CN210727851U

CN210727851U - Orthopedic implant screw

Info

Publication number: CN210727851U
Application number: CN201822132698.9U
Authority: CN
Inventors: 王彩梅
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2018-12-18
Filing date: 2018-12-18
Publication date: 2020-06-12
Anticipated expiration: 2028-12-18

Abstract

The utility model provides an orthopedic implant screw, which comprises a fixed seat, a seat body, a deformation limiting part and a prick part, wherein the seat body is provided with a limiting cavity, a top avoidance port and a bottom avoidance port, the deformation limiting part is arranged on the inner wall surface of the seat body, and the prick part is arranged on the outer wall surface of the seat body; the screw body, screw body detachably installs on the fixing base, and the screw body is used for boring into the skeleton with rotatory mode, and the partly spacing at spacing intracavity of screw body, another part of screw body dodges the mouth by the bottom and bores into the skeleton after wearing out, and the internal face that presses the seat body is supported to the screw body that is located spacing intracavity to make the awl portion pierce the skeleton, and prevent that the screw body from withdrawing from the skeleton. The utility model provides a bone nail among the prior art be in under the complicated stress environment for a long time, easily take place not hard up, or screw out in the skeleton, be unfavorable for the quick of skeleton, stably grow the healing, cause the secondary damage in affected part moreover, seriously influenced patient's quality of life's problem.

Description

Orthopedic implant screw

Technical Field

The utility model relates to the technical field of medical equipment, particularly, relate to a modular self-stabilization's orthopedics implants screw's structural design, this orthopedics implants screw has skeleton integration and self-locking function, prevents effectively that orthopedics implants screw from withdrawing from the skeleton.

Background

As an orthopedic implant commonly used for fixation, a bone nail is usually used for fixation of internal fracture or dislocation, and when the bone nail is used, the bone nail is directly screwed into two different bone blocks or the implant such as a fixed bone plate and the like to realize fixation of bones and promote healing of an affected part.

However, in clinical practice, the screw implanted into the bone is easily loosened and even gradually unscrewed from the bone under a complex stress environment for a long time, so that the bone is not easily and stably grown and healed, secondary injury to the affected part is likely to be caused, and the life quality of a patient is seriously affected.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides an orthopedic implantation screw to solve the bone nail that is used for implanting the skeleton among the prior art and be in under the environment of complicated stress for a long time, take place very easily not hard up, from the gradual fine motion back-out in the skeleton even, thereby not only be unfavorable for the quick of skeleton, grow steadily and heal, can cause the secondary damage in affected part moreover very likely, influenced patient's quality of life's problem seriously.

In order to achieve the above object, the present invention provides an orthopedic implant screw for implanting a bone, comprising: the fixing seat comprises a seat body, a deformation limiting part and a prick part, wherein the seat body is provided with a limiting cavity, a top avoidance port and a bottom avoidance port which are communicated with the limiting cavity; the screw body, the screw body detachably installs on the fixing base, and the screw body is used for boring into the skeleton with rotatory mode, and the partly internal face and the spacing portion of deformation of the body of the screw are spacing at spacing intracavity, and the another part of the screw body is dodged the mouth by the bottom and is worn out the back and bore into the skeleton inside, and the screw body that is located spacing intracavity supports the internal face of pressing the seat body to make the awl thorn portion pierce the skeleton, and prevent that the screw body from withdrawing from the skeleton.

Further, the screw body is including the nail point, the nail body and the head of a nail of connecting in order, wherein, has helicitic texture on nail point and/or the nail body, and nail point and nail body are bored into the skeleton through helicitic texture inside, and the head of a nail is spacing in spacing intracavity by the internal face and the spacing portion of deformation of seat body, and the head of a nail is used for propping against the internal face of seat body.

Further, partial surface of the inner wall surface of the seat body and partial surface of the outer surface of the nail cap are curved surfaces which are in adaptive fit.

Further, the surface part of the inner wall surface of the seat body and the outer surface of the nail cap which are in adaptive fit is a part surface of a spherical surface.

Further, the stabbing portion extends in the axial direction of the seat body; or the stabbing portion inclines to the opposite side of the direction in which the screw thread structure rotates to enter the bone.

Further, the awl thorn portion is a plurality of, and a plurality of awl thorn portions set up around the circumference interval of seat body.

Further, the spacing portion of deformation is for having the elasticity buckle of deformation function, and elasticity buckle is a plurality ofly, and a plurality of elasticity buckles keep away the circumference interval setting of mouth around the top.

