion) is provided around the notch portion of the plate member, and is a head portion of the mounting strip. A concave portion (convex portion) that fits into the convex portion (concave portion) is provided in a portion facing the convex portion (concave portion).
In the fixture of the present invention, a convex portion (concave portion) provided around the notch portion of the plate member, and a head portion of the mounting strip that faces the convex portion (concave portion) of the plate member Since the concave portions (convex portions) provided in each other are fitted to each other, the plate member can be prevented from coming off from the clamping portion as before.

(6) The invention according to claim 6 includes a plate member attached from the fractured bone body to the fracture piece, and a leg portion suspended from the head, and the plate member is attached to the bone body or the fracture piece. A fixing member for fixing the fracture piece to a desired posture by a plate member attached to the bone body and the fracture piece with each attachment stripe material, and attached to at least the fracture piece of the plate member A plurality of notches for inserting the heads of the mounting strips are provided at appropriate positions of the edge portions of the regions, and the heads of the mounting strips are provided at portions facing the notches of the plate member. It is characterized in that a clamping groove is provided for clamping the edge of the.
Further, at least an appropriate position of the clamping groove of the plate member is provided with a slip prevention means for preventing the mounting strip inserted in the clamping groove from slipping out.
Further, a convex portion (concave portion) is provided at an appropriate position of the clamping groove of the plate member, and the convex portion is provided at a portion of the head of the mounting strip facing the convex portion (concave portion) of the plate member. A concave portion (convex portion) that fits into the portion (concave portion) is provided.

After embedding the leg portion of the mounting strip constituting the fixture of the present invention at the required position of the fracture piece, the head of the mounting strip is fitted into the notch portion of the plate member, and the notch portion of the plate member is inserted. The edge portion of the head portion of the mounting strip is sandwiched and fixed in the holding groove provided in the facing portion.
As in the previous case, the plate member can be attached and detached with each mounting strip attached to the fracture piece, so that the bending angle of the plate member can be easily adjusted without reducing the mounting strength of the mounting strip to the fracture piece. Can be implemented.
Further, since the head of each mounting strip is clamped and fixed to the clamping portion of the plate member, the posture of the mounting strip fixed to the fracture piece can be forced to be constant, and the plate member and the mounting strip can be forced. Occurrence of looseness with the material is reduced as much as possible, and the fracture piece is prevented from deviating from the required reduction posture.
Further, at least an appropriate position of the sandwiching groove of the plate member is provided with a slip prevention means for preventing the stripping member inserted in the sandwiching groove from being pulled out, so that the mounting strip attached to the fracture piece is sandwiched. The plate member is prevented from being pulled out from the portion, and the treatment after the fracture piece is reduced to the required posture can be smoothly performed.
Furthermore, a convex portion (concave portion) provided at an appropriate position of the sandwiching groove of the plate member, and a concave portion (convex portion) provided at a portion of the head of the mounting strip facing the convex portion (concave portion) of the plate member. Part), the head portion of the mounting strip is prevented from being pulled out from the holding groove of the plate member as before.

( 7 ) The invention according to claim 7 is the invention according to claim 6 , wherein a female screw is provided at an appropriate position of the holding groove of the plate member, and is a head portion of the mounting strip and is opposed to the female screw. The portion is provided with a male screw that is screwed into the female screw.
In the fixing device of the present invention, a female screw provided at an appropriate position in the holding groove of the plate member and a male screw provided at a portion of the head of the mounting strip facing the female screw are screwed together. Since the mounting strip and the plate member can be fixed, it is possible to prevent the head of the mounting strip mounted on the fracture piece from being pulled out of the clamping groove of the plate member.

( 8 ) The invention according to claim 8 comprises a plurality of plate members attached from the fractured bone body to the fracture piece, and leg portions suspended from the head, wherein the plate member is the bone body or fracture piece. A plurality of mounting strips to be attached to the plate, and a plate member selected from the plate members is mounted to the bone body and the fracture piece with the respective mounting strips, and the fracture piece is fixed to a desired posture by the plate member. It is a fixture set, Comprising: The plate member in any one of Claim 1 to 7 and the strip for attachment are provided, and each plate member is attached to the bone fragment main part and the 2nd part attached to a bone main body. The angle of the first angle formed by the first part and the second part in a side view and / or the angle of the second angle formed by the first part and the second part in a plan view are The plate member is different Was characterized in that are.

