A high-density surface compression fixation trauma orthopedic implant

Abstract

The present invention relates to the technical field of orthopedic implants, and in particular to a high-density surface pressurized fixed trauma-type orthopedic implant, comprising a main nail, a fixing mechanism is arranged inside the upper side of the main nail, a tension nail mechanism is arranged in the middle of the main nail, the lower part of the fixing mechanism is arranged on the upper part of the tension nail mechanism, and a distal nail is arranged in the middle and lower part of the main nail. The tension nail mechanism comprises a nail head, a connecting tube, a limiting tube, an outer sleeve, a limiting assembly and a rotating assembly. One end of the nail head is fixedly connected to one end of the connecting tube, and the other end of the connecting tube is fixedly connected to one end of the limiting tube. The present invention can effectively prevent loosening between threads through the elastic force of the elastic sheet, improve the stability of the tension nail mechanism, assist the healing of the fracture site, and reduce the time of fracture healing. By rotating the rotating assembly, the limiting tube drives the connecting tube to move toward the outer sleeve, the length of the tension nail mechanism can be adjusted, and it can be used flexibly.

Description

Technical Field

[0001] The invention relates to the technical field of orthopedic implants, and in particular to a high-density surface pressurized fixed traumatic orthopedic implant. Background Art

[0002] Orthopedic implants are necessary medical consumables for surgical treatment of such bone trauma and joint diseases. Orthopedic implants are generally used to replace and support missing and damaged bones and joints. These implants play an important auxiliary role in correction, fixation of body posture, and restoration of normal bone function. Orthopedic implants can be divided into trauma implants, spinal replacement implants, bone joint implants, dental implants, bone active biological implants, etc. Traumatic implants include: bone plates, bone screws, intramedullary nails, external fixators, etc.

[0003] Femoral intramedullary nailing is the preferred treatment option for intertrochanteric fusion of femoral shaft. Usually, the femoral intramedullary nail is composed of a main nail, a lag screw, a locking nail, and a cap. It is a common problem that the fracture site cannot be pressurized into place after the lag screw is implanted during surgery. In addition, the strong fixation and free sliding state of the lag screw and the main nail after surgery have negative effects. In particular, the fracture site cannot be pressurized into place, which is prone to loosening and prolongs the healing time. At the same time, most of the current intramedullary nails are not easy to adjust, and the length of the implant cannot be adjusted according to the needs of use, and the flexibility of use is low. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a high-density surface pressurized fixation trauma orthopedic implant.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a high-density surface pressurized fixation trauma orthopedic implant, comprising a main nail, a fixing mechanism is arranged inside the upper side of the main nail, a tension nail mechanism is arranged in the middle of the main nail, the lower part of the fixing mechanism is arranged on the upper part of the tension nail mechanism, and a distal nail is arranged in the lower middle part of the main nail.

[0006] Preferably, the tension nail mechanism includes a nail head, a connecting tube, a limiting tube, an outer sleeve, a limiting assembly and a rotating assembly, one end of the nail head is fixedly connected to one end of the connecting tube, the other end of the connecting tube is fixedly connected to one end of the limiting tube, the other end of the limiting tube is arranged at one end of the rotating assembly, the other end of the rotating assembly is connected to one end of the outer sleeve, and the outer periphery of the limiting tube is slidably connected to the inside of the outer sleeve through the limiting assembly.

[0007] Preferably, the limiting assembly includes limiting groove 2 and limiting block 1, the limiting groove 2 is opened on the outer periphery of the limiting tube, one side of the limiting block 1 is fixedly connected to the inside of the outer sleeve away from one end of the rotating assembly, and the outer periphery of the limiting block 1 is slidably connected to the inside of the limiting groove 2.

[0008] Preferably, the rotating assembly includes a connecting seat, a knob, a threaded tube, an elastic sheet and a connecting ring, one side of the knob is rotatably connected to one end of the connecting seat, the other end of the connecting seat is internally rotatably connected to the outer periphery of an end of the outer sleeve away from the nail head, one end of the threaded tube is fixedly connected to one end of the elastic sheet, the other end of the elastic sheet is fixedly connected to one side of the connecting ring, the other side of the connecting ring is fixedly connected to the side end of the knob close to the connecting seat, and the outer periphery of the threaded tube is threadedly connected to the inside of the limiting tube.

