CN-224220184-U - HA coating PEEK anchor nail with expansion wings

CN224220184UCN 224220184 UCN224220184 UCN 224220184UCN-224220184-U

Abstract

The utility model discloses an HA coating PEEK anchor with expansion wings, which comprises an anchor body, wherein the head part of the anchor body is in a conical tip shape, a barb structure is arranged on the outer wall of the anchor body, a fastening channel extending along the axial direction of the anchor body is arranged at the tail part of the anchor body, a plurality of wing penetrating channels which penetrate through the anchor body and are communicated with the fastening channel are arranged on the anchor body of the anchor body, the expansion wings are movably arranged in the wing penetrating channels, ejection screws for ejecting the expansion wings out of the wing penetrating channels are movably arranged in the fastening channels, the outer surface of the anchor body is coated with the HA coating, and the anchor body, the expansion wings and the ejection screws are PEEK bodies. The expansion of the expansion wings can be achieved by axial movement of the ejector screw, and the degree of expansion of the expansion wings can be pushed by rotating the hexagonal driving portion. On the 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 especially suitable for patients with osteoporosis or inconclusive bone conditions to a great extent.

Inventors

LI JIN
XIA CHENJIE
LI LENING
ZHOU KE
Dai Haoqiang

Assignees

宁波市医疗中心李惠利医院(宁波大学附属李惠利医院)

Dates

Publication Date: 20260512
Application Date: 20250122

Claims (10)

1. The utility model provides a take HA coating PEEK anchor of expansion wing, includes anchor main part, the nail head of anchor main part is the awl point form, the nail body outer wall of anchor main part is equipped with barb structure, its characterized in that: the screw tail of the anchor body is provided with a fastening channel extending along the axial direction of the anchor body, the screw body of the anchor body is provided with a plurality of wing penetrating channels which penetrate through the screw body and are communicated with the fastening channel, the wing penetrating channels are internally movably provided with expansion wings, and the fastening channels are internally movably provided with ejection screws for ejecting the expansion wings out of the wing penetrating channels.
2. The HA coating PEEK anchor with expansion wings according to claim 1, wherein the inner wall of the anchor body, which is close to the nail head, is provided with a threaded section, the bottom end of the ejection screw is provided with a threaded head which is adapted to be screwed into the threaded section, the outer wall of the middle section of the ejection screw is in a conical structure with a narrow bottom and a wide top, and one end, which extends into the fastening channel, of the expansion wings is abutted against the outer wall of the middle section of the ejection screw.
3. The HA coated PEEK anchor with expansion wings according to claim 1, wherein the wing penetrating channel is an arc-shaped channel extending upwards from inside to outside, and the expansion wings are arc-shaped wing bodies with sharp corners at the outer ends.
4. The HA coating PEEK anchor with expansion wings according to claim 1, wherein the anchor body near one end of the anchor body is provided with a threading channel in a penetrating manner along the radial direction of the anchor body, and two sides of the anchor body are provided with two wire slots which respectively penetrate through the barb structures and are communicated with the threading channel.
5. The HA coated PEEK anchor with expansion wings as set forth in claim 4, wherein the anchor body further comprises a through hole therethrough for communicating the fastening passage with the threading passage.
6. The HA coated PEEK anchor with expansion wings according to claim 1, wherein four wing penetrating channels are arranged and are uniformly distributed in the circumference of the middle part of the anchor body.
7. The HA coated PEEK anchor with expansion wings according to claim 2, wherein the middle of the top end of the ejection screw is provided with a hexagon socket driving groove.
8. The HA coated PEEK anchor with expansion wings of claim 1 wherein the outer surface of the anchor body is coated with an HA coating.
9. The HA coated PEEK anchor with expansion wings of claim 8 wherein the thickness of the HA coating is 50-80 microns.
10. The HA coated PEEK anchor with expansion wings of claim 1, wherein the anchor body, expansion wings and ejection screw are PEEK bodies.

Description

HA coating PEEK anchor nail with expansion wings Technical Field The utility model relates to the technical field of medical instruments, in particular to an HA coating PEEK anchor with expansion wings. Background In modern medical technology, as the population ages, more and more people face the risk of osteoporosis. Although the traditional orthopaedics anchor nail made of metal or pure polymer can realize the function of fixing bones to a certain extent, the traditional orthopaedics anchor nail is high in rigidity and lacks elasticity, and is easy to cause stress concentration phenomenon under the condition of weak facing bones, so that the problems of increased fracture risk, poor healing and the like are caused. In addition, conventional material surfaces often do not have good cell affinity, which is detrimental to the formation of stable connective structures around the newly formed bone tissue, which can have an impact on long term efficacy. In recent years, in order to improve these conditions, researchers have been exploring the use of composite materials having excellent mechanical properties and biological characteristics to prepare new generation high performance medical implants, such as non-metallic materials of Polyetherketone (PEEK), calcium phosphate ceramics, etc., with increasing applications and remarkable results. PEEK material has good mechanical property and chemical corrosion resistance, but the common form anchor made of the PEEK material cannot fully meet specific clinical requirements. On this basis, some simple geometric feature modified anchors (such as rugged) extend, so as to attempt to enhance friction force and thus improve the reliability of short-term fixation. However, this approach has limited effectiveness in promoting bone ingrowth and still has difficulty maintaining a desired level of support when severe bone mass loss is encountered. Improvements in anchor design have been advantageous in the related art, but have revealed many limitations in dealing with complex and variable actual cases, particularly poor patient bone density. They generally have the fundamental weakness of insufficient initial grip after implantation, i.e. they are easily displaced or even fall off once subjected to a slight external impact. In addition, sufficient sustained support force cannot be ensured even at a later stage, which means that the patient may experience longer periods of pain and a higher likelihood of re-intervention. Disclosure of utility model The utility model aims to solve the problems of weak anchor fixing strength and easy loosening of the patient bone fracture mentioned in the related art at least to a certain extent, and in view of the problems, the utility model provides an HA coating PEEK anchor with an expansion wing, which comprises an anchor body, wherein the head of the anchor body is in a conical tip shape, 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 body of the anchor body is provided with a plurality of wing penetrating channels communicated with the fastening channel, the wing penetrating channels are internally movably provided with expansion wings, and the fastening channels are internally movably provided with ejection screws for ejecting the expansion wings out of the wing penetrating channels. According to one example of the utility model, a threaded section is arranged on the inner wall of the anchor main body near the nail head, a threaded head which is adapted to be screwed into the threaded section is arranged at the bottom end of the ejection screw, the outer wall of the middle section of the ejection screw is in a conical structure with a narrow bottom and a wide top, and one end of the expansion wing extending into the fastening channel is abutted against the outer wall of the middle section of the ejection screw. According to one example of the utility model, the wing penetrating channel is an arc-shaped channel extending upwards from inside to outside, and the expansion wings are arc-shaped wing bodies with sharp-angled outer ends. According to one example of the utility model, the shank of the anchor body near one end of the nail head is provided with a threading channel in a penetrating manner along the radial direction of the anchor body, and two sides of the anchor body are oppositely provided with two wire grooves which respectively penetrate through the barb structures and are communicated with the threading channel. According to an example of the utility model, the anchor body is further provided with a through hole penetrating through the anchor body for communicating the fastening channel and the threading channel. According to one example of the utility model, four wing penetrating channels are arranged, and the four wing penetrating channels are uniformly distributed in the circumferent