CN211156176U - Adjustment device for adjusting the spacing between adjacent bones - Google Patents

Abstract

The utility model belongs to the field of medical equipment, a an adjusting device for adjusting interval between adjacent bone is disclosed. The adjusting device comprises at least one adjusting screw, the adjusting screw comprises a screw body, the screw body comprises a first threaded section formed at the upper part of the screw body and a second threaded section formed at the lower part of the screw body, and an adjusting part is formed with an internal thread matched with the first threaded section and an external thread formed on the outer surface of the adjusting part, wherein the thread pitch of the internal thread is different from that of the external thread, and a first operating hole for screwing the screw body is formed at the top end of the first threaded section. The utility model discloses an adjusting device for adjusting interval between adjacent bone can adjust the interval between the adjacent bone of human body to realize the two stable fixed.

Description

Adjustment device for adjusting the spacing between adjacent bones

Technical Field

The utility model belongs to the field of medical equipment, concretely relates to an adjusting device for adjusting interval between adjacent bone.

Background

In orthopedic surgery, in order to ensure that adjacent bones can jointly perform a more stable function, it is important to ensure the spacing between adjacent bones and stable fixation. Taking the sacroiliac joint disease as an example, the difficulty of the surgical treatment lies in how to adjust the optimal distance between the human sacrum and the human ilium and effectively fix the human sacrum and the human ilium after the adjustment so as to ensure the postoperative function of the sacroiliac joint.

Currently, in the surgical treatment of sacroiliac joint diseases, the following two methods are mainly adopted for connecting the human sacrum and the human ilium: one is to open the wound with the back and place a plurality of screws on the base for connecting the sacroiliac joints to secure the sacrum and the ilium of the body. The treatment mode needs a large incision operation wound which is formed on the back, has weak pertinence to diseases of sacroiliac joints, is slow to recover after operation, and can only fix the sacrum and the ilium of a human body but can not adjust the distance between the sacrum and the ilium of the human body; the other is that two or three fixing and connecting parts with triangular cross sections are respectively nailed into the sacrum and the ilium of the human body to fixedly connect the sacrum and the ilium of the human body, compared with the first mode, although the mode has strong pertinence, small operation wound and fast postoperative recovery, the sacrum and the ilium of the human body can be fixed, but the distance between the sacrum and the ilium of the human body can not be adjusted, and the fusion performance and the stability of the fixing and connecting parts and the sclerotin of the human body are poor, so that the postoperative recovery of a patient is slow.

In view of the shortcomings of the prior art, those skilled in the art will appreciate that an adjusting device for adjusting the spacing between adjacent bones of the human body is capable of adjusting the spacing between the adjacent bones and achieving stable fixation between the adjacent bones.

SUMMERY OF THE UTILITY MODEL

In order to realize the interval between the human adjacent bone of adjustment, the utility model provides an adjusting device for adjusting the interval between the adjacent bone.

According to the utility model discloses an interval between human sacrum and human ilium can be adjusted, and realize the two stable fixed, at least one adjusting screw, adjusting screw includes the screw body, the screw body is including forming the first screw section of its upper portion and forming the second screw section in its lower part, and the adjusting part, the adjusting part is formed with first screw section complex internal thread and the external screw thread that forms on the surface of adjusting part, wherein, the internal thread pitch is different with the pitch of external screw thread, the top of first screw section is formed with the first handle hole that is used for revolving the screw body soon.

Preferably, the first operating hole is hexagonal in shape.

Further, the screw body further includes an axial through hole communicating with the first operation hole.

Further, the screw body still includes the interlude of connecting first screw thread section and second screw thread section, is formed with at least one trompil with the axial through-hole intercommunication on interlude and/or the second screw thread section.

Preferably, the position of the opening is arranged at the thread end and/or thread middle position of the first thread section, the second thread section.

Further, the bottom end of the second threaded section is formed with a first notch and/or the top end of the adjustment member is formed with a second notch.