  The fixture set of the present invention includes various plate members having different angles of the first angle and / or the second angle, while reducing the mounting strength of the mounting strip to the fracture piece as described above. Since the plate member can be easily attached and detached without changing the plate member to the plate member having the required bending angle, the work of bending the plate member can be omitted, and the fracture piece can be fixed quickly.

(First embodiment of the present invention)
FIG. 1 is a perspective view showing a main configuration of a fixture according to the present invention.
As shown in FIG. 1, the fixture 1 includes a plate member 2 that supports a fracture piece, and an attachment strip 3 for attaching the plate member 2 to the fracture piece.
The plate member 2 described above is formed by molding a metal plate into a substantially T shape in plan view, and is provided with a first support portion 21 attached to a fracture piece and a second support portion 22 attached to the fractured bone body. ing.

  A plurality of (three in FIG. 1) insertion holes 24, 24,... Are spaced apart from each other on a substantially central axis parallel to the longitudinal direction of the belt-like second support portion 22. It is opened in such a manner that it penetrates the portion 22, and each mounting hole 24, 24,... Has other mounting strips 5 such as screws and nails that hang a leg portion on the head (see FIG. 3). Each is inserted.

  Further, the first support portion 21 described above is provided with a first support portion main body 21a having a substantially rectangular shape in plan view so that the second support portion 22 communicates from a substantially central position of one long side portion thereof. The angle of the first angle R1 formed by the first support body 21a and the second support 22 in the view and the second angle R2 formed by the first support body 21a and the second support 22 in the plan view are respectively The angle is set appropriately.

  On the other long side portion side of the first support portion main body 21a, a plurality of (four in FIG. 1) cutout portions 23, 23,... Cut out so as to be substantially U-shaped in plan view. .. Are provided at appropriate intervals in the long side direction of the first support body 21a, and each of the notches 23, 23,... Has a central axis passing through the center position in the width direction of the notch 23. It is parallel to the central axis of the portion 22. Moreover, the part which faces the notch parts 23,23, ... of the 1st support part main body 21a is made into the taper.

  On the other hand, the mounting strip 3 according to the present invention is provided with a head 30 at one end of a rod-like leg 35, and the head 30 holds the first support 21 of the plate member 2 described above. It has. The above-described leg portion 35 is formed with a screw thread on the peripheral surface of the rod body, and as will be described later, the leg portion 35 can be screwed into the fracture piece so that the fracture piece can be pressed against the plate member 2.

In addition, the sandwiching portion 34 has a first sandwiching portion 31 and a second sandwiching portion 32 in the form of flat plates on both ends of the rod portion 33 having a length dimension adjusted so that the first support portion main body 21a can be sandwiched. The sandwiching portion 31 and the second sandwiching portion 32 are provided so as to be parallel to each other, and the leg portion 35 extends from the second sandwiching portion 32 of the sandwiching portion 34 to the central axis of the leg portion 35 on the central axis of the rod portion 33. It is suspended so that is located.
The diameter of the rod part 33 is slightly smaller than the width dimension of the notch part 23 described above, so that the mounting strip 3 can be smoothly fitted to the bottom part of the notch part 23.

  In the present embodiment, the first sandwiching portion 31 and the second sandwiching portion 32 are provided so as to be parallel to each other. However, the present invention is not limited to this, and the plate is formed according to the shape of the plate member 2. What is necessary is just to determine the shape and arrangement | positioning of the 1st clamping part 31 and the 2nd clamping part 32 so that the member 2 can be clamped. Moreover, the part which faces the notch parts 23,23, ... of the 1st support part main body 21a is made into the taper, and there is no taper corresponding to the said taper in the part facing the 2nd clamping part 32 of the 1st clamping part 31. However, the present invention is not limited to this, and both the corresponding parts of the first support body 21a and the first clamping part 31 may be made flat.

