CN219021396U

CN219021396U - Wrist osteotomy tool

Info

Publication number: CN219021396U
Application number: CN202223476439.0U
Authority: CN
Inventors: 黄欢欢; 孙延东; 孙慧明
Original assignee: Suzhou Weichuang Touched Funeng Medical Technology Co ltd
Current assignee: Suzhou Weichuang Touched Funeng Medical Technology Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-05-16
Anticipated expiration: 2032-12-26

Abstract

The utility model provides a wrist osteotomy tool, which comprises an osteotomy plate and a detector; the osteotomy plate is provided with an osteotomy datum plane and a guide groove; the detector is provided with a sliding part and a detecting part, and the sliding part is slidably arranged in the guide groove and is used for driving the detecting part to detect the center of the wrist joint; when the detection part detects the center of the wrist joint, the detector and the osteotomy plate are fixed, the osteotomy plate is fixed on the surface of the radius or the wrist bone, and osteotomy is performed according to the osteotomy datum plane. According to the utility model, the center of the wrist joint is taken as a reference, the positions of the center of the wrist joint and the feature points of the planing are measured through the extramedullary detector, and the extramedullary positioning and osteotomy of the side of the radius or the side of the wrist are respectively carried out, and as the distance between the osteotomy reference surface and the detector is unchanged, the osteotomy quantity of the side of the wrist or the side of the radius can be accurately controlled, the exposure of joint bags is reduced, the operation is simple and convenient, and the whole operation is safer and more reliable.

Description

Wrist osteotomy tool

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a wrist osteotomy tool.

Background

The facet joint replacement surgery has been increasingly accepted by the market in recent years, and has been widely used abroad, and through years of clinical verification, the surgery effect is obvious and the safety is high, but the wrist joint replacement surgery is still in a starting stage in China.

At present, the existing products mainly have two positioning modes of intramedullary and extramedullary when the wrist joint cuts bones. Intramedullary positioning osteotomies fix the osteotomies plate along the radial marrow cavity or the third palm marrow cavity direction by means of an intramedullary rod, fix the osteotomies plate by connecting a guider, and the intramedullary positioning steps are numerous and easy to damage the wrist joint marrow cavity, thereby increasing the operation risk. Extramedullary positioning osteotomies are positioned with reference to wrist joint surface features, and the osteotomic plate position is usually determined by means of a positioning tool.

Disclosure of Invention

The utility model aims to provide a wrist osteotomy tool, which simplifies operation steps, saves operation time and reduces operation risks.

To achieve the above object, in a first aspect, the present utility model provides a wrist osteotomy tool, comprising an osteotomy plate and a probe;

the osteotomy plate is provided with an osteotomy datum plane and a guide groove and is used for being fixed on the surface of a radius or a carpal bone;

the detector is provided with a sliding part and a detecting part, wherein the sliding part is slidably arranged in the guide groove and is used for driving the detecting part to detect the center of the wrist joint.

In some embodiments, the osteotomy plate has a first side, a second side, a third side, and a top surface;

the first side surface is the osteotomy datum surface;

the second side surface and the third side surface are positioned on two sides of the first side surface;

the guide groove is formed in the top surface, and two ends of the guide groove extend to the second side surface and the third side surface respectively, so that the sliding part can slide out of the guide groove.

In some embodiments, a limiting groove is formed in the inner side wall of the guide groove, a limiting bump is arranged on the sliding portion corresponding to the limiting groove, and the limiting groove is matched with the limiting bump.

In some embodiments, the probe includes a fixture and a probe body;

the sliding part and the detecting part are respectively positioned at two ends of the detecting main body, the detecting main body is provided with a connecting hole, and the connecting hole penetrates through the sliding part;

the fixing piece is matched with the osteotomy plate through the connecting hole so as to fix the detector and the osteotomy plate.

In some embodiments, the fixing member is a locking bolt, the connecting hole is a threaded hole, and the locking bolt is in threaded fit with the threaded hole; one end of the fixing piece passes through the connecting hole to be abutted against the guide groove, so that the limit protruding block is abutted against the limit groove.

In some embodiments, the probe portion is located near a side of the osteotomy datum plane, and the distance between the probe portion and the osteotomy datum plane is unchanged as the probe moves along the guide slot.

