CN214342492U

CN214342492U - Osteotomy tool

Info

Publication number: CN214342492U
Application number: CN202022724846.3U
Authority: CN
Inventors: 孙延东; 黄欢欢; 付长帅
Original assignee: Suzhou Microport Orthorecon Co Ltd
Current assignee: Suzhou Microport Orthorecon Co Ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-10-08
Anticipated expiration: 2030-11-23

Abstract

The utility model provides a cut bone frock, it includes: the bone cutting device comprises a base, a bone cutting assembly and an adjusting knob; the adjusting knob is rotatably connected with the base around an axis; the osteotomy assembly is movably coupled to the adjustment knob along the axis; the adjustment knob drives the osteotomy assembly to move along the axis when rotated about the axis. So configured, the distance of the osteotomy assembly relative to the base is adjustable by rotating the adjustment knob. Therefore, the purpose of adjusting the osteotomy amount is achieved, and the bone cutting device is simple in structure, convenient to operate and reliable.

Description

Osteotomy tool

Technical Field

The utility model relates to an orthopedics instrument technical field, in particular to cut bone frock.

Background

The tibial osteotomy of the unicondylar knee joint is a crucial step in knee replacement, and the whole knee tibial treatment is based on the osteotomy plane after the step of treatment. In the step of the tibial osteotomy of the unicondylar knee joint, a tibial osteotomy positioning tool is required to be utilized, and the instrument is used for extramedullary positioning and mainly used for finishing the alignment of the tibial force line of the knee joint and the setting of the posterior inclination angle. The extramedullary positioning is completed by an external bracket, and the method is the current mainstream operation. When the tibia osteotomy positioning tool is used, the tibia osteotomy positioning tool is placed on a tibia, and then the tibia osteotomy plate is adjusted to a position to be osteotomy by the fine adjustment device on the tibia osteotomy positioning tool. The tibial osteotomy positioning tool has the advantages of no damage to the tibial medullary cavity and simple operation; however, the fine adjustment mechanism of the existing tibial osteotomy positioning tool is complex, the reliability is poor, and the adjustment process is complex.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cut bone frock to solve current shin bone and cut bone positioning tool and adjust complicated, the poor problem of reliability.

In order to solve the technical problem, the utility model provides an osteotomy frock, it includes: the bone cutting device comprises a base, a bone cutting assembly and an adjusting knob; the adjusting knob is rotatably connected with the base around an axis; the osteotomy assembly is movably coupled to the adjustment knob along the axis; the adjustment knob drives the osteotomy assembly to move along the axis when rotated about the axis.

Optionally, the osteotomy assembly includes an osteotomy plate and a guide rod connected to the osteotomy plate, the base has a guide hole opened along the axis, an inner contour shape of the guide hole is matched with an outer contour shape of the guide rod, and the guide rod is movably inserted into the guide hole; the guide rod is in threaded connection with the adjusting knob, and the adjusting knob drives the guide rod to move along the guide hole through threads when rotating.

Optionally, the guide hole limits radial displacement and circumferential rotation of the guide rod.

Optionally, the guide hole has a first limiting surface arranged along the radial direction, the guide rod has a second limiting surface arranged along the radial direction, and the guide hole limits the radial displacement and the circumferential rotation of the guide rod through the abutting of the first limiting surface and the second limiting surface.

Optionally, the guide rod has an external thread, the adjusting knob has an internal thread adapted to the external thread, and the guide rod and the adjusting knob are connected through the external thread and the internal thread.

Optionally, the external thread is arranged at one end of the guide rod far away from the osteotomy plate.

Optionally, the osteotomy plate has a guide slot therethrough in a direction perpendicular to the axis.

Optionally, the base has a third limiting surface disposed along the axis, and the third limiting surface is configured to limit displacement of the adjusting knob along the axis.

Optionally, one of the osteotomy component and the base comprises a limiting convex tooth, the other comprises a limiting groove, the limiting convex tooth is matched with the limiting groove in shape, and the limiting convex tooth is used for being clamped into the limiting groove so as to limit circumferential rotation of the osteotomy component relative to the base.

