JP2009247694A - Prosthetic appliance for prosthetic material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly supplement an osseous defect site near a joint by improving the working efficiency in supplementing a bone prosthetic material with relatively large particle size. <P>SOLUTION: A prosthetic appliance 1 for prosthetic materials is provided with: a funnel member 2 having a substantially cylindrical insertion section 4 having one end 4a inserted and placed in the osseous defect site B, and a tapered section 5 gradually enlarging its diameter from the other end of the insertion section 4 towards the tip end; and a grip member 3 detachably attached to the funnel member 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a prosthetic material-compensating device used when a bone defect is supplemented with a granular bone prosthetic material.

  Conventionally, as a bone filling material, in order to prevent inconvenience that the granules are scattered and adhere to the surrounding tissue when filling the bone defect part with β-tricalcium phosphate porous granules exhibiting good bone replacement. It has been practiced to mix with a liquid such as blood or water and fill with a cylindrical filling device (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2005-253829

  However, when the granules of β-tricalcium phosphate porous material are filled in a bone defect near the joint, granules having a relatively large particle size are used so that the granules do not flow into the joint. For this reason, the filling device shown in Patent Document 1 is suitable for fine granules, but has a disadvantage in that it cannot be filled smoothly because it is clogged with large granules.

  The present invention has been made in view of the above-described circumstances, and improves workability when supplementing a bone grafting material having a relatively large particle size, and smoothly compensates for a bone defect near the joint. It is an object to provide a filling material filling device that can be used.

In order to achieve the above object, the present invention provides the following means.
The present invention relates to a funnel member comprising a substantially cylindrical insertion portion whose one end is inserted and disposed in a bone defect portion, and a tapered portion whose diameter gradually increases from the other end of the insertion portion toward the tip, and the funnel member And a gripping member that is detachably attached to the filler.

  According to the present invention, the insertion portion at one end of the funnel member is inserted and arranged in the bone defect portion, and the bone filling material is introduced from the tapered portion side, so that even the relatively large bone filling material is clogged in the insertion portion. It is possible to compensate for the bone defect without causing it. It is possible to adjust the position of the funnel member such as the insertion depth and the insertion angle by operating the gripping member with the gripping member attached to the funnel member in a detachable manner. Further, after the position is adjusted, by removing the grasping member from the funnel member, it is possible to prevent the grasping member from interfering with a fixing pin or the like used together during the operation, and to clear the vicinity of the surgical site. Moreover, by removing the gripping member from the funnel member, the weight balance can be improved, and the funnel member can be stably placed in the surgical site even if the hand is released. As a result, both hands can be used for the compensation work, and workability can be improved.

In the said invention, it is preferable that the said funnel member is comprised with the material which can permeate | transmit X-rays.
By doing in this way, even when performing X-ray observation with the funnel member indwelled at the surgical site, the funnel member does not obstruct the field of view, and passes through the funnel member to provide an internal bone defect or bone replacement. It becomes possible to clearly check the state of the material.

Moreover, in the said invention, the said one end of the said insertion part may incline with respect to the direction orthogonal to a longitudinal direction.
By doing in this way, the filling direction of a bone grafting material can be easily adjusted by rotating a funnel member around an axis line and changing an inclination direction.

  Moreover, in the said invention, the said holding member is formed in the substantially cyclic | annular form which has an internal diameter dimension smaller than the largest diameter of the taper-shaped part of the said funnel member, and a pair of holding part which can clamp the outer edge of the said taper-shaped part to an axial direction And a pair of handle portions that extend radially outward from each grip portion and are pivotally connected by a shaft at a midway position thereof, and the grip portion disposed on the insertion portion side includes the insert portion It is good also as having a shape where one part was notched by the notch slightly larger than the outer diameter size of this.

  By doing so, the handle member is operated, the pair of substantially annular gripping portions are brought close to each other, and the outer edge of the tapered portion of the funnel member is clamped in the axial direction. Can be securely fixed. Moreover, since the notch is provided in the grip part on the insertion part side, the insertion part can be inserted / removed at a midway position in the longitudinal direction of the insertion part without inserting the grip part from the distal end side of the insertion part. Therefore, it is possible to remove the gripping member from the funnel member by passing the insertion portion through the notch while the funnel member is left in the surgical site. Further, since the gripping portion is formed in a substantially annular shape, the gripping member can be kept attached to the funnel member even if the gripping force applied to the handle portion is loosened, and it will come off against the operator's intention. This can be prevented.

Moreover, in the said invention, it is preferable that at least the said holding part of the said holding member is comprised with the material which can permeate | transmit X-rays.
By doing in this way, it can prevent that the visual field of X-ray observation is obstruct | occluded by the holding part also in the state which attached the holding member to the funnel member.

  According to the present invention, it is possible to improve workability at the time of replenishing a bone prosthetic material having a relatively large particle diameter, and to smoothly replenish a bone defect near the joint.

