CN202682099U

CN202682099U - Artificial interphalangeal joint

Info

Publication number: CN202682099U
Application number: CN 201220212194
Authority: CN
Inventors: 陈江海; 翁雨雄
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-05-10
Filing date: 2012-05-10
Publication date: 2013-01-23
Anticipated expiration: 2022-05-10

Abstract

The utility model provides an artificial interphalangeal joint which is suitable for the technical field of artificial prosthesis. The artificial interphalangeal joint comprises a near-end phalanx part and a far-end phalanx part, wherein the top of the far-end phalanx part is provided with a cavity, the top of the near-end phalanx part is embedded in the cavity and can flexibly rotate in the cavity, and the top of the near-end phalanx part is provided with a first screw hole. The artificial interphalangeal joint further comprises a first screw matching the first screw hole. According to the artificial interphalangeal joint disclosed by the utility model, the first screw hole is arranged at the top of the near-end phalanx part and the first screw is screwed down so that the near-end phalanx part can be more stably embedded in the cavity; therefore, a technical problem that a movable connection part of the traditional artificial interphalangeal joint is easy to remove is solved.

Description

A kind of artificial interphalangeal joint

Technical field

This utility model belongs to the artificial prosthesis technical field, relates in particular to a kind of artificial interphalangeal joint.

Background technology

Artificial joint a kind of artificial organ that to be people design for saving the joint that lost function, it belongs to best a kind of of curative effect in artificial organ.In general, its service life can reach more than 20 years.Along with scientific and technological progress; the artificial joint operation has been a kind of very successful and safe operation: it can at once be eliminated arthralgia, recover the normal activity function in joint; make to be subjected to for a long time the ailing people that torment in joint again to obtain new life, particularly be widely used for artificial interphalangeal joint.

Existing artificial interphalangeal joint comprises proximal phalanx section and distal phalanx section, both active links.The root of proximal phalanx section can be fixed in use in the proximal phalanx pulp cavity, then the root with distal phalanx section is fixed in the distal phalanx pulp cavity, confirm firmly after again with both tops chimeric be a joint integral body.But when practical application, find existing artificial interphalangeal joint after long-time the use, the flexible connection position of proximal phalanx section and distal phalanx section easily comes off.

The utility model content

The purpose of this utility model provides a kind of artificial interphalangeal joint, is intended to solve the technical problem that the flexible connection position of the proximal phalanx section of existing artificial interphalangeal joint and distal phalanx section easily comes off.

This utility model is to realize like this, a kind of artificial interphalangeal joint, comprise proximal phalanx section and distal phalanx section, the top of described distal phalanx section has cavity, the top of described proximal phalanx section is entrenched in the described cavity, and can be in described cavity flexible rotating, the top of described proximal phalanx section has the first screw, described artificial interphalangeal joint also comprises with described the first screw to the first screw that cooperates.

Preferably, the root from described cavity bottom to distal phalanx section also has the second screw, and described artificial interphalangeal joint also comprises the second screw that matches with described the second screw.

Preferably, the periphery of described proximal phalanx section and/or distal phalanx section root is coated with the hydroxyapatite dope layer.

Preferably, described proximal phalanx section top lateral symmetry is provided with the rotation round platform, and described cavity is provided with the round platform chute that cooperates with it with the chimeric place that rotates round platform.

Preferably, the periphery of described proximal phalanx section and/or distal phalanx section root is provided with a circle jut at least.

Preferably, described jut is that the cross section is rectangular annulus.

Preferably, described jut is that the cross section is the annulus of right angled triangle.

Preferably, the middle part of described distal phalanx section also is provided with draw-in groove.

Preferably, the both sides root on described distal phalanx section top also is provided with the restriction protrusion that limits its rotational angle.

The beneficial effects of the utility model are: this utility model has the first screw by the top in proximal phalanx section, after the top of proximal phalanx section is fitted to the cavity on distal phalanx section top, the first screw of screwing on and cooperate with it at the first screw again, the top of proximal phalanx section can further be expanded, proximal phalanx section can be more stable be fitted in the described cavity, the service life of so artificial interphalangeal joint can be longer.

