CN209884431U

CN209884431U - Artificial knee joint pad

Info

Publication number: CN209884431U
Application number: CN201920038995.9U
Authority: CN
Inventors: 黄真; 李�远; 单华超; 牛晓辉; 田伟
Original assignee: Beijing Jishuitan Hospital
Current assignee: Beijing Jishuitan Hospital
Priority date: 2019-01-09
Filing date: 2019-01-09
Publication date: 2020-01-03
Anticipated expiration: 2029-01-09

Abstract

The utility model discloses an artificial knee joint liner, the upper surface of artificial knee joint liner be equipped with be used for with the first recess of thighbone outside condyle complex and be used for with the inboard condyle complex second recess of thighbone, first recess is equipped with and runs through the first hole of dodging of artificial knee joint liner, the second recess is equipped with and runs through the hole is dodged to the second of artificial knee joint liner, first dodge the hole with the first hole of dodging all is used for through anterior cruciate ligament. The utility model discloses an artificial knee joint liner can link into more stable structure with the shin bone false body of normal thighbone side and operation, and the excessive activity of restriction knee joint and anterior cruciate ligament provides artificial knee joint false body's stability to improve the quality of patient artificial body postoperative daily life walking.

Description

Artificial knee joint pad

Technical Field

The utility model belongs to the technical field of medical false body, particularly, relate to an artifical knee joint liner.

Background

Prosthetic joint implantation is currently the most mature organ transplant project, and for patients with damaged knee joints, it is often necessary to implant a knee joint spacer between the femur and tibia, which serves to relieve the friction and support properties of the femoral condyle and the tibial plateau.

In carrying out the present invention, the inventors have discovered that, when implanted, the knee joint padding tends to interfere with the connection of the anterior cruciate ligament. In the related technology, the anterior cruciate ligament is connected after bypassing the front side and the back side of the knee joint pad, the unnatural stretching of the anterior cruciate ligament can be caused, the stability of the artificial knee joint prosthesis is influenced, the anterior cruciate ligament is unilateral limited, the range of motion of the artificial knee joint prosthesis is too large, and particularly for children patients, certain influence is caused on the walking quality of daily life after the operation of the children patients.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.

According to the utility model discloses artifical knee joint liner, the upper surface of artifical knee joint liner be equipped with be used for with the first recess of thighbone outside condyle complex and be used for with the second recess of thighbone inboard condyle complex, first recess is equipped with and runs through the first hole of dodging of artifical knee joint liner, the second recess is equipped with and runs through the hole is dodged to the second of artifical knee joint liner, first dodge the hole with first hole of dodging all is used for through anterior cruciate ligament.

According to the utility model discloses artifical knee joint liner can link into more stable structure with the shin bone false body of normal thighbone side and operation, and the excessive activity of restriction knee joint and anterior cruciate ligament provides artifical knee joint false body's stability to improve the quality of patient's artifical false body postoperative daily life walking.

According to the utility model discloses an embodiment's artificial knee joint liner, the middle part of artificial knee joint liner have be used for with the intercondylar ridge complex of femoral condyle convex ridge portion that makes progress, first recess with the second recess is located respectively the both sides of ridge portion, first dodge the hole with the second dodge the hole about ridge symmetrical arrangement.

According to the utility model discloses an artificial knee joint gasket, first dodge the hole to the interval of the central line of ridge is L1, the second dodges the hole to the interval of the central line of ridge is L2, satisfies: l1 is more than or equal to 5mm and less than or equal to 9mm, and L2 is more than or equal to 5mm and less than or equal to 9 mm.

According to the utility model discloses an artificial knee joint liner, the first diameter of dodging the hole is D1, the diameter of hole is dodged to the second is D2, satisfies: d1 is more than or equal to 3mm and less than or equal to 5mm, and D2 is more than or equal to 3mm and less than or equal to 5 mm.

According to the utility model discloses an artificial knee joint liner, first dodge the hole and include a plurality of along the spaced apart a plurality of arranging of fore-and-aft direction, the second dodges the hole and includes along a plurality of spaced apart arrangements of fore-and-aft direction, adjacent two first spacing between the hole of dodging is L3, adjacent two spacing between the hole is dodged to the second is L4, satisfies: l3 is more than or equal to 1mm and less than or equal to 4mm, L3 is more than or equal to D1, L4 is more than or equal to 1mm and less than or equal to 4mm, and L4 is more than or equal to D2.

According to the utility model discloses an artificial knee joint liner, foremost one first dodge the hole to reach the distance at the front side border of artificial knee joint liner is L5, one of rearmost first dodge the hole to reach the distance at the front side border of artificial knee joint liner is L6, satisfies: l5 is more than or equal to 6mm and less than or equal to 8mm, and L6 is more than or equal to 13mm and less than or equal to 17 mm.

