Absorbable fixing nail and repairing fixer

Abstract

The utility model provides an absorbable fixing nail and a repairing fixer, which relate to the field of medical instruments, and comprise a spiral body, a connecting rod and a tail part, one end of the connecting rod is connected with the spiral body, the other end of the connecting rod is connected with the tail part, the spiral body spirally surrounds the outer wall of the connecting rod, and the spiral body is not contacted with the tail part; the tail part comprises a base table and driving wings, the driving wings are distributed on the two sides of the base table, and the connecting rod and the base table are each provided with a hollow structure. The hollow structure of the absorbable nail is optimized, the quantity of implants is reduced, stimulation to a body is relieved, two mixed loading methods are adopted, the puncture effect is good, the absorbable nail can be used in a complex fixing environment such as the periphery of a bony structure, and degradation does not affect tissue healing of a repaired part; the absorbable nails made of different materials are loaded through the same repairing fixator, the advantages of the materials are integrated, the application range and flexibility of the repairing fixator are improved, and extra fixing instruments are prevented from being detached.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to an absorbable fixing nail and a repair fixator. Background Art

[0002] Fixing nails made of bioabsorbable polymer materials such as polylactic acid and polyglycolic acid have been used in abdominal and pelvic surgery and hernia repair surgery. Due to their absorbability, non-toxicity and good biocompatibility, they are very popular in the field of biomedical implant materials. Medical bioabsorbable polymer materials still have certain disadvantages. For example, during the degradation process of polylactic acid and polyglycolic acid, the surrounding pH shows a downward trend, and the overly acidic environment in the body has an adverse effect on anti-infection and tissue regeneration. It is known in the prior art that when the pH is too acidic, it will interfere with the function of white blood cells, such as neutrophils and macrophages that play an important role in clearing dead tissue and fighting infection. At the same time, the acidic environment can inactivate enzymes involved in decomposing dead tissue and promoting tissue regeneration.

[0003] In addition, when the fixation material is fixed with nails during hernia repair surgery, when the fixation nails made of bioabsorbable polymers are punctured into tissues with greater hardness, the fixation nails often fail to puncture the expected position due to insufficient hardness of the fixation nails, such as when the repair material is fixed around the anterior superior iliac spine. Similarly, when used with biological patches or composite patches, fixation nails made of bioabsorbable polymers will also encounter such problems. If it is found during the operation that the fixation nails that have not punctured the expected position must be removed, otherwise there is a risk of falling into the abdominal cavity. However, the removal operation is generally difficult because the size of the fixation nails is very small, generally about 5mm, and removal will increase the doctor's operation time. The Chinese Expert Consensus on Suture Techniques and Suture Material Selection for Laparoscopic Hernia and Abdominal Wall Surgery (2021 Edition) mentioned that staple fixation cannot be used near bony structures (such as the anterior superior iliac spine), and sutures can be used to fix and tie part of the peritoneal tissue to the edge of the patch. However, compared with direct use of fixed staple fixation, the suture change fixation operation is complicated and will also prolong the operation time. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide an absorbable fixing nail and a repair fixator.

[0005] According to the utility model, an absorbable fixation nail is provided, comprising a spiral body, a connecting rod and a tail, wherein one end of the connecting rod is connected to the spiral body, and the other end of the connecting rod is connected to the tail, and the spiral body spirally surrounds the outer wall of the connecting rod, and the spiral body does not contact the tail;

[0006] The tail portion includes a base and driving wings, the driving wings are distributed on both sides of the base, and the connecting rod and the base are both provided with a hollow structure.

[0007] Preferably, the cross-section of the hollow structure is circular.

[0008] Preferably, the axis of the hollow structure coincides with the axis of the spiral body, the connecting rod or the base.

[0009] Preferably, the hollow structure of the base includes a first section and a second section, one end of the first section is connected to the hollow structure of the connecting rod, and the other end of the first section is connected to the second section.

[0010] Preferably, the first section is cylindrical, and the second section is truncated cone-shaped.

[0011] Preferably, the axes of the spiral body and the connecting rod coincide with each other, and the spiral body and the connecting rod do not completely coincide with each other in the direction in which the axes extend.

[0012] Preferably, the absorbable fixing nail is made of absorbable metal.