Optionally, the adjusting knob has an anti-slip groove on its outer circumference.

To sum up, the utility model provides an osteotomy frock includes: the bone cutting device comprises a base, a bone cutting assembly and an adjusting knob; the adjusting knob is rotatably connected with the base around an axis; the osteotomy assembly is movably coupled to the adjustment knob along the axis; the adjustment knob drives the osteotomy assembly to move along the axis when rotated about the axis. So configured, the distance of the osteotomy assembly relative to the base is adjustable by rotating the adjustment knob. Therefore, the purpose of adjusting the osteotomy amount is achieved, and the bone cutting device is simple in structure, convenient to operate and good in reliability.

Drawings

Those skilled in the art will appreciate that the drawings are provided for a better understanding of the invention and do not constitute any limitation on the scope of the invention. Wherein:

fig. 1 is a schematic view of an osteotomy tool according to an embodiment of the present invention;

FIG. 2 is a schematic view of an osteotomy assembly of an embodiment of the present invention;

FIG. 3 is a schematic view of an osteotomy assembly having a spacing lobe according to one embodiment of the present invention;

fig. 4 is a schematic view of a base according to an embodiment of the present invention;

fig. 5 is a schematic view of an adjusting knob according to an embodiment of the present invention;

FIG. 6 is a schematic view of a longitudinal cross-section of an osteotomy assembly of an embodiment of the present invention;

FIG. 7 is a schematic illustration of a longitudinal cross-section of an osteotomy assembly of a preferred example of an embodiment of the present invention;

FIG. 8 is a schematic view in longitudinal section of an osteotomy assembly of another preferred example of an embodiment of the present invention;

fig. 9 is a schematic view of a state of use of an osteotomy assembly according to an embodiment of the present invention.

In the drawings:

1-an osteotomy component; 1 a-a guide groove; 1 b-a guide bar; 1 c-external threads; 1 d-limit convex teeth; 1 e-osteotomy plate; 2-a base; 2 a-nail holes; 2 b-a pilot hole; 2 c-a limiting window; 2 d-a connection mechanism; 2 e-a third limiting surface; 2 f-a limiting groove; 3-adjusting knob; 3 c-a screw hole; 4-ankle holding mechanism; 5-bone cutting; 6-axis.

Detailed Description

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in simplified form and are not to scale, but rather are provided for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this application, the singular forms "a", "an" and "the" include plural referents, the term "or" is generally employed in a sense including "and/or," the terms "a", "an" and "the" are generally employed in a sense including "at least one", the terms "at least two" and "two or more" are generally employed in a sense including "two or more", and moreover, the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or imply that there is a number of technical features being indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or at least two of that feature, with "one end" and "the other end" typically referring to the corresponding two parts, including not only the endpoints, unless the content clearly dictates otherwise.

The utility model discloses a core thought lies in providing a cut bone frock to solve current shin bone and cut bone positioning tool and adjust complicated, the poor problem of reliability.

The following description refers to the accompanying drawings.

Please refer to fig. 1 to 9, wherein fig. 1 is a schematic view of an osteotomy tool according to an embodiment of the present invention; FIG. 2 is a schematic view of an osteotomy assembly of an embodiment of the present invention; FIG. 3 is a schematic view of an osteotomy assembly having a spacing lobe according to one embodiment of the present invention; fig. 4 is a schematic view of a base according to an embodiment of the present invention; fig. 5 is a schematic view of an adjusting knob according to an embodiment of the present invention; FIG. 6 is a schematic view of a longitudinal cross-section of an osteotomy assembly of an embodiment of the present invention; FIG. 7 is a schematic illustration of a longitudinal cross-section of an osteotomy assembly of a preferred example of an embodiment of the present invention; FIG. 8 is a schematic view in longitudinal section of an osteotomy assembly of another preferred example of an embodiment of the present invention; fig. 9 is a schematic view of a state of use of an osteotomy assembly according to an embodiment of the present invention.