[0009] Preferably, a grouting hole is provided at one end of the nail head away from the connecting pipe, and the grouting hole is communicated with the connecting pipe.

[0010] Preferably, the fixing mechanism includes a sealing cover, an elastic component, a limit seat, a clamping block, a limit block three and a limit groove three, one side of the limit block three is fixedly connected to the inner side wall of the upper and middle part of the main nail, the limit groove three is arranged on the outer surface of the limit seat, the outer periphery of the limit block three is slidably connected to the inside of the limit groove three, the lower end of the elastic component is arranged in the middle of the limit seat, the upper end of the elastic component is arranged in the lower part of the sealing cover, the outer periphery of the lower part of the sealing cover is arranged on the upper part of the main nail, the upper part of the clamping block is fixedly connected to the lower part of the limit seat, the threaded groove is arranged in the middle of the outer sleeve, the lower surface of the clamping block is provided with a tooth groove that fits the threaded groove, and the lower part of the limit seat is arranged on the upper part of the outer sleeve.

[0011] Preferably, the elastic component includes an upper cover, a spring and a fixed tube, the lower periphery of the upper cover is slidably connected to the inside of the fixed tube, the lower end of the spring is fixedly connected to the inner bottom wall of the fixed tube, the upper end of the spring is fixedly connected to the inner top wall of the upper cover, the upper part of the upper cover is arranged at the lower part of the sealing cover, and the lower part of the fixed tube is arranged at the upper part of the limit seat.

[0012] Preferably, a limiting groove 1 is provided on the left and right sides of the outer sleeve, and a limiting block 2 is provided on the inner walls on the left and right sides of the upper and middle part of the main nail, and the outer periphery of the limiting block 2 is slidably connected to the inside of the limiting groove 1.

[0013] Preferably, the outer surfaces of the main nail, the tension nail mechanism, the fixing mechanism and the distal nail are all provided with a hydroxyapatite coating.

[0014] Preferably, a notch is provided at the bottom of the main nail.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When the bones at the fracture site are close to each other, continue to turn the knob to compress the elastic sheet. The elastic force of the elastic sheet can effectively prevent the loosening between the threads, improve the stability of the tension nail mechanism, assist the healing of the fracture site, and reduce the time of fracture healing.

[0017] 2. By rotating the rotating assembly, the limit tube drives the connecting tube to move toward the outer sleeve, and the length of the tension nail mechanism can be adjusted, which can be used flexibly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of a high-density surface pressurized fixation trauma orthopedic implant of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a tension nail mechanism for pressurized fixation of traumatic orthopedic implants with high surface density according to the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of a limiting tube for a high-density surface pressurized fixation traumatic orthopedic implant according to the present invention;

[0021] Figure 4 This is a schematic diagram of the outer sleeve structure of a high-density surface pressurized fixation traumatic orthopedic implant of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of a threaded tube for a high-density surface pressurized fixation traumatic orthopedic implant according to the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of an elastic sheet of a high-density surface pressurized fixation traumatic orthopedic implant according to the present invention;

[0024] Figure 7 This is a schematic diagram of the fixing mechanism structure of a high-density surface pressurized fixation traumatic orthopedic implant of the present invention;

[0025] Figure 8 The figure is a schematic diagram of the internal structure of an elastic component of a high-density surface pressurized fixation traumatic orthopedic implant according to the present invention.

[0026] In the figure: 1. main nail; 2. tension nail mechanism; 2001. nail head; 2002. connecting pipe; 2003. limiting pipe; 2004. threaded groove; 2005. connecting seat; 2006. knob; 2007. limiting groove one; 2008. limiting groove two; 2009. outer sleeve; 2010. grouting hole; 2011. limiting block one; 2012. threaded pipe; 2013. elastic sheet; 2014. connecting ring; 2015. limiting block two; 3. fixing mechanism; 301. sealing cover; 302. elastic component; 3021. upper cover; 3022. spring; 3023. fixing pipe; 303. limiting seat; 304. block; 305. limiting block three; 306. limiting groove three; 4. distal nail; 5. notch. DETAILED DESCRIPTION

