CN214180557U

CN214180557U - Absorbable bone rod

Info

Publication number: CN214180557U
Application number: CN202022755133.3U
Authority: CN
Inventors: 赵金忠; 孙杨; 蒋佳; 王明军; 燕晓宇
Original assignee: Lixin Shenzhen Medical Devices Co ltd
Current assignee: Lixin Shenzhen Medical Devices Co ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-09-14
Anticipated expiration: 2030-11-24

Abstract

The utility model provides an absorbable bone rod, a serial communication port, including be columnar main part and form a plurality of juts in the main part periphery, the main part has near-end and distal end, a plurality of juts are arranged along the length direction of main part, the round platform structure of jut for having the through-hole, the round platform structure has the upper surface and the lower surface relative with the upper surface, the area of upper surface is less than the area of lower surface, the upper surface of round platform structure is towards the near-end of main part, the through-hole link up upper surface and lower surface, main part and through-hole phase-match, thereby the main part passes the through-hole and makes the main part periphery be formed with the jut, and absorbable bone rod adopts the preparation of absorbable material to form, absorbable bone rod integrated into one piece. Under this condition, can adopt the strike formula to implant to absorbing bone stick, can reduce the damage and effectively avoid absorbing bone stick implantation too deeply, can also fix inside the bone better.

Description

Absorbable bone rod

Technical Field

The utility model relates to the field of medical equipment, concretely relates to can absorb bone stick.

Background

With the increase of population and aging, patients with bone defects caused by diseases, accidents and the like are increasing, and the clinical requirements of bone repair treatment are increasing year by year. In the orthopedic repair treatment operation, the damaged bone needs to be fixed by using bone screws, bone fracture plates and other implantation instruments. Accordingly, the demand for bone fixation implant devices has also increased.

The existing bone screw is usually made of metal materials, cannot be absorbed by a human body, and may cause the human body to generate certain rejection in the later period; moreover, the existing bone screw adopts a thread structure, so that the phenomenon of over-head twisting is easy to occur when the bone screw is screwed down when the fracture part is fixed, soft tissues and periosteum need to be stripped in a larger range when the bone screw is implanted, and the blood circulation damage to the bone and the fracture part is large, so that the reliability of fracture fixation is reduced, the healing time of the fracture is prolonged, the success rate of the operation is low, the existing bone screw is generally implanted into the bone difficultly, and is difficult to fix after being implanted into the bone, and the bone screw is easy to withdraw from the bone.

SUMMERY OF THE UTILITY MODEL

The present invention has been made in view of the above-mentioned prior art, and an object of the present invention is to provide an absorbable bone rod which is made of an absorbable material, can be safely implanted into the inside of a bone and can reduce the damage, and is advantageous for the growth of bone tissue and can be better fixed in the inside of the bone.

Therefore, the utility model provides an absorbable bone rod, a serial communication port, include: a columnar main body part and a plurality of protrusion parts formed on the periphery of the main body part, the body portion having a proximal end and a distal end, the plurality of protrusions being aligned along a length of the body portion, the protruding part is a circular truncated cone structure with a through hole, the circular truncated cone structure is provided with an upper surface and a lower surface opposite to the upper surface, the area of the upper surface is smaller than that of the lower surface, the upper surface of the circular truncated cone structure faces the proximal end of the main body part, the through hole penetrates through the upper surface and the lower surface, the main body part is matched with the through hole, the body portion passes through the through hole such that the protrusion is formed on the outer circumference of the body portion, and the absorbable bone rod is made of absorbable materials, and the absorbable bone rod is integrally formed.

The utility model discloses in, can absorb the bone stick and adopt the preparation of absorbable material, can absorb the bone stick and include the main part and form a plurality of juts in the main part periphery, the round platform structure of jut for having the through-hole, and the through-hole can match with the main part. Under this condition, can adopt the strike formula to implant to absorbing bone stick, can reduce the damage and effectively avoid absorbing bone stick implantation too deeply, can also fix inside the bone better.

