HA coating PEEK anchor with expansion wings

Abstract

The HA coating PEEK anchor with the expansion wings comprises an anchor body, the head of the anchor body is in a conical tip shape, the outer wall of the anchor body of the anchor body is provided with a barb structure, and the tail of the anchor body is provided with a fastening channel extending in the axial direction of the anchor body. A plurality of wing penetrating channels which penetrate through a rivet body and are communicated with the fastening channel are formed in the rivet body of the rivet body, expansion wings are movably installed in the wing penetrating channels, and ejection screws used for ejecting the expansion wings out of the wing penetrating channels are movably installed in the fastening channel. The outer surface of the anchor main body is coated with an HA coating; and the anchor main body, the expansion wings and the ejection screw are PEEK bodies. Expansion of the expansion wings can be achieved through axial movement of the ejection screw, and the expansion degree of the expansion wings can be increased by rotating the hexagonal driving part. On one hand, the fixing strength of the anchor is improved to a great extent, and on the other hand, the anchor can be suitable for different bone conditions and is particularly suitable for patients with osteoporosis or undetailed bone conditions to a great extent.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a HA-coated PEEK anchor with an expansion wing. Background Technology

[0002] In modern medical technology, with the increasing aging of the population, more and more people are facing the risk of osteoporosis. While traditional orthopedic anchors made of metal or pure polymers can achieve a certain degree of bone fixation, their high rigidity and lack of elasticity can easily lead to stress concentration in fragile bone, increasing the risk of fractures or causing poor healing. Furthermore, traditional materials often lack good cell affinity, hindering the formation of stable connections around new bone tissue, thus affecting long-term efficacy. In recent years, to address these issues, researchers have begun exploring the use of composite materials with excellent mechanical and biological properties to prepare next-generation high-performance medical implants. The application of non-metallic materials such as polyetherketone (PEEK) and calcium phosphate ceramics is gradually increasing, and significant results have been achieved.

[0003] PEEK material itself possesses good mechanical properties and chemical resistance, but standard anchors made from this material alone cannot fully meet specific clinical needs. Based on this, some simple geometrically modified anchors (such as those with uneven surfaces) have been developed in an attempt to enhance friction and thus improve the reliability of short-term fixation. However, this method has limited effectiveness in promoting bone ingrowth, and it is still difficult to maintain an ideal level of support when encountering severe bone loss.

[0004] While various improvements to anchor design in related technologies have their advantages, they also reveal numerous limitations when dealing with complex and varied real-world cases, especially in patients with poor bone density. A common weakness is insufficient initial adhesion after implantation, meaning that even minor external impacts can easily cause displacement or dislodgement. Furthermore, they cannot guarantee sufficient sustained support in later stages, which means patients may experience prolonged pain and a higher likelihood of needing further intervention. Utility Model Content

[0005] The purpose of this invention is to at least partially solve the problem mentioned in related technologies of weak anchor fixation strength and easy loosening in patients with fragile bones. In view of this, an HA-coated PEEK anchor with expansion wings is provided, including an anchor body, the head of the anchor body is conical, the outer wall of the anchor body is provided with a barb structure, the tail of the anchor body is provided with a fastening channel extending along the axial direction of the anchor body, the anchor body is provided with a plurality of through-wing channels that penetrate the anchor body and communicate with the fastening channel, an expansion wing is movably installed in the through-wing channel, and an ejector screw for pushing the expansion wing out of the through-wing channel is movably installed in the fastening channel.

[0006] According to an example of the present invention, the inner wall of the anchor body near the nail head is provided with a threaded section, the bottom end of the ejector screw is provided with a threaded head adapted to be screwed into the threaded section, the middle section of the ejector screw has a tapered structure that is narrow at the bottom and wide at the top, and one end of the expansion wing that extends into the fastening channel abuts against the middle section of the ejector screw.

[0007] According to one example of the present invention, the through-wing channel is an arc-shaped channel extending obliquely upward from the inside to the outside, and the expansion wing is an arc-shaped wing with a pointed outer end.

[0008] According to an example of the present invention, a threading channel is provided radially through the nail body near the nail head end of the anchor body, and two wire grooves are provided on opposite sides of the anchor body, which pass through the barb structure and communicate with the threading channel.

[0009] According to one example of the present invention, the anchor body is further provided with a through hole for connecting the fastening channel and the threading channel.

[0010] According to one example of the present invention, the wing-through channel is provided with four channels, which are evenly distributed circumferentially in the middle of the nail body of the anchor body.

[0011] According to one example of the present invention, the outer surface of the anchor body is coated with an HA coating.

[0012] According to one example of the present invention, the thickness of the HA coating is 50-80 micrometers.

[0013] According to one example of the present invention, the top of the ejector screw is provided with an internal hexagonal drive groove at the center.

