CN215821034U - Combined bone anchor - Google Patents
Combined bone anchor Download PDFInfo
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- CN215821034U CN215821034U CN202121235863.9U CN202121235863U CN215821034U CN 215821034 U CN215821034 U CN 215821034U CN 202121235863 U CN202121235863 U CN 202121235863U CN 215821034 U CN215821034 U CN 215821034U
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- threaded sleeve
- expandable threaded
- bone
- sutures
- screw
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Abstract
The utility model discloses a combined bone anchor, which comprises an expandable threaded sleeve, screws and four sutures; the expandable threaded sleeve is a hollow threaded sleeve, external threads are spirally wound on the outer portion of the expandable threaded sleeve, a central hole channel is formed in the expandable threaded sleeve, and the central hole channel is a round hole and is used for screwing the screw in; the side surface of the expandable threaded sleeve is provided with two openings, the openings are communicated with the central pore passage and are through holes, and the two openings correspond to each other at 180 degrees. According to the combined bone anchor provided by the utility model, the four sutures and the expandable threaded sleeve are integrated, so that the contact between the sutures and the bone is reduced, the friction is reduced, the situation that the sutures are broken by abrasion is reduced, and the service life of the sutures is prolonged; the expansion through the middle section can be so that thread bush and bone in close contact with, very big increase the friction to can effectively avoid this combination formula bone anchor nail the condition that becomes flexible and drop to appear, and then more be favorable to patient's recovery.
Description
Technical Field
The utility model relates to the technical field of bone anchors, in particular to a combined type bone anchor.
Background
Tendon avulsion from a bone surface dead center is a common type of injury in orthopedics, hand surgery, and sports medicine. The main clinical repair method is to use a suture bone anchor, which may be absorbable or non-absorbable. Currently, there are two main modes of non-absorbable screws used clinically, one is a metal thread screw, and the other is a micro metal screw (diameter 1.3mm) with barbs. The absorbable anchor is provided with a barb or a reverse clamping device. The anchor nail is provided with a hole, and a non-absorption line passes through the hole. When the device is used, a matched drill bit is used for drilling holes on the bone surface, then the screw type anchor is screwed in or the anchor with a barb/reverse clamp is pressed in, the anchor is fixed in the bone by utilizing the screw thread or the barb, and the broken end of the tendon is drawn together by a suture penetrating through the anchor, so that the aim of reconstructing the connection of the bone/the tendon is achieved.
While suture bone anchors have many advantages over earlier bone tunneling methods, long term clinical use of existing suture bone anchors has been found to have the following problems:
1. suture fraying, which occurs primarily at the suture hole or suture/bone cut of a metal anchor. [ 1.Ozbaydar M, Eihassan B, Warner JJ. the use of anchors in the bottom anchor supply a shift from metallic to bioadsorbent anchors Arthroscopy,2007,23(10):1124 and 1126; 2. analyzing the fracture reasons of Chinese orthopedics magazines 2013,33(9):965 + 970 ] after Shangxiang, Huayihui, Chengshi Yi rotator cuff repair;
2. the anchor loosens or falls out primarily due to reduced bone density or incorrect placement of the anchor. Even if the anchor falls off during the operation, the defect is often difficult to compensate. [ Roth CA, Bartolozze AR, Ciccott MG, et al. failure properties of failure anchors in the genetic and the effects of scientific thermal, Arthroscopy,1998,14(2):186-
Improvements to the above problems have been the goal of clinicians.
Chinese patent CN201286881Y proposes an allogeneic cortical bone anchor, which is implanted into a bone of a human body, and then a suture thread carried by the body of the bone is used to suture and fix injured tendon tissue, so as to firmly fix the injured tendon tissue with the bone and provide a firm initial tendon-bone fixing strength, thereby achieving the purpose of long-term tendon-bone healing, but the above problems still cannot be solved.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a combined type bone anchor aiming at overcoming the defects of the prior art, and aims to solve the problem that the bone anchor loosens or falls off in the using process after entering the bone.
The second purpose is to solve the problem that the thread on the anchor is easy to be broken in the using process.
(II) technical scheme
In order to achieve the purpose, the utility model provides the following technical scheme: the combined bone anchor comprises a threaded sleeve, screws and four sutures;
the expandable threaded sleeve is a hollow threaded sleeve, external threads are spirally wound on the outer portion of the expandable threaded sleeve, a central hole channel is formed in the expandable threaded sleeve, and the central hole channel is a round hole and is used for screwing the screw in;
the side surface of the expandable threaded sleeve is provided with two openings, the openings are communicated with the central pore passage and are through holes, and the two openings correspond to each other at 180 degrees;
all four sutures extend to the interior of the expandable threaded sleeve and are integrated with the expandable threaded sleeve.
Preferably, the expandable threaded sleeve, the screw and the suture are all made of degradable biological materials, the surface of the expandable threaded sleeve contains an hydroxyl apatite coating, and the screw is a headless screw.
