CN111297520A

CN111297520A - Biological type tibial plateau holds in palm and platform pad

Info

Publication number: CN111297520A
Application number: CN202010208909.1A
Authority: CN
Inventors: 史春宝; 许奎雪; 刘钊; 张朝锋; 张悦
Original assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Current assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2020-06-19
Anticipated expiration: 2040-03-23
Also published as: CN111297520B

Abstract

The invention relates to the technical field of medical instruments, and provides a biological tibial plateau support and a plateau pad. The method comprises the following steps: a tibial plateau pad mounted in the tibial plateau tray cavity; the inner cavity of the tibial plateau support comprises a first cavity and a second cavity, a plurality of first clamping grooves are formed in the side wall of the first cavity, and inner barbs are arranged on the surface of the second cavity; a plurality of second clamping grooves are formed in the side wall of the tibial platform pad, a cylinder is arranged in the center of the lower surface of the tibial platform pad, and an outer barb is arranged on the outer surface of the cylinder; wherein, the cylinder inserts the second cavity, interior barb with outer barb cooperation, a plurality of draw-in groove one and a plurality of draw-in groove two cooperations. The invention has the beneficial effects that: the anti-rotation wings and the anti-rotation screws can prevent the tibial plateau support from rotating in the medullary cavity, and the shaking of the tibial plateau support and the pad can be effectively inhibited through the matching of the clamping grooves; the tibia platform pad and the tibia platform support can be prevented from loosening by arranging the two barbs.

Description

Biological type tibial plateau holds in palm and platform pad

Technical Field

The invention relates to the technical field of medical instruments, in particular to a biological tibial plateau support and a plateau pad.

Background

The tibial plateau on the market at present mostly adopts bone cement to fix and is that a mechanical fixing mode can be used for getting out of bed to walk after operation and short-time recovery, but the fixing mode easily causes aseptic loosening or fatigue fracture along with the time. Even if a small part of biological tibial plateau support products exist, the tibial plateau support and the medullary cavity rotate relatively after being implanted into a human body, so that the tibial plateau support and the medullary cavity cannot be accurately matched, and the operation effect is not good.

The cooperation of the tibial platform pad and the tibial platform support in the prior art mostly adopts thread type cooperation or dovetail groove clamping device and the like, the tibial platform pad is easy to shake in the tibial platform support in these fixing modes, the relative positions of the tibial platform pad and the tibial platform support are changed after the tibial platform pad and the tibial platform support are packed into a human body for a long time, and then the revision surgery is needed, so that the secondary surgery of a patient is caused, and unnecessary troubles are caused.

The assembly process of the tibial platform pad and the tibial platform support in the prior art is too complex, and operation time is prolonged.

Disclosure of Invention

The invention aims to provide a biological tibial plateau support and a plateau pad, which are used for solving the technical problems in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: a biotype tibial plateau tray and plateau pad comprising: a tibial plateau pad mounted in the tibial plateau tray cavity; the inner cavity of the tibial plateau support comprises a first cavity and a second cavity, a plurality of first clamping grooves are formed in the side wall of the first cavity, and inner barbs are arranged on the surface of the second cavity; a plurality of second clamping grooves are formed in the side wall of the tibial platform pad, a cylinder is arranged in the center of the lower surface of the tibial platform pad, and an outer barb is arranged on the outer surface of the cylinder; wherein, the cylinder inserts the second cavity, interior barb with outer barb cooperation, a plurality of draw-in groove one and a plurality of draw-in groove two cooperations.

In an optional embodiment, the second cavity is a blind hole, and the cylinder and the blind hole form a shaft hole fit.

In an alternative embodiment, the inner barbs of the second cavity are press fit with the outer barbs of the cylinder.

In an alternative embodiment, the lower surface of the tibial plateau tray is a trabecular bone structure.

In an optional embodiment, the lower end of the tibial plateau support is provided with a tapered broach, and the broach is inserted into the medullary cavity and is in interference fit with the medullary cavity.

In an alternative embodiment, the lower surface of the tibial plateau tray is provided with a plurality of anti-rotation pegs which are driven into the cut-away end surface of the tibia.

In alternative embodiments, the number of anti-twist pegs is more than four.

In an optional embodiment, the side wall of the tibial plateau support is further provided with an anti-rotation wing, and the anti-rotation wing is in interference fit with the wing-shaped groove formed in the rasp head.

In an alternative embodiment, the number of the anti-rotation wings is two or more.