[0014] According to one example of this utility model, the anchor body, the expansion wing, and the ejector screw are all PEEK bodies.

[0015] Compared with the prior art, the technical solution of this utility model has the following advantages:

[0016] 1. The anchor of this application is equipped with an expansion wing, which can be expanded according to the patient's bone condition. The expansion of the expansion wing can be achieved by the axial movement of the ejector screw. The ejector screw is provided with a hexagonal drive groove, and the expansion degree of the expansion wing can be pushed by rotating the hexagonal drive part. On the one hand, it greatly improves the fixation strength of the anchor, and on the other hand, it makes the anchor suitable for different bone conditions, especially suitable for patients with osteoporosis or unknown bone conditions.

[0017] 2. The anchor of this application has a barb structure on the outer wall, which can be inserted by tapping the end of the anchor during the insertion process, which is convenient and quick; the side of the anchor body has a suture groove and the front end has a thread channel, which can slide through the suture groove, which is conducive to the suture sealing tissue and knotting.

[0018] 3. All components of the anchor are made of PEEK material, and the outer surface of the anchor body is coated with HA coating, which gives the anchor good mechanical properties and biocompatibility, which is beneficial to new bone growth and postoperative recovery of patients.

[0019] Additional aspects and advantages of this 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. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural diagram of a HA-coated PEEK anchor with an expansion wing in the retracted state of the expansion wing according to this utility model.

[0022] Figure 2 This is a utility model Figure 1 A sectional view along line AA.

[0023] Figure 3 This is a structural diagram of a HA-coated PEEK anchor with an expanded wing in the expanded wing protruding state.

[0024] Figure 4 This is a utility model Figure 3 BB line section view.

[0025] Figure 5 This is another structural diagram of the anchor bolt expansion wing of this utility model in the extended state.

[0026] Figure 6This is a structural diagram of the anchor body of this utility model.

[0027] Figure 7 This is a structural diagram of the expanded wing of this utility model.

[0028] Figure 8 This is a structural diagram of the ejector screw of this utility model.

[0029] The attached diagram is labeled as follows: 1. Anchor body, 2. Barb structure, 3. Fastening channel, 4. Through-wing channel, 5. Expansion wing, 6. Ejection screw, 7. Threaded head, 8. Threading channel, 9. Wire groove, 10. Through hole, 11. Internal hexagon drive groove. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. Example

[0031] Please see Figures 1-8 As shown, this utility model provides an HA (Hydroxyapatite) coated PEEK (polyether ether ketone) anchor with an expansion wing, including an anchor body 1. The head of the anchor body 1 is conical. The outer wall of the anchor body 1 is provided with a barb structure 2. The tail of the anchor body 1 is provided with a fastening channel 3 extending along the axial direction of the anchor body 1. The anchor body 1 is provided with several through-wing channels 4 that penetrate the anchor body and communicate with the fastening channel 3. An expansion wing 5 is movably installed in the through-wing channel 4. An ejection screw 6 for ejecting the expansion wing 5 out of the through-wing channel 4 is movably installed in the fastening channel 3.

[0032] The anchor of this application is equipped with an expansion wing 5, which can be expanded according to the patient's bone condition. The expansion of the expansion wing 5 can be achieved by the axial movement of the ejector screw 6. The ejector screw 6 is provided with an internal hexagonal drive groove 11, and the expansion degree of the expansion wing 5 can be pushed by rotating the hexagonal drive part. On the one hand, it greatly improves the fixation strength of the anchor, and on the other hand, it makes the anchor suitable for different bone conditions, especially suitable for patients with osteoporosis or unknown bone conditions. During the implantation process, the anchor is inserted by tapping the tail of the nail, which is convenient and quick. The barbed structure 2 makes the implanted anchor more secure and less prone to loosening.

[0033] Among them, the anchor body 1, the expansion wing 5 and the ejector screw 6 are all PEEK bodies. The PEEK anchor body 1 and other components can be manufactured by machining, injection molding or 3D printing technologies, so that the anchor as a whole has good mechanical properties.

[0034] In this embodiment, the outer surface of the anchor body 1 is coated with an HA coating. The HA coating is applied to the outside of the anchor body 1 using methods such as plasma spraying, electrochemical deposition, ion implantation, etc., with plasma spraying being preferred. The crystallinity of the formed HA coating is required to be above 90%, preferably above 95%. The particle size is between 30 and 50 micrometers. The average thickness of the HA coating applied to the outer surface of the anchor body 1 is 50 to 80 micrometers. This coating gives the anchor good biocompatibility, which is beneficial for new bone growth and postoperative recovery of the patient.