[0027] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0028] like Figure 1-Figure 8 The illustrated embodiment of a high-density surface pressure-fixed trauma orthopedic implant comprises a main nail 1, a fixing mechanism 3 is arranged inside the upper side of the main nail 1, a tension nail mechanism 2 is arranged in the middle of the main nail 1, the lower part of the fixing mechanism 3 is arranged on the upper part of the tension nail mechanism 2, and a distal nail 4 is arranged in the lower part of the main nail 1. In summary, firstly align the limiting groove 1 2007 with the limiting block 2 2015, then pass the tension nail mechanism 2 through the main nail 1, and install the tension nail mechanism 2 and the main nail 1 to the fracture site, and then align the limiting block 3 305 with the limiting groove 3 30 6, and put the limit seat 303 on the upper part of the main nail 1, and make the limit seat 303 slide up and down on the outer periphery of the limit block 305 through the limit groove 306, finally put the elastic component 302 and install the sealing cover 301, make the lower surface of the block 304 contact with the upper surface of the outer sleeve 2009 through the elastic component 302, fix the outer sleeve 2009 on the middle and upper part of the main nail 1 through the thread groove 2004 and the tooth groove, and turn the knob 2006 to drive the connecting ring 2014 and the elastic sheet 2013 to move. The threaded tube 2012 rotates synchronously. Since the outer thread of the threaded tube 2012 is connected to the inside of the limiting tube 2003, the limiting block 1 2011 slides inside the limiting groove 2008, and the limiting block 1 2011 is fixed on the left and right sides of the outer sleeve 2009, and the limiting groove 2008 is opened on the left and right sides of the limiting tube 2003, so that the limiting tube 2003 drives the connecting tube 2002 to move toward the outer sleeve 2009, thereby pulling the bones of the fracture site closer to assist the healing of the fracture site. When the bones are close to each other, the limiting tube 2003 cannot move inside the outer sleeve 2009. Then, the knob 2006 is continuously rotated to compress the elastic sheet 2013. The elastic force of the elastic sheet 2013 increases the friction between the threaded tube 2012 and the limiting tube 2003. The friction between the connecting seat 2005, the knob 2006 and the outer sleeve 2009 increases, which can effectively prevent the loosening of the threads, improve the stability of the tension nail mechanism 2, assist the healing of the fracture site, and reduce the time of fracture healing.

[0029] The tension nail mechanism 2 includes a nail head 2001, a connecting tube 2002, a limiting tube 2003, an outer sleeve 2009, a limiting assembly and a rotating assembly. One end of the nail head 2001 is fixedly connected to one end of the connecting tube 2002, and the other end of the connecting tube 2002 is fixedly connected to one end of the limiting tube 2003. The other end of the limiting tube 2003 is arranged at one end of the rotating assembly, and the other end of the rotating assembly is connected to one end of the outer sleeve 2009. The outer periphery of the limiting tube 2003 is slidably connected to the inside of the outer sleeve 2009 through the limiting assembly. The limiting tube 2003 can only move horizontally inside the outer sleeve 2009 through the limiting assembly and cannot rotate. Therefore, by rotating the rotating assembly, the limiting tube 2003 drives the connecting tube 2002 to move toward the outer sleeve 2009, thereby pulling the bones of the fracture site closer, assisting the healing of the fracture site, and reducing the time of fracture healing. In addition, the length of the tension nail mechanism 2 can be adjusted, and it can be used flexibly.

[0030] The limiting assembly includes a limiting groove 2008 and a limiting block 1 2011. The limiting groove 2008 is opened on the outer periphery of the limiting tube 2003. One side of the limiting block 1 2011 is fixedly connected to the inner side of the outer sleeve 2009 away from the end of the rotating assembly. The outer periphery of the limiting block 1 2011 is slidably connected to the inner side of the limiting groove 2008. Since the limiting block 1 2011 slides inside the limiting groove 2008, and the limiting block 1 2011 is fixed on the left and right sides of the inner side of the outer sleeve 2009, the limiting groove 2008 is opened. It is arranged on the left and right sides of the limiting tube 2003, therefore, the limiting tube 2003 can only move horizontally inside the outer sleeve 2009 and cannot rotate. The limiting assembly enables the limiting tube 2003 to only move horizontally inside the outer sleeve 2009 and cannot rotate. Therefore, by rotating the rotating assembly, the limiting tube 2003 drives the connecting tube 2002 to move toward the outer sleeve 2009, thereby pulling the bones of the fracture site closer, assisting the healing of the fracture site, and reducing the time of fracture healing.