Further, the adjustment member has an outer diameter dimension equal to an outer diameter dimension of the second threaded section.

Preferably, when the adjacent bones are sacrum and ilium, the outer diameter of the adjusting screw ranges from 10 to 20mm, and is further preferably 12.5 mm; the length ranges are: 30mm to 100mm, and more preferably 60 mm.

Further, the adjusting means for adjusting the interval between the adjacent bones further comprises at least one set screw including a screw section and a nut section detachably coupled to an outer circumferential wall of a tip end of the screw section, the tip end of the screw section being formed with a second operation hole for screwing the screw section.

Preferably, the second operating hole is hexagonal in shape.

Furthermore, at least one tensioning groove communicated with the outer edge of the nut section is formed at the top end of the nut section.

Preferably, the bottom surface of the nail head section is in a circular truncated cone shape with a reduced diameter.

Further, a bulge is formed on the bottom surface of the nail head section.

Further, the screw section includes the nail body, and nut section detachably connects at the top of nail body, is formed with outside screw thread on the periphery wall of the one end of keeping away from the nut section of nail body.

Preferably, the outer diameter of the set screw is in the range of 6-12mm, more preferably 7 mm; the length ranges are: 30mm to 100mm, preferably 60 mm.

Further, the adjustment means for adjusting the spacing between adjacent bones comprises two adjustment screws and one set screw.

Preferably, the adjusting screw and the fixing screw are made of titanium alloy material, and the outer surface is covered with a pure titanium coating.

Compared with the prior art, the utility model discloses an adjusting device for adjusting interval between adjacent bone has following advantage:

1) the screw body is in threaded fit connection with the adjusting part, and the thread pitches of the inner threads and the outer threads of the adjusting part are set to be different, so that the human bone connected with the adjusting screw and the adjacent human bone connected with the adjusting part can move relatively, and the distance between the adjacent bones can be adjusted.

2) Through set up axial through hole on adjusting screw's the screw body for adjusting screw is last to have the space that holds bone grafting material, and then has improved the amalgamation effect of screw and human bone.

3) Through the second screw thread section of the screw body and the communicated holes of the middle section of the screw body, the bone grafting material in the axial through hole forms a path which can be fused with human bones in multiple directions, the fusion effect of the screw body and the human bones is greatly enhanced, the stability of the fixation of the screw body and the human bones is improved, and the postoperative recovery time is further shortened.

4) Make the adjusting device who is used for adjusting the interval between the adjacent bone through setting up set screw utilize adjusting screw to realize adjusting the effect back of adjacent bone, can also realize better fixed action, avoid the interval between the adjacent bone to fix the emergence of unstable phenomenon after adjusting.

5) The bottom surface of the nail cap section is provided with the bulge, so that the relative rotation between the nail cap section and the human bone after the fixation is avoided, and the fixation between the nail cap section and the human bone is more stable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic view of the installation of an adjustment device for adjusting the spacing between adjacent bones according to the present invention;

FIG. 2 is a schematic view of the set screw of FIG. 1;

FIG. 3 is a bottom view of the adjustment screw of FIG. 2;

FIG. 4 is a perspective view of the screw body shown in FIG. 2;

FIG. 5 is a front cross-sectional view of the screw body shown in FIG. 4;

FIG. 6 is a bottom view of the screw body shown in FIG. 4;

FIG. 7 is a schematic view of the adjustment assembly shown in FIG. 2;

FIG. 8 is a perspective view of the set screw of FIG. 1;

FIG. 9 is a left side view of the set screw of FIG. 8;

FIG. 10 is a front view of the screw segment shown in FIG. 8;

FIG. 11 is a cross-sectional view of the screw segment shown in FIG. 10;

fig. 12 is a left side view of the screw segment shown in fig. 10.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