Preferably, the expandable threaded sleeve comprises a midsection, a tail end, and a tip end;
the tip end is conical, and the tail end is hexagonal;
the side of the middle section is split through the opening and can be expanded;
the central bore extends through the trailing end and the medial section and into the interior of the tip.
Preferably, the outer diameter of the expandable threaded sleeve is 4.5mm, the length of the expandable threaded sleeve is 15mm, the diameter of the central hole channel is 1.5mm, the diameter of the screw is 1.8mm, the length of the screw is 12mm, and the length of the tail end of the screw is 2 mm.
A method of using a combination bone anchor comprising the steps of:
step one, drilling a bone hole on the bone surface of a bone by using a matched drill bit;
step two, screwing the expandable threaded sleeve into the bone hole, wherein the expandable threaded sleeve firstly enters the bone hole from the tip end and enables the suture to be positioned outside the corresponding bone when being screwed in;
after screwing in, the tail end is exposed outside the bone;
and step three, aligning the screw to the central pore passage of the expandable threaded sleeve, screwing the screw into the central pore passage, and expanding the middle section after the screw completely enters the interior of the threaded sleeve so as to be tightly pressed and fixed with the bone hole.
Preferably, the cavity has a diameter of 4.2mm and a depth of 13 mm.
(III) advantageous effects
Compared with the prior art, the utility model has the following beneficial effects:
according to the combined bone anchor provided by the utility model, the four sutures and the expandable threaded sleeve are integrated, so that the contact between the sutures and the bone is reduced, the friction is further reduced, the condition that the sutures are broken by abrasion is reduced, and the service life of the sutures is prolonged.
The combined bone anchor provided by the utility model can enable the threaded sleeve to be in close contact with a bone through the expansion of the middle section, so that the friction is greatly increased, the condition that the combined bone anchor is loosened and falls off can be effectively avoided, and the combined bone anchor is particularly suitable for the condition of osteoporosis and is further more beneficial to the rehabilitation of patients.
Drawings
FIG. 1 is a schematic structural view of a modular bone anchor according to the present invention;
FIG. 2 is a cross-sectional view of an expandable threaded sleeve according to the present invention;
FIG. 3 is a schematic cross-sectional view of a mid-section of the present invention;
FIG. 4 is a schematic view of the screw structure of the present invention;
FIG. 5 is a schematic view of the combination bone anchor of the present invention in connection with bone.
In the figure: 10 expandable threaded sleeve, 11 mid-section, 12 tail end, 13 tip, 20 external threads, 30 openings, 40 sutures, 50 central tunnels, 60 screws, 70 bone.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a combination bone anchor includes an expandable threaded sleeve 10, a screw 60, and four sutures 40; the expandable threaded sleeve 10 is a hollow threaded sleeve, external threads 20 are spirally wound on the outer portion of the expandable threaded sleeve, a central hole channel 50 is formed in the expandable threaded sleeve, and the central hole channel 50 is a round hole and is used for being screwed with a screw 60; the side surface of the expandable threaded sleeve 10 is provided with two openings 30, the openings 30 are communicated with the central pore channel 50 and are through holes, and the two openings correspond to each other at 180 degrees; all four sutures 40 extend into the interior of the expandable threaded sleeve 10 and are integrated with the expandable threaded sleeve 10; the screw 60 is a headless screw, and one end of the screw 60 is provided with a torx opening, or a hexagonal socket, preferably a hexagonal socket, for driving the screw 60 using existing tools.
When the suture connecting device is used, the four sutures 40 are integrated with the expandable threaded sleeve 10, so that the contact between the sutures 40 and bones is reduced, the friction is reduced, the condition that the sutures 40 are worn off is reduced, the service life of the sutures is prolonged, the sutures can be directly connected with tendons in an existing mode, and the operation is simple.
The expandable threaded sleeve 10, the screw 60 and the suture 40 are all made of degradable biological materials, and the surface of the expandable threaded sleeve 10 contains the hydroxyl apatite coating, so that the growth of bone can be induced, the recovery of a patient is accelerated, and the treatment effect is better.
The expandable threaded sleeve 10 comprises a middle section 11, a tail end 12 and a tip end 13; the tip 13 is conical, and the tail end 12 is hexagonal; the sides of the mid-section 11 are split by the opening 30 and can expand; a central bore 50 extends through the trailing end 12 and the intermediate section 11 and into the interior of the tip 13.
After fixing, the expansion through middle section 11 can be so that expandable threaded sleeve and bone in close contact with, very big increase the friction to can effectively avoid this combination formula bone anchor nail the condition that becomes flexible and drop to appear, and then more be favorable to patient's recovery.
A method of using a combination bone anchor comprising the steps of:
step one, drilling a bone hole on the bone surface of a bone by using a matched drill bit;
step two, sheathing the tail end 12 by using the existing tool, screwing the expandable threaded sleeve 10 into the bone hole, and when screwing in, firstly entering the bone hole from the tip 13 and enabling the suture line 40 to be outside the corresponding bone;
after screwing in, the tail end 12 is exposed outside the bone;
and step three, aligning the screw 60 with the central hole 50 of the expandable threaded sleeve, screwing the screw 60 into the central hole 50, and expanding the middle section 11 after the screw 60 completely enters the interior of the expandable threaded sleeve 10 so as to be further attached and fixed with the bone hole.