In addition, in the absorbable bone rod of the present invention, optionally, the absorbable material is composed of an absorbable polymer material and inorganic particles, the absorbable polymer material is selected from one of polylactic acid material, polycaprolactone, polydioxanone and polyglycolic acid, or one of more than two-membered random copolymer or block copolymer selected from lactide, caprolactone, polydioxanone and glycolide, and the inorganic particles are selected from one of hydroxyapatite, tricalcium phosphate, calcium phosphate and silicate. In this case, by manufacturing the absorbable bone rod using the absorbable material, not only the occurrence of the secondary operation can be effectively prevented, but also various inconveniences such as the inability to perform nuclear magnetic resonance examination or the occurrence of inflammation such as synovitis, which may be caused by the absorbable bone rod remaining in the body, can be effectively suppressed.

In addition, in the absorbable bone rod of the present invention, the plurality of protrusions may be formed continuously around the main body, and adjacent protrusions may be in contact with each other. This can facilitate better fixation of the resorbable bone rod within the bone.

In addition, in the absorbable bone rod of the present invention, optionally, a circular arc transition is employed between adjacent protrusions. Therefore, the friction force between the absorbable bone rod and the implanted bone can be increased, and the absorbable bone rod can be better fixed in the bone.

Additionally, in the absorbable bone rod of the present invention, optionally, the maximum diameter of the absorbable bone rod is 1mm to 5 mm. In this case, the resorbable bone rods can be selected to be of a suitable size, which makes them suitable for different implants into bone.

In addition, in the absorbable bone rod of the present invention, optionally, the length of the absorbable bone rod is 10mm to 100 mm. In this case, the resorbable bone rods can be selected to be of a suitable size, which makes them suitable for different implants into bone.

In addition, in the absorbable bone rod of the present invention, optionally, the shape and size of each protrusion are the same. Therefore, the absorbable bone rod can be implanted into the bone easily.

Further, in the absorbable bone rod of the present invention, optionally, an outer diameter ratio of the upper surface to the lower surface is 1: 1.1 to 1: 1.5. Under the condition, the diameter of the absorbable bone rod can be effectively ensured, so that the influence on the mechanical property is reduced.

Further, in the resorbable bone rod of the present invention, optionally, an end surface of the proximal end of the main body portion is coplanar with an upper surface of a first target protrusion of the plurality of protrusions. In this case, the end surface of the proximal end of the main body portion can be flush with the upper surface of the target protrusion portion.

In addition, in the absorbable bone rod of the present invention, optionally, the upper surface of the first target protrusion and the corner of the side surface are in a rounded transition. Therefore, the resistance during the implantation can be reduced, and the absorbable bone rod can be implanted better.

According to the utility model discloses, provide an adopt can absorb the material preparation, can implant inside the bone safely and reduce the damage, and be favorable to bone tissue to grow and can be better fix can absorb the bone stick inside the bone.

Drawings

Fig. 1 is a view showing an application scenario of the resorbable bone rod according to the present embodiment.

Fig. 2 is a perspective view showing one angle of the resorbable bone rod according to the present embodiment.

Fig. 3 is a perspective view showing another angle of the resorbable bone rod in accordance with the present embodiment.

Fig. 4 is a perspective view showing another different angle of the resorbable bone rod in accordance with the present embodiment.

Fig. 5 is a schematic diagram showing a structure of the protrusion according to the present embodiment.

Fig. 6 is a partial enlarged view of S in fig. 4 according to the present embodiment.

Fig. 7 is a partially enlarged view of a portion a in fig. 2 according to the present embodiment.

Fig. 8 is a partially enlarged view of a portion B in fig. 3 according to the present embodiment.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same components are denoted by the same reference numerals, and redundant description thereof is omitted. The drawings are schematic and the ratio of the dimensions of the components and the shapes of the components may be different from the actual ones.

It is noted that the terms "comprises," "comprising," and "having," and any variations thereof, in the present disclosure, such that a process, method, system, article, or apparatus that comprises or has a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include or have other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 is a view showing an application scenario of an absorbable bone rod 10 according to the present embodiment.