As shown in fig. 1, an embodiment of the present invention provides an osteotomy tool, which includes: the bone cutting device comprises a base 2, an osteotomy component 1 and an adjusting knob 3; the adjusting knob 3 is rotatably connected with the base 2 around an axis 6; the osteotomy assembly 1 is movably connected to the adjustment knob 3 along the axis 6; the adjustment knob 3 drives the osteotomy assembly 1 to move along the axis 6 when rotated about the axis 6. So configured, the distance of the osteotomy assembly 1 relative to the base 2 can be adjusted by turning the adjustment knob 3. Therefore, the purpose of adjusting the osteotomy amount is achieved, and the bone cutting device is simple in structure, convenient to operate and good in reliability.

Referring to fig. 2, 4 to 6, preferably, the osteotomy assembly 1 includes an osteotomy plate 1e and a guiding rod 1b connected to the osteotomy plate 1e, the base 2 has a guiding hole 2b opened along the axis 6, an inner contour of the guiding hole 2b is adapted to an outer contour of the guiding rod 1b, and the guiding rod 1b is movably inserted into the guiding hole 2 b; the guide rod 1b is in threaded connection with the adjusting knob 3, and the adjusting knob 3 drives the guide rod 1b to move along the guide hole 2b through threads when rotating.

Alternatively, the osteotomy plate 1e has a guide slot 1a extending therethrough in a direction perpendicular to said axis 6, and in actual use, an external osteotomy tool may perform an osteotomy along the guide slot 1 a. Fig. 9 shows the use state of the osteotomy tool provided in this embodiment, the osteotomy tool is connected to the ankle holding mechanism 4, the osteotomy plate 1e is attached to the bone surface of the osteotomy 5 (such as a tibia) along the direction perpendicular to the axis 6, and the position of the osteotomy plate 1e can be finely adjusted by rotating the adjusting knob 3, so as to achieve fine adjustment of the osteotomy thickness.

In an alternative embodiment, as shown in fig. 2, the osteotomy plate 1e of the osteotomy assembly 1 is a substantially rectangular plate-like member, and the guide rod 1b is disposed on one side of the osteotomy plate 1e perpendicularly to the osteotomy plate 1e, the end of the guide rod 1b remote from the osteotomy plate 1e having an external thread 1 c. As shown in fig. 4, the inner contour of the guide hole 2b of the base 2 is adapted to the outer contour of the guide rod 1b, and the guide rod 1b is inserted into the guide hole 2b and is movable in the axial direction of the guide rod 1b itself. As shown in fig. 5, the adjusting knob 3 is substantially cylindrical and has a threaded hole 3c extending therethrough in the axial direction, the threaded hole 3c has an internal thread adapted to the external thread 1c, and the guide rod 1b and the adjusting knob 3 are connected to the internal thread through the external thread 1 c. Optionally, the adjusting knob 3 has an anti-slip groove on its outer circumference to facilitate gripping by an operator. The assembled state is shown in fig. 1 and 6. With such a configuration, the rotation of the adjusting knob 3 can be converted into the axial movement of the guide rod 1b through the screw threads, so as to drive the osteotomy plate 1e to realize fine adjustment. The present invention is not limited to the shape of the osteotomy plate 1e, and in other embodiments, the osteotomy plate 1e may have an outer contour with an arc shape, which may better fit the osteotomy 5.

In other embodiments, the external thread is not limited to be provided at the end of the guide rod 1b far from the osteotomy plate 1e, and the external thread 1c may be provided at the middle of the guide rod 1b or at the end near the osteotomy plate 1e, depending on the shape of the base 2 and the position of the guide hole 2 b. Further, the internal thread is not limited to be provided on the adjustment knob 3, the external thread 1c is not limited to be provided on the guide bar 1b, and the adjustment knob 3 may have the external thread 1c and the guide bar 1b may have the internal thread, and those skilled in the art can reasonably arrange the threads of the adjustment knob 3 and the guide bar 1b according to the above-mentioned idea.