In some embodiments, the osteotomy plate is provided with fixation holes for mounting fixation pins to secure the osteotomy plate to the radius or carpal surface.

In some embodiments, the osteotomy plate has a fourth side surface opposite the first side surface, the fourth side surface having a first locating hole disposed therein for externally connecting a force line rod.

In some embodiments, the bottom surface of the osteotomy plate is provided with an avoidance groove, the avoidance groove is contoured to the radius or carpus, and the avoidance groove is used for fitting with the radius or carpus.

In some embodiments, a second locating hole is provided through the osteotomy plate on the top surface, the second locating hole for attaching a locating rod to make the osteotomy datum surface perpendicular to the radius or carpal surface.

The utility model has the beneficial effects that: the center of the wrist joint is taken as a reference, the positions of the center of the wrist joint and the feature points of the planing are measured through the extramedullary detector, and the extramedullary positioning and osteotomy of the side of the radius or the side of the wrist are respectively carried out, because the distance between the osteotomy reference surface and the detector is unchanged, the osteotomy quantity of the side of the wrist or the side of the radius can be accurately controlled, the exposure of the joint capsule is reduced, the operation is simple and convenient, and the whole operation is safer and more reliable.

Drawings

FIG. 1 is a schematic view of a wrist osteotomy tool according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a detector according to an embodiment of the present utility model;

FIG. 3 is a schematic view of an embodiment of an osteotomy plate according to the present utility model;

FIG. 4 is a schematic view of another view of an embodiment osteotomy plate provided in the present utility model;

fig. 5 is a schematic view of an osteotomy plate in accordance with an embodiment of the present utility model in use with a wrist joint.

Reference numerals:

the bone cutting plate 1, the bone cutting reference surface 11, the guide groove 12, the limit groove 121, the fixing hole 13, the first positioning hole 14, the second positioning hole 15, the avoiding groove 16, the detector 2, the detecting main body 21, the sliding part 211, the limit bump 2111, the detecting part 212, the connecting hole 213 and the fixing piece 22.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. Unless otherwise defined, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. As used herein, the word "comprising" and the like means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof without precluding other elements or items. As used herein, "attached" refers to an attachment that is either direct or indirect, i.e., through an intermediate, unless specifically indicated otherwise.

In view of the problems existing in the prior art, an embodiment of the present utility model provides a wrist osteotomy tool, and referring to fig. 1, 2 and 5, fig. 1 is a schematic view of the wrist osteotomy tool according to the embodiment of the present utility model, and fig. 2 is a schematic view of the probe according to the embodiment of the present utility model. Fig. 5 is a schematic view of an osteotomy plate in accordance with an embodiment of the present utility model in use with a wrist joint. The wrist osteotomy tool comprises an osteotomy plate 1 and a probe 2. Wherein the osteotomy plate 1 has an osteotomy datum plane 11 and a guide slot 12. The osteotomy reference plane 11 is a plane provided on one side of the osteotomy plate 1, and serves as a reference plane for osteotomy. The detector 2 has a sliding portion 211 and a detecting portion 212, wherein the sliding portion 211 is slidably disposed in the guiding slot 12 and is used for driving the detecting portion 212 to detect the center of the wrist joint 3. When the sliding part 211 slides in the guide groove 12, the detection part 212 is convenient to detect, and the distance between the detection part 212 and the osteotomy datum plane 11 is unchanged, namely, the distance between the center of the wrist joint 3 detected by the detection part 212 and the osteotomy datum plane 11 is unchanged, so that the osteotomy quantity of the wrist bone side or the radius side can be accurately controlled, the overmuch osteotomy quantity is avoided, and the exposure of the joint capsule is reduced. When the detecting part 212 detects the center of the wrist joint 3, the detector 2 and the osteotomy plate 1 are fixed, and then the osteotomy plate 1 is finely adjusted until the osteotomy reference plane 11 is perpendicular to the radius or carpal surface, thereby completing the positioning of the radius side or carpal side. Finally, the osteotomy plate 1 is secured to the radius or carpal surface, and after the osteotomy plate 1 is secured, the probe 2 may be removed from the osteotomy plate 1 and osteotomies may be performed according to the osteotomy reference plane 11.