A filling material filling device 1 according to an embodiment of the present invention will be described below with reference to FIGS.
As shown in FIG. 1, the filling material filling device 1 according to the present embodiment includes a funnel member 2 and a gripping member 3.

  The funnel member 2 includes a cylindrical insertion portion 4 and a tapered portion 5 that gradually increases in diameter from one end of the insertion portion 4 toward the outside in the longitudinal direction. The insertion portion 4 and the tapered portion 5 are integrally formed of a material having high biocompatibility such as a tetrafluoroethylene resin and transmitting X-rays.

  The distal end surface 4 a opposite to the tapered portion 5 of the insertion portion 4 is inclined in the range of 5 ° to 60 ° with respect to the direction orthogonal to the longitudinal direction of the insertion portion 4. The insertion direction when the filling material A introduced through the insertion portion 4 is introduced into the bone defect B from the distal end surface 4a can be directed to the direction in which the distal end surface 4a is inclined (arrow in FIG. 3). It has become.

  The tapered portion 5 has a taper angle of 30 ° to 60 ° on one side around the longitudinal axis of the insertion portion 4 and has a maximum diameter of 15 mm to 40 mm. On the outer edge of the maximum diameter portion of the tapered portion 5, there is provided an edge portion 5a having a certain thickness dimension extending radially outward over the entire circumference.

  The gripping member 3 is formed in a tool shape such as pliers by intersecting two component parts 3A and 3B and connecting them so as to be relatively swingable by a shaft 3C at the intersection. Each of the two component parts 3A and 3B includes an annular gripping portion 3a and 3b at one end and an elongated handle portion 3c and 3d at the other end. In the present embodiment, each of the component parts 3A and 3B is made of a tetrafluoroethylene resin.

  As shown in FIG. 2, the gripping portions 3 a and 3 b each have an inner diameter that is slightly smaller than the outer diameter of the edge 5 a of the tapered portion 5 of the funnel member 2. The pair of gripping portions 3a and 3b are brought close to each other by swinging in the direction in which the handle portions 3c and 3d are brought close to each other, whereby the edge portion 5a of the tapered portion 5 can be sandwiched in the thickness direction. It can be done.

  One grip portion 3b is provided with a notch 6 in which a part in the circumferential direction is notched to communicate the inside and the outside of the ring. The width dimension of the notch 6 is formed to be slightly larger than the outer diameter dimension of the insertion portion 4 of the funnel member 2. Thus, when the funnel member 2 is inserted into and removed from the inside of the gripping portion 3b, it is not necessary to insert the funnel member 2 into the gripping portion 3b from the distal end surface 4a side, and the midway position in the longitudinal direction of the insertion portion 4 is notched. 6, the grip portion 3b can be inserted and removed.

The operation of the filling material compensating device 1 according to the present embodiment configured as described above will be described.
According to the filling material supplementing instrument 1 according to the present embodiment, the funnel member 2 is disposed in the one gripping portion 3b, and the worker is in contact with the tapered portion 5 of the funnel member 2 in contact with the gripping portion 3b. By gripping the handle portions 3c and 3d and bringing the pair of grip portions 3a and 3b close to each other, as shown in FIG. 2, the edge portion 5a of the tapered portion 5 of the funnel member 2 is interposed between the grip portions 3a and 3b. Can be sandwiched.

  Thereby, the holding member 3 and the funnel member 2 can be integrated only by grasping the handle portions 3c and 3d. Then, the operator can easily insert and place the distal end surface 4a of the funnel member 2 in the bone defect portion B by operating the handle portions 3c and 3d. Since the distal end surface 4a of the insertion portion 4 of the funnel member 2 is inclined, the bone grafting material A can be preferentially introduced in the inclined direction. Therefore, the operator can adjust the loading direction of the bone prosthetic material A by rotating the handle portions 3c, 3d around the axis of the funnel member 2 and appropriately adjusting the direction of the distal end surface 4a.

  Then, the operator throws in the bone filling material A, for example, β tricalcium phosphate porous granule, from the tapered portion 5 of the funnel member 2 and, as shown in FIG. By pushing the bone prosthetic material A granule with the extrusion rod 7, the position of the bone prosthetic material A granule can be moved within the bone defect B to be compensated.

  In this case, since the grip portions 3 a and 3 b of the grip member 3 have an inner diameter that is slightly smaller than the maximum diameter of the taper-shaped portion 5, the grip portion 3 is tapered even when the funnel member 2 is gripped by the grip member 3. The opening of the portion 5 is not blocked and does not obstruct the insertion of the bone grafting material A. In addition, one gripping portion 3b that supports the insertion portion 4 side of the tapered portion 5 is formed in a substantially annular shape although it is cut by a notch 6 that is slightly larger than the outer diameter of the insertion portion 4. In the state where the taper-shaped portion 5 is in contact, the funnel member 2 cannot be easily removed from the grip portion 3b. Therefore, the funnel member 2 does not come off from the grip portion 3b simply by loosening the force applied by the operator to the handle portions 3c and 3d, and is maintained in a state supported by the grip portion 3b. Therefore, it is prevented that the funnel member 2 in operation is inadvertently detached.