According to the utility model discloses an artifical knee joint liner, first dodge the hole with the second dodges the hole and all has circular cross-section.

According to the utility model discloses an artifical knee joint liner, first keep away the hole both ends with first keep away the hole both ends all are equipped with the introducing port of outside expansion.

According to the utility model discloses an artificial knee joint pad, first dodge the hole and include a plurality ofly along the spaced apart arrangement of fore-and-aft direction, the second dodges the hole and includes a plurality ofly along the spaced apart arrangement of fore-and-aft direction.

According to an embodiment of the present invention, the artificial knee joint spacer is a child-type joint spacer

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of an artificial knee joint spacer according to an embodiment of the present invention.

Reference numerals:

an artificial knee joint spacer 100 for a knee joint,

the length of the first groove 11, the second groove 12,

a first relief hole 21 and a second relief hole 22.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

An artificial knee joint spacer 100 according to an embodiment of the present invention is described below with reference to fig. 1.

The utility model discloses artificial knee joint liner 100's upper surface is used for cooperating with the thighbone condyle, and artificial knee joint liner 100's lower surface is used for supporting in tibial plateau, and the shape of artificial knee joint liner 100's upper surface can with the shape adaptation of the lower surface of thighbone condyle, the shape of artificial knee joint liner 100's lower surface can with the shape adaptation of tibial plateau, and the upper surface of artificial knee joint liner 100 and the lower surface of artificial knee joint liner 100 are the smooth surface.

As shown in fig. 1, the upper surface of the artificial knee joint pad 100 is provided with a first groove 11 and a second groove 12, the first groove 11 is used for matching with the lateral condyle of the femoral condyle, the second groove 12 is used for matching with the medial condyle of the femoral condyle, the first groove 11 and the second groove 12 may be spherical concavities, the middle of the artificial knee joint pad 100 is provided with a ridge portion protruding upwards, the ridge portion may be a protruding portion extending back from the front and protruding from both sides to the middle, the ridge portion is used for matching with the intercondylar ridge of the femoral condyle, the intercondylar ridge is located between the lateral condyle of the femur and the medial condyle of the femur, the first groove 11 and the second groove 12 are respectively arranged on both sides of the ridge portion, so that the artificial knee joint pad 100 has a good matching effect with the femoral condyle.

First recess 11 is equipped with the first hole 21 of dodging, and the first hole 21 of dodging runs through artificial knee joint pad 100 along artificial knee joint pad 100's thickness direction (upper and lower direction), and second recess 12 is equipped with the second hole 22 of dodging, and the second hole 22 of dodging runs through artificial knee joint pad 100 along artificial knee joint pad 100's thickness direction (upper and lower direction), and the first hole 21 of dodging all are used for passing through anterior cruciate ligament. The first avoidance hole 21 and the second avoidance hole 22 may be symmetrically arranged about the ridge portion.

It can be understood that, when the artificial knee joint pad 100 is implanted, the tibia end of the anterior cruciate ligament may be fixed on the intercondylar crest of the femur through the first avoiding hole 21 or the second avoiding hole 22, so that the normal femur side and the operated tibia prosthesis may be connected to form a stable structure, and the excessive movement of the knee joint may be limited, and the wall surfaces of the first avoiding hole 21 and the second avoiding hole 22 may limit the mobility of the anterior cruciate ligament in the first avoiding hole 21 or the second avoiding hole 22, and may also limit the excessive movement of the knee joint.

According to the utility model discloses artificial knee joint liner 100 can link into more stable structure with the shin bone false body of normal thighbone side and operation, and the excessive activity of restriction knee joint and anterior cruciate ligament provides artificial knee joint false body's stability to improve the quality of patient artificial body postoperative daily life walking.

As shown in fig. 1, the first avoiding hole 21 has a spacing L1 from the central line of the ridge, and the second avoiding hole 22 has a spacing L2 from the central line of the ridge, which satisfies: l1 is more than or equal to 5mm and less than or equal to 9mm, and L2 is more than or equal to 5mm and less than or equal to 9 mm. For example, L1-7 mm and L2-7 mm.

As shown in fig. 1, the first avoidance hole 21 and the second avoidance hole 22 may each have a circular cross section, and the inner faces of the first avoidance hole 21 and the second avoidance hole 22 are smooth surfaces to prevent the anterior cruciate ligament from being scratched. Both ends of the first avoidance hole 21 and both ends of the first avoidance hole 21 are provided with outward-expanded introduction ports. The introduction port may be tapered to facilitate penetration of the anterior cruciate ligament.