Preferably, the guide hole 2b restricts radial displacement and circumferential rotation of the guide rod 1 b. The radial displacement and circumferential rotation referred to herein are radial displacement and circumferential rotation with respect to the rotation axis (axis 6 in the present embodiment) of the guide bar 1 b. Further, the guide hole 2b has a first limiting surface arranged along the radial direction, the guide rod 1b has a second limiting surface arranged along the radial direction, and the guide hole 2b limits the radial displacement and the circumferential rotation of the guide rod 1b through the abutting of the first limiting surface and the second limiting surface. In the example shown in fig. 2 to 4, the cross section of the guide hole 2b and the guide rod 1b not provided with the external thread is kidney-shaped, so that the guide rod 1b and the guide hole 2b respectively have two side walls arranged in the radial direction, and the two side walls of the guide rod 1b are configured as first limiting surfaces; both side walls of the guide hole 2b are configured as second stopper surfaces. After the guide rod 1b is inserted into the guide hole 2b, the first limiting surface abuts against the second limiting surface, and the relative rotation of the guide rod 1b and the guide hole 2b can be limited. The guide hole 2b also limits the radial displacement of the guide rod 1b, since the guide hole 2b is adapted to the profile shape of the guide rod 1 b. Of course, the above-mentioned waist-shaped cross section is only an example of the guide hole 2b and the guide rod 1b, but not limited thereto, and those skilled in the art can select other cross section shapes, such as rectangle or hexagon, for the guide hole 2b and the guide rod 1b according to the actual situation.

Further, the base 2 has a third limiting surface 2e oppositely arranged along the axis 6, and the third limiting surface 2e is used for limiting the displacement of the adjusting knob along the axis 6. Fig. 4 and 6 show a first preferred example of the base 2, wherein the base 2 has a limiting window 2c arranged through in a direction perpendicular to the axis 6, the limiting window 2c is a rectangular hole, and two opposite side walls of the limiting window 2c in the direction of the axis 6 are configured as third limiting surfaces 2 e. Preferably, the distance between the third limiting surfaces 2e is slightly larger than the length of the adjusting knob 3 along the axis 6, and the width of the limiting window 2c is larger than the maximum radial outer dimension of the adjusting knob 3. Thereby, the adjusting knob 3 can move in the limit window 2 c. Furthermore, the guide rod 1b penetrates the limit window 2c along the axis 6 and is in threaded connection with the adjusting knob 3. With this arrangement, the radial degree of freedom of the adjustment knob 3 is restricted by the guide rod 1b, the axial degree of freedom of the adjustment knob 3 is restricted by the third stopper surface 2e, and the circumferential rotation of the adjustment knob 3, that is, the axial movement of the guide rod 1b is converted by the screw. Alternatively, the guide bar 1b may penetrate the entire limit window 2c, or may not penetrate the limit window 2 c.

Fig. 7 shows a second preferred example of the base 2, the limiting window 2c comprising a first zone and a second zone, wherein the width of the first zone in the direction perpendicular to the axis 6 is greater than the width of the second zone in the direction perpendicular to the axis 6, the longitudinal section of the entire limiting window 2c being substantially T-shaped. The two side walls of the first region opposed in the direction of the axis 6 are configured as third stopper surfaces 2 e. Correspondingly, the longitudinal section of the adjusting knob 3 is also approximately T-shaped, and the shape of at least one part of the adjusting knob 3 is matched with that of the first area, so that the axial freedom degree of the adjusting knob 3 can be limited by the two third limiting surfaces 2e of the first area. Fig. 7 shows a preferred example in which the limiting window 2c is located at the end of the base 2 remote from the osteotomy plate 1e and the second zone is open in a direction away from the osteotomy plate 1 e. Fig. 8 shows a third preferred example of a base 2 which is substantially identical to the second preferred example shown in fig. 7, except that a limiting window 2c is located at the end of the base 2 close to the osteotomy plate 1e, and the second zone is open in the direction of the osteotomy plate 1 e. Likewise, two side walls of which the first region is opposed in the direction of the axis 6 are configured as the third stopper surfaces 2 e.

It should be understood that the above three preferred examples are only examples of the position limiting window 2c and not limitations on the position of the position limiting window 2c, and those skilled in the art can make other arrangements on the position of the position limiting window 2c on the base 2 according to the actual situation.

