TWI835590B - Implant - Google Patents

Abstract

This invention proposes an implant, which has an outer surface and a plurality of cavities. A plurality of openings are formed on the outer surface, and the cavities are respectively connected to the openings. Specifically, the body is a vascular stent, which has multiple strip structures and multiple tube bodies formed in the strip structures. The aforementioned openings and cavities are formed on the tube body. The area of the largest transverse section of the cavity is greater than the cross-sectional area of the openings, the transverse section being parallel to the outer surface. Therefore, the advantage of this invention is that the surface of the implant is formed with many openings connected to the cavity, so when the medicine is applied on the surface of the implant, the medicine can flow into the cavity. Since the maximum transverse cross-section of the cavity is larger than the opening, the medicament can flow into the cavity and not easily flow out through the opening, and more medicament can be adsorbed.

Description

Implant

This creation is about an implant implanted in the human body, especially the surface structure of the implant.

Many surgeries involve the implantation of artificial objects into the human body. These artificial objects are commonly known as implants. Common implants are artificial tooth roots for dental implant surgery or vascular stents for cardiac catheterization surgery. Artificial tooth root implants are inserted into the gums, so a small hole is pre-drilled in the bone of the gums for the artificial tooth roots to be inserted and fixed. Over time, the bone in the gums will grow, allowing the artificial tooth roots to be firmly fixed on the gums. However, the rate of bone growth is very slow, so patients have a lot of inconvenience after surgery. How to increase the speed of bone proliferation has become a major issue in dental implant surgery. On the contrary, if blood vessels proliferate after vascular stent graft surgery, the blood vessels are prone to blockage again. Therefore, how to reduce the re-blockage rate is also a major issue in vascular stent surgery.

The main purpose of this creation is to propose an implant that can absorb more pharmaceuticals, thereby helping the human body to partially recover from the implant, or to promote or slow down tissue proliferation depending on the situation.

In order to achieve the above purpose, the implant proposed in this creation is a vascular stent and has: A plurality of strip structures; and A plurality of tube bodies are formed on each strip-shaped structure; each tube body forms a cavity, and one end of each tube body is connected to the strip-shaped structure, and the other end forms an opening, and the opening is connected to the strip-shaped structure. Cavity; the end surfaces of the other ends of the tube bodies jointly form an outer surface.

Therefore, the advantage of this invention is that the surface of the implant is formed with many openings connected to the cavity, so when the medicine is applied on the surface of the implant, the medicine can flow into the cavity. Since the maximum transverse cross-section of the cavity is larger than the opening, the medicament can flow into the cavity and not easily flow out through the opening, and more medicament can be adsorbed.

As mentioned above, in the implant, the maximum transverse cross-sectional area of the cavities is greater than the cross-sectional area of the openings, and the maximum transverse cross-section is parallel to the outer surface.

The implant as mentioned above further has a plurality of channels, one end of which is connected to the openings, and the other end is connected to the cavities.

In the implant as mentioned above, the longitudinal sections of the cavities are circular, elliptical, oval, or triangular, and the longitudinal sections are perpendicular to the outer surface.

As mentioned above, in the implant, the transverse cross-sections of the cavities become larger as they are farther away from the outer surface, and the transverse cross-sections are parallel to the outer surface.

First, please refer to Figure 1 and Figure 3. This invention proposes an implant, which is a vascular stent A for cardiac catheterization surgery. The vascular stent A is generally a tube body composed of a mesh. Figure 2 shows a section of one of the filaments forming the mesh tube in the vascular stent A, and Figure 3 is a cross-section thereof. The vascular stent A has a strip structure 101 and a plurality of dense tube bodies 102 formed on each strip structure 101 . The strip structure 101 is one of the filaments of the aforementioned mesh tube.

