CN114587556B - Tibial osteotomy fixation support - Google Patents

Abstract

The invention discloses a fixed support for tibial osteotomy. The fixed support for tibial osteotomy proposed by the present invention can fill the gap at the tibial section. Specifically, the fixed steel plate is first fixed to the tibia, and then the second A support block is embedded in the gap at the cut-off part of the tibia, and then the second wedge-shaped block can be driven to slide by turning the first rotating rod, and then the first wedge-shaped block can be pushed up and down to push the ejector rod, and then the second support plate can be driven away from the The direction of the first support block is moved to achieve the purpose of expanding the thickness of the first support block, that is, the first support block can support a larger gap, so as to be suitable for different sizes of osteotomy gaps and better support the tibia By filling the gap in the tibial amputation, the overall strength of the tibia can be ensured, and complications such as fracture of the osteotomy hinge, loss of postoperative fixation angle, and nonunion at the amputation can be avoided.

Description

Tibial osteotomy fixation support

technical field

The invention relates to the field of orthopedic medical technology, in particular to a fixed support for tibial osteotomy.

Background technique

Knee osteoarthritis is a degenerative joint disease that starts from the wear and tear of knee cartilage. The main clinical manifestations include joint pain, deformity, stiffness, and dysfunction. Its incidence is high and its social impact is great. The natural course of knee osteoarthritis is anteromedial osteoarthritis, which can affect all compartments of the knee joint in the middle and late stages. Patients are often accompanied by varus of the lower limb force line, and the varus gradually increases with the wear and tear of the knee joint, which seriously affects the quality of life of the patient. At the end stage, artificial joint replacement has to be performed.

At present, high tibial osteotomy, or HTO surgery, is mostly used in the surgical treatment of anteromedial knee osteoarthritis in the early and middle stages to correct the alignment of the lower limbs and reduce the load on the medial compartment of the knee joint. The most widely used HTO operation at this stage is the proximal tibial open wedge osteotomy. After the surgical osteotomy, it is necessary to use a bone plate to fix the tibia, because the existence of an open osteotomy gap will lead to a decrease in the overall strength of the tibia, and there may be fractures of the osteotomy hinge, loss of postoperative fixation angle, and nonunion at the amputation, etc. Complications seriously affect the clinical efficacy of patients undergoing HTO surgery and increase the risk of surgical failure.

Contents of the invention

The main purpose of the present invention is to provide a fixed support for tibial osteotomy, aiming to solve the problem that open wedge osteotomy of the proximal tibia will lead to open osteotomy gaps in the tibia, which in turn will lead to a decrease in the overall strength of the tibia.

To achieve the above object, the technical solution proposed by the present invention is:

A fixed support for tibial osteotomy, comprising a fixed steel plate, a first support plate and a first support; the first support plate is detachably connected to the fixed steel plate; the first support includes a first support block, a second support plate, a push rod, a first wedge block, a second wedge block and a first rotating rod; the first support block is connected to the side of the first support plate away from the fixed steel plate; the The first support block is provided with an inner cavity and a first groove; the second support plate is connected with the ejector rod; the ejector rod is movable through the first support block; the second support plate is embedded Set in the first groove; the first wedge is connected to the end of the push rod away from the second support plate; the first wedge and the second wedge are both arranged on the In the inner cavity; the first rotating rod rotates through the first support block; one end of the first rotating rod located in the inner cavity is used to abut against the second wedge block, the The second wedge is in sliding contact with the first wedge.

Preferably, a threaded rod is provided on the side of the first support plate away from the first support member, and the threaded rod is perpendicular to the first support plate; the fixed steel plate is provided with a first waist hole; The threaded rod is movable through the first waist hole, and one end of the threaded rod protruding from the fixed steel plate is used for screwing a fixing nut so as to fix the first support plate to the fixed steel plate.

Preferably, the first support block is provided with a first threaded hole perpendicular to the first support plate; the fixed steel plate is provided with a second waist hole; the first support plate is provided with a first through hole; One end of the first threaded hole passes through the inner cavity; the other end of the first threaded hole passes through the first through hole; the first through hole is used to communicate with the second waist hole; A rotating rod is provided with an external thread matched with the first threaded hole; the first rotating rod is fitted through the first threaded hole; one end of the first rotating rod away from the second wedge block It passes through the first through hole and extends into the second waist hole.

Preferably, one end of the first rotating rod protruding into the first waist hole is provided with a cross groove.