[0031] The rotating assembly includes a connecting seat 2005, a knob 2006, a threaded tube 2012, an elastic sheet 2013 and a connecting ring 2014. One side of the knob 2006 is rotatably connected to one end of the connecting seat 2005, and the other end of the connecting seat 2005 is internally rotatably connected to the outer periphery of one end of the outer sleeve 2009 away from the nail head 2001. One end of the threaded tube 2012 is fixedly connected to one end of the elastic sheet 2013, and the other end of the elastic sheet 2013 is fixedly connected to one side of the connecting ring 2014. The other side of the connecting ring 2014 is fixedly connected to the side end of the knob 2006 close to the connecting seat 2005. The outer periphery of the threaded tube 2012 is threadedly connected to the inside of the limiting tube 2003. By rotating the knob 2006, the connecting ring 2014 and the elastic sheet 2013 drive the threaded tube 2012 to rotate synchronously. Since the outer periphery of the threaded tube 2012 is threadedly connected to the inside of the limiting tube 2003, the limiting block 211 is The limiting block 2011 slides inside the limiting groove 2008, and the limiting block 2011 is fixed on the left and right sides of the outer sleeve 2009. The limiting groove 2008 is opened on the left and right sides of the limiting tube 2003, so that the limiting tube 2003 drives the connecting tube 2002 to move toward the outer sleeve 2009, thereby pulling the bones at the fracture site closer and assisting the healing of the fracture site. When the bones at the fracture site are close to each other, the limiting tube 2003 cannot move inside the outer sleeve 2009. Then, the knob 2006 is continuously rotated to compress the elastic sheet 2013. The elastic force of the elastic sheet 2013 increases the friction between the threaded tube 2012 and the limiting tube 2003, and the friction between the connecting seat 2005, the knob 2006 and the outer sleeve 2009 increases, which can effectively prevent the loosening between the threads, improve the stability of the tension nail mechanism 2, assist the healing of the fracture site, and reduce the time of fracture healing.

[0032] A grouting hole 2010 is provided at one end of the nail head 2001 away from the connecting tube 2002. The grouting hole 2010 is connected with the connecting tube 2002. The nail head 2001, the connecting tube 2002, the limiting tube 2003, the knob 2006 and the threaded tube 2012 are connected with each other. By injecting bone cement into the threaded tube 2012, the bone cement can enter the fracture site through the grouting hole 2010, thereby improving the strength of the fracture site.

[0033] The fixing mechanism 3 includes a sealing cover 301, an elastic component 302, a limiting seat 303, a clamping block 304, a limiting block 305 and a limiting groove 306. One side of the limiting block 305 is fixedly connected to the inner wall of the upper middle part of the main nail 1, the limiting groove 306 is arranged on the outer surface of the limiting seat 303, the outer periphery of the limiting block 305 is slidably connected to the inside of the limiting groove 306, the lower end of the elastic component 302 is arranged in the middle of the limiting seat 303, the upper end of the elastic component 302 is arranged at the lower part of the sealing cover 301, the outer periphery of the lower part of the sealing cover 301 is arranged on the upper part of the main nail 1, the upper part of the clamping block 304 is fixedly connected to the lower part of the limiting seat 303, and the threaded groove 2004 is arranged in the middle of the outer sleeve 2009. The lower surface of the block 304 is provided with a tooth groove that fits with the thread groove 2004, and the lower part of the limit seat 303 is arranged on the upper part of the outer sleeve 2009. When the main nail 1 and the tension nail mechanism 2 are installed, the limit block three 305 is aligned with the limit groove three 306, and the limit seat 303 is placed on the upper part of the main nail 1, and the limit seat 303 slides up and down on the outer periphery of the limit block three 305 through the limit groove three 306. Finally, the elastic component 302 is inserted and the sealing cover 301 is installed. The lower surface of the block 304 is in contact with the upper surface of the outer sleeve 2009 through the elastic component 302, and the outer sleeve 2009 is fixed to the upper middle part of the main nail 1 through the thread groove 2004 and the tooth groove.

