CN212490268U - Wedge-shaped calcaneus patch for foot osteotomy correction - Google Patents

Abstract

The utility model discloses a foot cuts orthopedic wedge calcaneus filling block of bone of using, include: the insertion end with small cross-sectional area, the mounting end with large cross-sectional area and two bone contact surfaces positioned on the opposite inclined surfaces of the calcaneus patch; the end surface of the mounting end is provided with a holding hole; the middle part of the calcaneus patch is also provided with a bone grafting hole which penetrates through the two bone contact surfaces, and the bone grafting hole is not communicated with the holding hole; the bone contact surface is provided with a plurality of saw-tooth projections. The utility model discloses a foot cuts bone orthopedic wedge calcaneum bushing, need not fix calcaneum bushing and steel sheet when fixing, serration is used for fixing calcaneum bushing to the department of cutting bone, and serration is similar to the bone that the bone department of cutting bone can be pricked into to the spine, improves the fixed stability of calcaneum bushing, and it is long when having reduced the operation, and the calcaneum bushing of integral type has reduced manufacturing cost.

Description

Wedge-shaped calcaneus patch for foot osteotomy correction

Technical Field

The utility model belongs to the technical field of the orthopedic technique of foot osteotomy and specifically relates to an orthopedic wedge calcaneus filling block of foot osteotomy.

Background

With the development of ankle surgery, orthopedic foot surgery has increased year by year. In most foot orthopedic surgeries, the foot is generally required to be cut, and local bone grafting extension is performed after the bone is cut, which mainly comprises Cotton osteotomy, Evans osteotomy, calcaneal endograft osteotomy, calcaneal exograft osteotomy, Dwyer osteotomy and the like.

At present, allogeneic bone patches can be selected in bone grafting selection or a wedge-shaped patch is taken from the iliac wing of a patient, then the patch is fixed by a steel plate, the shape of the steel plate which can be adopted is generally shown in figures 1-3, several of the steel plates are generally required to be adopted to meet the fixation of the patch, the fixation of the steel plate and the patch, the connection between the steel plates and the fixation of the steel plate and the foot bone of the patient are completed through a fixing hole a, but the steel plate is difficult to be matched with patients with special bones, and for the patients, the design can cause the fixation to be unstable due to the difference of the feet of the patients and the patients are easy to incline or fall off. Meanwhile, the steel plate has poor shaping effect, has the possibility of leaving subcutaneous dead space, and is easy to cause infection. In addition, the adoption of various types of steel plates makes the mounting and fixing process of the patch complicated, prolongs the operation time, needs to prepare steel plates of various types, and even needs to customize the steel plates of special shapes in order to match the foot bone shapes of patients, thereby increasing the manufacturing cost of the steel plates.

The existing foot osteotomy orthopedic surgery has the following problems: the allogeneic bone patch can have rejection reaction to a certain extent after being implanted, and can have the conditions of bone absorption, bone nonunion and the like and the risk of infectious diseases; the autologous bone has limited sources, cannot meet the requirement of mass bone grafting, and complications such as infection, pain and the like may occur at the bone taking part.

In order to solve the problems of rejection reaction of allogeneic bone patches and limited autologous bone sources, a company in the united states produces a multi-hollow titanium wedge-shaped cushion block, but the multi-hollow cushion block has more defects, and the cushion block needs to be additionally assisted with a bone fracture plate for fixation, so that the operation cost is increased, the operation time and the exposure range of wounds also need to be increased, and the risk of infection of patients is increased.

Therefore, in order to satisfy the stable fixation of the wedge patch and simultaneously reduce the use of accessories and the time consumed by the operation during the operation, a new structure of the wedge calcaneus patch for the foot osteotomy orthopedics is urgently needed.

SUMMERY OF THE UTILITY MODEL

To the problem that prior art exists, the utility model aims to provide a foot cuts orthopedic wedge with bone patch simplifies the installation of operation in-process patch, adopts few accessories just can accomplish the firm fixed of patch.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a wedge-shaped calcaneus patch for orthopedic foot osteotomy, comprising: the calcaneus patch comprises an insertion end with a small cross-sectional area, a mounting end with a large cross-sectional area and two bone contact surfaces positioned on opposite inclined surfaces of the calcaneus patch; the end surface of the mounting end is provided with a holding hole; the middle part of the calcaneus patch is also provided with bone grafting holes which penetrate through the two bone contact surfaces, and the bone grafting holes are not communicated with the holding holes; the bone contact surface is provided with a plurality of saw-tooth-shaped bulges.

Further, the calcaneus patch comprises a solid layer and a porous layer, the porous layer wraps the solid layer and the outer surface of the bone grafting hole, and the porous layer is a bone trabecular structure with a preset thickness.

