TWI839314B - Guiding positioning component of osteotomy guiding fixture and osteotomy guiding fixture containing the same - Google Patents

Abstract

A guiding and positioning component of an osteotomy guiding jig is suitable for guiding and positioning a cutting guide block of an osteotomy guiding jig. The guiding and positioning component includes: a fixed head and a guiding and positioning part. The fixed head has a through hole. The guiding and positioning part includes two guiding members and a positioning end. The two guiding members are clamped together to form a guiding track. The two ends of the two guiding members are respectively connected to the fixed head and the positioning end. The positioning end is located at the end of the guiding track to close the guiding track. The present invention also provides an osteotomy guiding jig, which includes a cutting guide block and the aforementioned guiding and positioning component. The guiding and positioning component and the osteotomy guiding jig of the present invention can assist the surgeon to directly position the incision to a predetermined angle without the need to measure the incision angle through additional instruments, thereby simplifying the surgical process and improving the surgical accuracy.

Description

Guiding positioning component of osteotomy guiding fixture and osteotomy guiding fixture containing the same

The present invention relates to an osteotomy auxiliary instrument, and more particularly to a guiding and positioning component of an osteotomy guiding fixture and an osteotomy guiding fixture comprising the same.

For patients with tibia curvature, the medical community has developed a treatment called high tibial osteotomy (HTO). The surgical procedure is to first make a notch at a specific location of the patient's tibia (usually near the top of the inner side of the knee), and then expand the incision to a specific angle according to the degree of tibia curvature of the individual patient. Then, bone cement is injected into the expanded incision as support, and bone plates and bone nails are applied to the outside of the tibia for fixation.

There are some osteotomy guides on the market that allow surgeons to cut along a predetermined cutting surface; however, how to accurately open the incision to a predetermined angle and fix it still depends heavily on the surgeon's judgment and surgical experience. For less experienced surgeons, the angle of the incision may be inaccurate, which in turn affects the surgical outcome.

Therefore, in order to solve various problems of the conventional osteotomy guiding fixture, the present invention proposes a guiding and positioning component of the osteotomy guiding fixture.

To achieve the above-mentioned and other purposes, the present invention proposes a guiding and positioning component of an osteotomy guiding fixture, which is suitable for guiding and positioning a cutting guide block of an osteotomy guiding fixture. The guiding and positioning component includes: a fixed head having a through hole; and a guiding and positioning portion, including two guiding members and a positioning end, the two guiding members are clamped to form a guiding track, the two ends of the two guiding members are respectively connected to the fixed head and the positioning end, and the positioning end is located at the end of the guiding track to close the guiding track.

In one embodiment of the present invention, the fixed head is columnar, and the axis of the fixed head is perpendicular to the extension direction of the guide rail.

In one embodiment of the present invention, the outer surface of the fixed head is provided with geometric features for matching the corresponding features of the cutting guide block.

In one embodiment of the present invention, the two guide members are arranged parallel to each other.

In one embodiment of the present invention, the guide rail is a straight line.

In one embodiment of the present invention, the two guide members are in the shape of round bars.

In one embodiment of the present invention, the positioning end is semi-annular.

The present invention further proposes an osteotomy guide fixture, which includes: a cutting guide block, including a first main body and a second main body, the first main body and the second main body are clamped to form at least one cutting guide track, the first main body has a first fixing hole, and the second main body has a second fixing hole; and a guiding positioning component as described above, the through hole is connected to the first fixing hole, and the second fixing hole is located in the guiding track.

Thus, the guiding and positioning component of the osteotomy guiding fixture of the present invention and the osteotomy guiding fixture including the same can assist the surgeon to directly position the incision to a predetermined angle without excessively opening the incision to insert other supporting devices or measuring the incision angle through additional instruments, thereby simplifying the surgical process and improving surgical accuracy.

In order to fully understand the present invention, the present invention is described in detail through the following specific embodiments and the attached drawings. Technical personnel in this field can understand the purpose, features and effects of the present invention from the contents disclosed in this specification. It should be noted that the present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. The following implementation method will further explain the relevant technical content of the present invention in detail, but the disclosed content is not used to limit the scope of the patent application of the present invention. The description is as follows:

As shown in FIG. 1 to FIG. 4 , the osteotomy guide fixture 200 of the embodiment of the present invention at least comprises: a cutting guide block 1 and a guiding positioning component 100 .