Next, a method for fixing a fractured piece using the fixing tool 1 according to the present invention will be described.
2 and 3 are explanatory views for explaining a procedure for fixing a fractured piece using the fixing tool 1 shown in FIG. In the figure, parts corresponding to those shown in FIG.
The position for attaching the attachment strips 3, 3,... To the fracture piece Bp is determined using a positioning jig prepared in advance according to the shape of the plate member 2.

  As shown in FIG. 2 (a), the legs 35 (35,...) Of the mounting strips 3, 3,... , 3,... Are screwed in until the second sandwiching portions 32 (32,...) Abut against the fracture piece Bp, and then the rod portions 33 (33,...) Of the respective mounting strips 3, 3,. The rod members 33 (33,...) Are inserted into the notches 23, 23,... Of the member 2 until they contact the bottoms of the notches 23, 23,. The plate member 2 is clamped and fixed to the clamping part 34 (34,...).

As shown in FIG. 2B, the fracture piece Bp is reduced in this state, and the first support portion 21a and the second support portion 22 formed by the first support portion main body 21a and the second support portion 22 in a side view with respect to the required reduction posture S. Register the correction angle of the angle R1.
Then, the fracture piece Bp is returned to the original state, and the plate member 2 is extracted from the holding portions 34 (34,...) Of the respective mounting strips 3, 3,..., And the angle of the first angle R1 of the extracted plate member 2 is obtained. The plate member 2 is bent by the bender device so that becomes a correction angle.

Next, as shown in FIG. 3 (c), the plate member 2 with the first angle R1 bent to the required correction angle is held in the same manner as before, and the holding portions 34 ( 34,...) And the fracture piece Bp is reduced to a required reduction posture S.
In this way, since the plate member 2 can be attached and detached with the respective mounting strips 3, 3,... Attached to the fracture piece Bp, the mounting strength of the mounting strips 3, 3,. Without this, the bending angle of the plate member 2 can be adjusted easily.

  Then, as shown in FIG. 3 (d), other attachment strips 5,5,... Such as screws and nails are inserted through the insertion holes 24, 24,. The plate member 2 is fixed to the bone main body Bm by causing the materials 5, 5,... To enter the fractured bone main body Bm, and the fracture piece Bp is fixed to the required reduction posture S by the plate member 2.

  At this time, since the plate member 2 is clamped and fixed to the clamping portions 34 (34,...) Of the respective mounting strips 3, 3,..., There is no play between the plate member 2 and the mounting strip 3. Generation | occurrence | production is reduced as much as possible, and the attitude | position of the strip 3 for attachment is forced to be fixed, and the fracture piece Bp is prevented from deviating from the required reduction posture S.

  By the way, in the fixture 1 according to the present invention, the plate member 2 can be attached and detached without lowering the attachment strength of the attachment strips 3, 3,. Thus, by using a fixture set that includes a plurality of types of plate members in advance, the bending angle adjustment work by the bender device can be eliminated.

  FIG. 4 is an explanatory view for explaining a plate member provided in the fixture set according to the present invention, and FIG. 4 (a) is a first view formed by the first support body 21 a and the second support section 22 in a side view. FIG. 4B shows the case where the angle of the first angle R1 is made different, and FIG. 4B shows the case where the angle of the second angle R2 formed by the first support part main body 21a and the second support part 22 in plan view is made different. ing.

  Even if the bones are the same part, there are individual differences in their shapes. Therefore, as shown in FIGS. 4 (a) and 4 (b), the first support part body 21a and the second support part 22 in the side view are shown in FIGS. The plurality of plate members 2, 2,..., And / or the angle of the second angle R2 formed by the first support body 21a and the second support 22 in a plan view. Are prepared in advance.

