CN216148178U - Wound implant for treating anterior/posterior cruciate ligament tibial insertion fracture - Google Patents

Abstract

The utility model discloses a wound implant for treating anterior/posterior cruciate ligament tibial insertion fracture, and belongs to the technical field of orthopedic implants. In the utility model, the two sides of the gasket main body are provided with the wing pieces, the lower surfaces of the wing pieces are provided with the sharp teeth, the wing pieces can obviously increase the torque of the sharp teeth, so that the gasket main body is more firmly fixed, and the tension screw is arranged on the gasket main body, so that the fracture block can be firmly fixed, the fixation is firm and reliable, the torsion resistance is sufficient, and the fracture block is not easy to loosen.

Description

Wound implant for treating anterior/posterior cruciate ligament tibial insertion fracture

Technical Field

The utility model relates to the technical field of orthopedic implants, in particular to a wound implant for treating anterior/posterior cruciate ligament tibial insertion fracture.

Background

The options for anterior/posterior cruciate ligament tibial insertion fracture surgery fall into two broad categories: one is arthroscopic fixation and the other is incision reduction internal fixation. The operation under the arthroscope is difficult, the technical requirements on the operation of doctors are high, the resetting and fixing effects are not ideal generally, the incision resetting and internal fixation can better expose the attachment of the insertion point of the posterior cruciate ligament, the wound is small, and the postoperative recovery is fast.

The internal fixation materials adopted by the internal fixation operation for fracture reduction of tibial insertion point of anterior/posterior cruciate ligament mainly comprise steel wires, suture, absorbable screws, cancellous screws, anchoring nails and the like, and different materials respectively have advantages and disadvantages, which are respectively explained as follows:

(1) steel wire: the fracture block is bound and fixed by adopting a steel wire, so that the bone block and the ligament are easy to cut, and the fracture block and the ligament are firmly fixed by braking the affected limb after the operation;

(2) absorbable screw + cancellous bone screw + spacer: the absorbable screw or cancellous screw is adopted to firmly fix the fracture block, for the patient with serious fracture, the spacer is added to pressurize and strengthen the fixation, and if necessary, a high-strength suture is used for suturing the fracture block or the ligament far end which cannot be fixed by the screw. The screw has the defects of insufficient torsion resistance and risk of screw breakage, and is easy to loosen due to early absorption;

(3) anchoring: the adoption anchor nail is deeply buried in the bone, and the fracture piece that will tear off and the back cruciate ligament is fixed with the suture of non-absorbable pulling force, but the postoperative early activity is favorable to the function to be resumeed, and single piece of anchor nail is fixed the relatively poor reliability.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a wound implant for treating anterior/posterior cruciate ligament tibia end fracture, which can firmly fix and firmly fix a fracture block.

In order to solve the technical problems, the utility model provides the following technical scheme:

the wound implant for treating the fracture of the tibial insertion point of the anterior/posterior cruciate ligament comprises a gasket main body used for pressing ligaments near the tibial insertion point of the ligament on a tibial platform, wherein wing pieces are arranged on two sides of the gasket main body, sharp teeth used for being pressed on the tibial platform are arranged on the lower surfaces of the wing pieces, a screw hole is formed in the middle of the gasket main body, and a tension screw is arranged in the screw hole.

Further, the gasket body is circular.

Further, the gasket body and the wing pieces are integrally spindle-shaped.

Further, the fins are positioned on the front side and the rear side of the sagittal plane of the gasket body, and/or the included angle between the plane of the gasket body and the plane of the fins is 100-140 degrees.

Furthermore, the lower surface of the gasket main body is provided with a plurality of semicircular bulges.

Further, the tines are located on a lower surface of the end of the tab distal from the pad body.

Furthermore, the lag screw is a hollow screw.

Further, bone cement is filled in the hollow screw.

Further, the length of the lag screw is 30-55 mm.

Further, the outer diameter of the nut of the lag screw is larger than the inner diameter of the screw hole.

The utility model has the following beneficial effects:

according to the wound implant for treating the tibial insertion fracture of the anterior/posterior cruciate ligament, the wing pieces are arranged on the two sides of the gasket main body, the sharp teeth are arranged on the lower surfaces of the wing pieces, the wing pieces can obviously increase the torque of the sharp teeth, so that the gasket main body is fixed more firmly, and the tension screw is arranged on the gasket main body, so that the wound implant can firmly fix a fracture block, is fixed firmly and reliably, has sufficient torsion resistance, and is not easy to loosen.

Drawings

FIG. 1 is a schematic view of the overall structure of a wound implant for the treatment of anterior/posterior cruciate ligament tibial insertion fractures according to the present invention;

FIG. 2 is a perspective view of a plate in the wound implant of FIG. 1;

FIG. 3 is a front view of a plate body of the wound implant of FIG. 1;

FIG. 4 is a side view of a plate body of the wound implant of FIG. 1;

FIG. 5 is a schematic view of the wound implant of FIG. 1 in relation to a posterior cruciate ligament tibial insertion site;

fig. 6 is a schematic view of the wound implant of fig. 1 in relation to an anterior cruciate ligament tibial insertion point.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

The utility model provides a wound implant for treating anterior/posterior cruciate ligament tibia end fracture, which comprises a gasket main body 1 used for pressing ligaments near the ligament tibia end fracture on a tibial platform 6, wherein wing pieces 2 are arranged on two sides of the gasket main body 1, sharp teeth 3 used for being pressed on the tibial platform 6 are arranged on the lower surfaces of the wing pieces 2, a screw hole 4 is arranged in the middle of the gasket main body 1, and a tension screw 5 is arranged in the screw hole 4.