Preferably, one of the osteotomy component 1 and the base 2 comprises a limiting convex tooth 1d, the other comprises a limiting groove 2f, the limiting convex tooth 1d is matched with the limiting groove 2f in shape, and the limiting convex tooth 1d is used for being clamped into the limiting groove 2f to limit circumferential rotation of the osteotomy component 1 relative to the base 2. In the example shown in fig. 3 and 6, the osteotomy assembly 1 comprises a stop tooth 1d and the base 2 comprises a stop groove 2 f. Alternatively, the limit tooth 1d is provided on the osteotomy plate 1e on the same side of the osteotomy plate 1e as the guide bar 1 b. The limiting groove 2f is opened at one end of the base 2 facing the osteotomy plate 1e and is opened towards the osteotomy plate 1 e. The position of the limiting convex tooth 1d is matched with the position of the limiting groove 2f, and after the guide rod 1b is inserted into the guide hole 2b, the limiting convex tooth 1d is correspondingly inserted into the limiting groove 2f, so that the auxiliary anti-rotation effect is achieved, and the circumferential rotation of the osteotomy component 1 relative to the base 2 is further limited. Of course, in other embodiments, the retaining tooth 1d may be disposed on the base 2 and the retaining groove 2f may be disposed on the osteotomy assembly 1 with the same effect.

Optionally, referring to figures 1, 4 and 7, the base 2 also has a nail hole 2a arranged through it in a direction perpendicular to the axis 6, in use, for the insertion of an external fixation needle for fixing the base 2 to the bone 5 to be osteotomy. Optionally, the base 2 further has a connecting mechanism 2d arranged in a direction perpendicular to the axis 6, the connecting mechanism 2d being adapted to be connected to the ankle mechanism 4.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims

1. The utility model provides an osteotomy frock which characterized in that includes: the bone cutting device comprises a base, a bone cutting assembly and an adjusting knob; the adjusting knob is rotatably connected with the base around an axis; the osteotomy assembly is movably coupled to the adjustment knob along the axis; the adjustment knob drives the osteotomy assembly to move along the axis when rotated about the axis.

2. The osteotomy tool of claim 1, wherein the osteotomy assembly comprises an osteotomy plate and a guide rod connected to the osteotomy plate, the base having a guide hole formed along the axis, the guide hole having an inner contour shape adapted to an outer contour shape of the guide rod, the guide rod movably disposed through the guide hole; the guide rod is in threaded connection with the adjusting knob, and the adjusting knob drives the guide rod to move along the guide hole through threads when rotating.

3. The osteotomy tool of claim 2, wherein the guide bore limits radial displacement and circumferential rotation of the guide rod.

4. The osteotomy tool of claim 3, wherein the guide hole has a first radially disposed stop surface, the guide rod has a second radially disposed stop surface, and the guide hole limits radial displacement and circumferential rotation of the guide rod by abutment of the first stop surface and the second stop surface.

5. The osteotomy tool of claim 2, wherein the guide rod has an external thread, the adjustment knob has an internal thread adapted to the external thread, and the guide rod and the adjustment knob are connected to the internal thread through the external thread.

6. The osteotomy tool of claim 5, wherein said external thread is disposed at an end of said guide rod distal from said osteotomy plate.

7. The osteotomy tool of claim 2, wherein said osteotomy plate has a guide slot therethrough in a direction perpendicular to said axis.

8. The osteotomy tool of claim 1, wherein the base has a third stop surface disposed opposite along the axis for limiting displacement of the adjustment knob along the axis.

9. The osteotomy tool of claim 1, wherein one of the osteotomy assembly and the base comprises a limiting protrusion and the other comprises a limiting groove, the limiting protrusion is matched with the limiting groove in shape, and the limiting protrusion is used for being clamped into the limiting groove to limit circumferential rotation of the osteotomy assembly relative to the base.

10. The osteotomy tool of claim 1, wherein a periphery of said adjustment knob has a non-slip groove.