CN104000642B - The auxiliary universal osteotomy module of total knee replacement tibia of navigation - Google Patents

Abstract

The invention discloses a tibial universal osteotomy module for navigation-assisted total knee replacement, which comprises a tibial fixation block (1), a tibial osteotomy module (2) and a connecting rod (3). A spherical body (6) is fixed at the upper end, and the spherical body (6) is passed through the connection hole (13). The curved surface of the upper end of the spherical body (6) abuts against the fixed block (8), and the lock The tightening screw block (9) is screwed and fixed with the tibial osteotomy module (2); the lower end of the connecting rod (3) is connected with a slider (5), and the slider (5) is slidingly fitted with the tibial fixation block (1) . In the present invention, the tibial fixation block and the tibial osteotomy module are connected by a connecting rod. One end of the connecting rod is provided with a slider, and the other end is connected with a spherical body. The spherical body can rotate universally in the tibial positioning block and is combined with the Sliding, so that the correct position of the fixed tibial osteotomy module can be better adjusted with the aid of navigation, the operation is simple and convenient, and the accuracy rate is high.

Description

Universal tibial osteotomy module for navigation-assisted total knee replacement

technical field

The invention relates to the field of medical devices, in particular to a tibial universal osteotomy module for navigation-assisted total knee replacement.

Background technique

Navigation-assisted total knee arthroplasty has the advantages of precision and extramedullary positioning. It has been invented for many years, but the scope of clinical application is narrow and the popularity rate is low. The important reason is that there are no supporting tools. If you use ordinary total knee arthroplasty Tool needs to pinch its osteotomy module by hand. At this time, the osteotomy module is difficult to stabilize on the tibia or femur, and it is easy to shake. It needs constant adjustment, resulting in prolonged operation time and easy relocation of the osteotomy module. How to make full use of the advantages of navigation-assisted total knee replacement surgery urgently needs a set of suitable special tools to shorten the operation time and improve the operation accuracy.

Contents of the invention

The technical problem to be solved by the present invention is to provide a universal tibial osteotomy module for navigation-assisted total knee arthroplasty, which is convenient for adjusting the resection angle and improving the surgical accuracy.

Technical scheme of the present invention is as follows:

A tibial universal osteotomy module for navigation-assisted total knee replacement, comprising a tibial fixation block, a tibial osteotomy module and a connecting rod, the tibial fixation block is a cuboid, and the upper end surface of the tibial fixation block is near the four corners. There is an upper and lower through fixing hole, the lower end surface of the tibial fixation block is a "U" shaped groove with the opening facing downward, and a slide groove is provided on the upper end surface; a spherical body is arranged on the upper end of the connecting rod, The lower end of the connecting rod is connected with a slider, and the slider is slidably matched with the chute. A threaded through hole is provided on one end surface of the long side of the tibial fixation block, and the threaded through hole is screwed with a locking a bolt, the threaded end of the locking bolt abuts against the slider;

The tibial osteotomy module is in the shape of an inverted ingot, and an upper and lower through-cut groove is provided at the front end of the tibial osteotomy module along the direction of the curved surface of the ingot shape, and at the rear end of the tibial osteotomy module along the direction of the ingot The curved surface extends horizontally backward with a first step, and in the middle of the first step extends backward with an arc-shaped second step, and in the middle of the second step is provided with an upper and lower connecting hole. The spherical body is installed in the connection hole, and a plurality of upper and lower fixed holes are also provided between the first step and the cut groove, and the fixed block and the lock are arranged in the connection hole from bottom to top. Tightening screw block, the lower end surface of the fixed block is provided with a hemispherical groove with the opening facing downward, the upper curved surface of the spherical body abuts in the hemispherical groove, the locking screw block and the connecting hole screw then fixed.