  Further, when the operator wants to remove the gripping member 3 from the funnel member 2, as shown in FIG. 4, the force applied to the handle portions 3c and 3d is loosened to separate the pair of gripping portions 3a and 3b. 5, the grip portion 3 b in which the notch 6 is formed is moved to a position in the longitudinal direction of the insertion portion 4, and the insertion portion 4 is gripped through the notch 6, as shown in FIG. 5. It moves outside the part 3b. Thereby, the holding member 3 can be easily removed from the funnel member 2. In this case, since it is not necessary to extract the insertion part 4 of the funnel member 2 from the holding part 3b in the longitudinal direction, the funnel member 2 can be easily removed in a state where the funnel member 2 is still inserted in the bone defect part B. .

  And since the gravity center position is arrange | positioned in the center position, the funnel member 2 after removing the holding member 3 is stably maintained in the bone defect part B in the insertion state. Further, by removing the gripping member 3, the operator does not have to hold down the funnel member 2, so that both hands are free and the workability can be improved. Further, since the handle portions 3c and 3d do not protrude around the funnel member 2 by removing the gripping member 3, the surroundings of the funnel member 2 become complicated without interfering with fixing pins (not shown). Can be prevented.

  In addition, in the present embodiment, since the funnel member 2 is made of tetrafluoroethylene resin, it can transmit X-rays. Therefore, even if X-ray observation is performed in a state where the funnel member 2 is inserted in the bone defect portion B, the funnel member 2 does not block the visual field of observation, and the state of the internal bone defect portion B In addition, it is possible to clearly observe the filling state of the bone filling material A.

  Furthermore, in the present embodiment, since the gripping member 3 is also made of tetrafluoroethylene resin, the gripping member 3 is not observed even when X-ray observation is performed with the gripping member 3 attached to the funnel member 2. Without obscuring the visual field, the state of the internal bone defect portion B and the supplementary state of the bone grafting material A can be clearly transmitted and observed.

In the present embodiment, the gripping member 3 is made of a material capable of transmitting X-rays such as tetrafluoroethylene resin. However, the present invention is not limited to this, and any other material or higher rigidity is used. You may comprise with a material. In order to perform X-ray observation with the gripping member 3 attached to the funnel member 2, at least only the gripping portions 3a and 3b may be made of a material that can transmit X-rays.
Further, the material capable of transmitting X-rays is not limited to tetrafluoroethylene resin, and any other material may be adopted.

It is a perspective view of the state which removed the funnel member and the holding member which show the filling material supplement tool which concerns on one Embodiment of this invention. FIG. 2 is a longitudinal sectional view showing a state in which a gripping member is attached to a funnel member in the filling material supplementing device of FIG. 1. It is a longitudinal cross-sectional view explaining the supplementing operation | work of the bone grafting material using the filling material compensation instrument of FIG. FIG. 2 is a longitudinal sectional view for explaining an operation of removing a gripping member from a funnel member arranged in an inserted state in a bone defect portion in the filling material compensating device of FIG. 1. It is a longitudinal cross-sectional view explaining the operation | work which pulls out a holding member from the state of FIG.

Explanation of symbols

A Bone prosthetic material B Bone defect 1 Prosthetic material prosthetic device 2 Funnel member 3 Gripping member 3C Shaft 3a, 3b Gripping part 3c, 3d Handle part 4 Insertion part 4a Tip surface (one end)
5 Tapered part 5a Edge (outer edge)
6 Notches

Claims (5)

A funnel member comprising a substantially cylindrical insertion portion, one end of which is inserted and disposed in the bone defect portion, and a tapered portion that gradually increases in diameter from the other end of the insertion portion toward the tip;
A filling material supplementing instrument comprising a gripping member detachably attached to the funnel member.   The filling material filling device according to claim 1, wherein the funnel member is made of a material capable of transmitting X-rays.   The filling material compensating device according to claim 1 or 2, wherein the one end of the insertion portion is inclined with respect to a direction orthogonal to the longitudinal direction. The gripping member is formed in a substantially annular shape having an inner diameter smaller than the maximum diameter of the tapered portion of the funnel member, and is capable of holding the outer edge of the tapered portion in the axial direction, and a radius from each gripping portion A pair of handle portions that extend outward in the direction and are connected so as to be swingable by a shaft at an intermediate position thereof,
The filling material according to any one of claims 1 to 3, wherein the grip portion disposed on the insertion portion side has a shape in which a part thereof is cut away by a notch slightly larger than an outer diameter of the insertion portion. Supplementary equipment.   The filling material compensation device according to claim 4, wherein at least the grip portion of the grip member is made of a material capable of transmitting X-rays.

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