Then, as shown in FIG. 3C, the plate member 2 having the first angle R1 and / or the second angle R2 is exchanged according to the shape of the bone to be reduced.
As described above, according to the fixture set including a plurality of types of plate members 2, 2,..., The adjustment operation of the bending angle of the plate member 2 by the bender device can be eliminated, and the fixation operation of the fracture piece Bp can be performed quickly. It can be carried out.

In addition, in this Embodiment, although the thread part formed the thread part over the substantially whole length of the longitudinal direction of the rod body is used for the peripheral surface of the rod body, this invention is not restricted to this, You may use the leg part 35 which provided the screw thread in a part of longitudinal direction, for example, a front-end | tip part.
Moreover, in the case shown in FIG. 1, although the 1st clamping part 31 and the 2nd clamping part 32 of the strip 3 for attachment are made into disk shape, this invention is not limited to this but is polygonal shape. Needless to say, it may be.

(Second embodiment of the present invention)
5 and 6 are partial enlarged views of the fixture according to the second embodiment of the present invention so that the plate member 2 can be prevented from coming off from the holding portion 34 provided in the mounting strip 3. It is. In the case shown in FIG. 5, the case where the mounting strip 3 is screwed to the plate member 2, and in the case shown in FIG. Respectively. In each figure, the same reference numerals are given to the portions corresponding to the portions shown in FIG. 1, and the description thereof is omitted.

As shown in FIG. 5 (a), a male screw 33a is provided on the peripheral surface of the rod portion 33 of the mounting strip 3 and connected to the first clamping portion 31 as a means for preventing removal. A female screw as an anti-disengagement means that is a region facing the bottom of the notch 23 of the plate member 2 and that is engaged with the male screw 33a at a portion of the holding part 34 that holds the plate member 2 that faces the male screw 33a. 25 is provided.
Further, in the case shown in FIG. 5B, a male screw 31 a is provided on the peripheral surface of the first clamping part 31 of the mounting strip 3.

  These male screws 33a and 31a are provided, for example, by ½ pitch. After the plate member 2 is clamped by the clamping part 34 by this, the mounting member 3 is tightened by ½ rotation, thereby the male screw 33a. 31a and female screws 25, 25 are screwed and fixed to prevent the plate members 2, 2 from coming off from the holding portions 34, 34.

  On the other hand, in the case shown in FIG. 6 (a), guide surfaces 23a and 23a for guiding the rod portion 33 of the mounting strip 3 are arranged opposite to the portion facing the notch portion 23 of the plate member 2. Protruding portions 23b, 23b are provided at appropriate distances from the bottoms of the cutout portions 23 of both guide surfaces 23a, 23a, so that the width dimension between both guide surfaces 23a, 23a is narrower than the width dimension of other portions. A narrow width region 23c is formed.

  A flange portion parallel to each other is provided on the outer peripheral surface of the rod portion 33 of the mounting strip 3, and a small diameter portion 33b having a relatively small diameter is formed, and a portion other than the small diameter portion 33b has a relative diameter. A large large-diameter portion 33c is formed. The diameter of the small diameter portion 33b of the rod 33 is slightly smaller than the size between the narrow regions 23c of the notch 23, and the diameter of the large diameter portion 33c of the rod 33 is larger than the size between the narrow regions 23c. It is slightly smaller than the width dimension of the notch 23.

  In such a fixture, the notch portion 23 of the plate member 2 in a state in which both flange portions constituting the small diameter portion 33b of the mounting strip 3 and the guide surfaces 23a, 23a of the plate member 2 are parallel to each other. Is fitted into the holding portion 34 of the mounting strip 3 until the rod portion 33 of the mounting strip 3 reaches the bottom of the notch 23 beyond the projections 23b, 23b, and then the mounting strip 3 Rotate halfway. Accordingly, the large-diameter portion 33c of the rod portion 33 abuts against the protruding portions 23b and 23b and is prevented from moving backward, so that the plate member 2 can be prevented from coming off from the clamping portion 34.

  It should be noted that the above-described protrusions 23b and 23b are configured such that, for example, the plate member 2 can be retracted and advanced from the plate member 2, thereby using the mounting strip 3 that does not include the small-diameter portion 33b. Even in this case, the plate member 2 can be prevented from coming off from the holding portion 34 as before.