Using the above structure, fit the "U"-shaped groove on the lower end surface of the tibial fixation block to the surface of the tibia near the osteotomy position, then pass the steel nail through the fixing hole on the tibial positioning block, and drive the steel nail into the tibia so that The tibial fixation block is fixed on the tibia, and then the slider is slid to move the tibial osteotomy module above the osteotomy position and lock the locking bolts; since the spherical body on the connecting rod is in contact with the fixed block on a curved surface, ten thousand The tibial osteotomy module can use this effect to adjust the angle of the osteotomy position with the aid of navigation, and then lock the locking screw, and then use the steel nail to pass through the fixation on the tibial osteotomy module. The hole is fixed, and finally the tibial osteotomy is performed with a special oscillating saw through the slot for osteotomy. The structure is novel, the operation is convenient, and the accuracy is high.

In order to reduce the frictional resistance of the contact part, make the rotation of the tibial osteotomy module more flexible, reduce the weight of the tibial osteotomy module, simplify the process and reduce the cost, preferably, the fixed block is made of PPS material.

In order to facilitate locking the locking screw block during operation and better fix the angle of the tibial positioning block, as a preference, the middle part of the locking screw block is provided with an upper and lower through polygonal hole.

In order to facilitate replacement of the spherical body or the slider, preferably, a section of flat structure is provided in the middle of the connecting rod, and the lower end of the connecting rod is screwed and fixed to the slider.

In order to position and rotate the spherical body, preferably, the connection hole is a stepped hole with a large top and a small bottom.

Beneficial effects: the present invention connects the tibial fixation block and the tibial osteotomy module with a connecting rod. One end of the connecting rod is provided with a slider, and the other end is connected with a spherical body. The tibial osteotomy module can be rotated universally through the spherical body and combined with The sliding of the slider can better adjust and fix the correct position of the tibial osteotomy with the aid of navigation, the operation is simple and convenient, and the accuracy rate is high.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 Schematic diagram of the structure of the spherical body, the fixing block and the locking screw block.

detailed description

The present invention will be further described below in conjunction with accompanying drawing.

As shown in Figures 1 and 2, the present invention includes a tibial fixation block 1, a tibial osteotomy module 2 and a connecting rod 3, the tibial fixation block 1 is a cuboid, and the upper end surface of the tibial fixation block 1 is near the four corners. An upper and lower through fixing hole 12 is provided, the lower end surface of the tibial fixation block 1 is a "U" shaped groove with the opening facing downwards, and the upper end surface is provided with a chute 4; the upper end of the connecting rod 3 is fixed A spherical body 6 is provided, and the middle part of the connecting rod 3 is provided with a section of flat structure, and the lower end of the connecting rod 3 is screwed and fixed with the slider 5, and the slider 5 is slidably matched with the chute 4. A threaded through hole is provided on one end surface of the long side of the tibial fixation block 1, and a locking bolt 11 is screwed inside the threaded through hole, and the threaded end of the locking bolt 11 abuts against the slider 5;

The tibial osteotomy block 2 is in the shape of an inverted ingot, and a front and rear through-cut groove 10 is provided at the front end of the tibial osteotomy block 2 along the curved surface of the ingot shape. There is a first step 7 extending horizontally backward along the ingot-shaped curved surface at the end, and an arc-shaped second step 7' is also extended backward in the middle of the first step 7. In the middle of the second step 7', a There are connecting holes 13 through the upper and lower, and the connecting holes 13 are stepped holes with a large top and a small bottom. The spherical body 6 is penetrated in the connecting hole 13, and a plurality of fixing holes 12 are arranged between the first step 7 and the slot 10, and the connection hole 13 is arranged from bottom to top. A fixed block 8 and a locking screw block 9 are provided. The fixed block 8 is made of PPS material. The lower end surface of the fixed block 8 is integrally formed with a hemispherical groove with the opening facing downward. The upper end of the spherical body 6 The curved surface abuts against the hemispherical groove, and the locking screw 9 is screwed and fixed to the connection hole 13 , and the middle part of the locking screw 9 is provided with a polygonal hole through the upper and lower sides.