[0013] The utility model also provides a repair fixer, comprising the absorbable fixing nail and a fixing nail launching mechanism, wherein the fixing nail launching mechanism comprises a cylindrical launching chamber, the absorbable fixing nail is sequentially stored in the launching chamber from the far end of the launching chamber, and the absorbable fixing nail is delivered to the far end.

[0014] Preferably, the absorbable fixing nails include absorbable polymer fixing nails that degrade to produce an acidic environment and absorbable metal fixing nails that degrade to produce an alkaline environment.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] (1) The utility model optimizes the hollow structure of the absorbable fixation nail, reduces the amount of implant, and alleviates the stimulation to the body;

[0017] (2) The repair fixator of the utility model mixes absorbable polymer fixation nails that degrade to produce an acidic environment with absorbable metal fixation nails that degrade to produce an alkaline environment, so that the advantages of different materials complement each other. When degrading, the acid and alkali are neutralized, which does not affect the local pH and thus does not affect tissue healing. It also has a good puncture effect and can be used in complex fixation environments such as around bone structures.

[0018] (3) The repair fixator of the present invention combines the advantages of different types of materials by loading absorbable nails of different materials on the same repair fixator, thereby increasing the application scope and flexibility of the repair fixator and avoiding the need to disassemble and use additional fixation devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the absorbable fixation nail of the utility model;

[0021] Figure 2 It is a side view of the absorbable fixation nail of the utility model;

[0022] Figure 3 It is a cross-sectional view of the absorbable fixation nail of the utility model;

[0023] Figure 4 for Figure 3 Sectional view along AA;

[0024] Figure 5 This is a schematic diagram of the absorbable fixation nail structure of Comparative Example 1-2;

[0025] Figure 6 for Figure 5 Sectional view along BB;

[0026] Figure 7 Schematic diagram of absorbable nail fixation repair material.

[0027] The figure shows: a spiral body 1, a connecting rod 2, a tail 3, a base 31, a driving wing 32, a flange 321, and a fan ring column 322. DETAILED DESCRIPTION

[0028] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model. These all belong to the protection scope of the utility model.

[0029] Example 1

[0030] like Figure 1-3 As shown, an absorbable fixation nail provided by the utility model includes a spiral body 1, a connecting rod 2 and a tail 3, the axes of the spiral body 1 and the connecting rod 2 coincide, one end of the connecting rod 2 is connected to the spiral body 1, and the other end of the connecting rod 2 is connected to the tail 3, and the spiral body 1 is spirally wrapped around the outer wall of the connecting rod 2, and the spiral body 1 is not in contact with the tail 3; the tail 3 includes a base 31 and a driving wing 32, the base 31 is cylindrical, and the driving wings 32 are relatively distributed on two sides of the base 31.

[0031] Specifically, Figure 1-2 As shown, in the plane direction perpendicular to the axis of the base 31, the driving wing 32 becomes narrower in the direction of the axis, and the side of the driving wing 32 relative to the axis of the base 31 is arc-shaped, and the two side surfaces of the driving wing 32 in the direction of the axis of the base 31 are planes. The tail 3 includes at least two driving wings 32, and the two oppositely arranged driving wings 32 are centrally symmetrical relative to the center point of the base 31. The driving wing 32 includes a flange 321 and a fan ring column 322, one side of the fan ring column 322 is connected to the side of the base 31, and one end of the other side of the fan ring column 322 is connected to the flange 321, so that the outer side surface of the driving wing 32 has a concave surface. The flange 321 protrudes in the radial direction, and the thickness gradually becomes thinner from the inside to the outside, forming a blade shape, and the radial length of the flange 321 gradually decreases. The beneficial effect is that the thickness of the flange gradually becomes thinner from the inside to the outside and is in the shape of a blade, and the radial length of the flange gradually becomes smaller, and the two oppositely arranged driving wings are centrally symmetrical with respect to the center point of the base, so that the driving wings as a whole form a spiral shape with the spiral body, which can save effort to screw the absorbable fixation nail into the tissue, and the tail has a more streamlined spiral shape, which reduces the material of the absorbable fixation nail and reduces the stimulation to the body. There is no need to make the outer periphery of the base surround the overall spiral to achieve the same or equivalent screw-in effect, and the flange structure makes the absorbable fixation nail have better resistance to pull-out.