Further, the orthopedic implant screw further comprises a liner, the liner is arranged on the outer wall surface of the fixing seat, the stabbing portion penetrates through the liner, and a plurality of micro-pore structures are arranged inside the liner.

Further, liner and fixing base are through the mode integrated into one piece that 3D printed.

Furthermore, the upper surface of the nail cap is provided with a counter bore and a clamping groove for screwing operation, and the clamping groove is connected with the deformation limiting part in a matched and clamped mode.

By applying the technical proposal of the utility model, because the screw body is detachably arranged on the fixing seat, when the screw is implanted in orthopaedics, the screw body sequentially passes through the top of the seat body to avoid the opening, the limit cavity and the bottom to avoid the opening, and is drilled into the skeleton in a way of screwing the screw body, when the screw body is drilled into the skeleton with a certain depth, the conical piercing part of the fixing seat is contacted with the surface of the skeleton, at the moment, the screw body is continuously screwed, one end of the screw body, which is far away from the skeleton, can press the deformation limit part of the fixing seat, the deformation limit part deforms until one end of the screw body, which is far away from the skeleton, completely crosses the deformation limit part, the deformation limit part restores the original shape, stops the end face of one end of the screw body, which is far away from the skeleton, then, the screw body is continuously screwed, the inner wall surface of the seat body is pressed by the screw body in the limit cavity, therefore, a limit relation is formed between the fixed seat and the skeleton, and the fixed seat also has a limit effect on the screw body so as to prevent the screw body from withdrawing from the skeleton; the stability of the screw body implanted into the skeleton is ensured, the quick and stable growth and healing of the skeleton are facilitated, the affected part is prevented from being secondarily injured, and the life quality of a patient is reliably improved.

Drawings

The accompanying drawings, which form a part of the present application, 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 invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic view of the assembly structure of an orthopaedic implant screw according to an alternative embodiment of the present invention;

FIG. 2 shows a front schematic view of the orthopedic implant screw of FIG. 1;

FIG. 3 shows a cross-sectional schematic view of the orthopedic implant screw of FIG. 2;

FIG. 4 is a schematic cross-sectional view showing the overall structure of a holder and a spacer for the orthopedic implant screw of FIG. 1;

FIG. 5 shows a schematic view of the fixing base of the orthopedic implant screw of FIG. 1;

FIG. 6 shows a front view of the anchor block of FIG. 5;

FIG. 7 shows a cross-sectional schematic view of the anchor block of FIG. 6;

fig. 8 shows a schematic cross-sectional view of the liner of the orthopaedic implant screw of fig. 1.

Fig. 9 shows a schematic structural view of a screw body of the orthopedic implant screw of fig. 1.

Wherein the figures include the following reference numerals:

10. a fixed seat; 11. a seat body; 111. a limiting cavity; 112. a top avoidance port; 113. a bottom dodge port; 12. a deformation limiting part; 13. a stabbing part; 20. a screw body; 21. nailing tips; 22. a nail body; 23. a nail cap; 231. screwing the operation counter bore; 232. a card slot; 24. a thread structure; 30. a liner; 31. a microporous structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In order to solve the bone nail for implanting skeleton among the prior art under the environment of complex stress for a long time, take place very easily not hard up, gradually fine motion screw-out even in the follow skeleton to not only be unfavorable for quick, the steadily union of growing of skeleton, can cause the secondary injury in affected part moreover very likely, influenced patient's quality of life's problem seriously, the utility model provides an orthopedic implant screw.

As shown in fig. 1 to 9, the orthopedic implant screw is used for implanting bone, and includes a fixing seat 10 and a screw body 20, the fixing seat 10 includes a seat body 11, a deformation limiting portion 12 and a burr portion 13, wherein the seat body 11 has a limiting cavity 111 and a top avoiding port 112 and a bottom avoiding port 113 which are communicated with the limiting cavity 111, the deformation limiting portion 12 is disposed on an inner wall surface of the seat body 11 and protrudes toward the limiting cavity 111, the deformation limiting portion 12 is located at the top avoiding port 112, and the burr portion 13 is protrudingly disposed on an outer wall surface of the seat body 11; the screw body 20 is detachably mounted on the fixing seat 10, the screw body 20 is used for drilling into a bone in a rotating mode, one part of the screw body 20 is limited in the limiting cavity 111 by the inner wall surface of the seat body 11 and the deformation limiting part 12, the other part of the screw body 20 penetrates out of the opening 113 through the bottom and then drills into the bone, and the screw body 20 located in the limiting cavity 111 abuts against the inner wall surface of the seat body 11, so that the prick part 13 pierces into the bone, and the screw body 20 is prevented from exiting out of the bone.

