CN111374804B

CN111374804B - Knee joint tibial plateau false body

Info

Publication number: CN111374804B
Application number: CN202010237771.8A
Authority: CN
Inventors: 史春宝; 许奎雪; 张朝锋; 张悦; 史春生; 王振国
Original assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Current assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2022-05-20
Anticipated expiration: 2040-03-30
Also published as: CN111374804A

Abstract

The invention provides a knee joint tibial plateau prosthesis which comprises a tibial plateau prosthesis and a tibial tubercle prosthesis, wherein the tibial tubercle prosthesis is arranged at a tibial tubercle of the tibial plateau prosthesis, the part of the tibial tubercle prosthesis, which protrudes out of the tibial plateau prosthesis, is of a trabecular bone structure, the trabecular bone structure is provided with a recessed arrangement groove for arranging a free lower bone block of the tibial tubercle connected with a patellar tendon at a patellar tendon stop point, a solid cross beam with a smooth surface is arranged on a notch of the arrangement groove in a crossing manner, the cross beam and the trabecular bone structure are integrally arranged, and patellar ligament suture holes are symmetrically arranged on the prostheses at two sides of the cross beam. Wherein, the arrangement groove can provide the replanting space for the free bone piece down of kneecap tendon, guarantees the complete implantation of kneecap ligament on tibial plateau false body, the crossbeam can make the kneecap ligament can wholly twine fixedly, avoids the stress dispersion of kneecap ligament, just the crossbeam sets up with the trabecula structure is integrative, further avoids the crossbeam to take place not hard up owing to be in the flexible drive of kneecap ligament for a long time.

Description

Knee joint tibial plateau false body

Technical Field

The invention relates to the technical field of human body bone prosthesis replacement, in particular to a knee joint tibial plateau prosthesis.

Background

Primary and secondary malignant bone tumors are lesions of tumors of the motor system that seriously threaten the survival and quality of life of patients. With the development of surgical operation technology, the innovation of tumor imaging technology and the development of new adjuvant chemotherapy for malignant tumor patients, limb protection surgery has become a consensus for the treatment of malignant bone tumors. Knee prostheses are surgical implants used to replace the knee, which are used in superficial knee replacement surgery of the knee, treating the damaged knee and replacing it with a knee prosthesis. The existing knee joint prosthesis mainly comprises: the tibia bone connecting device comprises a femur prosthesis used for being connected with a femur of a human body, a tibia platform used for being connected with a tibia of the human body, and a gasket positioned between the femur prosthesis and the tibia platform; among the tibial plateau among the prior art, the fixed mode of patellar ligament is generally that fix with pressure is withheld to the fix with screw fixation plate, because knee joint motion, the patellar ligament can be high-frequency flexible when the knee joint activity, and the fix with screw plate is not hard up owing to be in the flexible drive of patellar ligament for a long time taking place, and then need renovate the prosthesis or cause the prosthesis replacement failure, brings unnecessary injury and loss for the patient.

Disclosure of Invention

The present invention provides a knee joint tibial plateau prosthesis for solving the above-mentioned technical problems.

The embodiment of the invention provides a knee joint tibial plateau prosthesis, which comprises: tibial plateau false body and tibial tubercle false body, tibial tubercle false body sets up tibial plateau false body's tibial tubercle department, the tibial tubercle false body evagination is the trabecular bone structure in the partial of tibial plateau false body, the trabecular bone structure is last to be equipped with an indent setting, is used for settling the tibial tubercle from the free resettlement groove of the free lower bone piece of patellar tendon department of patellar tendon, it is equipped with a smooth entity crossbeam in surface to span on the notch of resettlement groove, crossbeam and the integrative setting of trabecular bone structure, just the symmetry is equipped with patellar ligament suture hole on the false body of crossbeam both sides.

Preferably, the placing groove is provided with a first notch which is arranged upwards along the inclination angle of the tibial tuberosity and a second notch which is arranged vertically outwards.

Preferably, the cross beam is erected across the second notch.