In bone surgery, it is often necessary to fix a fracture site (also referred to as "damaged bone 20" or "implanted bone 20") with bone screws. The utility model provides an absorbable bone rod 10. Wherein the resorbable bone rod 10 may be used to secure damaged bone in place of bone screws (see fig. 1). The utility model discloses in, can absorb bone stick 10 can adopt can absorb the material preparation to can implant inside the bone and can fix better more easily, can be absorbed by the human body after implanting and restrain the emergence of secondary operation.

The utility model discloses in, can absorb bone stick 10 and implant in the bone of bone external damaged bone 20, can arrange the both sides at the fracture position respectively in until can absorbing bone stick 10 and implement fixedly in order to fracture position. In one embodiment of the present invention, the resorbable bone shaft 10 may be percussive implanted into the bone and fixated to the damaged bone 20 (see fig. 1). In this case, the absorbable bone rod 10 can be prevented from being implanted too deeply with reduced trauma and yet be better secured within the bone than a screw-in implant of a bone screw.

Fig. 2 is a perspective view showing one angle of the resorbable bone rod 10 according to the present embodiment. Fig. 3 is a perspective view showing another angle of the resorbable bone rod 10 according to the present embodiment. Fig. 4 is a perspective view showing another different angle of the resorbable bone rod in accordance with the present embodiment.

In some examples, an absorbable bone rod 10 of the present disclosure may include a body portion 110 and a protrusion 120 (see fig. 2-4). Wherein the protrusion 120 may be formed on the body 110.

In some examples, the body portion 110 may be integrally molded with the protrusion 120. In this case, the main body portion 110 and the protrusion portion 120 can be inhibited from separating from each other during use of the resorbable bone rod 10, thereby improving the reliability of the resorbable bone rod 10. However, the present invention is not limited to this, and the protrusion 120 is fastened to the main body 110, for example, the protrusion 120 may be formed on the main body 110 by adhesion or the like.

In some examples, the body portion 110 may be substantially cylindrical. For example, in some examples, the body portion 110 may be cylindrical (see fig. 2 and 3). For example, in other examples, the body portion 110 may be generally tapered from one end to the other (not shown). In this case, the main body 110 may use different shapes according to different application scenarios.

In some examples, the body portion 110 may have a proximal end 110a and a distal end 110 b. Wherein proximal end 110a is closer to the damaged bone than distal end 110b in preparation for implantation.

Fig. 5 is a schematic diagram showing the structure of the protrusion 120 according to the present embodiment. Fig. 5(a) and 5(b) may be perspective views of the protrusion 120 from different viewing angles.

In some examples, as described above, the resorbable bone rod 10 may include a protrusion 120 (see fig. 2-5). In some examples, the protrusion 120 may be formed at the outer circumference of the body part 110. In some examples, the protrusion 120 may be integrally formed with the body portion 110. For example, as shown in fig. 4, the protrusion 121 may be formed on the outer periphery of the main body 110, and integrally formed with the main body 110 to form the resorbable bone rod 10.

In some examples, the protrusion 120 may be disposed around the body portion 110 and formed at the outer circumference of the body portion 110. In some examples, the protrusion 120 may be formed substantially in a column shape having a through hole. For example, in some examples, the protrusion 120 may be a truncated cone structure having a through hole 1203 (see fig. 5).

In some examples, the protrusion 120 may have opposing upper and lower surfaces 1201, 1202 (see fig. 5). In some examples, the area of upper surface 1201 may be no greater than the area of lower surface 1202. For example, in some examples, the ratio of the outer diameter of the upper surface 1201 to the outer diameter of the lower surface 1202 is from 1: 1.1 to 1: 1.5. For example, the ratio of the outer diameter of the upper surface 1201 to the outer diameter of the lower surface 1202 is 1: 1.1, 1: 1.2, 1: 1.3, 1: 1.4 or 1: 1.5. In this case, the diameter of the absorbable bone rod 10 can be effectively ensured, thereby reducing the influence on the mechanical properties.