Since the screw body 20 is detachably mounted on the fixing seat 10, when the orthopedic implant screw is used, the screw body 20 sequentially penetrates through the top avoidance port 112, the limiting cavity 111 and the bottom avoidance port 113 of the seat body 11 and is drilled into a bone in a manner of screwing the screw body 20, when the screw body 20 is drilled into the bone to a certain depth, the tapered portion 13 of the fixing seat 10 contacts with the surface of the bone, the screw body 20 is continuously screwed at this time, while the screw body 20 is continuously drilled into the bone, one end away from the bone abuts against the deformation limiting portion 12 of the fixing seat 10, the deformation limiting portion 12 deforms until one end of the screw body 20 away from the bone completely passes over the deformation limiting portion 12, the deformation limiting portion 12 recovers the original shape to stop the end face of the end of the screw body 20 away from the bone, then the screw body 20 is continuously screwed, and the screw body 20 located in the limiting cavity 111 abuts against the inner wall surface of the seat body 11, so that the stabbing part 13 pierces the bone, and thus, a limit relation is formed between the fixing seat 10 and the bone, and meanwhile, the fixing seat 10 also has a limit function on the screw body 20, thereby preventing the screw body 20 from withdrawing from the bone; the stability of the screw body 20 implanted into the skeleton is ensured, the quick and stable growth and healing of the skeleton are facilitated, the affected part is prevented from being secondarily injured, and the life quality of a patient is reliably improved.

As shown in fig. 1, 2, 3 and 9, the screw body 20 includes a nail tip 21, a nail body 22 and a nail cap 23, which are connected in sequence, wherein the nail tip 21 and/or the nail body 22 has a thread structure 24, the nail tip 21 and the nail body 22 are drilled into the bone through the thread structure 24, the nail cap 23 is limited in the limiting cavity 111 by the inner wall surface of the seat body 11 and the deformation limiting part 12, and the nail cap 23 is used for pressing against the inner wall surface of the seat body 11. When the nut 23 supports against the deformation limiting part 12 of the fixing seat 10, the deformation limiting part 12 deforms until the nut 23 completely crosses the deformation limiting part 12 and enters the limiting cavity 111, the partial surface of the nut 23 is abutted against the inner wall surface of the seat body 11, and the deformation limiting part 12 is in contact with the upper surface of the nut 23 so as to play a role in axially limiting the nut 20.

It should be noted that the deformation limiting portion 12 is a plurality of elastic buckles having a deformation function, and the plurality of elastic buckles are arranged around the circumferential direction of the top avoidance opening 112 at intervals. Thus, the stability of the position restriction of the nut 23 by the strain stopper 12 can be improved.

As shown in fig. 9, the upper surface of the nail cap 23 is provided with a screwing operation counter bore 231 and a clamping groove 232, and the clamping groove 232 is fittingly clamped with the deformation limiting part 12. Screwing operation counter bore 231's setting is convenient for twist the screw body 20, and draw-in groove 232 corresponds the cooperation with the spacing portion 12 of deformation, crosses the spacing portion 12 of deformation and gets into spacing intracavity 111 back when the nail cap 23, and the spacing portion 12 of deformation is to adaptability ground with draw-in groove 232 joint to further play the effect of splines limit to screw body 20.

In order to improve the assembling stability of the screw body 20 and the seat body 11 and ensure that the seat body 11 provides sufficient supporting force for the screw body 20, optionally, part of the surface of the inner wall surface of the seat body 11 and part of the surface of the outer surface of the nut 23 are curved surfaces which are fittingly attached.

In the present embodiment, as shown in fig. 3, 4, 5 and 7, the surface portion where the inner wall surface of the seat body 11 and the outer surface of the nut 23 are fittingly fitted is a partial surface of a spherical surface. In this way, it is possible to ensure a larger contact area between the inner wall surface of the seat body 11 and the outer surface of the nut 23, thereby making the seat body 11 more effectively support and restrain the screw body 20.

Optionally, in order to facilitate the stabbing portion 13 and the seat body 11 to be conveniently integrally formed, the stabbing portion 13 extends along the axial direction of the seat body 11.