[0034] The elastic component 302 includes an upper cover 3021, a spring 3022 and a fixed tube 3023. The lower periphery of the upper cover 3021 is slidably connected to the inside of the fixed tube 3023. The lower end of the spring 3022 is fixedly connected to the inner bottom wall of the fixed tube 3023. The upper end of the spring 3022 is fixedly connected to the inner top wall of the upper cover 3021. The upper part of the upper cover 3021 is arranged at the lower part of the sealing cover 301, and the lower part of the fixed tube 3023 is arranged at the upper part of the limit seat 303. The spring 3022 is protected by the upper cover 3021 and the fixed tube 3023. The lower surface of the block 304 is in contact with the upper surface of the outer sleeve 2009 through the elastic component 302. The outer sleeve 2009 is fixed to the upper middle part of the main nail 1 through the threaded groove 2004 and the tooth groove.

[0035] Limiting grooves 2007 are arranged on the left and right sides of the outer sleeve 2009, and limiting blocks 2015 are arranged on the inner walls on the left and right sides of the upper and middle parts of the main nail 1. The outer periphery of the limiting block 2015 is slidably connected to the inside of the limiting groove 2007. Since the limiting groove 2007 is arranged on the left and right sides of the outer sleeve 2009, the limiting block 2015 is fixed to the inner wall of the main nail 1, and the limiting block 2015 slides in the limiting groove 2007, so that the outer sleeve 2009 can only move left and right, and the tension nail mechanism 2 can be fixed to the main nail 1 through the fixing mechanism 3 to prevent shaking.

[0036] The outer surfaces of the main nail 1, the tension nail mechanism 2, the fixing mechanism 3 and the distal nail 4 are all provided with a hydroxyapatite coating. The hydroxyapatite coating refers to a hard tissue implant material prepared by using a titanium alloy as a substrate and coating hydroxyapatite on its surface by physical and chemical means. After the material is implanted into the human body, the titanium alloy can provide sufficient mechanical strength, and the hydroxyapatite coating on the surface can easily combine with human bones and induce the formation of new bones on the surface of human bones. Generally, the formation of new bones can be induced within a few months.

[0037] A notch 5 is provided at the bottom of the main nail 1, and the notch 5 can reduce stress concentration and avoid fracture around the distal prosthesis.