Fig. 1 shows a schematic mounting of an adjustment device 100 for adjusting the spacing between adjacent bones according to the present invention. Referring to fig. 2, an adjusting device 100 for adjusting a space between adjacent bones of the present invention includes at least one adjusting screw 1, the adjusting screw 1 including a screw body 11, the screw body 11 (shown in fig. 4) including a first threaded section 111 formed at an upper portion thereof and a second threaded section 112 formed at a lower portion thereof, and an adjusting member 12 (shown in fig. 7), the adjusting member 12 being formed with an internal thread 122 engaged with the first threaded section 111 and an external thread 123 formed on an outer surface of the adjusting member 12. Wherein, the pitch of the internal thread 122 is different from that of the external thread 123, and a first operation hole 1111 for screwing the screw body 11 is formed at the top end of the first thread section 111.

The utility model discloses an adjusting device 100 for adjusting interval between adjacent bone is when using, adjusting screw 1 is nailed in the adjacent bone of human body, specifically, as shown in fig. 1, this embodiment uses sacrum and ilium as an example, at first punch in the direction of connection of sacrum and ilium in order to form the bone grafting hole, the bone grafting hole passes through sacrum and ilium simultaneously, then in screwing adjusting screw 1 into the hole, the lower part of the screw body 11 of adjusting screw 1 is located human sacrum and with human sacrum threaded connection this moment, and simultaneously, adjusting member 12 with the first screw section 111 screw thread fit on screw body 11 upper portion is located human ilium, the external screw thread 123 that forms on the surface of adjusting member 12 forms threaded connection with human ilium. The thread pitch of the internal thread 122 of the adjusting component 12 is different from that of the external thread 123, when the distance between the human sacrum and the human ilium needs to be adjusted, a screwdriver and other operation tools can be adopted to be matched with the operation hole 1111 on the screw body 11, the screw body 1 can be driven to move axially relative to the adjusting component 12 by clockwise or anticlockwise rotating the operation tools, so that the human sacrum in threaded connection with the lower part of the screw body 11 moves relatively to the human ilium in threaded connection with the external thread 123 of the adjusting component 12, and the adjustment of the distance between the human sacrum and the human ilium is realized.

According to the adjusting device 100 for adjusting the interval between adjacent bones of the present invention, as shown in fig. 4 and 5, the screw body 11 may further include an axial through hole 114 communicating with the first operation hole 1111. Through this setting, operating personnel can be used for filling into axial through-hole 114 with autologous bone or artificial bone that human sacrum or ilium fuse through first handle hole 1111 for be located the autologous bone or the artificial bone in axial through-hole 114 and first handle hole 1111 and be favorable to fusing fast with human sacrum or ilium, thereby help improving the fixed stability of screw body 11 with human skeleton, with shorten postoperative recovery time. Preferably, as shown in fig. 3, the first manipulation hole 1111 may have a hexagonal shape. The hexagonal shape enables the first operation hole 1111 to be matched with screwdrivers of various shapes, thereby improving the versatility and convenience of installation and adjustment of the screw body 11.

According to the adjusting device 100 for adjusting the distance between adjacent bones of the present invention, the screw body 11 may further include an intermediate section 115 connecting the first thread section 111 and the second thread section 112, and at least one opening 116 communicating with the axial through hole 114 may be formed on the intermediate section 115 and/or the second thread section 112. Through this setting up on the one hand can make autologous bone or artificial bone fill in axial through hole 114 can get into the space between screw body 11 and the bone grafting hole through a plurality of trompils 116 to the bone grafting material in axial through hole 114 forms the passageway that can diversely fuse with human bone, on the other hand can make the sclerotin that produces when punching fill in axial through hole 114 through trompil 116, such setting has strengthened the fusion effect of screw body 11 with human bone widely, the fixed stability of screw body 11 with human bone has been improved, and then the postoperative recovery time has been shortened.

In a preferred embodiment as shown in fig. 2, the position of the opening 116 can be arranged at an end of the middle section 115 close to the first thread section 111, which can prevent bone debris generated during screwing of the set screw 1 into the bone-implanting hole from accumulating on the second thread section 112 during screwing to affect screwing of the second thread section 112. The position of the opening 116 may be further disposed at a middle position of the second thread segment 112 to improve the stability of the fixation of the second thread segment 112 to the human bone.