[0035] According to one example of this utility model, the inner wall of the anchor body 1 near the nail head is provided with a threaded section, and the upper middle section of the inner wall is smooth. The bottom end of the ejector screw 6 is provided with a threaded head 7 adapted to be screwed into the threaded section. The outer wall of the middle section of the ejector screw 6 has a tapered structure that is narrow at the bottom and wide at the top. One end of the expansion wing 5 that extends into the fastening channel 3 abuts against the outer wall of the middle section of the ejector screw 6 and is close to the wall surface. As the ejector screw 6 is screwed in along the nail body axial direction, the outer wall of the ejector screw 6 will continuously squeeze the expansion wing 5 to extend outward and drill in obliquely upward to fix it.

[0036] According to one example of this utility model, the through-wing channel 4 is an arc-shaped channel extending obliquely upward from the inside to the outside, and the expansion wing 5 is an arc-shaped wing with a pointed outer end. The overall shape and size of the expansion wing 5 are adapted to the arc-shaped channel. Preferably, there are four through-wing channels 4, which are evenly distributed circumferentially in the middle of the anchor body 1.

[0037] According to one example of this utility model, a threading channel 8 is provided radially through the nail body near the nail head end of the anchor body 1. The threading channel 8 is designed for threading and hooking the suture. Two grooves 9 are provided on opposite sides of the anchor body 1, which pass through the barb structure 2 and communicate with the threading channel 8. The suture can slide through the grooves 9, which is beneficial for the suture to seal the tissue and tie the knot.

[0038] According to an example of the present invention, the anchor body 1 is also provided with a through hole 10 for connecting the fastening channel 3 and the wire channel 8. The design of the through hole 10 allows the fastening channel 3 to be connected to the external space, so as to avoid the formation of a closed high-pressure cavity at the lower end of the fastening channel 3 when the ejector screw 6 is screwed in, which would affect the fastening effect of the ejector screw 6.

[0039] The implantation process for the anchors in this application is as follows:

[0040] S1. The anchor is driven into the bone at the desired location, so that the tail of the anchor is flush with the bone surface.

[0041] S2. Using a hex screwdriver, insert it into the internal hex drive slot at the end of the screw and screw it in clockwise.

[0042] S3. As the ejector screw is screwed in, the outer conical surface of the ejector screw will eject the evenly distributed expansion wings.

[0043] S4. Continue until the ejector screw is turned to the bottom of the thread, the expansion wing reaches its maximum expansion range, and the anchor is implanted.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0046] For those skilled in the art, various changes and modifications will undoubtedly be apparent after reading the above description. Therefore, the appended claims should be considered as covering all changes and modifications that encompass the true intent and scope of this utility model. Any and all equivalent scope and content within the scope of the claims should be considered as still falling within the intent and scope of this utility model.

Claims

1. A HA-coated PEEK anchor with an expanding wing, comprising an anchor body, wherein the head of the anchor body is conical, and the outer wall of the anchor body is provided with a barb structure, characterized in that: The anchor body has a fastening channel extending along the axial direction of the anchor body at the tail end. The anchor body has several through-wing channels that penetrate the anchor body and communicate with the fastening channel. An expansion wing is movably installed in the through-wing channel. An ejection screw for pushing the expansion wing out of the through-wing channel is movably installed in the fastening channel.

2. The HA-coated PEEK anchor with expanded wings according to claim 1, characterized in that: The anchor body has a threaded section on the inner wall near the head, and the bottom of the ejector screw has a threaded head adapted to be screwed into the threaded section. The middle section of the ejector screw has a tapered structure that is narrow at the bottom and wide at the top. One end of the expansion wing that extends into the fastening channel abuts against the middle section of the ejector screw.

3. The HA-coated PEEK anchor with expanded wings according to claim 1, characterized in that: The through-wing channel is an arc-shaped channel extending obliquely upward from the inside to the outside, and the expanded wing is an arc-shaped wing with a pointed outer end.

4. The HA-coated PEEK anchor with expanded wings according to claim 1, characterized in that: The anchor body has a threading channel running through it radially along the nail body near the nail head end. The two sides of the anchor body have two grooves that pass through the barb structure and communicate with the threading channel.

5. A HA-coated PEEK anchor with expanded wings according to claim 4, characterized in that: The anchor body is also provided with a through hole for connecting the fastening channel and the threading channel.

6. The HA-coated PEEK anchor with expanded wings according to claim 1, characterized in that: The wing-through channel is provided in four parts, which are evenly distributed circumferentially in the middle of the anchor body.

7. The HA-coated PEEK anchor with expanded wings according to claim 2, characterized in that: The top of the ejector screw has an internal hexagonal drive groove in the middle.

8. The HA-coated PEEK anchor with expanded wings according to claim 1, characterized in that: The outer surface of the anchor body is coated with an HA coating.

9. A HA-coated PEEK anchor with expanded wings according to claim 8, characterized in that: The thickness of the HA coating is 50-80 micrometers.

10. A HA-coated PEEK anchor with expanded wings according to claim 1, characterized in that: The anchor body, expansion wing, and ejector screw are all made of PEEK.

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