The diameter of the first avoidance hole 21 is D1, the diameter of the second avoidance hole 22 is D2, and the following conditions are met: d1 is more than or equal to 3mm and less than or equal to 5mm, and D2 is more than or equal to 3mm and less than or equal to 5 mm. For example, D1-4 mm and D2-4 mm. Thus, the first avoidance hole 21 and the second avoidance hole 22 do not affect the stretching of the anterior cruciate ligament, and have a sufficient limiting effect on the anterior cruciate ligament.

As shown in fig. 1, the first avoidance hole 21 includes a plurality of holes spaced apart in the front-rear direction, and the second avoidance hole 22 includes a plurality of holes spaced apart in the front-rear direction. It is understood that, in practical use, different first and

second avoidance holes

21 and 22 may be used to adjust the mobility of the prosthesis, that is, the desired avoidance hole may be selected according to the mobility of the prosthesis designed before the operation.

The interval between two adjacent first dodge holes 21 is L3, and the interval between two adjacent second dodge holes 22 is L4, satisfies: l3 is more than or equal to 1mm and less than or equal to 4mm, L3 is more than or equal to D1, L4 is more than or equal to 1mm and less than or equal to 4mm, and L4 is more than or equal to D2. For example, L3-3 mm and L4-3 mm. Thus, the avoidance hole has little influence on the overall strength of the artificial knee joint spacer 100.

The distance from the foremost first avoidance hole 21 to the front side edge of the artificial knee joint pad 100 is L5, and the distance from the rearmost first avoidance hole 21 to the front side edge of the artificial knee joint pad 100 is L6, so that the following requirements are met: l5 is more than or equal to 6mm and less than or equal to 8mm, and L6 is more than or equal to 13mm and less than or equal to 17 mm. For example, L6-7 mm and L6-15 mm.

The artificial knee joint spacer 100 of the disclosed embodiment may be a child-type joint spacer.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides an artificial knee joint gasket, its characterized in that, artificial knee joint gasket's upper surface be equipped with be used for with the first recess of thighbone lateral condyle complex and be used for with the second recess of thighbone medial condyle complex, first recess is equipped with and runs through the first hole of dodging of artificial knee joint gasket, the second recess is equipped with and runs through the hole is dodged to artificial knee joint gasket's second, first dodge the hole with first dodge the hole all be used for through anterior cruciate ligament.

2. The artificial knee joint spacer of claim 1, wherein the middle portion of the artificial knee joint spacer has an upwardly convex ridge for mating with the intercondylar ridge of the femoral condyle, the first and second grooves are respectively provided on both sides of the ridge, and the first and second avoiding holes are symmetrically arranged about the ridge.

3. The artificial knee joint spacer of claim 2, wherein the first avoiding hole has a spacing L1 from the midline of the spine and the second avoiding hole has a spacing L2 from the midline of the spine, satisfying: l1 is more than or equal to 5mm and less than or equal to 9mm, and L2 is more than or equal to 5mm and less than or equal to 9 mm.

4. The artificial knee joint spacer of claim 1, wherein the first relief hole has a diameter of D1 and the second relief hole has a diameter of D2, satisfying: d1 is more than or equal to 3mm and less than or equal to 5mm, and D2 is more than or equal to 3mm and less than or equal to 5 mm.

5. The artificial knee joint spacer according to claim 4, wherein the first avoidance hole includes a plurality of holes spaced apart in the anterior-posterior direction, the second avoidance hole includes a plurality of holes spaced apart in the anterior-posterior direction, a distance between two adjacent first avoidance holes is L3, a distance between two adjacent second avoidance holes is L4, and the following are satisfied: l3 is more than or equal to 1mm and less than or equal to 4mm, L3 is more than or equal to D1, L4 is more than or equal to 1mm and less than or equal to 4mm, and L4 is more than or equal to D2.

6. The artificial knee joint spacer according to claim 5, wherein a distance from a front-most one of the first avoiding holes to a front edge of the artificial knee joint spacer is L5, and a distance from a rear-most one of the first avoiding holes to a front edge of the artificial knee joint spacer is L6, so that: l5 is more than or equal to 6mm and less than or equal to 8mm, and L6 is more than or equal to 13mm and less than or equal to 17 mm.

7. The artificial knee joint spacer of any one of claims 1-6, wherein the first and second relief holes each have a circular cross-section.

8. The artificial knee joint spacer according to any one of claims 1 to 6, wherein both ends of the first avoiding hole and both ends of the first avoiding hole are provided with introduction ports that expand outward.

9. Artificial knee joint padding according to any one of claims 1 to 6, characterised in that it is a childhood-type joint padding.