Further, the predetermined thickness is 1.5 mm.

Further, the holding hole is a threaded hole.

Further, the axis of the holding hole is perpendicular to the axis of the bone grafting hole.

Further, the minimum distance between the two bone contact surfaces is 1.5 mm.

Furthermore, a plurality of rows of the saw-tooth-shaped bulges are regularly arranged in parallel with the insertion end boundary of the bone contact surface.

Furthermore, the calcaneus patch is made of titanium alloy.

The utility model discloses a foot cuts bone orthopedic wedge calcaneum bushing, need not fix calcaneum bushing and steel sheet when fixing, serration is used for fixing calcaneum bushing to the department of cutting bone, and serration is similar to the bone that the bone department of cutting bone can be pricked into to the spine, improves the fixed stability of calcaneum bushing, and it is long when having reduced the operation, and the calcaneum bushing of integral type has reduced manufacturing cost.

Drawings

FIG. 1 is a schematic structural diagram of a steel plate with a shape in the background art;

FIG. 2 is a schematic structural view of another prior art (X-shaped) steel plate;

FIG. 3 is a schematic structural view of another prior art steel plate with an L-shape;

FIG. 4 is a schematic structural view of a wedge-shaped calcaneus patch for orthopedic foot osteotomy in accordance with an exemplary embodiment of the present invention;

FIG. 5 is a schematic view of another configuration of FIG. 4;

FIG. 6 is a schematic cross-sectional view of FIG. 5;

FIG. 7 is a schematic diagram of the microporous structure of 5 in FIG. 6;

in the figure:

1. an insertion end; 2. an installation end; 2-1, holding and taking the hole;

3. a bone-contacting surface; 4. bone grafting holes; 5. a porous layer; 6. a physical layer; 7. saw-toothed protrusions.

Detailed Description

To clearly illustrate the design concept of the present invention, the following description is made with reference to the examples.

In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the examples of the present invention, and it is obvious that the described examples are only a part of examples of the present invention, and not all examples. Based on the middle examples of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in fig. 4-6, there is provided a wedge-shaped calcaneus patch for orthopedic foot osteotomies, comprising: the device comprises an insertion end 1 with small cross-sectional area, a mounting end 2 with large cross-sectional area and two bone contact surfaces 3 positioned on the opposite inclined surfaces of the calcaneus patch; the end face of the mounting end is provided with a holding hole 2-1; the middle part of the calcaneus patch is also provided with a bone grafting hole 4 which penetrates through the two bone contact surfaces 3, and the bone grafting hole 4 is not communicated with the holding hole 2-1; the bone-contacting surface is provided with a plurality of saw-tooth projections 7.

As shown in fig. 4-6, the holding hole 2-1 in this example is a threaded hole, and a doctor uses a special tool with external threads to conveniently hold and take the calcaneus patch to a part to be installed, and then unscrews the tool from the threaded hole after fixation is finished; in other examples of the utility model, the holding hole 2-1 can be a hole of a clamping table, a doctor can adopt a tool which can tightly hold the holding hole 2-1 to complete the holding and installation of the calcaneus supplementing block, and the tool is taken out from the holding hole 2-1 after the fixation is finished; the structure of the holding hole 2-1 may be any other structure conventionally designed by those skilled in the art as long as it can satisfy the holding of the calcaneus patch.

As shown in fig. 4-5, several rows (8 rows in this example) of serrations 7 are regularly arranged parallel to the boundary of the insertion end 1 of the bone-contacting surface 3. This arrangement facilitates the machining of the serrations 7. The two bone contact surfaces 3 can be arranged in mirror symmetry, so that the time waste caused by distinguishing different bone contact surfaces 3 by a doctor in an operation is avoided; the serrations 7 on both bone contacting surfaces may be arranged in mirror symmetry or staggered arrangement, as shown in fig. 6, i.e., the serrations 7 are staggered, so that the serrations 7 can be more stably inserted into the bone at the osteotomy.

The bone grafting holes 4 are used for placing partial bone fragments so as to enable the calcaneus bone patch and the human bone to have better bone ingrowth.

Foot cuts bone orthopedic wedge calcaneum bushing block of using in this example, need not fix calcaneum bushing block and steel sheet when fixing, utilize the protruding 7 of cockscomb structure on the bone contact surface 3 can be fixed the department of cutting bone with the calcaneum bushing block, cockscomb structure arch 7 is similar to the bone that the bone department of cutting bone can be pricked to the spine, improve the fixed stability of calcaneum bushing block, the accessory quantity that uses in the significantly reduced operation, and simultaneously, long operation time has been reduced, furthermore, the calcaneum bushing block of integral type has reduced manufacturing cost.