[0032] like Figure 4 As shown, the connecting rod 2 and the base 31 are both provided with a hollow structure, the axis of the hollow structure coincides with the axis of the spiral body 1 or the connecting rod 2 or the base 31, and the cross-section of the hollow structure is circular, specifically, the hollow structure is a cylinder. The axis of the hollow structure coincides with the axis of the spiral body 1, so that the absorbable fixing nail is more stable when screwed into the tissue. The hollow structure of the base 31 includes a first section and a second section, one end of the first section is connected to the hollow structure of the connecting rod 2, and the other end of the first section is connected to the second section, and the first section is cylindrical, and the second section is truncated cone-shaped, and the bottom surface of the second section with a larger circular area faces the bottom surface of the base 31. This structure can ensure that the absorbable fixing nail has a stable screw-in force while reducing the material used for the absorbable fixing nail to a greater extent to reduce the irritation to the human body during degradation.

[0033] Specifically, the axis of the hollow structure coincides with the axis of the spiral body 1 , the connecting rod 2 , and the base 31 , so that the absorbable fixation nail is more stable when screwed in.

[0034] The spiral body 1, the connecting rod 2 and the tail 3 are all made of bioabsorbable materials. Preferably, the spiral body 1, the connecting rod 2 and the tail 3 are all made of absorbable metal materials, such as magnesium alloy, zinc alloy, iron alloy. The absorbable metal fixation nail has better puncture force than the absorbable polymer fixation nail, and can be used in complex fixation environments such as around bony structures.

[0035] Optionally, the extended sections of the spiral body 1 and the connecting rod 2 in the axial direction overlap or do not completely overlap. Figure 2 and Figure 4 , the lower section of the spiral body 1 overlaps with the upper section of the connecting rod 2, and the lower section of the spiral body 1 spirally wraps around the outer wall of the upper section of the connecting rod 2. When the absorbable fixing nail is made of absorbable metal, the height of the connecting rod 2 is reduced so that the extended sections of the spiral body 1 and the connecting rod 2 in the axial direction do not completely overlap, which can maintain the good puncture performance of the absorbable fixing nail, while simplifying the material of the absorbable fixing nail to reduce the stimulation to the human body during degradation.

[0036] Medical implants are foreign objects implanted into the human body, and the amount of implants needs to be controlled. Generally speaking, when different amounts of implants of the same material are implanted into the same individual, more implants are more likely to cause more severe inflammatory reactions. This suggests that when designing medical implants, we can optimize the structure to minimize the amount of implants while ensuring the functionality of the implants, so as to reduce the stimulation of foreign objects to the body.

[0037] The absorbable fixing nail of the utility model can be used for fixing hernia repair surgery, fixing soft tissues in abdominal and pelvic surgery, and fixing tissues at bone structures.

[0038] Example 2

[0039] The utility model provides a method for loading absorbable fixation nails in embodiment 1, and the specific operation steps are as follows:

[0040] The absorbable polymer fixation nails that degrade to produce an acidic environment are mixed with the absorbable metal fixation nails that degrade to produce an alkaline environment. The purpose is to maintain the stability of the local tissue pH at the implantation site and not affect the healing of the hernia.

[0041] Alternatively, a number of metal absorbable nails with good puncture performance are preset at loading positions and loaded into the same repair fixator together with other absorbable nails, so that one nail gun can be used for the fixation of complex tissues, such as the fixation of marginal hernias.

[0042] The loading method of absorbable fixation nails of the utility model enables a nail gun to be applicable to the fixation of complex tissues, such as the fixation of marginal hernias. More specifically, in a repair operation, 5-30 nails are generally used on a piece of repair material. If a single material absorbable nail is absorbed, the absorption will inevitably lead to changes in the local pH, thereby affecting the healing of the tissue at the defect site. In this embodiment, the absorbable nails are mixed (absorbable metal fixation nails and absorbable polymer fixation nails are loaded into the same repair fixator in proportion, that is, there are x absorbable polymer fixation nails for every 1 absorbable metal fixation nail, and x is a positive integer). The various nails in the repair fixator are evenly mixed, and the acid and alkali are neutralized during degradation. The proportion is controlled so that the local pH remains stable during the degradation process and does not affect the healing.