6B, the rod portion 33 of the mounting strip 3 is inserted into the cutout portion 23 of the plate member 2 until the rod portion 33 reaches the bottom of the cutout portion 23. The protrusions 31c (or the recesses 31d) and the recesses on the back surface of the first clamping part 31 of the mounting strip 3 and the parts facing the first clamping part 31 of the plate member 2 so as to be fitted to each other. 26 (or convex part 27) is provided.
As a result, the convex portion 31c (or the concave portion 31d) and the concave portion 26 (or the convex portion 27) are fitted, so that the plate members 2 and 2 can be prevented from coming off from the sandwiching portions 34 and 34 as before. .
In addition, you may provide the convex part 31c (or recessed part 31d) and the recessed part 26 (or convex part 27) mentioned above in the part facing the 2nd clamping part 32 and the 2nd clamping part 32 of the plate member 2. FIG.

(Third embodiment of the present invention)
7 and 8 are partially broken partial enlarged perspective views of the fixture according to the third embodiment of the present invention, in which a part of the mounting strip 3 is clamped by the plate member 2. . In the figure, parts corresponding to those shown in FIG.

  As shown in FIG. 7, the mounting strip 3 has a leg portion 35 with a thread formed on the peripheral surface at the center of the back surface of the head 30. The head 30 is provided with a flange-like portion on the periphery of the screw head main body so as to have a substantially convex side view, and the flange-like portion is a male screw portion 30b serving as a removal preventing means.

  On the other hand, the inner portions 23d and 23d and the inner bottom portion 23e facing the notch portion 23 of the plate member 2 have a shape corresponding to the shape of the head portion 30 of the mounting strip 3, and guide the head portion 30. A clamping groove 23f that clamps the peripheral edge of the head 30 is formed in a substantially U shape over the entire region. Further, a female screw portion 23g is formed on the inner bottom portion 23e of the holding groove 23f and its peripheral portion as a means for preventing the male screw portion 30b of the head 30 from being screwed together.

  Then, after attaching the mounting strips 3, 3, 3 to the fracture piece so that the heads 30, 30, 30 protrude from the fracture piece by a predetermined dimension, the plate member 2 is attached to the mounting strips 3, 3. 3, male screw portions 30 b, 30 b, 30 b, which are peripheral portions of the head portions 30, 30, 30, are fitted into the holding grooves 23 f, 23 f, 23 f of the notches 23, 23, 23, and the holding grooves 23 f , 23f, and 23f by sliding the male screw portions 30b, 30b, and 30b of the head portions 30, 30, and 30 until they contact the inner bottom portions 23e, 23e, and 23e, and the plate member 2 and the mounting strip 3 , 3, 3, and then tightening the mounting strips 3, 3, 3, the male screw portions 30 b, 30 b, 30 b of the heads 30, 30, 30 are connected to the female screw portions 23 g, 23 g, 23 g. And the mounting strips 3, 3, 3 and the plate member 2 To fix.

  As a result, the fracture piece into which the mounting strips 3, 3, and 3 are screwed can be firmly fixed to the plate member 2, and the heads 30, 30 of the mounting strips 3, 3, and 3 can be secured. , 30 are clamped and fixed in the clamping grooves 23f, 23f, 23f of the plate member 2, the posture of the mounting strips 3, 3, 3 is forced to be constant, and the mounting strips 3, 3, 3, Generation | occurrence | production of the play between plate members 2 is reduced as much as possible, and it is prevented that a fracture piece shifts from a required reduction posture. Further, since the mounting strips 3, 3, 3 and the plate member 2 are fixed, the mounting strips 3, 3, 3 are prevented from coming off from the notches 23, 23, 23 of the plate member 2. The

  On the other hand, in the case shown in FIG. 8, instead of the female screw portion 23g and the male screw portion 30b shown in FIG. A recess 23i is provided at a position separated from the inner bottom 23e by a predetermined distance as a means for preventing the protrusion 30c from fitting. Then, the plate member 2 and the mounting strip 3 are fitted by inserting the peripheral portion of the head 30 into the holding groove 23f and sliding the head 30 until the inside of the holding groove 23f comes into contact with the inner bottom 23e. And then the mounting strip 3 is rotated to fit the convex portion 30c of the head 30 into the concave portion 23i of the clamping groove 23f, thereby fixing the mounting strip 3 and the plate member 2 together. I am letting.

