CN218500870U

CN218500870U - Bionic semi-joint prosthesis for reconstructing ligament pivot

Info

Publication number: CN218500870U
Application number: CN202221924200.2U
Authority: CN
Inventors: 郭凤达; 岳术俊; 许奎雪; 董浩
Original assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Current assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2023-02-21
Anticipated expiration: 2032-07-25

Abstract

The utility model discloses a bionic type semi-joint prosthesis for reconstructing ligament pivot, belonging to the technical field of bone rehabilitation; it comprises a tibia basal body and a platform pad; the tibia substrate is a bionic structure of a tibia of a patient, the upper end surface of the tibia substrate is provided with an edge bulge and a concave plane, and the edge bulge surrounds the concave plane; a plurality of first grooves for uniformly bearing force are arranged at the top of the edge bulge; the upper plane of the plane pad is of a bionic structure with the physiological radian of the femoral condyle; the lower surface of the plane pad is provided with a boss and protruding claws, and the protruding claws are distributed on the periphery of the boss; the platform pad is positioned on the upper end face of the tibia base body, the protruding claws correspond to the first grooves one to one, and the bosses correspond to the concave planes. The utility model discloses the atress is balanced, the cooperation is stable to can keep each ligament function.

Description

Bionic semi-joint prosthesis for reconstructing ligament pivot

Technical Field

The utility model relates to the technical field of bone rehabilitation, in particular to a bionic type semi-joint prosthesis for reconstructing a ligament pivot.

Background

At present, primary and secondary malignant bone tumors are motor system tumor lesions seriously threatening the survival and life quality 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. In the prior art, an anchoring nail tibia prosthesis structure is adopted, which has large contact abrasion with a femur condyle and is not matched with residual tibia bone; the fixing anchor is inserted into the bone and placed in a cancellous bone part, so that the tibia is not firmly fixed and is easy to loosen; when the positioning convex piles are placed, anterior and posterior cruciate ligaments and collateral ligaments can be damaged, and the functions of the knee joint can be damaged.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a rebuild bionical type semi-joint prosthesis of ligament fulcrum, its atress is balanced, the cooperation is stable to can keep each ligament function.

In order to realize the purpose, the utility model discloses the technical scheme who takes does:

the bionic semi-joint prosthesis for reconstructing the ligament pivot comprises a tibia substrate and a platform pad;

the tibia substrate is a bionic structure of a tibia of a patient, the upper end surface of the tibia substrate is provided with an edge bulge and a concave plane, and the edge bulge surrounds the concave plane; a plurality of first grooves for uniformly bearing force are arranged at the top of the edge bulge; the upper plane of the plane pad is of a bionic structure with the physiological radian of the femoral condyle; the lower surface of the plane pad is provided with a boss and protruding claws, and the protruding claws are distributed on the periphery of the boss; the platform pad is positioned on the upper end surface of the tibia substrate, the protruding claws correspond to the first grooves one by one, and the bosses correspond to the concave planes;

two sides of the tibia base body are respectively provided with a second groove, and steel plates connected through screws are attached to the second grooves in a matching manner; the inner sides of the steel plate and the groove are provided with rough pitted surfaces for pressing the collateral ligaments; the tibia base body is provided with a through hole for suturing an anterior cruciate ligament and a posterior cruciate ligament; the through hole extends downwards to two sides from the upper end surface of the tibia base body, and a straight hole opposite to the through hole is formed in the middle of the platform pad.

Furthermore, the number of the first grooves is 5, and the number of the protruding claws corresponding to the first grooves is 5.

Further, the material of the platform pad is polyethylene.

Furthermore, the centers of the tibia basal body and the platform pad are provided with through holes for suturing the anterior cruciate ligament and the posterior cruciate ligament

Further, the lower end of the tibia basal body is a cone matching structure used for matching with the osteotomy segment or the broach.

Furthermore, the front surface of the tibia basal body is also provided with a trabecula for facilitating bone growth and a suture hole for suturing a patellar ligament.

Further, the boss and the concave plane are fixedly connected through a buckle structure.

The utility model adopts the beneficial effect that above-mentioned technical scheme produced lies in:

1. the utility model discloses well platform pad 04's last plane reduces the wearing and tearing of stretching out and bending according to the design of thighbone condyle physiological radian to adopt the polyethylene material design, protect the thighbone condyle to receive the wound less more.

2. The utility model discloses well platform pad 04 is according to shin bone plane profile modeling design, and the outline is identical with the shin bone cross-section, has different models, can be big or small, and children and adult all can use.

3. The utility model discloses be provided with 5 abrupt claws below well platform pad 04, just in time with 5 recess phase-matchs of shin bone base member 03, abrupt claw evenly distributed reaches the equilibrium of atress, makes platform pad 04 and shin bone base member 03 cooperation more stable.