[0043] More specifically, a plurality of absorbable polymer fixation nails are first loaded into the same repair fixator for puncturing soft tissues, and then a plurality of absorbable metal fixation nails are loaded for puncturing hard tissues. The order of the two can also be reversed. The number of each nail is marked in advance to remind the doctor and ensure that the absorbable fixation nails are used according to local conditions.

[0044] Bioresorbable materials include absorbable polymer materials and absorbable metal materials. The absorbable polymer materials have low density, low melting point and are easy to process, but the mechanical properties of the materials are poor. The absorbable metal materials inherit the good processability and mechanical properties of traditional metal materials, and are also absorbable, non-toxic and have good biocompatibility. They are very popular in the field of biomedical implant materials. Iron-based metals, zinc-based metals and magnesium-based metals have been widely studied as medical bioresorbable metal implants.

[0045] Normally, when degradable metals such as magnesium alloys, iron alloys, and zinc alloys degrade, hydrogen will be generated. Excessive degradation will cause the local tissue pH to rise. This is because the temperature increase promotes the formation of precipitation products (such as calcium-phosphorus products and magnesium hydroxide), and the cathodic reaction accompanying the dissolution of magnesium, iron, and zinc produces hydroxide ions (OH-). Absorbable polymer fixation nails that degrade to produce an acidic environment include fixation nails made of degradable polymers such as polyglycolic acid (PGA), polylactic acid (PLA), polydioxanone (PDO), polycaprolactone (PCL), polylactic acid-polyglycolic acid copolymer (PLGA) or poly (L-lactic acid-ε-caprolactone) (PLCL) produce carbon dioxide during degradation, which dissolves in water and generates hydrogen ions.

[0046] Among bioabsorbable metal materials, magnesium-based metals have advantages such as excellent biocompatibility and MRI compatibility, but they have disadvantages such as fast degradation rate, hydrogen generation during degradation, and degradation causing an increase in local tissue pH. The advantage of iron-based metals is their excellent mechanical properties, slow degradation, and no hydrogen generation during degradation. Their disadvantage is that they degrade too slowly, limiting their application space. Zinc-based metals have good biocompatibility, a moderate degradation rate (relative to magnesium-based metals and iron-based metals), no hydrogen generation during degradation, and a low melting point. The mechanical properties of zinc-based metals are similar to those of magnesium-based metals. Absorbable polymer fixation nails can reduce pH during degradation. Using fixation nails of different material types at the same site can maintain the stability of local tissue pH at the implant site without affecting tissue healing.

[0047] Assembling different absorbable nails in a repair fixer according to a preset firing sequence can increase the utilization efficiency of the repair fixer while making the properties of different materials produce complementary effects. The assembly method can be that different absorbable nails are assembled into the same repair fixer in a pre-designed order, or different absorbable nails are designed with different replaceable nail magazines. During the operation, the nail magazine can be assembled with the repair fixer according to needs, and can be disassembled, replaced, and repeatedly assembled. For example, absorbable nails made of iron-based metals have excellent puncture performance and can be assembled into the same repair fixer with absorbable nails made of polymer materials. After the patch is flattened, part of it falls around the harder tissue and part falls around the soft tissue. At this time, the same repair fixer can be used, and the absorbable fixation nails made of iron-based metals are used to puncture and fix the harder tissue, and the absorbable fixation nails made of polymer materials are used to puncture and fix the soft tissue. This increases the scope of application and flexibility of the repair fixer and avoids the need to dismantle and use additional fixation devices.

[0048] Example 3

[0049] This embodiment 3 is based on the embodiment 1, using Zn-Cu alloy metal bars, machined into Figure 1 The absorbable fixation pins of the structure shown are cleaned with ethanol and blown dry.

[0050] Example 4

[0051] This embodiment 4 is based on the embodiment 1, using Fe-Mn alloy metal bars, machined into Figure 1 The absorbable staples of the structure shown were cleaned with ethanol and blown dry.