Fig. 3 is a schematic view of an embodiment of an osteotomy plate according to the present utility model, and fig. 4 is a schematic view of another embodiment of an osteotomy plate according to the present utility model.

Referring to fig. 3 and 4, in some embodiments, osteotomy plate 1 has a first side, a second side (not shown), a third side (not shown), a fourth side (not shown), a top surface (not shown), and a bottom surface (not shown). The first side face and the fourth side face are arranged oppositely, and the second side face and the third side face are respectively located on two sides of the first side face. The first side surface is set as an osteotomy reference surface 11, the guide groove 12 is provided on the top surface and parallel to the osteotomy reference surface 11 with the distance between the two surfaces kept unchanged, and both ends of the guide groove 12 extend to the second side surface and the third side surface. After the osteotomy plate 1 is fixed, the detector 2 can slide out along the two ends of the guide groove 12, so that the osteotomy plate 1 is separated from the detector 2, the subsequent osteotomy operation is convenient, and the interference of the detector 2 is avoided.

Referring to fig. 3 and 4, in some embodiments, the osteotomy plate 1 is provided with a plurality of fixation holes 13, a first positioning hole 14, and a plurality of second positioning holes 15. The fixing holes 13 and the second positioning holes 15 are symmetrically arranged on the top surface of the osteotomy plate 1 and penetrate through the osteotomy plate 1, and the first positioning holes 14 are arranged on the fourth side surface.

Referring to fig. 1 to 4, when the probe 2 detects the center of the wrist joint, the probe 2 is fixed with the osteotomy plate 1, then the osteotomy plate 1 is finely adjusted through the first positioning hole 14 and the second positioning hole 15, the osteotomy datum plane 11 is perpendicular to the surface of the radius or the carpus, the position of the osteotomy plate 1 meets the requirement of planing, and finally the osteotomy plate 1 is fixed through the fixing hole 13 by using a kirschner wire. It should be noted that, the first positioning hole 14 is used for connecting a force line pole externally, the position of the osteotomy plate 1 meets the requirement of planing by fine adjustment of the force line pole (the osteotomy datum plane 11 is perpendicular to the surface of the radius or the wrist), the second positioning hole 15 is used for installing a positioning rod, the osteotomy datum plane 11 is kept perpendicular to the surface of the radius or the wrist, namely, the positioning of the radius side or the wrist side is completed, and finally, the osteotomy plate 1 is fixed by penetrating the fixing hole 13 through the kirschner wire.

Referring to fig. 3, further, an avoidance groove 16 is provided on the bottom surface of the osteotomy plate 1, the avoidance groove 16 is a groove with an arc surface, and the avoidance groove 16 is used for fitting with the radius or the carpal bones.

With continued reference to fig. 3, in some embodiments, the shape of the relief groove 16 may be designed to mimic the shape of the surface of the radius or carpus, so that the osteotomy plate 1 better conforms to the surface of the radius or carpus, ensuring stability of the osteotomy plate 1 after it is fixedly mounted.

Referring to fig. 3 and 4, in some embodiments, the inner side wall of the bottom of the guide groove 12 is provided with a limiting groove 121, and two ends of the limiting groove 121 extend to the second side surface and the third side surface, so that the cross section of the guide groove 12 is in a 'convex' shape. The sliding portion 211 is provided with a limit protrusion 2111 corresponding to the limit groove 121, and the limit groove 121 is adapted to the limit protrusion 2111. Therefore, when the sliding part 211 slides along the guide groove 12, the sliding part 211 can only be separated from the two ends of the guide groove 12 due to the action of the limit lug 2111 and the sliding groove, so that the stability of the detector 2 during sliding detection is ensured.

In some embodiments, a limiting groove 121 may be disposed on any inner side wall in the guiding groove 12, so that the cross section of the guiding groove 12 is in an "L" shape, and a limiting protrusion 2111 may be disposed on one side of the sliding portion 211 corresponding to the limiting groove 121.

