CN107874873B - Stretchable artificial rib with peek coating - Google Patents

Abstract

The invention provides a stretchable artificial rib with peek coating, which includes: a first tensile structure, a second tensile structure and a tensile cavity; one end of the first tensile structure and the second tensile structure is the first The connecting end, the second connecting end, the first stretching structure and the other end of the second stretching structure are respectively built in both ends of the stretching cavity, and can be stretched outwards from the stretching cavity respectively; the first stretching structure , the second stretching structure and the stretching chamber are made of titanium alloy, and the outer surface of the titanium alloy is coated with a peek layer. The invention solves the problem of human body poisoning caused by using titanium alloy for artificial ribs in the prior art. It can make human bones and materials well combined. The peek material itself has good biocompatibility and will not cause rejection or other adverse reactions with the human body.

Description

A stretchable artificial rib with peek coating

Technical field

The present invention relates to the technical field of artificial bone, and in particular to a stretchable artificial rib with peek coating.

Background technique

Defects in existing artificial ribs are mostly repaired by titanium alloy mesh plates. Titanium alloy mesh plates have the characteristics of high strength, non-toxicity, and good biocompatibility with the human body. However, because titanium alloy mesh plates are a metal material, , Scientific research has found that titanium alloy mesh plates will undergo electrochemical reactions when placed in the human body, resulting in electrochemical corrosion. Long-term exposure in the human body will cause the tissues around the titanium alloy mesh plates to blacken and even cause necrosis. Long-term implantation is extremely harmful to the human body.

Contents of the invention

The present invention provides a stretchable artificial rib with peek coating to overcome the above technical problems.

A stretchable artificial rib with peek coating of the present invention, including:

a first tensile structure, a second tensile structure and a tensile chamber;

One end of the first tensile structure is a first connecting end, and one end of the second tensile structure is a second connecting end. The other ends of the first tensile structure and the second tensile structure are respectively built in the The two ends of the stretching cavity can be stretched outwards from the stretching cavity respectively;

A pull-out track is provided inside the stretching cavity. Limiting teeth are provided on both sides of one end of the first stretching structure and the second stretching structure placed in the stretching cavity. Both sides of the track Limiting structures matching the limiting teeth are respectively provided. The angle between the inclined surface of the limiting teeth and the stretching direction is greater than 90 degrees. The middle portions of the first stretching structure and the second stretching structure correspond to each other. A through slot is provided at the position of the limiting tooth;

The first stretching structure, the second stretching structure and the stretching chamber are made of titanium alloy, and the outer surface of the titanium alloy is coated with a peek layer.

Further, the peek layer includes: a base layer covering the surface of the titanium alloy and a surface layer disposed on the base layer, and the surface layer is an uneven honeycomb structure with equal intervals.

Further, a first limiting block is provided at the front end of the slot corresponding to the first limiting tooth of the first stretching structure and the second stretching structure in the stretching direction, and the two ends of the stretching chamber are provided with a first limiting block corresponding to the first limiting tooth. The first limiting block matches the second limiting block.

Further, the width of the first limiting block is smaller than the width of the through slot, and first side through slots and second side through slots are provided on both sides of the first limiting block. The total width of the side channel, the second side channel and the first limiting block is equal to the channel, and the length of the first side channel and the second side channel is greater than The length of the first limiting block, the tops of the first side through-slot and the second side through-slot are provided with round holes, the first side through-slot and the second side through-slot Peek material is injected inside.

Further, the limiting teeth are right-angled triangular teeth, and the limiting structure is a double inverted tooth raised on the track or a slot embedded in the track.

Further, the height of the limiting teeth decreases along the stretching direction, and the distance between the through groove and the edges of the first tensile structure and the second tensile structure decreases along the stretching direction.

Further, a closed ring is provided at the connection between the stretching chamber, the first stretching structure and the second stretching structure. One end of the closing ring is engaged with the stretching chamber, and the other end is provided with a reinforcing ring. .

The invention solves the problem of human body poisoning caused by using titanium alloy for artificial ribs in the prior art. It can make human bones and materials well combined. The peek material itself has good biocompatibility and will not cause rejection or other adverse reactions with the human body.