The using method of the present invention is as follows:

As shown in Figures 1 and 2, the "U"-shaped groove on the lower end surface of the tibial fixation block 1 is fitted to the surface of the tibia near the osteotomy position, and then the steel nail is passed through the fixing hole 12 on the tibial osteotomy module 2, Drive the steel nail into the tibia to fix the tibial fixation block 1 on the tibia, then slide the slider 5 to move the tibial osteotomy module 2 above the osteotomy position and lock the locking bolt 11; because the connecting rod 3 The spherical body 6 on the top is in contact with the fixed block 8 on a curved surface. The spherical body 6 can realize the effect of a universal rotating head in the connection hole 13. The tibial osteotomy module 2 can use this effect to make angle adjustments for the resection position under navigation. , tighten the screw block 9 to press the fixing block 8 downward to the spherical body 6, and lock and fix the spherical body 6 so that it does not rotate anymore, and then use a steel nail to pass through the fixing hole 12 on the tibial osteotomy module 2, and put the The tibial osteotomy module 2 is fixed, and finally the special oscillating saw for surgery passes through the cutting groove 10 to perform osteotomy operation on the tibial osteotomy position platform.

The parts not described in the present invention are consistent with the prior art, and will not be repeated here.

The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure made by using the description of the present invention and the contents of the accompanying drawings, directly or indirectly used in other related technical fields, is equally applicable to the present invention. within the scope of patent protection.

Claims (5)

1. the auxiliary universal osteotomy module of total knee replacement tibia of navigation, it is characterized in that: comprise tibia fixed block (1), Tibial osteotomy module (2) and connecting rod (3), described tibia fixed block (1) is cuboid, obtain upper surface described tibia fixed block (1) and be all provided with a upper and lower through fixing hole (12) near corner place, the lower surface of this tibia fixed block (1) is downward opening " U " connected in star, and its upper surface is provided with chute (4); A spheroid (6) is installed with in the upper end of described connecting rod (3), the lower end of this connecting rod (3) is connected with slide block (5), described slide block (5) and chute (4) are slidably matched, a tapped through hole is provided with in a side end face on the long limit of described tibia fixed block (1), be bolted with clamping screw (11) in described tapped through hole, the end of thread of described clamping screw (11) abuts slide block (5);

Described Tibial osteotomy module (2) is inverted ingot-shaped, be provided with on one in the curved surface direction of the front end edge ingot-shaped of described Tibial osteotomy module (2), lower through grooving (10), to extend back first step (7) along ingot-shaped curved surface level in the rear end of described Tibial osteotomy module (2), the second step (7 ') of arc-shaped is also extended with backward at the middle part of described first step (7), be provided with at the middle part of described second step (7 '), lower through connecting hole (13), described spheroid (6) is located in this connecting hole (13), also be provided with between described first step (7) and grooving (10) multiple on, lower through fixing hole (12), fixed block (8) and locking screw block (9) is provided with from the bottom up in described connecting hole (13), the lower surface of described fixed block (8) is provided with downward opening hemispherical groove, the upper end curved surface of described spheroid (6) is connected in described hemispherical groove, described locking screw block (9) and connecting hole (13) are spirally connected fixing.

2. the universal osteotomy module of total knee replacement tibia is assisted in navigation according to claim 1, it is characterized in that: described fixed block (8) is made up of PPS material.

3. the universal osteotomy module of total knee replacement tibia is assisted in navigation according to claim 1, it is characterized in that: the middle part of described locking screw block (9) is provided with upper and lower through polygonal hole.

4. the universal osteotomy module of total knee replacement tibia is assisted in navigation according to claim 1, it is characterized in that: the middle part of described connecting rod (3) is provided with one section of flat structure, lower end and the slide block (5) of this connecting rod (3) are spirally connected fixing.

5. the universal osteotomy module of total knee replacement tibia is assisted in navigation according to claim 1, it is characterized in that: described connecting hole (13) is up big and down small shoulder hole.