Description of drawings

Fig. 1 is the front view of the proximal phalanx section that provides of this utility model embodiment;

Fig. 2 is A-A face cutaway view among Fig. 1 of providing of this utility model embodiment;

Fig. 3 is the schematic diagram of the first screw of providing of this utility model embodiment;

Fig. 4 is the side view of the distal phalanx section that provides of this utility model embodiment;

Fig. 5 is B-B face cutaway view among Fig. 4 of providing of this utility model embodiment;

Fig. 6 is the schematic diagram of the second screw of providing of this utility model embodiment.

The specific embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining this utility model, and be not used in restriction this utility model.

For technical scheme described in the utility model is described, describe below by specific embodiment.

Fig. 1 shows the positive TV structure of proximal phalanx section, Fig. 2 shows the sectional structure of the A-A of proximal phalanx section face, Fig. 4 shows the positive TV structure for distal phalanx section, and Fig. 5 shows the B-B of distal phalanx section face sectional structure, is convenient to illustrate only show the part relevant with this utility model embodiment.

The described artificial interphalangeal joint of the present embodiment comprises proximal phalanx section (seeing figures.1.and.2) and distal phalanx section (with reference to Fig. 4 and Fig. 5), the top of described proximal phalanx section is entrenched in the described cavity 21, and can be in described cavity 21 flexible rotating, the top of described proximal phalanx section has the first screw 11, and described artificial interphalangeal joint also comprises with described the first screw 11 to the first screw that cooperates.In use, the root of proximal phalanx section is implanted and be fixed in the proximal phalanx pulp cavity, then the root of distal phalanx section is implanted and be fixed in the distal phalanx pulp cavity, because in the present embodiment, proximal phalanx section and distal phalanx section make by cross-linked polymer weight northylen material, certain elasticity is arranged, break gently the opening part of cavity 21 into two with one's hands, the top of proximal phalanx section is entrenched in the described cavity 21, the first screw 11 from described proximal phalanx section top is screwed into the first screw (as shown in Figure 3) again, described the first screw of tightening is equivalent to setscrew, slight expansion occurs in the proximal phalanx section top that is screwed into behind the screw, so that the top of proximal phalanx section is embedded in the cavity 21 of distal phalanx section more saturatedly, compared with prior art, chimeric ground, the top of proximal phalanx section is more firm, and proximal phalanx section and distal phalanx section are not easy to come off, and service time is longer.

For so that the root of distal phalanx section is implanted in the medullary cavity more firmly, as preferred embodiment, with reference to Fig. 5, root from described cavity 21 bottoms to distal phalanx section also has the second screw 22 (as shown in Figure 6), after the root of distal phalanx section is implanted to the distal phalanx pulp cavity, in described the second screw 22, be screwed into the second screw 22, the root generation slight expansion of described distal phalanx section, the root of distal phalanx section is implanted in the distal phalanx pulp cavity more firmly like this, is difficult for occuring loose or dislocation.

As preferred embodiment a kind of, periphery at described proximal phalanx section 1 and/or distal phalanx section 2 roots is coated with the hydroxyapatite dope layer, in the present embodiment, both root peripheries all are coated with the hydroxyapatite dope layer, make it behind the implantable bone pulp cavity, can produce bony union with epiphysis, thereby the increase constant intensity prevents the artificial joint slippage.

The top that the below introduces a kind of proximal phalanx section is entrenched in a kind of chimeric mode in the described cavity 21, but obvious protection domain of the present utility model is not limited to this.

With reference to Fig. 1 and Fig. 5, proximal phalanx section top lateral symmetry is provided with rotates round platform 12, described cavity 21 is provided with the round platform chute 23 that cooperates with it with the chimeric place that rotates round platform 12, the present embodiment is embedded in the round platform chute by rotating round platform 12, so that distal phalanx section can rotate take rotation round platform 12 as axle.In addition, because what distal phalanx section and distance end phalanges section adopted is cross-linked polymer weight northylen material, cross-linked polymer weight northylen polishing body is the mutually difficult wearing and tearing of compole at normal temperatures, and this is conducive to use for a long time this type of artificial joint and needn't frequently changes.