Description of the drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting any creative effort.

Figure 1 is a schematic structural diagram of a stretchable artificial rib with peek coating according to the present invention;

Figure 2 is a schematic structural diagram of the closed ring of the present invention;

Figure 3 is a partial enlarged cross-sectional view of position A in Figure 2;

Figure 4 is another partial enlarged cross-sectional view of position A in Figure 2;

Figure 5 is a schematic structural diagram of the limiting block of the present invention;

Figure 6 is a partial enlarged cross-sectional view of position A in Figure 2;

Figure 7 is a schematic diagram of the honeycomb structure of the Peek coating of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

Figure 1 is a schematic structural diagram of a stretchable artificial rib with peek coating according to the present invention. As shown in Figure 1, the stretchable artificial rib of this embodiment may include:

The first stretching structure 1, the second stretching structure 2 and the stretching chamber 3;

One end of the first tensile structure 1 is a first connecting end, one end of the second tensile structure 2 is a second connecting end, and the other ends of the first tensile structure 1 and the second tensile structure 2 They are respectively built into both ends of the stretching chamber 3 and can be stretched outwards from the stretching chamber 3 respectively;

A pull-out track is provided inside the stretching cavity 3, and limited teeth 5 are provided on both sides of one end of the first stretching structure 1 and the second stretching structure 2 placed in the stretching cavity 3, so Limiting structures matching the limiting teeth 5 are respectively provided on both sides of the track. The angle between the slope of the limiting teeth 5 and the stretching direction is greater than 90 degrees. The first tensile structure 1 and A through-slot 13 is provided in the middle of the second tensile structure 2 corresponding to the position of the limiting tooth 5;

The first stretching structure, the second stretching structure and the stretching chamber are made of titanium alloy, and the outer surface of the titanium alloy is coated with a peek layer.

Specifically, the artificial rib of this embodiment includes three parts: a first tensile structure 1, a second tensile structure 2, and a tensile cavity 3. One ends of the first tensile structure 1 and the second tensile structure 2 respectively It is built into both ends of the stretching chamber 3 and can be stretched outward from the inside of the stretching chamber 3 . The other ends of the first tensile structure 1 and the second tensile structure 2 are respectively the first connecting end and the second connecting end. When the artificial rib of this embodiment is placed laterally in the chest cavity, the first connecting end can be connected to the vertebrae, and the second connecting end can be connected to the sternum. Alternatively, the first connecting end is connected to the sternum, and the second connecting end is connected to the vertebrae. There is no limit to this. When the artificial rib of this embodiment is placed longitudinally in the chest cavity, the first connecting end and the second connecting end can connect to other ribs in the up and down direction. The angle between the slope of the limiting tooth 5 and the stretching direction is greater than 90 degrees, which reduces the relative distance between the first tensile structure 1 or the second tensile structure 2 and the limiting structures on both sides of the track when it is pulled out. resistance.

The first stretching structure 1 and the first stretching structure 2 can be on the same horizontal plane. In order to shorten the length of the stretching cavity 3, the first stretching structure 1 and the second stretching structure 2 can also be located in the stretching cavity 3. There are two floors up and down. Each part of the structure of the artificial rib in this embodiment is sprayed with a Peek layer on the outer surface of titanium alloy. Peek has self-lubricating properties, good biocompatibility, and its elastic modulus is the same as that of human bone. It can adjust the elastic modulus of artificial bone made of titanium alloy to better match the elastic modulus of human bones, and has toughness and high strength.

As shown in Figure 7, further, the peek layer includes: a base layer covering the surface of the titanium alloy and a surface layer disposed on the base layer. The surface layer is an uneven honeycomb structure 19 with equal spacing.