Preferably, it also includes a spring; the push rod is perpendicular to the first rotating rod, and the push rod is parallel to the first support plate; the second support plate is perpendicular to the first support plate; The spring is sleeved on the push rod; one end of the spring is connected to the inner wall of the inner cavity; the other end of the spring is connected to the first wedge block; the spring is in a compressed state so that the The second support plate has a tendency to approach the first support block.

Preferably, it also includes a limit rod; the first support block includes a connection wall arranged between the first groove and the inner cavity; the connection wall defines a limit hole; the limit rod connects On the second support plate; the limiting rod is parallel to the ejector rod; the limiting rod cooperates and slides through the connecting wall.

Preferably, it also includes a slide rail; the second wedge block is provided with a slide groove; the slide rail is arranged on the inner wall of the inner cavity opposite to the connecting wall; the slide rail is parallel to the first rotation Rod; the slide rail is matched and embedded in the slide groove.

Preferably, it also includes a third support plate and a second support member; the third support plate is detachably connected to the fixed steel plate; the second support member includes a second support block, a fourth support plate, a first connecting Rod, second connecting rod, third connecting rod, fourth connecting rod, second rotating rod, first movable block and second movable block;

The second support block is arranged on the side of the third support plate away from the fixed steel plate; the second support block is provided with a second groove; the fourth support plate can be movably inserted into the second groove; the first connecting rod and the second connecting rod are hinged to the inner bottom wall of the second groove; the other end of the first connecting rod is hinged to the first movable block; the The other end of the second connecting rod is hinged to the second movable block; one end of the third connecting rod is hinged to the fourth support plate, and the other end is hinged to the first movable block; the fourth connecting rod one end of which is hinged to the fourth supporting plate, and the other end is hinged to the second movable block; the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod The central axis is located on the same plane; the second rotating rod part is provided with external threads; the first movable block is provided with a second threaded hole matching the external thread of the second rotating rod, and the first movable block It is closer to the fixed steel plate than the second movable block; one end of the second rotating rod is rotated through the second movable block, and the second rotating rod is screwed through the second threaded hole. On the first movable block; the second rotating rod is movably mounted on the second supporting block.

Preferably, one end of the second rotating rod is provided with a first block; the first block is located on the side of the second movable block away from the first movable block; the first block is used To prevent the second rotating rod from detaching from the second movable block.

Preferably, the second support block is provided with a third threaded hole perpendicular to the third support plate; the third support plate is provided with a second through hole; one end of the third threaded hole passes through the first Two grooves; the other end of the third threaded hole passes through the second through hole; the second through hole is used to communicate with the second waist hole; the second rotating rod is provided with the second through hole. The external thread matched with the three threaded holes; the second rotating rod is fitted through the third threaded hole; the end of the second rotating rod far away from the second movable block is passed through the second through hole , and extend into the second waist hole. Compared with the prior art, the present invention at least has the following beneficial effects:

The fixed support for tibial osteotomy proposed by the present invention can fill the gap that occurs at the tibial cutoff. Specifically, the fixed steel plate is first fixed to the tibia, and then the first support block is embedded in the gap that appears at the tibial cutoff. Rotate the first rotating rod to drive the second wedge block to slide, and then push the first wedge block up and down to push the push rod, and then drive the second support plate to move away from the first support block, so as to reach the expansion of the first support block The purpose of the thickness is to allow the first support block to support a larger gap, so as to be suitable for osteotomy gaps of different sizes, and to better support the tibia; by filling the gap at the tibial cutoff, the tibia can be ensured The overall strength of the osteotomy can avoid complications such as fracture of the osteotomy hinge, loss of postoperative fixation angle, and nonunion of the cutoff.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.

Fig. 1 is the structural representation of an embodiment of the fixed support for tibial osteotomy proposed by the present invention;

Figure 2 is a schematic enlarged view of the detail at A in Figure 1;

Fig. 3 is the local structure schematic diagram of an embodiment of the fixed support for tibial osteotomy proposed by the present invention;

Fig. 4 is a partial structural schematic diagram of another embodiment of the fixation support for tibial osteotomy proposed by the present invention.