Preferably, the cross beam is an arched cross beam, and the convex radian of the arched cross beam is consistent with that of the tibial tubercle.

Preferably, the patellar ligament suture holes are symmetrically arranged on the left and right side supporting legs of the cross beam.

Preferably, the openings of the suture holes are polished.

Preferably, an inward concave embedding groove is formed in a tibial tubercle of the tibial plateau prosthesis, the tibial tubercle prosthesis is embedded in the embedding groove, the part of the tibial tubercle prosthesis, which is embedded in the placing groove, is of a solid structure, and the part of the tibial tubercle prosthesis, which protrudes out of the tibial plateau prosthesis, is of a trabecular bone structure.

Preferably, the size of the trabecular bone structure in the placement groove is larger than that of the trabecular bone structure on the outer convex surface of the tibial tubercle prosthesis.

Preferably, the size of the trabecular bone structure on the inner surface of the placement groove is 100um-400um, the size of the trabecular bone structure on the outer convex surface of the tibial tubercle prosthesis is 40um-200um,

preferably, the tibia tubercle prosthesis and the tibia platform prosthesis are integrally arranged in a welding mode, and the cross beam and the bone trabecula structure are integrally arranged in a 3D printing process.

According to the knee joint tibial plateau prosthesis, the arrangement groove for arranging the free lower bone block of the patellar tendon at the patellar tendon stop point of the tibial tubercle is arranged, the replanting space is provided for the free lower bone block of the patellar tendon connected with the patellar ligament, the patellar ligament is ensured to be completely implanted on the knee joint tibial plateau prosthesis, meanwhile, the patellar ligament can be integrally wound and fixed by the cross beam arranged on the groove opening of the arrangement groove in a crossing manner, the stress dispersion of the patellar ligament is avoided, the cross beam and the trabecular bone structure of the tibial plateau prosthesis are integrally arranged, and the cross beam is further prevented from being loosened under the long-term stretching driving of the patellar ligament.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a front view of a tibial plateau prosthesis according to an embodiment of the present invention;

FIG. 2 is a front view of a tibial tuberosity prosthesis mounted on a tibial plateau prosthesis, in accordance with an embodiment of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

The embodiment of the invention provides a knee joint tibial plateau prosthesis 1, which comprises: tibial plateau false body 1 and tibial tubercle false body 2, tibial tubercle false body 2 sets up tibial tubercle department of tibial plateau false body 1, the part that tibial tubercle false body 2 evagination was out tibial plateau false body 1 is bone trabecula structure 21, be equipped with an indent setting on the bone trabecula structure 21, be used for settling the tibial tubercle from patellar tendon stop point department and link the free groove 22 of laying down bone piece of patellar tendon, it is equipped with a glossy solid crossbeam 23 in surface to span on the notch of groove 22 to lay, crossbeam 23 sets up with the trabecula structure 21 is integrative, just the symmetry is equipped with patellar ligament suture hole 24 on the false body of crossbeam 23 both sides.

Through setting up the arrangement groove 22 that is used for settling the tibia tuberosity from the free bone piece down of patellar tendon department of patellar tendon stop point, for providing the space of replanting with the free bone piece down of patellar tendon that is connected with the patellar ligament, guarantee that the complete implantation of patellar ligament is on knee joint tibial plateau prosthesis 1, simultaneously through spaning crossbeam 23 that sets up on arrangement groove 22 notch, make the patellar ligament can wholly twine fixedly, avoid the stress dispersion of patellar ligament, just crossbeam 23 sets up with the trabecula structure 21 an organic whole of tibial tubercle prosthesis 2, further avoids crossbeam 23 to take place to become flexible owing to being in the flexible drive of patellar ligament for a long time.

Example 1

The embodiment 1 of the present invention provides a knee joint tibial plateau prosthesis 1, which includes: tibial plateau prosthesis 1 and tibial tubercle prosthesis 2, the patellar ligament of the knee joint is sutured on tibial tubercle prosthesis 2.