When using in the art, at first split ligament near the ligament shin bone dead center from it, then with gasket main part 1 through the ligament opening part in, sharp tooth 3 tightly presses on the bone piece, and fin 2 is impressed as far as possible on the 6 spongy bone of tibial plateau, punches the back through the drill bit, utilizes lag screw 5 to firmly fix gasket main part 1 and broken bone piece on tibial plateau 6 through screw hole 4, accomplishes firmly fixedly.

According to the wound implant for treating the tibial insertion fracture of the anterior/posterior cruciate ligament, the wing pieces are arranged on the two sides of the gasket main body, the sharp teeth are arranged on the lower surfaces of the wing pieces, the wing pieces can obviously increase the torque of the sharp teeth, so that the gasket main body is fixed more firmly, and the tension screw is arranged on the gasket main body, so that the wound implant can firmly fix a fracture block, is fixed firmly and reliably, has sufficient torsion resistance, and is not easy to loosen. The utility model is simultaneously suitable for treating the tibial insertion fracture of the anterior/posterior cruciate ligament, adopts a gasket form, only needs to be matched with a lag screw, has large and firm fixing range, and can recover the anatomical structure of the knee joint, the tension of the anterior/posterior cruciate ligament and the stability of the knee joint.

The spacer body 1 is preferably rounded to form a smooth surface to avoid damage to the surrounding ligaments. The overall shim body 1 and the fins 2 are preferably spindle-shaped (fig. 3), i.e., the fins 2 taper in size from the end near the shim body 1 to the end away from the shim body 1, so that the overall implant is of a smaller size with less interference with surrounding tissue, and the fins 2 are more easily pressed into the cancellous bone of the tibial plateau 6 (fig. 6).

To further improve the fixation of the implant, the wings 2 are preferably located on the anterior and posterior sides of the sagittal plane of the spacer body 1 (fig. 5-6). Furthermore, the angle α between the plane of the main body 1 and the plane of the wing 2 is preferably 100 ° to 140 °, for example 110 °, so as to better match the shape of the surface of the tibial plateau 6 and improve the fixation.

The lower surface of gasket main part 1 can be equipped with a plurality of semi-circular archs (not shown), and semi-circular arch can be better fixed ligament on the one hand, forms the clearance between the semi-circular arch of on the other hand, can ensure that pressure is unlikely to too big at fixed in-process to avoid the ligament to be extruded necrosis scheduling problem. The tines 3 are preferably located on the lower surface of the end of the tab 2 remote from the pad body 1 so that the moment of the tines 3 is the longest and the securing effect is the best.

The lag screw 5 is of conventional construction in the art, having external threads 51 only at the distal end, and a polished rod 52 in the middle and proximal ends. The lag screw 5 can be a hollow screw to reserve bone as much as possible, is beneficial to postoperative recovery and is convenient to be positioned by matching with a guide pin; the hollow screw can be filled with bone cement to improve the firmness of screw fixation.

The length of the lag screw 5 can be 30-55mm in consideration of the size of the tibial plateau 6, and the fixing effect is better. The outer diameter of the nut 53 of the lag screw 5 is preferably larger than the inner diameter of the screw hole 4, so that the lower surface of the nut 53 presses on the gasket main body 1, the screw pulling force can be uniformly distributed on the whole gasket main body 1, and the fixing effect of the gasket main body 1 on the ligament is improved.

In summary, the wound implant for treating anterior/posterior cruciate ligament tibial insertion fracture of the present invention has the following advantages:

(1) the anterior/posterior cruciate ligaments are simultaneously applicable, the operation is simple, and the applicability is strong;

(2) the fracture block can be fixed in the largest area by adopting a large-angle (100-140 degrees) design, so that strong fixation is realized;

(3) the fins at the two ends of the gasket main body are provided with sharp teeth, so that surrounding bone blocks are effectively fixed and held;

(4) the overlooking appearance of the gasket main body and the wing is spindle-shaped, so that the gasket main body and the wing can be conveniently pressed into cancellous bone when being implanted.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (10)

1. The wound implant for treating the anterior/posterior cruciate ligament tibial insertion fracture is characterized by comprising a gasket main body used for pressing ligaments near the ligament tibial insertion onto a tibial platform, wherein fins are arranged on two sides of the gasket main body, sharp teeth used for being pressed onto the tibial platform are arranged on the lower surfaces of the fins, a screw hole is formed in the middle of the gasket main body, and a tension screw is arranged in the screw hole.

2. The wound implant of claim 1, wherein the spacer body is circular.

3. The wound implant of claim 1, wherein the pad body and fins are generally spindle-shaped.

4. The wound implant of claim 1, wherein the tabs are located on both anterior and posterior sides of the sagittal plane of the spacer body, and/or wherein the angle between the plane of the spacer body and the plane of the tabs is between 100 ° and 140 °.

5. The wound implant of claim 1, wherein the lower surface of the spacer body is provided with a plurality of semi-circular protrusions.

6. The wound implant of claim 1, wherein the tines are located on a lower surface of the end of the fin distal to the spacer body.

7. The wound implant of any one of claims 1-6, wherein the lag screw is a cannulated screw.

8. The wound implant of claim 7, wherein the cannulated screws are filled with bone cement.

9. The wound implant of claim 7, wherein the lag screw has a length of 30-55 mm.

10. The wound implant of claim 7, wherein an outer diameter of the nut of the lag screw is greater than an inner diameter of the screw hole.

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