In this embodiment, the ends of each tube body 102 connected to the strip structure 101 are adjacent. A cavity 12 is formed in the tube body 102 , and one end of the tube body 102 is connected to the strip structure 101 , and an opening 11 is formed at the other end, and the opening 11 is connected to the cavity 12 . Since the tube bodies 102 are densely arranged, the end surfaces of each tube body 102 relative to the end of the strip structure 101 can essentially jointly form the outer surface 10 of the vascular stent A. As shown in FIG. 3 , the cavity 12 may be a straight cylindrical cavity penetrating the tube body 102 , and specifically, the surface of the cavity 12 may be a flat surface, or may have an irregular concave-convex structure.

Next, please refer to Figure 4 to Figure 7. The longitudinal section of each cavity 12 may also be circular, elliptical, oval, or triangular, with the longitudinal section being perpendicular to the outer surface 10 . The transverse cross-section of each cavity 12 changes along the distance from the outer surface, and the maximum area of the transverse cross-section is larger than the cross-sectional area of the connected opening 11 , and the transverse cross-section is parallel to the outer surface 10 . Thereby, there is more space in the cavity 12 to absorb the medicine. For example, in the aspects shown in FIGS. 6 and 7 , the transverse cross-section of the cavity 12 becomes larger the further away from the outer surface 10 . In other words, in this aspect, the longitudinal cross-section of the cavity 12 may be triangular.

As shown in FIGS. 4 and 6 , the tube body 102 may optionally have a plurality of channels 13 , and the cavity 12 is connected to the opening 11 through the channels 13 . Specifically, one end of the channel 13 is connected to an opening 11 , and the other end is connected to a cavity 12 . In this embodiment, an opening 11 is connected to a channel 13 and to a cavity 12 . As shown in FIGS. 5 and 7 , in another aspect of this embodiment, there may be no channel, but a cavity 12 directly connected to the opening 11 .

Through the above structure, many openings 11 connected to the cavity 12 are formed on the surface of the implant. Therefore, when the drug is applied on the surface of the implant, the drug can flow into the cavity 12 . Since the maximum transverse cross-section of the cavity 12 is larger than the opening 11 , the medicine can flow into the cavity 12 and not easily flow out through the opening 11 , and more medicine can be adsorbed. When the implant is vascular stent A, the drug contains ingredients that prevent blood vessel proliferation. Therefore, the implant of this invention can absorb more drugs to reduce blood vessel proliferation, thereby reducing the re-occlusion rate of blood vessels after surgery.

10:Outer surface 11: Open your mouth 12:Cavity 13:Channel 101: Strip structure 102: Pipe body A: Vascular stent

Figure 1 is a three-dimensional schematic diagram of this creation. Figure 2 is a three-dimensional schematic diagram of the tube body of this invention. Figure 3 is a schematic cross-sectional view of this creation. Figure 4 is a schematic cross-sectional view of another aspect of the tube body of this invention. Figure 5 is a schematic cross-sectional view of another aspect of the tube body of this invention. Figure 6 is a schematic cross-sectional view of another aspect of the tube body of this invention. Figure 7 is a schematic cross-sectional view of another aspect of the tube body of this invention.

11: Open your mouth 12:Cavity 101: Strip structure 102: Pipe body A: Vascular stent

Claims (5)

An implant is a vascular stent and has: A plurality of strip structures; and A plurality of tube bodies are formed on each strip-shaped structure; each tube body forms a cavity, and one end of each tube body is connected to the strip-shaped structure, and the other end forms an opening, and the opening is connected to the strip-shaped structure. Cavity; the end surfaces of the other ends of the tube bodies jointly form an outer surface. The implant of claim 1, wherein the maximum area of the transverse sections of the cavities is greater than the cross-sectional area of the openings, and the transverse sections are parallel to the outer surface. The implant according to claim 1 further has a plurality of channels, one end of which is connected to the openings, and the other end is connected to the cavities. The implant according to any one of claims 1 to 3, wherein the longitudinal sections of the cavities are circular, elliptical, oval, or triangular, and the longitudinal sections are perpendicular to the outer surface. The implant according to any one of claims 1 to 3, wherein the transverse cross-sections of the cavities become larger as they are farther away from the outer surface, and the transverse cross-sections are parallel to the outer surface.