In an optional embodiment, the number of the first card slots and the second card slots is equal to each other, and the number of the first card slots and the number of the second card slots are more than five.

The invention has the beneficial effects that:

(1) the biological tibial platform support can prevent the biological tibial platform support from rotating in a human body, the tibial platform support and the medullary cavity are matched in a taper interference fit mode, after the prosthesis is installed in the human body, people have certain pressure stress on the tibial platform support when the prosthesis is normally standing, and the medullary needle of the tibial platform support has certain taper, so that the tibial platform support can be matched more tightly under the action of the pressure. The large-diameter section of the broach is under tension and the tail end of the broach is under pressure, so that the effect of preventing stress concentration can be achieved.

(2) The biological tibial plateau support is provided with an anti-rotation wing and an anti-rotation nail, the anti-rotation wing and a file head file form fit mode is a taper interference fit mode, and the anti-rotation nail and the anti-rotation wing prevent the tibial plateau support from rotating in a medullary cavity together. In addition, the bottom surface of the tibial plateau support is provided with a trabecular bone structure which is convenient for bone to grow in and is beneficial to fixing the prosthesis and the bone.

(3) The biological tibial platform pad is matched with the two opposite clamping grooves in the tibial platform support groove through the three clamping grooves on one side and the two clamping grooves on the other side, so that the relative position of the pad is ensured to prevent shaking.

(4) The cylinder at the lower end of the biological tibial plateau pad and the blind hole of the tibial plateau support are both provided with the barbs for preventing dislocation, and the two barbs are matched to prevent dislocation, so that the tibial plateau pad and the tibial plateau support can achieve the effect of looseness prevention.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and 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 to obtain other drawings without creative efforts.

Fig. 1 is a first structural schematic view of a biological tibial plateau tray according to an embodiment of the present invention.

Fig. 2 is a second schematic structural view of a biotype tibial plateau tray provided in an embodiment of the present invention.

Fig. 3 is a third schematic structural view of a biotype tibial plateau tray provided in an embodiment of the present invention.

Fig. 4 is a bottom view of a biologic tibial plateau tray provided by an embodiment of the present invention.

Fig. 5 is a top view of a biologic tibial plateau tray provided by an embodiment of the present invention.

Fig. 6 is a first structural schematic view of a biotype tibial plateau pad according to an embodiment of the present invention.

Fig. 7 is a second structural schematic view of the biologic tibial plateau pad provided by the first embodiment of the present invention.

Wherein, the reference numbers in the figures are: 1. the nail comprises an anti-rotation wing, 2. an anti-rotation nail, 3. a broach, 4. an inner barb, 5. a bone trabecula, 6. a first clamping groove, 7. a second clamping groove, 8. an outer barb, 9. a first cavity, 10. a second cavity and 11. a cylinder.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

Referring to fig. 1-7, the present embodiment is directed to a biologic tibial plateau tray and a plateau pad.

Specifically, the inner cavity of the tibial plateau support comprises a first cavity 9 and a second cavity 10, the second cavity 10 is a blind hole, a cylinder 11 and the blind hole form a shaft hole fit, the side wall of the first cavity 9 is provided with a plurality of first clamping grooves 6, and the surface of the second cavity 10 is provided with an inner barb 4; the lateral wall of the tibial platform pad is provided with a plurality of second clamping grooves 7, the number of the first clamping grooves 6 is equal to that of the second clamping grooves 7, and the number of the first clamping grooves 6 is more than five, and in the preferred embodiment, the number of the second clamping grooves 7 is five.

The cooperation of prior art's tibial plateau pad and tibial plateau support mostly adopts screw thread formula cooperation or dovetail chucking device etc. and above-mentioned fixed mode easily causes tibial plateau pad to rock in the platform holds in the palm, and the human time of packing into will change their relative position for a long time, and then need do the revision operation, lead to patient's secondary operation, cause the unnecessary risk. It should be pointed out that three draw-in groove two 7 and two draw-in grooves two 7 of opposite side of tibial plateau pad cooperate with five draw-in grooves 6 relative in the tibial plateau holds in the palm the recess, guarantees that the relative position of tibial plateau pad is stable, prevents to rock. It is worth mentioning that the tibial plateau pad is made of polyethylene material and has certain plasticity, and the clamping groove two 7 at the tail end of the tibial plateau pad can slide into the clamping groove one 6 of the biological tibial plateau support by applying pressure.