In some examples, upper surface 1201 and lower surface 1202 of protrusion 120 may be smoothly connected. For example, in some examples, the protrusion 120 may be substantially frustoconical. Protrusion 120 may have opposing upper surface 1201 and lower surface 1202. The side surfaces of the protrusion 120 may be arc-shaped. The upper surface 1201 and the lower surface 1202 of the protrusion 120 can be smoothly connected by the side surface. In this case, the resistance of the resorbable bone rod 10 when implanted can be reduced, thereby allowing easier implantation of the resorbable bone rod 10 into the damaged bone 20.

In some examples, the through holes 1203 on the protrusion 120 may be disposed in a direction passing through the upper surface 1201 and the lower surface 1202 (see fig. 5). In some examples, the through hole 1203 in the protrusion 120 may mate with the body portion 110. In this case, the main body 110 may pass through the through hole 1203 such that the protrusion 120 is formed on the outer circumference of the main body 110. For example, in some examples, the protrusion 120 may be an annular structure formed around the outer circumference of the body 110. The side wall of the ring formed by the protrusion 120 may completely conform to the outer circumference of the protrusion 120. That is, the shape and size of the ring formed by the protrusion 120 may be completely the same as the shape and size of the outer circumference of the body 110 at the corresponding portion. This enables the protrusion 120 to be formed more favorably on the outer periphery of the body 110. For example, the shape of the through-hole on the protrusion 120 may be circular. The body 110 may be cylindrical in shape. When the protrusion 120 is formed on the body 110, the hole wall of the through hole of the protrusion 120 may be completely attached to the outer circumference of the protrusion 120.

In some examples, when the protrusion 120 is formed on the outer circumference of the body part 110, the upper surface 1201 of the protrusion 120 may face the proximal end 110a of the body part 110 (see fig. 2 to 5).

In some examples, the number of protrusions 120 may be multiple. In some examples, the plurality of protrusions 120 may be sequentially arranged along the length direction of the body part 110. For example, referring to fig. 4 and 5, the

protrusions

121, 122, 123, etc. may be sequentially arranged along the length direction of the body part 110.

In some examples, the plurality of protrusions 120 may be identical. For example, in some examples, the shape and size of the plurality of protrusions 120 may be the same. The through holes 1203 formed on the plurality of protrusions 120 may be identical. Thus, the absorbable bone rod 10 can be implanted into the bone more easily.

However, examples of the present invention are not limited thereto, and in some examples, the shapes and sizes of the plurality of protrusions 120 may not be identical. For example, the body portion 110 may have a first position thereon. The outer diameter of the protrusion 120 near the proximal end 110a may gradually increase with distance from the proximal end 110a until the outer diameter of the protrusion 120 stops changing to the first position and continues to be aligned along the length of the body 110. That is, between the end surface of the proximal end 110a and the first position, the outer diameter of the protrusion 120 may gradually increase as being away from the end surface of the proximal end 110 a; the outer diameter of the protrusion 120 may remain constant between the first position and the end face of the distal end 110.

In some examples, the plurality of protrusions 120 are continuously formed at the outer circumference of the body part 110. Among them, one protrusion closer to the proximal end 110a may be a first protrusion 1210, and another protrusion farther from the proximal end 110a may be a second protrusion 1220 (see fig. 6) than any adjacent two protrusions among the plurality of protrusions 120.

In some examples, any adjacent protrusions of the plurality of protrusions 120 may contact each other. For example, in some examples, an upper surface of the second projection 1220 can be conformed to a lower surface of the first projection 1210. In this case, a plurality of protrusions 120 may be continuously formed on the outer circumference of the main body 110 in the length direction of the main body 110, and adjacent protrusions may be in contact with each other. Thereby facilitating better fixation of the resorbable bone rod 10 within the bone. However, examples of the present invention are not limited thereto, and in some examples, a gap (not shown) may exist between adjacent protrusions.