[0052] The absorbable nail of Example 4 was loaded into a repair fixator, which was inserted into the abdominal cavity, and the absorbable nail was implanted around the ribs and ilium of a fresh rabbit corpse. After implantation, the implant and surrounding tissues were collected together to evaluate the immediate fixation effect and pull-out force; the same absorbable nail was implanted into the rabbit Achilles tendon to test the pull-out force.

[0053] The threaded parts of the absorbable nails implanted around the ribs and ilium can be completely embedded in the tissue, and the fixed position is close to the ideal position; the pull-out force of the absorbable nails implanted around the ribs and ilium is not inferior to that of the Achilles tendon.

[0054] Example 5

[0055] In this embodiment 5, a molten polyglycolic acid and polylactic acid copolymer is used and a pigment is added to form a Figure 5-6 An absorbable nail of the structure shown.

[0056] Example 6

[0057] This embodiment 6 is based on the embodiment 1, using Mg-Zn alloy metal bars, machined into Figure 1 The absorbable nail of the structure shown is cleaned with ethanol, blown dry, immersed in 40-70% by mass hydrofluoric acid for 2-12 hours, cleaned with ethanol, and blown dry.

[0058] Example 7

[0059] This embodiment 7 is a method for loading absorbable fixation nails based on embodiment 2, and the specific method is as follows:

[0060] The absorbable nails of Example 6 and Example 5 are installed in the same repair fixture in a quantity ratio of 1:1. The positions of the absorbable nails in the repair fixture are arranged as follows: one absorbable nail of Example 6 is installed for every other absorbable nail of Example 5.

[0061] Example 8

[0062] This embodiment 8 is a method for loading absorbable fixation nails based on embodiment 2, and the specific method is as follows:

[0063] The absorbable nails of Example 6 and Example 5 are installed in the same repair fixture in a quantity ratio of 3:1. The positions of the absorbable nails in the repair fixture are arranged as follows: three absorbable nails of Example 6 are installed for every other absorbable nail of Example 5.

[0064] Example 9

[0065] The utility model provides a repair fixator, comprising the absorbable fixing nail and the fixing nail launching mechanism of embodiment 1, wherein the fixing nail launching mechanism comprises a cylindrical launching chamber, wherein the absorbable fixing nail is sequentially stored in the launching chamber from the far end of the launching chamber, and the absorbable fixing nail is delivered to the far end. The absorbable fixing nail is loaded into the launching chamber according to the loading method of embodiment 7.

[0066] Comparative Example 1

[0067] In this comparative example 1, the metal bar material of the same material as that of Example 3 is used to machine the Figure 5-6 The absorbable fixation pins of the structure shown are cleaned with ethanol and blown dry.

[0068] More specifically, the absorbable nails of Example 3 and Comparative Example 1 were assembled with the repair fixator and sterilized; two pieces of 9×9 cm Parietex TM Optimized Composite Mesh (PCO9X). After the miniature pigs were anesthetized, the absorbable nails of Example 3 were combined with a piece of PCO9X patch and implanted into the left side of their abdominal wall under laparoscopy, and the absorbable nails of Comparative Example 1 were combined with another piece of PCO9X patch and implanted into the right side of their abdominal wall under laparoscopy. The implantation was performed so that an absorbable nail was distributed every 4 cm2 of the patch, that is, 16 nails per patch. The miniature pigs were kept alive for 3 months after implantation, and then the pathology of the tissues around the implants was evaluated.

[0069] Gross anatomical observations showed that the peritoneum at the implantation sites on both sides of the abdominal wall was well integrated with the patch and absorbable nails, but a small amount of adhesion was seen on the right side, and it was impossible to distinguish whether the adhesion occurred on the patch or the absorbable nail. It can be seen that the absorbable nail in Comparative Example 1 is more likely to cause adhesion;

[0070] The histopathological examination evaluated the inflammatory response in the implantation area, and the results showed that the inflammatory response score on the right side was higher than that on the left side, which means that the absorbable nail in Example 1 caused a more severe inflammatory response.

[0071] Comparative Example 2

[0072] This comparative example 2 is a method for loading absorbable fixation nails, and the specific method is as follows:

[0073] A plurality of absorbable nails of Example 6 were loaded into a repair fixture.