In order to overcome the defect that the rejection reaction of the allogeneic bone patch and the autologous bone source in the prior art are limited, the calcaneus patch in the example is printed by a metal 3D printing technology according to the shape and the size of the bone of a patient, and the customization and the accurate correction of the prosthesis are realized. And the part that combines calcaneus patch and bone cross-section and the part of fixed calcaneus patch are printed in an integrated manner, so that a better fixing effect can be achieved.

The design process of the calcaneus patch in this example: the method has the advantages that the skeleton model is rebuilt through CT data of a patient by using the Mimics software, the shape of the calcaneus patch is designed according to the skeleton shape of the patient by using the 3D modeling software (UG), and the printed calcaneus patch can be attached to the skeleton more tightly and is not easy to fall off after the design.

As shown in fig. 6, the material of the calcaneal bone patch in this example is a titanium alloy, and includes a solid layer 6 and a porous layer 5, and the porous layer 5 is wrapped around the solid layer 6 and the outer surface of the bone graft hole 4. In this example, the thickness of the porous layer 5 is 1.5mm, the solid layer 6 is to increase the strength of the calcaneus patch and prevent the calcaneus patch from breaking, as shown in fig. 7, the porous layer 5 is a bone trabecula structure, the microporous structure convenient for bone cell to grow in is a mutually communicated multidirectional microporous structure, the diameter of the pores is 800 μm, the pores are beneficial for bone cell to creep and grow in, the porous layer 5 on the surface of the heel patch after operation can be subjected to bone fusion with the physiological bone structure, the stability of initial fixation is increased, and long-term fixation is achieved after long-term bone growth.

In the example, the axis of the holding hole 2-1 is vertical to the axis of the bone grafting hole 4, so that the bone fragments can be conveniently placed in the bone grafting hole 4, and the calcaneus supplementing block can be conveniently held and taken.

In this example, the bone grafting hole has a diameter of 7mm, and the holding hole is a screw hole of M3.

In this example, the minimum distance between the two bone contact surfaces is 1.5mm, i.e., the distance between the two bone contact surfaces 3 of the insertion end 1 is 1.5mm, and in order to enable the calcaneal bone patch to be better inserted into the incision, the smaller the distance between the two bone contact surfaces 3 of the insertion end, the better, but if too small, the structural stability of the porous layer 5 cannot be ensured, so 1.5mm is preferred; the distance between the bone contact surfaces 3 of the mounting ends 2 can have 4 specifications for realizing different opening angles: 5mm, 6mm, 7mm, 8 mm.

The process of Evans lateral strut extension for the flat-feet patient using the calcaneus patch in this example is: a swinging saw is used for opening a notch in a position, 10-15mm away from the calcaneal cuboid joint, of the calcaneus, the notch is opened on the two sides by a tool, the calcaneus patch is placed, the tool is withdrawn from the notch after the placement is completed, and the fixing of the calcaneus patch can be completed by the aid of the saw-toothed protrusions 7. The balance between the inner and outer pillars is restored by extending the outer pillar, the abduction of the forefoot, the valgus deformity of the hindfoot and the height of the arch of the foot are improved, and the medial longitudinal arch is maintained to a certain extent.

It is noted that some of the structures may be selected differently than the specific examples given above. For example, the saw-tooth shaped projections may be irregularly arranged; and the like, which can be made by those skilled in the art based on their basic skills based on an understanding of the inventive concept, and are not to be taken as an example herein.

Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A wedge-shaped calcaneus patch for orthopedic foot osteotomy, comprising: the calcaneus patch comprises an insertion end with a small cross-sectional area, a mounting end with a large cross-sectional area and two bone contact surfaces positioned on opposite inclined surfaces of the calcaneus patch; the end surface of the mounting end is provided with a holding hole; the middle part of the calcaneus patch is also provided with bone grafting holes which penetrate through the two bone contact surfaces, and the bone grafting holes are not communicated with the holding holes; the bone contact surface is provided with a plurality of saw-tooth-shaped bulges.

2. The calcaneal patch as recited in claim 1, including a solid layer and a porous layer surrounding the solid layer and the outer surface of the bone graft openings, the porous layer being a trabecular structure of predetermined thickness.

3. The calcaneus patch of claim 2, wherein the predetermined thickness is 1.5 mm.

4. The calcaneus patch of claim 1, wherein the capture hole is a threaded hole.

5. The calcaneal patch as recited in claim 1, wherein the axis of the capture hole is perpendicular to the axis of the bone graft hole.

6. The calcaneal patch as recited in claim 1, wherein the minimum distance between the two bone contacting surfaces is 1.5 mm.

7. The calcaneus patch of claim 1, wherein the rows of serrations are regularly arranged parallel to the insertion end boundary of the bone contacting surface.

8. The calcaneus patch of claim 1, wherein the calcaneus patch is formed of a titanium alloy.

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