In some examples, the upper surface of the second protrusion 1220 may completely conform to the lower surface of the first protrusion 1210 (see region c in fig. 6). In some examples, an upper surface of the second protrusion 1220 may be connected to a lower surface of the first protrusion 1210. For example, in some examples, the second tab 1220 can be integrally formed with the first tab 1210. Still alternatively, the upper surface of the second protrusion 1220 may be connected to the lower surface of the first protrusion 1210 by adhesion.

In some examples, if adjacent protrusions contact each other, a rounded transition may be used between adjacent protrusions. For example, as shown at m in fig. 6, the junction of the first protrusion 1210 and the second protrusion 1220 may adopt a circular arc transition. Therefore, the friction force between the absorbable bone rod 10 and the implanted bone can be increased, and the absorbable bone rod 10 can be better fixed in the bone.

In some examples, if there is a gap between adjacent protrusions, the plurality of protrusions 120 may be uniformly distributed around the outer circumference of the main body 110 along the length direction of the main body 110. For example, in some examples, there may be gaps between adjacent protrusions, and the distance between adjacent protrusions may be equidistant along the length of the body portion 110.

Examples of the present disclosure are not limited thereto, and in some examples, the plurality of protrusions 120 may be randomly distributed on the outer circumference of the body part 110.

Fig. 7 is a partially enlarged view of a portion a in fig. 2 according to the present embodiment. Fig. 8 is a partially enlarged view of a portion B in fig. 3 according to the present embodiment.

In some examples, the plurality of protrusions 120 are continuously formed at the outer circumference of the body part 110. The plurality of protrusions 120 are respectively disposed around the main body 110 and formed at the outer circumference of the main body 110. The plurality of protrusions 120 may be located between an end surface of the proximal side 110a and an end surface of the distal side 110b of the body portion 110 in a length direction of the body portion 110 (see fig. 2 to 4). That is, the protrusion 120 may not protrude from the body 110 in a length direction along the body 110. In this case, the plurality of protrusions 120 may include a first target protrusion 120A (see fig. 7) closest to the end surface of the proximal side 110A of the body portion 110. The plurality of protrusions 120 may include a second target protrusion 120B (see fig. 8) closest to an end surface of the distal side 110B of the body portion 110.

In some examples, the upper surface of the first target protrusion 120A may be flush with the end surface of the proximal side 110A of the body portion 110 (see fig. 7). In some examples, the lower surface of the second target protrusion 120B may be flush with the end surface of the distal side 110B of the body portion 110 (see fig. 8). In this case, if the protrusions 120 are truncated cone structures and the adjacent protrusions are in contact with each other, the resorbable bone rod 10 can be regarded as being formed by a plurality of truncated cone structures in an end-to-end manner. Specifically, the absorbable bone rod 10 may include a plurality of circular truncated cone structures, each of which may include an upper surface and a lower surface, and the plurality of circular truncated cone structures may be sequentially connected to the upper surface and the lower surface to form the absorbable bone rod 10 in a linear arrangement. Therefore, the absorbable bone rod 10 can be better implanted into the bone and can be better fixed in the bone.

In some examples, the corners of the upper surface and the sides of the protrusion 120 may be rounded. For example, in some examples, the corners of the upper surface and the side of the first target protrusion 120A may be rounded (see fig. 7 at n and fig. 4). Therefore, the resistance of the absorbable bone rod 10 during implantation can be reduced, and the absorbable bone rod 10 can be implanted better.

In some examples, the maximum diameter of the resorbable bone rod 10 may be 1mm to 5 mm. For example, the maximum diameter of the resorbable bone rod 10 may be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, or 5mm, etc. In some examples, the outer circumference of the body portion 110 may be formed with a protrusion 120. In this case, the maximum diameter of the resorbable bone rod 10 may be determined by the outer diameter of the protrusion 120. That is, the outer diameter of the protrusion 120 may range from 1mm to 5 mm. In this case, the resorbable bone rod 10 can be selected to have a suitable size, making the resorbable bone rod 10 suitable for different implants into bone.