For guaranteeing knee joint tibial plateau false body 1's bulk strength and proportion, tibial plateau false body 1 adopts titanium alloy to forge technical production and obtains, tibial tubercle false body 2 adopts 3D printing technology production to obtain, because the patellar ligament of knee joint is sewed up on tibial tubercle false body 2, in view of the joint of knee joint for the human body joint of often moving, and the patellar ligament can be high-frequency flexible when the knee joint activity, consequently, a tibial tubercle false body 2 and tibial plateau false body 1 an organic whole setting for fixing the patellar ligament avoids tibial tubercle false body 2 to take place to become flexible owing to being in the flexible drive of patellar ligament for a long time, and then needs to overhaul the false body or cause the false body replacement failure, brings unnecessary injury and loss for the patient. Preferably, the tibial plateau prosthesis 1 is welded to the tibial tubercle prosthesis 2.

As shown in fig. 1, tibial tubercle department of tibial plateau prosthesis 1 is equipped with an indent and inlays groove 11, tibial tubercle prosthesis 2 inlays to establish to be fixed inlay in groove 11, it is concrete, tibial tubercle prosthesis 2 part evagination in tibial plateau prosthesis 1, and the protruding radian of its evagination is unanimous with the protruding radian of patient's tibial tubercle, the protruding radian of patient's tibial tubercle can obtain through medical detection. The part of the tibial tubercle prosthesis 2 embedded in the mounting groove 22 is of a solid structure, so that the overall strength of the tibial tubercle prosthesis 2 and the integral connection between the tibial tubercle prosthesis 2 and the tibial plateau prosthesis 1 are ensured, the part of the tibial tubercle prosthesis 2 protruding out of the tibial plateau prosthesis 1 is of a trabecular bone structure 21, and the design of the trabecular bone structure 21 can promote bone ingrowth and soft tissue attachment, so that the recovery period of a patient is shortened.

In the knee joint prosthesis replacement operation, in order to ensure that the patellar ligament is implanted on the knee joint tibial plateau prosthesis 1 more completely, a doctor can take down the free lower bone block of the patellar tendon connected with the patellar ligament from the necrotic tibia of a patient, therefore, the knee joint tibial plateau prosthesis 1 is provided with a placement groove 22 for placing the free lower bone block of the patellar tendon connected with the patellar tendon at the patellar tendon stop point, specifically, as shown in fig. 2, a trabecular bone structure 21 of the tibial plateau prosthesis 2 is provided with a concave placement groove 22 for placing the free lower bone block of the patellar tendon connected with the patellar tendon at the patellar tendon stop point.

The placing groove 22 has the first notch that sets up along the inclination of shin bone tuberosity and the perpendicular second notch that outwards sets up, span on the second notch and be equipped with a crossbeam 23, supply the whole winding of patellar ligament fixed, avoid the stress dispersion of patellar ligament, it is specific, crossbeam 23 is an arch crossbeam 23, the protruding radian of arch crossbeam 23 is unanimous with the protruding radian of shin bone tuberosity, just crossbeam 23 sets up with trabecula structure 21 is integrative, and is preferred, crossbeam 23 adopts the integrative setting of 3D printing technology with trabecula structure 21, further avoids crossbeam 23 to take place to become flexible owing to being in the flexible drive of patellar ligament for a long time. Patellar ligament suture holes 24 are symmetrically formed in the prosthesis on the two sides of the cross beam 23, as shown in fig. 2, the widths of the left and right sides of the cross beam 23 are larger than the width of the cross beam 23, and a plurality of patellar ligament suture holes 24 are symmetrically formed in the left and right side support bodies. In carrying out knee joint prosthesis replacement operation, the doctor can pass first notch winding on the crossbeam 23 of second notch with the patellar ligament to the free bone piece of laying down of the connective patellar tendon that is connected with the patellar ligament in settling groove 22, sew up the patellar ligament respectively on the patellar ligament suture hole 24 of crossbeam 23 and crossbeam 23 both sides again, through twine the patellar ligament on crossbeam 23, make the patellar ligament when the joint drives is flexible, flexible tension is dispersed and is cleared up by the patellar ligament part that revolutes on crossbeam 23, consequently, the fixed end ligament of the patellar of sewing up on suture hole 24 can not take place to become flexible because of dragging. Further, in order to ensure the strength of the beam 23, the beam 23 is a solid body, and in order to avoid the suture line from being worn, the beam 23 and the opening of the suture hole 24 are both polished.