Specifically, in this embodiment, the base layer of the peek layer completely covers the surface of the titanium alloy. To compensate for the large difference in elastic modulus of artificial bone made from titanium alloy compared with human bones, problems such as stress shielding, bone absorption, and bone inflammation may occur after implantation into the human body. The surface layer above this is an uneven honeycomb structure with equal intervals. The honeycomb structure specifically has a wavy surface in each column or row during the 3D printing process, and the difference between adjacent rows or columns is 1/2 the crest. By analogy, the surface layer forms an uneven honeycomb structure 19 with equal spacing. It is conducive to the climbing and growth of surrounding tissues.

As shown in Figure 5, a first limiting block 9 is provided at the front end of the through groove 13 corresponding to the first limiting tooth of the first tensile structure 1 and the second tensile structure 2 in the stretching direction. Second limiting blocks 12 matching the first limiting blocks 9 are provided at both ends of the cavity 3 .

Specifically, when the first tensile structure 1 and the second tensile structure 2 are stretched outward to the front end of the limiting teeth under the action of external force, in order to prevent the limiting teeth from extending out of the stretching cavity 3 and causing damage to human tissue , a first limiting block 9 is provided at the front end of the stretching structure channel 13, and a second limiting block 12 is provided at both ends of the stretching cavity 3. The second limiting block 12 matches the first limiting block 9 and blocks the tensile structure from continuing to stretch outward. The first limiting block 9 can be provided at the top of the tensile structure, or at the bottom of the tensile structure, or at the top and bottom at the same time. The second limiting block 12 is provided at the top, bottom or both of the top and the bottom of the stretching chamber 3 according to the position of the first limiting block 9 .

As shown in Figure 4, the width of the first limiting block 9 is smaller than the width of the through slot 13. A first side through slot 7 and a second side through slot are provided on both sides of the first limiting block 9. Groove 9, the total width of the first side through groove 7, the second side through groove 8 and the first limiting block 9 is equal to the through groove 13, the first side through groove 7 and the length of the second side slot 8 is greater than the length of the first limiting block 9, and a round hole 18 is provided at the top of the first side slot 7 and the second side slot 8 , peek material is injected into the first side through groove 7 and the second side through groove 8 .

Specifically, the total width of the first limiting block 9 and the first side through groove 7 and the second side through groove 8 on both sides of the first limiting block 9 in this embodiment is equal to the width of the through groove 13 . Due to the outward stretching movement of the first tensile structure 1 and the second tensile structure 2, the through groove 13 is subjected to the inward stress of the limiting teeth 5 . The round holes 18 at the tops of the first side channel 7 and the second side channel 8 disperse the stress at the ends of the channel 13 . Prevent the first tensile structure 1 and the second tensile structure 2 from splitting under the action of stress. Peek material is injected into the first side channel 7 and the second side channel 8. Since the peek material has elasticity, the impact force of the first limiting block 9 and the second limiting block 12 is buffered. This prevents secondary damage to human tissue caused by damage to the artificial ribs.

Furthermore, the height of the limiting teeth 5 gradually decreases along the stretching direction, and the distance between the through groove 13 and the edges of the first tensile structure 1 and the second tensile structure 2 decreases along the stretching direction. Small.

Specifically, as the body grows, the stiffness of the bones increases. The outward tensile stress of the first tensile structure 1 and the second tensile structure 2 also gradually increases. Therefore, the height of the limiting teeth 5 gradually decreases along the stretching direction. That is, the innermost limiting tooth has the largest height. Correspondingly, the height of the limiting teeth increases, and the stress of the limiting teeth on the tensile structure also increases. Therefore, the distance between the through groove 13 and the edges of the first tensile structure 1 and the second tensile structure 2 decreases along the tensile direction. This change in height and distance further adapts to the human body production process and extends the service life of the artificial rib.

As shown in Figures 3 and 4, further, the limiting teeth 5 are right-angled triangle teeth, and the limiting structure is a double inverted tooth 6 raised on the track or a clip embedded in the track. slot 10.