In some examples, the length of the resorbable bone rod 10 may be 10mm to 100 mm. For example, the length of the resorbable bone rod 10 may be 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, or 100mm, etc. In some examples, the plurality of protrusions 120 are continuously formed at the outer circumference of the body part 110. The plurality of protrusions 120 may be located between an end surface of the proximal side 110a and an end surface of the distal side 110b of the body portion 110 in a direction along the length of the body portion 110. In this case, the length of the resorbable bone rod 10 may be determined by the length of the body portion 120. That is, the length of the body portion 120 may range from 10mm to 100 mm. In this case, the resorbable bone rod 10 can be selected to have a suitable size, making the resorbable bone rod 10 suitable for different implants into bone.

In some examples, the material of the resorbable bone rod 10 may be made of a resorbable material. In some examples, the absorbable material may comprise an absorbable polymer material. In some examples, the absorbable polymer material may be selected from one or more of polylactic acid-based materials, polycaprolactone, polydioxanone, and polyglycolic acid. Or the absorbable polymer material can be selected from one or more of more than two random copolymers or block copolymers among lactide, caprolactone, p-dioxanone and glycolide. In this case, by manufacturing the absorbable bone rod 10 using an absorbable polymer material, not only the occurrence of a secondary operation can be effectively prevented, but also various inconveniences such as the inability to perform nuclear magnetic resonance examination or the occurrence of inflammation such as synovitis, which may be caused by leaving the absorbable bone rod 10 in the body, can be effectively suppressed.

In some examples, the absorbable material may also include inorganic particles. For example, in some examples, the absorbable material may be composed of an absorbable polymer material and inorganic particles. In some examples, the inorganic particles may be selected from one or more of hydroxyapatite, tricalcium phosphate, calcium phosphate, silicates. In this case, the inorganic particles are capable of neutralizing acidic species formed by the degradation of the absorbable polymer material, thereby inhibiting the occurrence of sterile inflammation.

While the present invention has been described in detail in connection with the drawings and the examples, it is to be understood that the above description is not intended to limit the present invention in any way. The present invention may be modified and varied as necessary by those skilled in the art without departing from the true spirit and scope of the invention, and all such modifications and variations are intended to be included within the scope of the invention.

Claims

1. An absorbable bone rod, comprising: a columnar main body part and a plurality of protrusion parts formed on the periphery of the main body part, the body portion having a proximal end and a distal end, the plurality of protrusions being aligned along a length of the body portion, the protruding part is a circular truncated cone structure with a through hole, the circular truncated cone structure is provided with an upper surface and a lower surface opposite to the upper surface, the area of the upper surface is smaller than that of the lower surface, the upper surface of the circular truncated cone structure faces the proximal end of the main body part, the through hole penetrates through the upper surface and the lower surface, the main body part is matched with the through hole, the body portion passes through the through hole such that the protrusion is formed on the outer circumference of the body portion, and the absorbable bone rod is made of absorbable materials, and the absorbable bone rod is integrally formed.

2. The resorbable bone rod of claim 1,

the plurality of protrusions are continuously formed on the outer periphery of the main body, and adjacent protrusions are in contact with each other.

3. The resorbable bone rod of claim 2,

and the adjacent protrusions are in arc transition.

4. The resorbable bone rod of claim 1,

the maximum diameter of the absorbable bone rod is 1mm to 5 mm.

5. The resorbable bone rod of claim 1,

the length of the absorbable bone rod is 10mm to 100 mm.

6. The resorbable bone rod of claim 1,

the shape and size of each protrusion are the same.

7. The resorbable bone rod of claim 1,

the ratio of the outer diameter of the upper surface to the lower surface is from 1: 1.1 to 1: 1.5.

8. The resorbable bone rod of claim 1,

an end surface of the proximal end of the body portion is coplanar with an upper surface of a first target protrusion of the plurality of protrusions.

9. The resorbable bone rod of claim 8,

the upper surface of the first target protrusion and the corner of the side surface are in rounded transition.