Referring to fig. 1 and 2, in some embodiments, the probe 2 includes a fixing member 22 and a probe body 21, and the fixing member 22 and the probe body 21 are detachably connected. The sliding part 211 and the detecting part 212 are respectively positioned at two ends of the detecting main body 21, the detecting main body 21 is provided with a connecting hole 213, the connecting hole 213 penetrates through the sliding part 211, and the fixing piece 22 is detachably connected with the connecting hole 213. The fixation member 22 may be mated with the osteotomy plate 1 via the attachment hole 213 to secure the probe 2 and osteotomy plate 1.

Referring to fig. 2 and 3, in the present embodiment, the fixing member 22 is a locking bolt, the connecting hole 213 is a threaded hole, the locking bolt is in threaded engagement with the threaded hole, one end of the fixing member 22 passes through the connecting hole 213 and abuts against the bottom of the guide groove 12 by rotating the fixing member 22, so that the limit bump 2111 abuts against the limit groove 121, the fixed connection between the probe 2 and the osteotomy plate 1 is achieved, and the detachment of the probe 2 and the osteotomy plate 1 is also convenient.

Referring to fig. 1, in some embodiments, the detecting portion 212 is located near a side of the osteotomy reference plane 11, and the guide groove 12 is disposed parallel to the osteotomy reference plane 11, so that the distance between the detecting portion 212 and the osteotomy reference plane 11 is unchanged when the detector 2 moves along the guide groove 12. The probe 2 detects the center of the wrist joint as a reference point, and since the distance between the probe 212 and the osteotomy reference plane 11 is constant (the osteotomy amount is constant), the osteotomy amount on the wrist side or the radius side is precisely controlled based on the detected center of the wrist joint.

Referring to fig. 1 to 4, in the present embodiment, the center of the wrist joint is used as a measurement reference, and the osteotomy amount is measured by the extramedullary probe 2, so that the positioning osteotomy on the radius side or the carpal side is performed. The method has the advantages of being capable of respectively and accurately controlling the osteotomy quantity of the carpal side and the radius side, reducing the exposure of joint capsules, being simple and convenient to operate, reducing intramedullary positioning steps and damage to the marrow cavity of the wrist joint, reducing operation risks and enabling the whole operation to be safer and more reliable.

The foregoing is merely a specific implementation of the embodiments of the present application, but the protection scope of the embodiments of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the embodiments of the present application should be covered by the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims

1. A wrist osteotomy tool, comprising an osteotomy plate and a probe;

2. The wrist osteotomy tool of claim 1, wherein the osteotomy plate has a first side, a second side, a third side, and a top surface;

the first side surface is the osteotomy datum surface;

3. The wrist osteotomy tool of claim 1 or 2, wherein the inner side wall of the guide slot is provided with a limit slot, the sliding portion is provided with a limit bump corresponding to the limit slot, and the limit slot is adapted to the limit bump.

4. The wrist osteotomy tool of claim 3, wherein the probe comprises a fixture and a probe body;

5. The wrist osteotomy tool of claim 4, wherein the securing member is a locking bolt, the attachment hole is a threaded hole, and the locking bolt is threadedly engaged with the threaded hole; one end of the fixing piece passes through the connecting hole to be abutted against the guide groove, so that the limit protruding block is abutted against the limit groove.

6. The wrist osteotomy tool of claim 1, wherein the probe is positioned adjacent a side of the osteotomy datum surface, and wherein the probe is positioned at a constant distance from the osteotomy datum surface as the probe moves along the guide slot.

7. The wrist osteotomy tool of claim 1, wherein the osteotomy plate is provided with a fixation hole for receiving a fixation needle to secure the osteotomy plate to the radius or carpal surface.

8. The wrist osteotomy tool of claim 2, wherein the osteotomy plate has a fourth side surface, the fourth side surface being opposite the first side surface, the fourth side surface having a first positioning hole disposed therein, the first positioning hole for an external force line rod.

9. The wrist osteotomy tool of claim 2, wherein the bottom surface of the osteotomy plate is provided with a relief groove that contours to the radius or carpus for attachment to the radius or carpus.

10. The wrist osteotomy tool of claim 2, wherein the top surface is provided with a second locating hole therethrough for attachment of a locating rod to enable the osteotomy datum surface to be perpendicular to the radius or carpal surface.