The first embodiment,
The expandable threaded sleeve 10 has an outer diameter of 4.5mm and a length of 15mm, the central bore 50 has a diameter of 1.5mm, the screw 60 has a diameter of 1.8mm and a length of 12mm, the tail end 12 has a length of 2mm, the hole has a diameter of 4.2mm and a depth of 13 mm.
Example II,
The expandable threaded sleeve 10 has an outer diameter of 5.5mm and a length of 15mm, the central bore 50 has a diameter of 1.7mm, the screw 60 has a diameter of 2.0mm and a length of 12mm, the tail end 12 has a length of 2mm, the hole has a diameter of 5.2mm and a depth of 13 mm.
Example III,
The expandable threaded sleeve 10 has an outer diameter of 3.5mm and a length of 13mm, the central hole 50 has a diameter of 1.3mm, the screw 60 has a diameter of 1.6mm and a length of 10mm, the tail end 12 has a length of 2mm, the bone hole has a diameter of 3.2mm and a depth of 11 mm.
Example four,
The expandable threaded sleeve 10 has an outer diameter of 2.5mm and a length of 10mm, the central bore 50 has a diameter of 0.9mm, the screw 60 has a diameter of 1.2mm and a length of 7mm, the tail end 12 has a length of 2mm, the hole has a diameter of 2.2mm and a depth of 8 mm.
Example V,
The expandable threaded sleeve 10 has an outer diameter of 1.5mm and a length of 8mm, the central bore 50 has a diameter of 0.5mm, the screw 60 has a diameter of 0.7mm and a length of 5mm, the tail end 12 has a length of 2mm, the hole has a diameter of 1.3mm and a depth of 6 mm.
Example six,
The central passage 50 is an internally threaded bore.
In conclusion, the combined bone anchor provided by the utility model has the advantages that the four sutures and the expandable threaded sleeve are integrated, so that the contact between the sutures and the bone is reduced, the friction is further reduced, the condition that the sutures are worn off is reduced, the service life of the sutures is prolonged, the threaded sleeve can be in close contact with the bone through the expansion of the middle section, the friction is greatly increased, the condition that the combined bone anchor is loosened and falls off can be effectively avoided, and the recovery of a patient is further facilitated.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A combined bone anchor, characterized by comprising an expandable threaded sleeve (10), a screw (60) and four sutures (40) in number;
the expandable threaded sleeve (10) is a hollow threaded sleeve, external threads (20) are spirally wound on the outer portion of the expandable threaded sleeve, a central hole (50) is formed in the expandable threaded sleeve, and the central hole (50) is a round hole and is used for being screwed into the screw (60);
the side surface of the expandable threaded sleeve (10) is provided with two openings (30), the openings (30) are communicated with the central pore passage (50) and are through holes, and the two openings correspond to each other at 180 degrees;
the four sutures (40) each extend into the interior of the expandable threaded sleeve (10) and are integrated into the expandable threaded sleeve (10).
2. The combination bone anchor of claim 1, wherein the expandable threaded sleeve (10), the screw (60) and the suture (40) are all made of a degradable biomaterial, the surface of the expandable threaded sleeve (10) comprises an apatite coating, and the screw (60) is a headless screw.
3. The combination bone anchor of claim 1, wherein the expandable threaded sleeve (10) comprises a mid-section (11), a tail end (12) and a tip end (13);
the tip (13) is conical, and the tail end (12) is hexagonal;
the side of the middle section (11) is split through the opening (30) and can be expanded;
the central bore (50) extends through the trailing end (12) and the intermediate section (11) and into the interior of the tip (13).
4. The combination bone anchor of claim 3, wherein the expandable threaded sleeve (10) has an outer diameter of 4.5mm and a length of 15mm, the central bore (50) has a diameter of 1.5mm, the screw (60) has a diameter of 1.8mm and a length of 12mm, and the trailing end (12) has a length of 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121235863.9U CN215821034U (en) | 2021-06-03 | 2021-06-03 | Combined bone anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121235863.9U CN215821034U (en) | 2021-06-03 | 2021-06-03 | Combined bone anchor |
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| Publication Number | Publication Date |
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| CN215821034U true CN215821034U (en) | 2022-02-15 |
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| CN202121235863.9U Active CN215821034U (en) | 2021-06-03 | 2021-06-03 | Combined bone anchor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115227310A (en) * | 2022-06-30 | 2022-10-25 | 宁波拜锐生物科技有限公司 | Folding suture anchor assembly |
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2021
- 2021-06-03 CN CN202121235863.9U patent/CN215821034U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115227310A (en) * | 2022-06-30 | 2022-10-25 | 宁波拜锐生物科技有限公司 | Folding suture anchor assembly |
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