In the embodiment, the center of the lower surface of the tibial platform pad is provided with a cylinder 11, and the outer surface of the cylinder 11 is provided with an outer barb 8; wherein, the cylinder 11 is inserted into the second cavity 10, and the inner barb 4 is matched with the outer barb 8. It is worth mentioning that, because the tibial platform pad has certain elasticity, the fit is realized through impressing also to interior barb 4 and outer barb 8, and above-mentioned two barbs match and can prevent the dislocation, make tibial platform pad and tibial platform hold in the palm not hard up. The assembly of the tibial platform pad and the tibial platform support in the prior art is usually too complex in threaded assembly, and operation time is prolonged.

In this embodiment, the lower surface of the tibial plateau support is a trabecular bone 5 structure, which facilitates bone ingrowth and fixation of the prosthesis and the bone. The lower surface that the tibial plateau held in the palm is equipped with a plurality of antitorque nail 2 that revolves, and antitorque nail 2 squeezes into and plays anti-rotation effect in the remaining terminal surface of shin bone cut, and the quantity of antitorque nail 2 is more than four, and preferably, the quantity of antitorque nail 2 is four, evenly distributed in the lower surface that the tibial plateau held in the palm. Still be equipped with anti rotatory wing 1 on the lateral wall of tibial plateau support, anti rotatory wing 1 and the wing type groove interference fit that the file head was beaten, the quantity of anti rotatory wing 1 is more than two, preferably, the quantity of anti rotatory wing is two, anti rotatory wing 1 and the form fit mode that files out with the file head are tapering interference fit. The four anti-rotation pegs 2 and the two anti-rotation wings 1 together prevent the tibial bio-platform from rotating in the medullary cavity.

In addition, the lower end of the tibial plateau support is provided with a tapered broach 3, the broach 3 is inserted into the medullary cavity and is in interference fit with the medullary cavity, preferably, the distal end of the broach 3 has a taper of 1.4-1.9 degrees, and the middle section of the broach 3 has a taper of 12-13 degrees, so that the biological tibial plateau support can be prevented from rotating in a human body. The matching mode of the broach 3 and the medullary cavity is taper interference fit, after the prosthesis is installed in a human body, a certain compressive stress is applied to the tibial plateau support when people stand normally, the broach 3 of the tibial plateau support has a certain taper, the fit can be more compact under the action of pressure, the large-diameter section of the broach 3 is under tension and the tail end of the broach 3 is under pressure, and the stress concentration can be prevented.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A biotype tibial plateau tray and plateau pad comprising: a tibial plateau pad mounted in the tibial plateau tray cavity;

the method is characterized in that: the inner cavity of the tibial plateau support comprises a first cavity and a second cavity, a plurality of first clamping grooves are formed in the side wall of the first cavity, and inner barbs are arranged on the surface of the second cavity; a plurality of second clamping grooves are formed in the side wall of the tibial platform pad, a cylinder is arranged in the center of the lower surface of the tibial platform pad, and an outer barb is arranged on the outer surface of the cylinder; wherein, the cylinder inserts the second cavity, interior barb with outer barb cooperation, a plurality of draw-in groove one and a plurality of draw-in groove two cooperations.

2. The biologic tibial plateau tray and plateau pad of claim 1 wherein said second cavity is a blind hole and said cylindrical body forms an axial hole for mating with said blind hole.

3. The biologic tibial plateau tray and plateau pad of claim 2 wherein said inner barb of said second cavity is press fit into said outer barb of said cylinder.

4. The biologic tibial plateau tray and plateau pad of claim 3 wherein the inferior surface of said tibial plateau tray is a trabecular bone structure.

5. The biologic tibial plateau tray and plateau pad of claim 1 wherein said tibial plateau tray has a tapered broach at a lower end thereof, said broach being inserted into the intramedullary canal in interference fit therewith.

6. The biologic tibial plateau tray and plateau pad of claim 1 wherein said tibial plateau tray has a lower surface provided with a plurality of anti-torque pegs that are driven into the cut-away end surface of the tibia.

7. The biologic tibial plateau tray and plateau pad of claim 6 wherein the number of said anti-twist pegs is greater than 4.

8. The biologic tibial plateau tray and plateau pad of claim 1, wherein said tibial plateau tray further comprises anti-rotation wings on its side walls, said anti-rotation wings being in interference fit with the wing-shaped grooves formed on the rasp head.

9. The biologic tibial plateau tray and plateau pad of claim 8 wherein the number of said anti-rotation wings is two or more.

10. The biologic tibial plateau tray and plateau pad of claim 1 wherein said first and second slots are equal in number and are each five or more.