4. The utility model discloses in do the recess in the both sides of shin bone base member 03, the steel sheet that attaches the matching passes through the screw connection, and the hole is left to the centre to design coarse pitted surface on the shin bone false body, increase frictional force is used for compressing tightly the collateral ligament of side. The middle of the tibia prosthesis is provided with a hole for suturing the anterior cruciate ligament and the posterior cruciate ligament. The trabecular bone design in front of the tibial prosthesis is convenient for bone ingrowth, and the suture hole design is added to suture the patellar ligament and keep the functions of all ligaments, thereby recovering the functions of the knee joint.

5. The utility model discloses well false body upper portion is the matched stack formula, and the selection of different osteotomy positions is accomplished to the osteotomy section or the broach of accessible matched stack difference, and osteotomy section and broach all have the finished product, cuts the difference of bone position according to the patient, can directly choose for use, need not reprocess, realize supplying of material at once.

Drawings

FIG. 1 is an exploded view of the structure of the present embodiment;

FIG. 2 is a schematic structural diagram of the present embodiment;

FIG. 3 is a schematic view of the bottom surface of the platen pad of the present embodiment;

FIG. 4 is a schematic side view of the platen pad of this embodiment;

FIG. 5 is a schematic front view of the platen pad of the present embodiment;

FIG. 6 is a side view of the tibial base of the present embodiment;

FIG. 7 is a schematic front view of the tibial base of the present embodiment;

FIG. 8 is a schematic front view of a tibial base with an osteotomy segment in accordance with this embodiment;

FIG. 9 is a schematic front view of a tibial base with a broach in accordance with this embodiment;

FIG. 10 is a schematic view of the position of the slot on the upper surface of the tibial base according to this embodiment;

FIG. 11 is a schematic cross-sectional view of C-C of FIG. 10;

FIG. 12 is a schematic cross-sectional view of the tibial base of this embodiment;

fig. 13 is an enlarged schematic view of the snap structure in the present embodiment.

FIG. 14 is a schematic view of a snap position of the platform pad of the present embodiment;

fig. 15 isbase:Sub>A schematic cross-sectional viewbase:Sub>A-base:Sub>A of fig. 14.

In the figure: 01. the bone plate comprises a first steel plate 02, a second steel plate 03, a tibia basal body 04, a platform pad 05, a claw, a through hole 06, a through hole 07, a trabecula bone 08, a suture hole 09, a cone matching structure 10, a rough pitted surface 11, a bone cutting section 12, a medullary needle 14 and a clamping groove structure.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

The bionic type half-joint prosthesis for reconstructing a ligament fulcrum comprises a tibia substrate and a platform pad;

two sides of the tibia base body are respectively provided with a second groove, and a steel plate which is connected through screws is attached to the outside of the second grooves; the inner sides of the steel plate and the groove are provided with rough pitted surfaces for pressing the collateral ligaments; the tibia base body is provided with a through hole for suturing an anterior cruciate ligament and a posterior cruciate ligament; the through hole extends downwards to two sides from the upper end surface of the tibia base body, and a straight hole opposite to the through hole is formed in the middle of the platform pad.

Further, the material of the platform pad is polyethylene.

The following is a more specific example:

referring to fig. 1 to 15, the prosthesis design is an assembly structure as a whole, and mainly comprises four parts, as shown in fig. 1 and 2, a first steel plate 01, a second steel plate 02, a tibia base 03 and a platform pad 04.

The platform pad 04 is designed according to the profiling of the tibia plane, the outer contour of the platform pad is matched with the tibia section, and the platform pad has different models and can be used by children and adults. The upper plane of the platform pad 04 is designed according to the physiological radian of the femoral condyle, so that the stretching and bending abrasion is reduced, and the femoral condyle is protected from being injured less by adopting a polyethylene structural design. Be provided with 5 claw suddenly below platform pad 04, just in time with the first recess phase-match of 5 of shin bone base member 03, claw evenly distributed suddenly reaches the equilibrium of atress, makes platform pad 04 and shin bone base member 03 cooperation more stable, and the design of trompil in the middle of the platform pad 04, with shin bone base member 03 structure phase-match.

The tibia base 03 is designed according to the physiological radian profile of the tibia of a patient, the appearance of the knee joint of the patient cannot be affected after the prosthesis is replaced, and a concave plane and 5 first grooves are designed on the upper end face of the tibia base 03 and matched with the protruding claws of the platform pad 04. Second grooves are formed in two sides of the tibia base body 03, the externally attached matched steel plates are connected through screws, a hole is reserved in the middle of the tibia base body, a rough pitted surface is designed on the tibia prosthesis, friction force is increased, and the tibia base body is used for compressing the collateral ligament.