In the embodiment shown in fig. 2, the bottom end of the second thread segment 112 may be formed with a first notch 1121 (shown in fig. 6) and/or the top end of the adjustment member may be formed with a second notch 121 (shown in fig. 7). The provision of the first notch 1121 and/or the second notch 121 allows the adjustment screw 1 to provide an operation space for mounting the screw body 11 and the adjustment member 12, so that the adjustment screw 1 is easy to mount.

As shown in fig. 2, in order to facilitate the screwing of the adjusting screw 1 into the bone grafting hole and to ensure the fixing effect of the adjusting screw 1, the outer diameter of the adjusting member 12 may be set to be equal to the outer diameter of the second threaded section 112.

In a preferred embodiment, when the adjacent bones are the sacrum and the ilium, the outer diameter of the adjusting screw 1 is in the range of 10-20mm, more preferably 12.5 mm; the length ranges are: 30mm to 100mm, and more preferably 60 mm. Through the arrangement, the length of the outer diameter of the adjusting screw 1 can be matched with the thickness of the sacrum and the ilium of a human body, and a better fixing effect is realized.

According to the adjusting device 100 for adjusting the interval between the adjacent bones of the present invention, as shown in fig. 1, 8 and 9, the adjusting device 100 for adjusting the interval between the adjacent bones may further include at least one fixing screw 2, the fixing screw 2 may include a screw section 21 and a nut section 22 detachably connected to an outer circumferential wall of a top end of the screw section 21, and the top end of the screw section 21 may be formed with a second operation hole 212 (shown in fig. 11) for screwing the screw section 21. Make through setting up set screw 2 the utility model discloses an adjusting device 100 for adjusting the interval between the adjacent bone utilizes adjusting screw 1 to realize adjusting the effect back of adjacent bone, can also realize better fixed action, avoids the interval between the adjacent bone to fix the emergence of unstable phenomenon after adjusting. The nut section 22 can play a certain tensioning role in the screwing process of the fixing screw 2, plays an auxiliary fixing role for the fixing screw 2, and effectively prevents the fixing screw 2 from being separated.

Preferably, as shown in fig. 12, the shape of the second operation hole 212 may also be the same as the hexagonal shape of the first operation hole 1111, and the beneficial effects thereof can be seen from the description of the first operation hole 1111, which will not be described herein.

In a preferred embodiment as shown in fig. 9, the top end of the nut segment 22 may be formed with at least one tensioning groove 221 communicating with the outer edge of the nut segment 22. Due to the arrangement of the tensioning groove 221, the nut segment 22 can slightly deform under the extrusion of an external force (for example, the nut segment 22 is extruded on the inner wall of the bone grafting hole), so that the nut segment 22 can be firmly clamped in the bone grafting hole, and the fixing strength of the fixing screw 2 can be further improved. Preferably, in order to achieve the tightening effect of the nut segment 22 in all directions, a plurality of tightening grooves 221 may be provided, and further preferably, the tightening grooves 221 are formed at equal intervals in the circumferential direction of the nut segment 22.

In a preferred embodiment as shown in fig. 2, the nut segment 22 may be formed in a frustoconical shape, and the frustoconical nut segment 22 may have a diameter that tapers from its top surface to its bottom surface. The arrangement can ensure that the nut section 22 is easy to deform slightly under the extrusion of external force, so as to further realize better tensioning effect of the nut section 22.

In a preferred embodiment as shown in FIG. 8, the bottom surface of the nut segment 22 may also be formed with a protrusion 222. The arrangement helps to prevent the nut segment 22 and the human bone from rotating relatively after being fixedly connected, so that the fixed connection between the nut segment 22 and the human bone can be more stable.