In order further the root of distal phalanx section and the root of proximal phalanx section to be implanted in the corresponding medullary cavity more firmly, the periphery of described proximal phalanx section and/or distal phalanx section root is provided with a circle jut at least, as concrete embodiment, described jut can be that the cross section is rectangular annulus, or the cross section is the annulus of right angled triangle.In the present embodiment, as shown in Figure 1, the outer four circle juts 13 that are arranged with of the root of proximal phalanx section, described jut 13 is the annulus of right angled triangle for the cross section, the root of described jut 5 and proximal phalanx section is from having formed in appearance the situation of 4 identical countershaft stacks of round platform, so that proximal phalanx section root ratio is easier to insert proximal phalanx with intracavity, still owing to the screens effect of jut, proximal phalanx section is difficult for being removed like this; As shown in Figure 4, the outer three circle juts 26 that are arranged with of the root of distal phalanx section, described jut 26 is that the cross section is rectangular annulus, equally, when the root of distal phalanx section be implanted to distal phalanx with the chamber after because the screens effect of jut 26, distal phalanx section is difficult for being removed.

Be further used as preferred embodiment, the middle part of described distal phalanx section also is provided with draw-in groove 24.Same so that the distal phalanx section of described draw-in groove 24 be implanted to distal phalanx with the chamber after, should not be gone out.

Further, usually the staff proximal phalangeal joints stretches and can reach 180 degree, flexing can reach 110 degree, for so that between the finger prosthesis that this utility model provides joint fluid can accomplish this slewing area, both sides root on described distal phalanx section top also is provided with the restriction protrusion 25 that limits its rotational angle, when reaching rotational limitation, described restriction protrusion 25 can prop up proximal phalanx section so that distal phalanx section can't be rotated further.

In this utility model embodiment, have the first screw on the top of proximal phalanx section, after the top of proximal phalanx section is fitted to the cavity on distal phalanx section top, the first screw of screwing on and cooperate with it at the first screw again, the top of proximal phalanx section can further be expanded, proximal phalanx section can be more stable be fitted in the described cavity, the service life of so artificial interphalangeal joint can be longer.

The above only is preferred embodiment of the present utility model; not in order to limit this utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. artificial interphalangeal joint, comprise proximal phalanx section and distal phalanx section, the top of described distal phalanx section has cavity (21), the top of described proximal phalanx section is entrenched in the described cavity (21), and can be in described cavity (21) flexible rotating, it is characterized in that, the top of described proximal phalanx section has the first screw (11), and described artificial interphalangeal joint also comprises with described the first screw (11) to the first screw that cooperates.

2. a kind of artificial interphalangeal joint as claimed in claim 1, its feature is being, root from described cavity (21) bottom to distal phalanx section also has the second screw (22), and described artificial interphalangeal joint also comprises the second screw that matches with described the second screw (22).

3. a kind of artificial interphalangeal joint as claimed in claim 2, its feature is being, is coated with the hydroxyapatite dope layer in the periphery of described proximal phalanx section and/or distal phalanx section root.

4. a kind of artificial interphalangeal joint as claimed in claim 3, its feature is being, described proximal phalanx section top lateral symmetry is provided with rotates round platform (12), and described cavity (21) is provided with the round platform chute (23) that cooperates with it with the chimeric place of rotation round platform (12).

5. such as each described a kind of artificial interphalangeal joint of claim 1-4, its feature is being, the periphery of described proximal phalanx section and/or distal phalanx section root is provided with a circle jut at least.

6. a kind of artificial interphalangeal joint as claimed in claim 5, its feature be, described jut is that the cross section is rectangular annulus.

7. a kind of artificial interphalangeal joint as claimed in claim 5 is characterized in that, described jut is that the cross section is the annulus of right angled triangle.

8. a kind of artificial interphalangeal joint as claimed in claim 5 is characterized in that, the middle part of described distal phalanx section also is provided with draw-in groove (24).

9. a kind of artificial interphalangeal joint as claimed in claim 5 is characterized in that, the both sides root on described distal phalanx section top also is provided with the restriction protrusion (25) that limits its rotational angle.