[0038] Working principle: First, align the limit groove 1 2007 with the limit block 2 2015, then pass the tension nail mechanism 2 through the main nail 1, and install the tension nail mechanism 2 and the main nail 1 to the fracture site, then align the limit block 3 305 with the limit groove 3 306, and put the limit seat 303 on the upper part of the main nail 1, and make the limit seat 303 slide up and down on the outer periphery of the limit block 3 305 through the limit groove 306, finally put the elastic component 302 in and install the seal. The cover 301 makes the lower surface of the block 304 contact with the upper surface of the outer sleeve 2009 through the elastic component 302, and fixes the outer sleeve 2009 to the middle and upper part of the main nail 1 through the thread groove 2004 and the tooth groove. By turning the knob 2006, the connecting ring 2014 and the elastic sheet 2013 drive the threaded tube 2012 to rotate synchronously. Since the outer periphery of the threaded tube 2012 is threadedly connected to the inside of the limit tube 2003, the limit block 2004 is also engaged. 11 slides inside the limiting groove 2008, and the limiting block 1 2011 is fixed on the left and right sides of the outer sleeve 2009. The limiting groove 2008 is opened on the left and right sides of the limiting tube 2003, so that the limiting tube 2003 drives the connecting tube 2002 to move toward the outer sleeve 2009, thereby pulling the bones at the fracture site closer and assisting the healing of the fracture site. When the bones at the fracture site are close to each other, the limiting tube 2003 cannot move inside the outer sleeve 2009. Then, the knob 2006 is continuously rotated to compress the elastic sheet 2013. The elastic force of the elastic sheet 2013 increases the friction between the threaded tube 2012 and the limiting tube 2003, and the friction between the connecting seat 2005, the knob 2006 and the outer sleeve 2009 increases, which can effectively prevent the loosening between the threads, improve the stability of the tension nail mechanism 2, assist the healing of the fracture site, and reduce the time of fracture healing.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-density surface pressure-fixed trauma orthopedic implant, comprising a main nail (1), characterized in that: A fixing mechanism (3) is arranged inside the upper side of the main nail (1), a tension nail mechanism (2) is arranged in the middle of the main nail (1), the lower part of the fixing mechanism (3) is arranged on the upper part of the tension nail mechanism (2), and a distal nail (4) is arranged in the lower middle part of the main nail (1); The tension nail mechanism (2) comprises a nail head (2001), a connecting tube (2002), a limiting tube (2003), an outer sleeve (2009), a limiting assembly and a rotating assembly. One end of the nail head (2001) is fixedly connected to one end of the connecting tube (2002), the other end of the connecting tube (2002) is fixedly connected to one end of the limiting tube (2003), the other end of the limiting tube (2003) is arranged at one end of the rotating assembly, the other end of the rotating assembly is connected to one end of the outer sleeve (2009), and the outer periphery of the limiting tube (2003) is slidably connected to the inside of the outer sleeve (2009) through the limiting assembly. The limiting assembly comprises a second limiting groove (2008) and a first limiting block (2011); the second limiting groove (2008) is arranged on the outer periphery of the limiting tube (2003); one side of the first limiting block (2011) is fixedly connected to an end of the outer sleeve (2009) away from the rotating assembly; the outer periphery of the first limiting block (2011) is slidably connected to the inside of the second limiting groove (2008); The rotating assembly comprises a connecting seat (2005), a knob (2006), a threaded tube (2012), an elastic sheet (2013) and a connecting ring (2014); one side of the knob (2006) is rotatably connected to one end of the connecting seat (2005); the other end of the connecting seat (2005) is internally rotatably connected to the outer periphery of one end of the outer sleeve (2009) away from the nail head (2001); one end of the threaded tube (2012) is fixedly connected to one end of the elastic sheet (2013); the other end of the elastic sheet (2013) is fixedly connected to one side of the connecting ring (2014); the other side of the connecting ring (2014) is fixedly connected to the side end of the knob (2006) close to the connecting seat (2005); and the outer periphery of the threaded tube (2012 is threadedly connected to the inside of the limiting tube (2003); The fixing mechanism (3) comprises a sealing cover (301), an elastic component (302), a limiting seat (303), a clamping block (304), a limiting block three (305) and a limiting groove three (306); one side of the limiting block three (305) is fixedly connected to the inner side wall of the upper middle part of the main nail (1); the limiting groove three (306) is arranged on the outer surface of the limiting seat (303); the outer periphery of the limiting block three (305) is slidably connected to the inside of the limiting groove three (306); the lower end of the elastic component (302) is arranged on the limiting seat ( The upper end of the elastic component (302) is arranged at the lower part of the sealing cover (301), the outer periphery of the lower part of the sealing cover (301) is arranged at the upper part of the main nail (1), the upper part of the clamping block (304) is fixedly connected to the lower part of the limiting seat (303), the middle part of the outer sleeve (2009) is provided with a thread groove (2004), the lower surface of the clamping block (304) is provided with a tooth groove that fits the thread groove (2004), and the lower part of the limiting seat (303) is arranged at the upper part of the outer sleeve (2009); The elastic component (302) comprises an upper cover (3021), a spring (3022) and a fixed tube (3023); the lower periphery of the upper cover (3021) is slidably connected to the interior of the fixed tube (3023); the lower end of the spring (3022) is fixedly connected to the inner bottom wall of the fixed tube (3023); the upper end of the spring (3022) is fixedly connected to the inner top wall of the upper cover (3021); the upper part of the upper cover (3021) is arranged on the lower part of the sealing cover (301); and the lower part of the fixed tube (3023) is arranged on the upper part of the limit seat (303).

2. The high-density surface pressurized fixation trauma orthopedic implant according to claim 1, characterized in that: A grouting hole (2010) is provided at one end of the nail head (2001) away from the connecting pipe (2002), and the grouting hole (2010) is communicated with the connecting pipe (2002).

3. The high-density surface pressurized fixation trauma orthopedic implant according to claim 1, characterized in that: The outer sleeve (2009) is provided with a limiting groove (2007) on both sides, and the inner walls on both sides of the upper and middle parts of the main nail (1) are provided with a limiting block (215), and the outer periphery of the limiting block (215) is slidably connected to the inside of the limiting groove (2007).

4. The high-density surface pressurized fixation trauma orthopedic implant according to claim 1, characterized in that: The outer surfaces of the main nail (1), the tension nail mechanism (2), the fixing mechanism (3) and the distal nail (4) are all provided with a hydroxyapatite coating.

5. The high-density surface pressure-fixed trauma orthopedic implant according to claim 1, characterized in that: The bottom of the main nail (1) is provided with a notch (5).

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