[0074] Comparative Example 3

[0075] This comparative example 3 is a method for loading absorbable fixation nails, and the specific method is as follows:

[0076] A plurality of absorbable nails of Example 5 were loaded into a repair fixture.

[0077] More specifically, the repair fixators assembled in Example 7, Example 8, Comparative Example 2, and Comparative Example 3 were sterilized; and four pieces of Parietex PCO9X were prepared. TM Optimized Composite Mesh repair material.

[0078] First, a hernia defect model was created. After anesthesia, the miniature pig was placed in a supine position, and the pig's abdomen was divided into four areas: upper left, lower right, upper right, and lower left. A 2-cm diameter abdominal wall aponeurosis defect was created in each of the four areas (excision of extraperitoneal fat and part of the muscle), and the skin and subcutaneous tissue were sutured after complete hemostasis.

[0079] Two weeks after modeling, hernia repair was performed. After anesthesia, the pigs were anesthetized, the hernia sac was retracted, the hernia ring was closed with sutures, the PCO9X patch was used to cover the defect, and then a repair fixator was used for double-circle fixation. The PCO9X patch was fixed with the repair fixator assembled by Example 7, Example 8, Comparative Example 2 and Comparative Example 3 on the upper left, lower right, upper right and lower left, respectively. Each patch was fixed with 16 absorbable nails. The relative positions of the absorbable nails for fixing the patch refer to Figure 7 The position shown. Considering the defect healing cycle, the animals were killed after 3 months, and the full-thickness tissue samples of the abdominal wall in the repair area were taken (the patch was peeled off during sampling), and the full-thickness normal tissue samples away from the surgical area were taken at the same time. The two ends of the tissue samples were clamped on a universal testing machine for tensile testing until they broke, with a tensile speed of 100 mm / min, and the maximum tensile force was recorded respectively.

[0080] The maximum tensile force of the tissue sample reflects the repair status of the tissue in the hernia defect repair area. The biomechanical results show that the biomechanical strength of the upper left repair area is closer to that of normal tissue, that is, the repair fixture loaded by the method shown in Example 7 is most beneficial to the recovery of the healing tissue.

[0081] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0082] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. An absorbable fixation nail, characterized in that: include: A spiral body (1), a connecting rod (2) and a tail (3), wherein one end of the connecting rod (2) is connected to the spiral body (1), and the other end of the connecting rod is connected to the tail (3), and the spiral body (1) is spirally wound around the outer wall of the connecting rod, and the spiral body (1) and the tail (3) are not in contact; The tail portion (3) comprises a base (31) and driving wings (32), the driving wings (32) are distributed on both sides of the base (31), and the connecting rod (2) and the base (31) are both provided with a hollow structure.

2. The absorbable fixation nail according to claim 1, characterized in that: The cross section of the hollow structure is circular.

3. The absorbable fixation nail according to claim 1, characterized in that: The axis of the hollow structure coincides with the axis of the spiral body (1), the connecting rod (2) or the base (31).

4. The absorbable fixation nail according to claim 1, characterized in that: The hollow structure of the base (31) comprises a first section and a second section, one end of the first section is connected to the hollow structure of the connecting rod, and the other end of the first section is connected to the second section.

5. The absorbable fixation nail according to claim 4, characterized in that: The first section is cylindrical, and the second section is truncated cone-shaped.

6. The absorbable fixation nail according to claim 1, characterized in that: The axes of the spiral body (1) and the connecting rod coincide with each other, but the spiral body (1) and the connecting rod (2) do not completely coincide with each other in the direction in which the axes extend.

7. The absorbable fixation nail according to claim 1, characterized in that: The absorbable fixing nail is made of absorbable metal.

8. A repair fixture, characterized in that: The invention comprises the absorbable fixing nail and the fixing nail launching mechanism according to any one of claims 1 to 7, wherein the fixing nail launching mechanism comprises a cylindrical launching chamber, the absorbable fixing nails are sequentially stored in the launching chamber from the distal end of the launching chamber, and the absorbable fixing nails are delivered to the distal end.

9. The repair fixture according to claim 8, characterized in that: The absorbable fixing nails include absorbable polymer fixing nails that degrade to produce an acidic environment and absorbable metal fixing nails that degrade to produce an alkaline environment.

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