  In the fixture shown in FIG. 8, the projection 30 c is formed on the head 30 and the recess 23 i is formed on the holding groove 23 f. However, the present invention is not limited to this. It goes without saying that a concave portion may be formed in the portion 30 and a convex portion that fits into the concave portion may be provided in the holding groove 23f.

  By the way, in the fixture of such a structure, after the plate member 2 and the mounting strip 3 are fitted, the mounting strip 3 is further tightened, whereby the mounting strip 3, the plate member 2, and the fracture piece. Can be fixed to each other, so that the mounting strip 3 is prevented from being pulled out from the plate member 2. Accordingly, the peripheral portion of the head portion 30 of the mounting strip 3 is attached to the plate member 2 without providing the female screw portion 23g, the male screw portion 30b shown in FIG. 7, and the convex portion 30c and the concave portion 23i shown in FIG. A structure that is sandwiched and fixed in the sandwiching groove 23f can also be used as the fixture of the present invention.

  In the plate member 2 described in the present embodiment, as shown in FIG. 4, the first angle R1 formed by the first support body 21a and the second support 22 in a side view is different. , And / or a plurality of plate members 2 having different second angles R2 formed by the first support body 21a and the second support section 22 in plan view. Needless to say, a fixture set can be prepared by preparing 2,.

(Other embodiments)
FIG. 9 is a plan view of a fixture according to another embodiment of the present invention. Like the first support portion 21 of the plate member 2, the second support portion 22 is provided with notches 28, 28, 28. It is. In the figure, parts corresponding to those shown in FIG.

  As shown in FIG. 9, each of the first support portion 21 and the second support portion 22 of the plate member 2 includes a plurality of cutout portions 23, 23,..., 28, 28,. Are provided in a substantially arc shape except for the notch portion 23 provided on one end side of the first support portion 21, and the notch portions 23, 23,..., 28, 28,. It is arrange | positioned on the concentric circle centering on the center of the bottom part.

In such a fixture, the mounting strips 3, 3,... Shown in FIG. 1 are respectively screwed into predetermined positions of the fracture piece and the bone main body, and are provided on one end side of the first support portion 21. After fitting the notch portion 23 to the corresponding holding portion 34 of the mounting strip 3 and holding the portion facing the notch portion 23 of the first support portion 21 to the holding portion 34, the plate member 2 is attached to the mounting portion 34. The other notches 23, 23,... Of the first support portion 21 and the notches 28, 28,. ,..., And the plate member 2 is held between the holding portions 34, 34,.
Accordingly, even after the plate member 2 is fixed to the fracture piece and the bone main body, the plate member 2 can be detached with one touch.

It is a perspective view which shows the principal part structure of the fixing tool which concerns on this invention. It is explanatory drawing explaining the procedure which fixes a fracture piece using the fixing tool shown in FIG. It is explanatory drawing explaining the procedure which fixes a fracture piece using the fixing tool shown in FIG. It is explanatory drawing explaining the plate member comprised by the fixing tool set which concerns on this invention. It is the elements on larger scale of the fixing tool which concerns on the 2nd Embodiment of this invention. It is the elements on larger scale of the fixing tool which concerns on the 2nd Embodiment of this invention. It is a partially broken part expansion perspective view of the fixing tool concerning a 3rd embodiment of the present invention. It is a partially broken part expansion perspective view of the fixing tool concerning a 3rd embodiment of the present invention. It is a top view of the fixing tool concerning other embodiments of the present invention. It is a typical sectional side view which shows the state which fixed the fracture piece using the conventional fixing tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixing tool 2 Plate member 3 Mounting strip 21 1st support part 21a 1st support part main body 22 2nd support part 23 Notch part 23c Narrow area | region 23d Clamping groove 24 Insertion hole 26 Concave part 27 Convex part 30 Head part 31st 1 clamping part 31c convex part 31d recessed part 32 2nd clamping part 33 rod part 33b small diameter part 33c large diameter part 34 clamping part 35 leg part R1 first angle R2 second angle