Specifically, the first tensile structure 1 and the second tensile structure 2 of the artificial rib in this embodiment complete bidirectional stretching through the pull-out track provided inside the stretching cavity 3 . One end of the first tensile structure 1 and the second tensile structure 2 placed in the stretching cavity 3 is provided with limiting teeth 5. As shown in Figure 3, the limiting teeth 5 are triangular teeth. The structure is double inverted teeth 6 opposite to the limiting teeth 5; as shown in Figure 4, the limiting teeth 5 are triangular teeth, and the limiting structure can also be inverted to the limiting teeth 5. card slot 10. The limiting teeth can also be of other shapes. When the first tensile structure 1 and the second tensile structure 2 are stretched outward from the inside of the stretching chamber 3, they are limited by the through grooves 13 provided inside the first tensile structure 1 and the second tensile structure 2. The tooth 5 deforms inward and moves outward to the position of the limiting structure, which prevents reverse movement.

Further, as shown in Figure 2, a closed ring 11 is provided at the connection point between the stretching chamber 3 and the first stretching structure 1 and the second stretching structure 2. One end of the closing ring 11 is connected to the The stretching cavity is snap-connected, and a reinforcing ring is set at the other end.

Specifically, as shown in Figure 6, in this embodiment, a closed ring 11 is provided at the connection between the stretching chamber 3 and the first stretching structure 1 and the second stretching structure 2. This closing ring 11 can prevent tissue ingrowth. Stretch cavity. As a result, the first tensile structure 1 and the second tensile structure 2 cannot be stretched outward. One end of the closed ring 11 and the stretching chamber 3 can be an annular structure or a zigzag structure. The closed ring 11 is provided with sawtooth 15 and the stretching chamber 3 is provided with a slot that matches the shape of the sawtooth. 16. A reinforcing ring 14 is provided at the other end to further strengthen the sealing between the closed ring 11 and the tensile structure.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention. scope.

Claims (4)

1. A stretchable artificial rib with a peek coating, comprising:

a first stretching structure, a second stretching structure, and a stretching chamber;

one end of the first stretching structure is a first connecting end, one end of the second stretching structure is a second connecting end, and the other ends of the first stretching structure and the second stretching structure are respectively arranged at two ends of the stretching cavity and can be respectively stretched outwards from the stretching cavity;

the front end of the through groove corresponding to the first limit tooth of the first stretching structure and the second stretching structure in the stretching direction is provided with a first limit block, two ends of the stretching cavity are provided with a second limit block matched with the first limit block, the width of the first limit block is smaller than that of the through groove, two sides of the first limit block are provided with a first side through groove and a second side through groove, the total width of the first side through groove, the second side through groove and the first limiting block is equal to that of the through groove, the lengths of the first side through groove and the second side through groove are larger than that of the first limiting block, round holes are formed in the tops of the first side through groove and the second side through groove, and the peek material is injected into the first side through groove and the second side through groove;

the drawing type rail is arranged in the drawing cavity, limiting teeth are arranged on two sides of one end, which is arranged in the drawing cavity, of the first drawing structure and the second drawing structure, limiting structures matched with the limiting teeth are respectively arranged on two sides of the rail, an included angle between an inclined plane of each limiting tooth and the drawing direction is larger than 90 degrees, and through grooves are formed in the middle parts of the first drawing structure and the second drawing structure, which correspond to the positions of the limiting teeth;

the first stretching structure, the second stretching structure and the stretching cavity are made of titanium alloy, and a peek layer is coated on the outer surface of the titanium alloy; the tensile chamber with the junction of first tensile structure the tensile structure of second sets up the closed loop, closed loop one end with tensile chamber joint, the other end sets up the stiffening ring.

2. The stretchable artificial rib with a peek coating according to claim 1, wherein the peek layer comprises: the titanium alloy comprises a base layer and a surface layer, wherein the base layer is covered on the surface of the titanium alloy, the surface layer is arranged on the base layer, and the surface layer is of an equidistant rugged honeycomb structure.

3. The stretchable artificial rib with a peek coating according to claim 1, wherein the limiting teeth are right triangle teeth, and the limiting structure is a double inverted tooth protruding from the track or a clamping groove embedded in the track.

4. The stretchable artificial rib with the peek coating according to claim 1, wherein the height of the limiting teeth is gradually decreased along the stretching direction, and the distance between the through groove and the edges of the first stretching structure and the second stretching structure is decreased along the stretching direction.