A through hole is arranged in the middle of the tibial prosthesis and is used for suturing the anterior cruciate ligament and the posterior cruciate ligament. The trabecular bone design in front of the tibial prosthesis is convenient for bone to grow in, the suture hole design is additionally arranged, the patellar ligament is sutured, and the functions of all ligaments are reserved, so that the knee joint function is restored. The design of the conical structure below the tibia basal body 03 can match with the osteotomy segment and the broach to meet the requirements of different osteotomy positions.

In this embodiment, the physiological curvature of the upper surface of the platform pad 04 and the femoral condyle is not limited to the present invention, and the design can be adjusted according to the actual bone condition. The size of the contour of the platform pad 04 is not limited to this embodiment, and can be customized according to the actual tibia condition. Platform pad 04 is not restricted to with 5 cooperation draw-in groove formal designs of shin bone base member 03 the utility model discloses, other messenger both complex structural design all are in the utility model discloses an within the design. The design of the open pore suture ligament of the tibia substrate 03 is not limited to the utility model, and other designs for recovering the function of the knee joint are all in the design of the utility model. The connection structure of the lower part of the tibia substrate 03, no matter the inner cone and the outer cone, is matched with the osteotomy segments or the broach with different diameters.

The trabecular bone position design of shin bone base member 03 is not limited to the utility model discloses, other trabecular bone position designs are all in on the shin bone base member 03 the utility model discloses an within the design.

The upper plane of the platform pad 04 of the prosthesis is designed according to the physiological radian of the femoral condyle, so that the stretching and bending abrasion is reduced, and the femoral condyle is protected from being injured more by adopting a polyethylene material design.

The platform pad 04 of the prosthesis is designed according to the contour profiling of the plane of the tibia, the outer contour of the platform pad is matched with the section of the tibia, and the platform pad has different models, can be large or small, and is suitable for patients of all ages.

The platform pad 04 of the prosthesis is provided with 5 protruding claws below, and the protruding claws are just matched with the 5 first grooves of the tibia base body 03 and are uniformly distributed, so that the stress balance is achieved, and the platform pad 04 is matched with the tibia base body 03 more stably.

The two sides of a tibia base 03 of the prosthesis are provided with second grooves, the steel plates which are externally attached and matched are connected through screws, a hole is reserved in the middle, a rough pitted surface is designed on the tibia prosthesis, friction force is increased, and the tibia prosthesis is used for compressing the collateral ligament. The middle of the tibia prosthesis is provided with a hole for suturing the anterior cruciate ligament and the posterior cruciate ligament. The trabecular bone design in front of the tibial prosthesis is convenient for bone ingrowth, and the suture hole design is added to suture the patellar ligament and keep the functions of all ligaments, thereby recovering the functions of the knee joint.

The lower part of the tibia basal body 03 is assembled, so that different osteotomy positions can be selected by assembling different osteotomy segments or intramedullary nails, and a plurality of surgical schemes can be provided for use. The osteotomy segment and the broach are both provided with finished products, can be directly selected and used according to different osteotomy positions of patients, do not need to be processed again, and realize immediate delivery.

Claims

1. The bionic semi-joint prosthesis for reconstructing the ligament pivot comprises a tibia substrate and is characterized by also comprising a platform pad;

two sides of the tibia base body are respectively provided with a second groove, and a steel plate which is connected through screws is attached to the outside of the second grooves; the inner sides of the steel plate and the groove are provided with rough pitted surfaces for pressing the collateral ligaments; the tibia substrate is provided with a through hole for suturing anterior and posterior cruciate ligaments; the through hole extends downwards to two sides from the upper end surface of the tibia base body, and a straight hole opposite to the through hole is formed in the middle of the platform pad.

2. The biomimetic type semi-articular prosthesis for reconstructing a ligament pivot according to claim 1, wherein there are 5 first grooves and 5 protruding claws corresponding to the first grooves.

3. The biomimetic semi-articular prosthesis for reconstructing a ligament pivot according to claim 1, wherein the material of the platform pad is polyethylene.

4. The biomimetic semi-joint prosthesis for reconstructing a ligament pivot according to claim 1, wherein a through hole for suturing an anterior cruciate ligament and a posterior cruciate ligament is formed at the center of the tibial base body and the platform pad.

5. The biomimetic semi-articular prosthesis for reconstructing a ligament pivot according to claim 1, wherein the lower end of the tibial base body is a tapered structure for matching with an osteotomy segment or a broach.

6. The biomimetic semi-joint prosthesis for reconstructing a ligament pivot according to claim 1, wherein a trabecular bone for facilitating bone growth and suture holes for suturing patellar ligament are further formed on the front surface of the tibial base body.

7. The biomimetic type semi-articular prosthesis for reconstructing a ligament pivot according to claim 1, wherein the boss and the concave plane are fixedly connected by a snap structure.