As shown in fig. 2, the inner groove surface of the placement groove 22 and the outer convex surface of the tibial tubercle prosthesis 2 are both the trabecular bone structures 21, but according to different functions, the trabecular bone structures 21 at different positions are correspondingly different, namely, the size of the trabecular bone structure 21 in the placement groove 22 is larger than that of the trabecular bone structure 21 on the outer convex surface of the tibial tubercle prosthesis 2, preferably, the size of the trabecular bone structure 21 on the inner groove surface of the placement groove 22 is 100um-400um, which is convenient for bone ingrowth, and the size of the trabecular bone structure 21 on the outer convex surface of the tibial tubercle prosthesis 2 is 40um-200um, which is convenient for soft tissue attachment.

According to the knee joint tibial plateau prosthesis 1, the arrangement groove 22 for arranging the free lower bone block of the patellar tendon at the patellar tendon insertion point of the tibial tubercle is arranged to provide a replanting space for the free lower bone block of the patellar tendon connected with the patellar ligament, so that the patellar ligament is completely implanted on the knee joint tibial plateau prosthesis 1, meanwhile, the patellar ligament can be integrally wound and fixed by crossing the cross beam 23 arranged on the notch of the arrangement groove 22, the stress dispersion of the patellar ligament is avoided, the cross beam 23 and the trabecular bone structure 21 of the tibial tubercle prosthesis 2 are integrally arranged, and the cross beam 23 is further prevented from being loosened due to the fact that the cross beam is driven by the extension and retraction of the patellar ligament for a long time.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A knee tibial plateau prosthesis, comprising: tibial plateau main part and tibial tubercle false body, the tibial tubercle department of tibial plateau main part is equipped with an indent and inlays the groove, tibial tubercle false body inlays to be established inlay in the groove, wherein, the part that tibial tubercle false body inlayed in inlaying the groove is the entity structure, the tibial tubercle false body evagination is the trabecular bone structure in the part of tibial plateau main part, be equipped with an indent setting on the trabecular bone structure, be used for settling the tibial tubercle from the free groove of the free bone piece of patellar tendon stop point department, it is equipped with a surperficial glossy entity crossbeam to span on the notch in groove to set, the entity crossbeam is used for the winding of patellar ligament fixed, crossbeam sets up with the trabecular bone structure is integrative, just the symmetry is equipped with patellar ligament suture hole on the tibial tubercle false body of crossbeam both sides.

2. The tibial plateau knee prosthesis of claim 1 wherein the cross-member is an arcuate cross-member having a convex curvature corresponding to a convex curvature of the tibial tubercle.

3. The tibial plateau of claim 1, wherein said patellar ligament suture holes are symmetrically disposed on the left and right lateral legs of the cross member.

4. The knee tibial plateau prosthesis of claim 1, wherein the apertures of the suture holes are each polished.

5. The tibial plateau knee of claim 1 wherein the trabecular structure on the inner surface of the groove of the seating groove has a greater dimension than the trabecular structure on the outer convex surface of the tibial tuberosity prosthesis.

6. The tibial plateau of claim 5, wherein the size of the trabecular structure of the inner surface of the groove of the seating groove is 100um to 400um, and the size of the trabecular structure of the outer convex surface of the tibial tuberosity prosthesis is 40um to 200 um.

7. The knee joint tibial plateau prosthesis of claim 1, wherein the tibial tubercle prosthesis and the tibial plateau main body are integrally arranged in a welding manner, and the cross beam and the trabecular bone structure are integrally arranged in a 3D printing process.