According to the adjusting device 100 for adjusting the space between adjacent bones of the utility model, as shown in fig. 8, the screw section 21 may include a nail body 211 (as shown in fig. 10), the nut section 22 is detachably connected at the top of the nail body 211, and an external thread 2111 may be formed on the peripheral wall of one end of the nail body 211, which is far away from the nut section 22. Through the arrangement, the external thread 2111 can be fixed with the bone of the human body only by being arranged to be a small section on the nail body 211, the structure is simpler, and the production cost is saved.

In a preferred embodiment, the outer diameter of the set screw 2 is in the range of 6-12mm, more preferably 7 mm; the length ranges are: 30mm to 100mm, preferably 60 mm. Through the arrangement, the length and the outer diameter of the fixing screw 2 can be matched with the thickness of the sacrum and the ilium of the human body, and a better fixing effect is realized.

In a preferred embodiment as shown in fig. 1, an adjustment device 100 for adjusting the spacing between adjacent bones may include two adjustment screws 1 and one set screw 2. The selection is most economical and effective by the cooperation of two adjusting screws 1 and one fixing screw 2, which can quickly and effectively adjust the space between adjacent bones and realize the stable fixation of the adjacent bones.

According to the utility model, the adjusting screw 1 and the fixing screw 2 can be made of titanium alloy material, and the outer surface thereof can be covered with a pure titanium coating. The arrangement can ensure that the adjusting screw 1 and the fixing screw 2 have good fusion with the human bone, and is beneficial to the fusion in the human bone.

Compared with the prior art, the utility model discloses an adjusting device 100 for adjusting the interval between the adjacent bone can realize interval adjustment and fixed action between the adjacent bone under the condition of minimal access surgery, its simple structure, and convenient operation is safe and effective, can realize fusing more fast with human skeleton simultaneously, has greatly reduced postoperative repair time, is favorable to extensively promoting and using.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. An adjustment device for adjusting the spacing between adjacent bones, comprising at least one adjustment screw comprising:

a screw body including a first thread section formed at an upper portion thereof and a second thread section formed at a lower portion thereof, an

An adjustment member formed with an internal thread to be fitted with the first thread section and an external thread formed on an outer surface of the adjustment member,

the thread pitch of the internal thread is different from that of the external thread, and a first operating hole for screwing the screw body is formed at the top end of the first thread section.

2. The adjustment device for adjusting the spacing between adjacent bones of claim 1, wherein the screw body further includes an axial through hole in communication with the first operative hole.

3. The adjustment device of claim 2, wherein the screw body further comprises an intermediate section connecting the first threaded section and the second threaded section, and at least one opening is formed in the intermediate section and/or the second threaded section that communicates with the axial through bore.

4. An adjustment device according to claim 3, wherein the second thread section has a first notch formed in a bottom end thereof and/or a second notch formed in a top end thereof.

5. The adjustment device of claim 1, wherein the adjustment member has an outer diameter sized to be equal to an outer diameter of the second thread segment.

6. The adjustment device for adjusting the spacing between adjacent bones according to any one of claims 1 to 5, further comprising at least one set screw including a screw section and a nut section detachably connected to a peripheral wall of a tip end of the screw section, the tip end of the screw section being formed with a second operation hole for screwing the screw section.

7. An adjustment device for adjusting the spacing between adjacent bones as claimed in claim 6, wherein the top end of the nut segment is formed with at least one tension groove communicating with the outer edge of the nut segment.

8. An adjustment device for adjusting the spacing between adjacent bones as claimed in claim 7, wherein the bottom surface of the nut segment is formed with a protrusion.

9. An adjustment device for adjusting the spacing between adjacent bones as claimed in claim 6, wherein the screw section includes a nail body, the nut section is detachably connected to the top of the nail body, and an outer peripheral wall of an end of the nail body remote from the nut section is formed with an external thread.

10. An adjustment device for adjusting the spacing between adjacent bones as claimed in claim 6, wherein the adjustment device for adjusting the spacing between adjacent bones comprises two of the adjustment screws and one of the set screws.

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