Of course, in order to ensure that the seat body 11 does not become loose from the bone due to the rotation of the screw body 20, the rotation stop function of the seat body 11 on the screw body 20 may be raised, and the stabbing portion 13 may be inclined to the opposite side of the direction in which the rotation of the screw structure 24 enters the bone.

In order to improve the stability of the connection between the seat body 11 and the bone, as shown in fig. 2, 5, and 6, the plurality of stabs 13 are provided, and the plurality of stabs 13 are provided at intervals around the circumferential direction of the seat body 11.

As shown in fig. 3, 4 and 8, the orthopedic implant screw further includes a pad 30, the pad 30 is disposed on the outer wall surface of the fixing base 10, the stabbing portion 13 penetrates through the pad 30, and the pad 30 has a plurality of micro-porous structures 31 inside. The plurality of micro-porous structures 31 facilitate bone ingrowth, thereby ensuring perfect fusion of the orthopaedic implant screw with the bone.

In order to facilitate the overall structural stability of the gasket 30 and the fixing base 10, the gasket 30 and the fixing base 10 are integrally formed by means of 3D printing.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An orthopedic implant screw for implanting into a bone, comprising:

the fixing seat (10) comprises a seat body (11), a deformation limiting part (12) and a prick part (13), wherein the seat body (11) is provided with a limiting cavity (111) and a top avoidance port (112) and a bottom avoidance port (113) which are communicated with the limiting cavity (111), the deformation limiting part (12) is arranged on the inner wall surface of the seat body (11) and protrudes towards the inside of the limiting cavity (111), the deformation limiting part (12) is positioned at the top avoidance port (112), and the prick part (13) is convexly arranged on the outer wall surface of the seat body (11);

the utility model provides a bone fracture plate, including the fixing base (10), the screw body (20) detachably installs on fixing base (10), the screw body (20) are used for drilling into with rotatory mode the skeleton, just some quilt of screw body (20) the internal face of seat body (11) with the spacing portion of deformation (12) is spacing in spacing chamber (111), another part of screw body (20) by the bottom dodges mouthful (113) and drills into after wearing out inside the skeleton, and is located in spacing chamber (111) the screw body (20) support and press the internal face of seat body (11), so that awl portion (13) pierce the skeleton, and prevent that the screw body (20) withdraw from the skeleton.

2. The orthopedic implant screw according to claim 1, characterized in that the screw body (20) comprises a screw tip (21), a screw body (22) and a screw cap (23) which are connected in sequence, wherein the screw tip (21) and/or the screw body (22) is provided with a thread structure (24), the screw tip (21) and the screw body (22) are drilled into the bone through the thread structure (24), the screw cap (23) is limited in the limiting cavity (111) by the inner wall surface of the seat body (11) and the deformation limiting part (12), and the screw cap (23) is used for pressing against the inner wall surface of the seat body (11).

3. The orthopaedic implant screw according to claim 2, wherein part of the surface of the inner wall surface of the seat body (11) and part of the surface of the outer surface of the nut (23) are curved surfaces adapted to fit.

4. The orthopaedic implant screw according to claim 2, wherein the surface portion to which the inner wall surface of the seat body (11) and the outer surface of the nut (23) are fittingly conformed is a part surface of a sphere.

5. The orthopedic implant screw of claim 2,

the stabbing portion (13) extends in the axial direction of the seat body (11); or

The stabbing portion (13) is inclined to the side opposite to the direction in which the screw structure (24) is rotated to enter the bone.

6. The orthopaedic implant screw according to claim 5, wherein the bur portion (13) is in plurality, the plurality of bur portions (13) being arranged at intervals around the circumference of the seat body (11).

7. The orthopedic implant screw of claim 1, characterized in that the deformation limiting portion (12) is a plurality of elastic buckles having a deformation function, the plurality of elastic buckles being disposed around the circumferential interval of the top avoidance opening (112).

8. The orthopaedic implant screw according to claim 1, further comprising a spacer (30), the spacer (30) being provided on the outer wall surface of the holder (10) and the countersink (13) passing through the spacer (30), the spacer (30) having a plurality of micro-porous structures (31) inside.

9. The orthopaedic implant screw according to claim 8, wherein the spacer (30) and the fixed seat (10) are integrally formed by means of 3D printing.

10. The orthopedic implant screw according to claim 2, characterized in that the upper surface of the screw cap (23) is provided with a screwing operation counter bore (231) and a clamping groove (232), and the clamping groove (232) is fittingly clamped with the deformation limiting part (12).