Explanation of reference signs:

110, fixed steel plate; 120, screw hole; 130, the first waist hole; 140, the first support plate; 150, the first support block; 160, threaded rod; 170, nut; 180, the second waist hole; 190, the first A through hole; 210, the first rotating rod; 220, the first threaded hole; 230, the inner cavity; 240, the first groove; 250, the second support plate; 260, the push rod; 270, the spring; 280, the first Wedge block; 290, second wedge block; 310, slide rail; 320, connecting wall; 330, limit hole; 340, limit rod; 350, third support plate; 360, second support block; 370, second Through hole; 380, the third threaded hole; 390, the second rotating rod; 410, the second groove; 420, the fourth support plate; 430, the first connecting rod; 440, the second connecting rod; 450, the third connecting rod Rod; 460, the fourth connecting rod; 470, the first movable block; 480, the second movable block; 490, the first block.

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

In addition, in the present invention, descriptions such as "first", "second" and so on are used for description purposes only, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise specified and limited, the terms "connection" and "fixation" should be understood in a broad sense, for example, "fixation" can be a fixed connection, a detachable connection, or an integral body; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal communication between two elements or an interaction relationship between two elements, unless otherwise clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In addition, the technical solutions of the various embodiments of the present invention can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered as a combination of technical solutions. Does not exist, nor is it within the scope of protection required by the present invention.

The invention provides a fixed support for tibial osteotomy.

Please refer to accompanying drawing 1-accompanying drawing 4, in an embodiment of a kind of fixed support for tibial osteotomy proposed by the present invention, this fixed support for tibial osteotomy comprises fixed steel plate 110, the first support plate 140 and the first support member; the upper and lower parts of the fixed plate 110 are provided with a plurality of screw holes 120, and the screw holes 120 are used to pass through the fixed screws (not shown), and the fixed plate 110 is fixed to the tibia by the fixed screws.

The fixation screws here are embedded in the tibia obliquely when they are inserted into the screw holes, that is, they are not inserted at an angle perpendicular to the fixation plate 110 ; and when the fixation screws are inserted into the tibia, attention should be paid to avoid damaging interosseous ligaments and muscle tissue.

The first support plate 140 is detachably connected to the fixed steel plate 110; the first support member includes a first support block 150, a second support plate 250, a push rod 260, a first wedge block 280, a second wedge block 290 and a first rotating rod 210; the first support block 150 is connected to the side of the first support plate 140 away from the fixed steel plate 110; the first support block 150 is provided with an inner cavity 230 and a first groove 240; the second support plate 250 is connected with a push rod 260 The push rod 260 is movable through the first support block 150; the second support plate 250 is embedded in the first groove 240; the first wedge block 280 is connected to the end of the push rod 260 away from the second support plate 250; A wedge block 280 and a second wedge block 290 are both disposed in the inner cavity 230; the first rotating rod 210 is rotated and passed through the first support block 150; one end of the first rotating rod 210 located in the inner cavity 230 is used to abut against (ie movable contact) the second wedge block 290, the second wedge block 290 and the first wedge block 280 are in sliding contact.

The fixed support for tibial osteotomy proposed by the present invention can fill the gap in the tibial cutoff. Specifically, the fixed steel plate 110 is fixed to the tibia first, and then the first support block 150 is embedded in the gap in the tibial cutoff. It is also possible to drive the second wedge block 290 to slide by rotating the first rotating rod 210, and then push the first wedge block 280 up and down, so as to push the push rod 260, and then drive the second support plate 250 to move away from the first support block 150 , so as to achieve the purpose of expanding the thickness of the first support block 150, that is, to allow the first support block 150 to support a larger gap, so as to be suitable for osteotomy gaps of different sizes, and to better support the tibia; by filling The gap at the tibial amputation ensures the overall strength of the tibia and avoids complications such as fracture of the osteotomy hinge, loss of postoperative fixation angle, and nonunion at the amputation.

In addition, as shown in Figure 1, the side of the first support plate 140 away from the first support is provided with a threaded rod 160, and the threaded rod 160 is perpendicular to the first support plate 140; the fixed steel plate 110 is provided with a first waist hole 130, the length direction of the first waist hole 130 is consistent with the extension direction of the fixed steel plate 110; the threaded rod 160 is movable through the first waist hole 130, and the end of the threaded rod 160 protruding from the fixed steel plate 110 is used to screw the fixed nut 170 to fix the first support plate 140 to the fixed steel plate 110 . In this way, the position of the first support plate 140 relative to the fixed steel plate 110 can be adjusted.