As shown in FIG. 2 , the guiding and positioning component 100 includes: a fixing head portion 2 and a guiding and positioning portion 3 .

The fixed head 2 has a through hole 21. The shape of the fixed head 2 is not limited, and can be cylindrical or any geometric shape. The through hole 21 penetrates the body of the fixed head 2.

The guiding and positioning part 3 includes two guiding members 31 and a positioning end 32. The two guiding members 31 are clamped together to form a guiding track T. The two ends of the two guiding members 31 are respectively connected to the fixed head 2 and the positioning end 32. The positioning end 32 is located at the end of the guiding track T to close the guiding track T. Among them, the two guiding members 31 are physical objects with limiting capabilities, and the guiding track T is a space that allows objects to penetrate.

Next, it is explained how the guiding and positioning component 100 guides and positions the cutting guide block 1.

As shown in FIG3 , the cutting guide block 1 includes a first body 11 and a second body 12. The curvature of the surface of the first body 11 and the second body 12 facing the tibia can be designed to match the curved surface of the bone to be operated on. The first body 11 and the second body 12 are combined to form at least one cutting guide G1, that is, the scalpel can cut the bone along the cutting guide G1. In this embodiment, the first body 11 and the second body 12 are also combined to form a cutting guide G2 for the surgeon to cut from another angle. The cutting guide G1 and the cutting guide G2 are at an angle, but the present invention is not limited to this, and the cutting guide G2 is not necessary.

After cutting, the surgeon will use the bone needle to penetrate the fixing holes on the surface of the first body 11 and the second body 12 and pierce the bone surface. The first body 11 and the second body 12 may be provided with a plurality of fixing holes, wherein one of the fixing holes of the first body 11 is the first fixing hole 111, and one of the fixing holes of the second body 12 is the second fixing hole 121. The following will illustrate how the first fixing hole 111 and the second fixing hole 121 are matched with the cutting guide block 1 to guide and position the cutting guide block 1 with reference to FIG. 4.

As shown in FIG4 , the through hole 21 of the fixing head 2 is passed through the first bone needle N1 and connected to the first fixing hole 111. The first bone needle N1 has previously passed through the first fixing hole 111 and pierced into the bone surface. At the same time, the guide track T is passed through the second bone needle N2 so that the second fixing hole 121 is located in the guide track T. The second bone needle N2 has previously passed through the second fixing hole 121 and pierced into the bone surface.

Then, force is applied to separate the cut tibia along the extension direction of the guide track T (force can be applied to any bone needle, the first main body 11, the second main body 12, the bone itself or any object that can separate the bones). When the second bone needle N2 and/or the second fixing hole 121 move to the positioning end 32 along the extension direction of the guide track T (as shown in the direction of the arrow in FIG. 4 ) and cannot move further, it means that the incision is stretched to the angle predetermined for the operation, and the positioning of the second main body 12 relative to the first main body 11 is completed. At this time, the position of the second main body 12 and the first main body 11 and the incision angle can be fixed, and subsequent surgical operations can be performed, such as adding fillings, inserting bone plates or nailing bone nails.

The length of the two guide members 31 and the position of the positioning end 32 (i.e., the length of the guide track T) are predetermined before the operation, can be customized according to the patient's condition, and can be manufactured using 3D printing technology.

In summary, the guiding and positioning member 100 and the osteotomy guiding fixture 200 comprising the same of the present invention can assist the surgeon to directly position the incision to a predetermined angle without excessively opening the incision to insert other supporting devices or measuring the incision angle through additional instruments, thereby simplifying the surgical process and improving surgical accuracy.

Furthermore, in this embodiment, as shown in Fig. 2, the fixed head 2 is columnar, and the axis of the fixed head 2 is perpendicular to the extension direction of the guide rail T. The fixed head 2 of this embodiment is cylindrical, but the present invention is not limited thereto, and the fixed head 2 can be other shapes.