Claims (8)

A plate member attached from the fractured bone main body to the fracture piece, and a plurality of attachment strips for attaching the plate member to the bone main body or the fracture piece, each having a leg portion suspended from the head. In a fixture for fixing a fracture piece to a required posture by a plate member attached to the bone body and the fracture piece with a mounting strip,
At least an appropriate position of a region edge portion attached to the fracture piece of the plate member is provided with a plurality of notches for inserting the heads of the attachment strips,
A fixing tool, wherein at least a head portion of a mounting strip for attaching a plate member to a fracture piece is provided with a clamping portion for clamping the plate member.   2. The fixture according to claim 1, wherein at least a part of the plate member surrounding the notch or facing the notch is provided with a slip prevention means for preventing the mounting strip inserted into the notch.   A female screw is provided around the notch of the plate member, and a male screw that is screwed with the female screw is provided in a portion of the head of the mounting strip facing the female screw. Item 3. The fixture according to item 2. A portion facing the notch portion of the plate member, a portion at a predetermined distance from the bottom portion of the notch portion, a narrow width portion having a width smaller than the width of other portions of the notch Is provided,
The sandwiching portion is formed by connecting the first sandwiching portion and the second sandwiching portion arranged opposite to each other by a rod portion that fits into the notch portion, and the rod portion has a diameter smaller than that of the narrow width portion. The fixing tool according to claim 2, wherein a portion having a diameter larger than that of the narrow width portion is provided in a different position in the circumferential direction of the rod portion.   A convex portion (concave portion) is provided around the notch portion of the plate member, and the convex portion (concave portion) is formed at a portion of the head of the mounting strip facing the convex portion (concave portion) of the plate member. The fixing tool according to claim 2, wherein a concave portion (convex portion) is provided to be fitted to. A plate member attached from the fractured bone main body to the fracture piece, and a plurality of attachment strips for attaching the plate member to the bone main body or the fracture piece, each having a leg portion suspended from the head. In a fixture for fixing a fracture piece to a required posture by a plate member attached to the bone body and the fracture piece with a mounting strip,
A plurality of notches for inserting the heads of the mounting strips are provided at appropriate positions of the region edges attached to the fracture pieces of the plate member, and the portions facing the notches of the plate member , Ri Oh and clamping groove for holding the edge of the head of the mounting strip material provided,
At least an appropriate position of the holding groove of the plate member is provided with a prevention means for preventing the attachment strip material inserted in the holding groove from coming off,
A convex portion (concave portion) is provided at an appropriate position of the holding groove of the plate member, and the convex portion (the concave portion) is formed on the head portion of the mounting strip and facing the convex portion (concave portion) of the plate member. fixture characterized by Oh isosamples provided is concave (convex) to be fitted in the recess). A female screw is provided at an appropriate position in the holding groove of the plate member, and a male screw that is screwed with the female screw is provided at a portion of the head of the mounting strip facing the female screw. The fixture according to claim 6 .   A plurality of plate members attached from the fractured bone main body to the fracture piece, and a plurality of mounting strips for mounting the plate member to the bone main body or the fracture piece. A fixture set for attaching a plate member selected from each plate member to a bone body and a fracture piece with each attachment strip, and fixing the fracture piece to a required posture by the plate member,
  A plate member and a mounting strip according to any one of claims 1 to 7,
  Each plate member comprises a first part attached to the fracture piece and a second part attached to the bone body;
  The angle of the first angle formed by the first portion and the second portion in the side view and / or the angle of the second angle formed by the first portion and the second portion in the plan view are different for each plate member. Have
Fixture set characterized by that.

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