At the same time, the first support block 150 is provided with a first threaded hole 220 perpendicular to the first support plate 140; The extension direction of the first support plate 140 is provided with a first through hole 190; one end of the first threaded hole 220 passes through the inner cavity 230; the other end of the first threaded hole 220 passes through the first through hole 190; the first through hole 190 It is used to connect with the second waist hole 180; the first rotating rod 210 is provided with an external thread matched with the first threaded hole 220; the first rotating rod 210 is fitted through the first threaded hole 220; the distance between the first rotating rod 210 One end of the second wedge block 290 passes through the first through hole 190 and extends into the second waist hole 180 . And one end of the first rotating rod 210 protruding into the first waist hole 130 defines a cross groove (not labeled).

Through the above technical solution, during the operation, the position of the second support plate 250 can be adjusted by inserting an electric screwdriver into the first waist hole 130 and turning the first rotating rod 210 .

In addition, the fixed support for tibial osteotomy also includes a spring 270; the push rod 260 is perpendicular to the first rotating rod 210, and the push rod 260 is parallel to the first support plate 140; the second support plate 250 is perpendicular to the first support plate 140; the spring 270 is sleeved on the push rod 260; one end of the spring 270 is connected to the inner wall of the cavity 230; the other end of the spring 270 is connected to the first wedge block 280; the spring 270 is in a compressed state, so that the second support plate 250 has A tendency to approach the first support block 150 .

By setting the spring 270, the second support plate 250 has a tendency to approach the first support block 150, and the first wedge block 280 can press the second wedge block 290 tightly to ensure the stability of the overall structure.

At the same time, the fixed support for tibial osteotomy includes a limiting rod 340; the first support block 150 includes a connecting wall 320 arranged between the first groove 240 and the inner cavity 230; the connecting wall 320 defines a limiting hole 330; The limiting rod 340 is connected to the second support plate 250 ; the limiting rod 340 is parallel to the push rod 260 ; By setting the limit rod 340, it is ensured that the second support plate 250 will not shake.

In addition, the fixed support for tibial osteotomy also includes a slide rail 310; the second wedge block 290 is provided with a slide groove (not shown); the slide rail 310 is arranged on the inner wall of the inner chamber 230 opposite to the connecting wall 320; The rail 310 is parallel to the first rotating rod 210 and perpendicular to the push rod 260 ; the sliding rail 310 is matched and embedded in the slide groove. It is set in this way to ensure that the second wedge block 290 can only slide in a straight line.

Simultaneously, as shown in accompanying drawing 4, in another embodiment, this tibial osteotomy uses fixed support member to also comprise the 3rd support plate 350 and the 2nd support member; (It is also detachably connected to the fixed steel plate 110 through the cooperation of the threaded rod 160 and the nut 170); the second support member includes the second support block 360, the fourth support plate 420, the first connecting rod 430, the second connecting rod 440 , the third connecting rod 450 , the fourth connecting rod 460 , the second rotating rod 390 , the first movable block 470 and the second movable block 480 .

The second support block 360 is arranged on the side of the third support plate 350 away from the fixed steel plate 110; the second support block 360 is provided with a second groove 410; the fourth support plate 420 can be movably embedded in the second groove 410; Both the connecting rod 430 and the second connecting rod 440 are hinged to the inner bottom wall of the second groove 410; the other end of the first connecting rod 430 is hinged to the first movable block 470; the other end of the second connecting rod 440 is hinged to the second Movable block 480; one end of the third link 450 is hinged to the fourth support plate 420, and the other end is hinged to the first movable block 470; one end of the fourth link 460 is hinged to the fourth support plate 420, and the other end is hinged to the second Movable block 480; the central axes of the first connecting rod 430, the second connecting rod 440, the third connecting rod 450 and the fourth connecting rod 460 are on the same plane; the second rotating rod 390 is partially provided with external threads; the first moving block 470 A second threaded hole (not shown) cooperating with the external thread of the second rotating rod 390 is provided, and the first movable block 470 is closer to the fixed steel plate 110 than the second movable block 480; one end of the second rotating rod 390 rotates Passed through the second movable block 480 , the second rotating rod 390 is screwed on the first movable block 470 through the second threaded hole; the second rotating rod 390 is movably passed through the second supporting block 360 .