Furthermore, in this embodiment, as shown in FIG2 and FIG3, the outer surface of the fixing head 2 is provided with a geometric feature 22 for matching the corresponding feature 112 on the first body 11 of the cutting guide block 1. The geometric feature 22 is, for example, in the shape of a concave block or a convex block, so that the surgeon can match the fixing head 2 with the first body 11 in a specific direction, thereby determining the extension direction of the guide track T.

Furthermore, in this embodiment, the two guide members 31 are arranged parallel to each other. However, the present invention is not limited thereto, and in other embodiments, the two guide members 31 are non-parallel, for example, the two guide members 31 are tapered from the fixed head 2 toward the positioning end 32.

Further, in the present embodiment, the guide track T is a straight line. However, the present invention is not limited thereto, and the guide track T can be a curve or other irregular line to allow the cut tibia to be twisted in a specific manner.

Furthermore, in this embodiment, the two guide members 31 are in the shape of round bars to reduce the contact area with the object moving in the guide rail T, but the present invention is not limited thereto, and the two guide members 31 can be bars of other shapes.

Furthermore, in this embodiment, the positioning end 32 is semi-circular to match the shape of the bone pin or the second fixing hole 121. However, the present invention is not limited thereto, and the positioning end 32 may be in other shapes.

The present invention has been disclosed in the above by way of an embodiment, but those skilled in the art should understand that the embodiment is only used to describe the present invention and should not be interpreted as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to the embodiment should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to that defined by the scope of the patent application.

100: Guiding and positioning member 1: Cutting guide block 11: First body 111: First fixing hole 112: Corresponding feature 12: Second body 121: Second fixing hole 2: Fixing head 200: Osteotomy guide fixture 21: Through hole 22: Geometric feature 3: Guiding and positioning part 31: Guide piece 32: Positioning end G1: Cutting guide channel G2: Cutting guide channel N1: First bone needle N2: Second bone needle T: Guide track

FIG. 1 is a three-dimensional schematic diagram of an osteotomy guide jig according to an embodiment of the present invention. FIG. 2 is a three-dimensional schematic diagram of a guide positioning component according to an embodiment of the present invention. FIG. 3 is a three-dimensional schematic diagram of a cutting guide block according to an embodiment of the present invention. FIG. 4 is a schematic diagram of the use state of the osteotomy guide jig according to an embodiment of the present invention.

11: The first subject

12: Second subject

121: Second fixing hole

2:Fix the head

21: Through hole

31: Guide piece

32: Positioning end

N1: First spicule

N2: Second bone needle

T:Guide track

Claims (8)

A guiding and positioning component of an osteotomy guiding fixture is suitable for guiding and positioning a cutting guide block of an osteotomy guiding fixture. The guiding and positioning component comprises: A fixed head having a through hole; and A guiding and positioning portion, comprising two guiding members and a positioning end, the two guiding members are clamped together to form a guiding track, the two ends of the two guiding members are respectively connected to the fixed head and the positioning end, and the positioning end is located at the end of the guiding track to close the guiding track. A guiding and positioning component as described in claim 1, wherein the fixed head is columnar and the axis of the fixed head is perpendicular to the extension direction of the guide rail. A guiding and positioning component as described in claim 2, wherein the outer surface of the fixed head is provided with geometric features for matching the corresponding features of the cutting guide block. A guiding and positioning member as described in claim 1, wherein the two guiding members are arranged parallel to each other. A guiding and positioning component as described in claim 1, wherein the guiding rail is a straight line. A guiding and positioning component as described in claim 1, wherein the two guiding members are in the shape of round bars. A guiding and positioning member as described in claim 1, wherein the positioning end is semi-annular. An osteotomy guide fixture, comprising: A cutting guide block, including a first main body and a second main body, the first main body and the second main body are clamped to form at least one cutting guide track, the first main body has a first fixing hole, and the second main body has a second fixing hole; and A guiding positioning member as described in any one of claim items 1 to 7, the through hole is connected to the first fixing hole, and the second fixing hole is located in the guiding track.

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