When in use, the fixed steel plate 110 is first fixed to the tibia, and then the second support block 360 is embedded in the gap that appears at the cut-off part of the tibia, and then the fourth support plate 420 can be driven relative to the second support block by rotating the second rotating rod 390. 360 moves, so as to achieve the purpose of expanding the thickness of the second support block 360, that is, to allow the second support block 360 to support a larger gap, so as to be suitable for different sizes of osteotomy gaps, and to better support the tibia

In addition, one end of the second rotating rod 390 is provided with a first block 490; the first block 490 is located on the side of the second movable block 480 away from the first movable block 470; the first block 490 is used to prevent the second rotation The rod 390 is disengaged from the second movable block 480 . The second support block 360 is provided with a third threaded hole 380 perpendicular to the third support plate 350; the third support plate 350 is provided with a second through hole 370; one end of the third threaded hole 380 passes through the second groove 410; the third The other end of the threaded hole 380 passes through the second through hole 370; the second through hole 370 is used to communicate with the second waist hole 180; the second rotating rod 390 is provided with an external thread matched with the third threaded hole 380; the second rotating rod 390 fits through the third threaded hole 380 ; the end of the second rotating rod 390 away from the second movable block 480 passes through the second through hole 370 and extends into the second waist hole 180 . Through the above-mentioned technical proposal, the structure of the fixed support member for tibial osteotomy is perfected. Both the above-mentioned first support member and the second support member are made of titanium alloy, which ensures better structural strength and better affinity with human tissue.

The above is only a preferred embodiment of the present invention, and does not therefore limit the patent scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or direct/indirect use All other relevant technical fields are included in the patent protection scope of the present invention.

Claims (5)

1. A fixed support for tibial osteotomy, characterized in that it comprises a fixed steel plate, a first support plate and a first support; the first support plate is detachably connected to the fixed steel plate; the first The support includes a first support block, a second support plate, a push rod, a first wedge block, a second wedge block and a first rotating rod; the first support block is connected to the fixed One side of the steel plate; the first support block is provided with an inner cavity and a first groove; the second support plate is connected with the ejector rod; the ejector rod is movable through the first support block; The second support plate is embedded in the first groove; the first wedge block is connected to the end of the push rod away from the second support plate; the first wedge block and the second The wedge-shaped blocks are all arranged in the inner cavity; the first rotating rod is rotated through the first supporting block; one end of the first rotating rod located in the inner cavity is used to abut against the first rotating rod. Two wedge blocks, the second wedge block and the first wedge block cooperate and slide in contact; A threaded rod is provided on the side of the first support plate away from the first support member, and the threaded rod is perpendicular to the first support plate; the fixed steel plate is provided with a first waist hole; the thread The rod is movable through the first waist hole, and one end of the threaded rod protruding from the fixed steel plate is used to screw a fixed nut to fix the first support plate to the fixed steel plate; It also includes a spring; the push rod is perpendicular to the first rotating rod, and the push rod is parallel to the first support plate; the second support plate is perpendicular to the first support plate; the spring sleeve One end of the spring is connected to the inner wall of the cavity; the other end of the spring is connected to the first wedge block; the spring is in a compressed state so that the second support The plate has a tendency to approach said first support block. 2. A fixed support for tibial osteotomy according to claim 1, wherein the first support block is provided with a first threaded hole perpendicular to the first support plate; the fixed steel plate A second waist hole is opened; the first support plate is opened with a first through hole; one end of the first threaded hole passes through the inner cavity; the other end of the first threaded hole passes through the first through hole ; the first through hole is used to communicate with the second waist hole; the first rotating rod is provided with an external thread matched with the first threaded hole; the first rotating rod is fitted through the The first threaded hole; the end of the first rotating rod away from the second wedge block is passed through the first through hole and extends into the second waist hole. 3 . The fixed support for tibial osteotomy according to claim 2 , characterized in that, one end of the first rotating rod extending into the first waist hole is provided with a cross groove. 4 . 4. A fixed support for tibial osteotomy according to claim 3, further comprising a limit rod; said first support block includes The connecting wall between them; the connecting wall is provided with a limit hole; the limit rod is connected to the second support plate; the limit rod is parallel to the ejector rod; the limit rod cooperates to slide through on the connecting wall. 5. A fixed support for tibial osteotomy according to claim 4, further comprising a slide rail; the second wedge block is provided with a slide groove; the slide rail is arranged in the inner cavity The inner wall opposite to the connecting wall; the slide rail is parallel to the first rotating rod; the slide rail is mated and embedded in the slide groove.

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