Encircling steel plate for periprosthetic fracture revision surgery

By designing a surround steel plate for revision surgery for periprosthesis, using the chimera of the fixing components and nut fixation, the problem of unreliable fixation in the prior art is solved, firm fixation of the prosthesis is achieved, the stability of internal fixation is enhanced, and trauma and complications are reduced.

CN119548230APending Publication Date: 2025-03-04THE 980TH HOSPITAL OF THE CHINESE PEOPLES LIBERATION ARMY JOINT LOGISTICS SUPPORT FORCE
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Patent Information

Application Number
CN202411932506.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-26
Publication Date
2025-03-04

AI Technical Summary

Technical Problem

The prior art has the disadvantages of being in patients with periprosthetic fractures and fractures after internal fixation, which are not firm and prone to fixation failure, surgery has great trauma, many complications, and high costs.

Method used

A surround steel plate for revision surgery of fractures around the prosthesis is designed, including the first surround steel plate and the second annular steel plate. The outer wall is equipped with fixing components, such as fixing holes, fixing bolts, nuts, anti-retardation columns and hexagonal grooves. Through the fitting of these components and the fixing of the nuts, a firm embrace of the prosthesis is achieved.

Benefits of technology

Through the design of the enclosing steel plate, the stability of internal fixation can be effectively enhanced, the removal and renovation of the prosthesis can be avoided, the trauma of patients is reduced, the recovery is accelerated, and the stability and expansion function of the enclosing steel plate can be enhanced during use.

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Abstract

The invention discloses an embracing steel plate for periprosthetic fracture revision surgery, and particularly relates to the technical field of fracture fixation instruments, the embracing steel plate comprises a first embracing steel plate and a second annular steel plate, the second annular steel plate is arranged on the right side of the first embracing steel plate, and fixing assemblies are arranged on the outer side walls of the first embracing steel plate and the second annular steel plate. The fixing assembly comprises a fixing hole, a fixing bolt, a nut, an anti-retreating column and a first hexagonal groove. By arranging the fixing bolts and the nuts, during use, after the first encircling steel plate and the second annular steel plate encircle the outer sides of a prosthesis and a bone body, the fixing bolts are inserted into the inner sides of the fixing holes, and the fixing holes are fixed and mutually embedded through the nuts, so that the prosthesis can be firmly fixed in an encircling manner, the stability of internal fixation is effectively enhanced, and the prosthesis is prevented from being taken out and overhauled; the wound of the patient is reduced, rehabilitation is accelerated, and the stability of the embracing steel plate in use is enhanced.
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Description

Technical Field

[0001] The invention relates to the technical field of fracture fixation instruments, in particular to an embracing steel plate for periprosthetic fracture revision surgery. Background Art

[0002] With the development of orthopedic prosthesis replacement and internal fixation technology, more and more patients are undergoing prosthesis replacement and internal fixation treatment. The incidence of periprosthetic fractures and re-fractures after internal fixation is increasing. For periprosthetic fractures, the current conventional treatment methods have the disadvantages of unreliable fixation, easy fixation failure, large surgical trauma, many complications, and high costs. Therefore, in order to better solve this clinical problem, new treatment methods and corresponding internal fixation materials are urgently needed.

[0003] Patients with periprosthetic fractures and refractures after internal fixation are often elderly or high-energy injury patients. When performing revision surgery, the patient's general condition and damage control must be considered. Conventional internal fixation materials in the past were difficult to meet clinical needs due to their design limitations, which brought great limitations to the development of related surgeries. If single cortical screw fixation is used, there are risks such as screw extraction and screw loosening due to the consistent screw angle, which can easily lead to internal fixation failure. If wire cerclage is used, the damage is greater, affecting blood circulation and easily leading to complications such as fracture nonunion.

[0004] Therefore, a surrounding steel plate for periprosthetic fracture revision surgery is needed to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an embracing steel plate for revision surgery of periprosthetic fractures, so as to solve the problem of poor fixation effect of the steel plate on the bone body mentioned in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an embracing steel plate for periprosthetic fracture revision surgery, comprising a first embracing steel plate and a second annular steel plate, the second annular steel plate being arranged on the right side of the first embracing steel plate, the outer side walls of the first embracing steel plate and the second annular steel plate being provided with fixing components, the fixing components comprising a fixing hole, a fixing bolt, a nut, an anti-retreat column and a first hexagonal groove, the first embracing steel plate and the outer side walls of the second annular steel plate being provided with fixing holes, the interior of the fixing holes being provided with fixing bolts, the outside of the fixing bolts being provided with nuts, the inner side of the fixing holes being provided with anti-retreat columns, and the surface of the anti-retreat columns being provided with a first hexagonal groove.

[0007] As a further technical solution of the present invention, the bottom ends of the first embracing steel plate and the second annular steel plate are each provided with a first connecting groove, the outer side walls of the first embracing steel plate and the second annular steel plate are each provided with a first locking hole, a first locking bolt is provided inside the first locking hole, and an extended embracing plate is provided below the first embracing steel plate and the second annular steel plate.

[0008] As a further technical solution of the present invention, the outer wall of the extended encircling plate is provided with a second locking hole, a second locking bolt is provided inside the second locking hole, a second connecting groove is provided through the top of the extended encircling plate, and connecting rods are provided inside the first connecting groove and the second connecting groove.

[0009] As a further technical solution of the present invention, a plurality of the first connecting grooves are arranged at the bottom ends of the first embracing steel plate and the second annular steel plate, and the plurality of the first connecting grooves are distributed in parallel.

[0010] As a further technical solution of the present invention, the top ends of the first embracing steel plate and the second annular steel plate are both provided with top holes, the interior of the top hole is provided with a knob, the top end of the knob is provided with a second hexagonal groove, the bottom end of the top hole is provided with a bottom groove, the bottom end of the knob is installed with a screw rod, and the bottom end of the screw rod extends to the interior of the bottom groove.

[0011] As a further technical solution of the present invention, a side groove is provided on the right side of the bottom groove, a movable ring is provided on the outer side of the screw rod, a first inclined platform is fixed on the right side of the movable ring, the right side of the first inclined platform extends to the inside of the side groove, a clamping block is provided on the inner side of the side groove, and a second inclined platform is fixed on the left side of the clamping block.

[0012] As a further technical solution of the present invention, a plurality of top holes are arranged at the top ends of the first embracing steel plate and the second annular steel plate, and the plurality of top holes are distributed in an annular shape.

[0013] As a further technical solution of the present invention, the surface of the screw rod is provided with an external thread, and the interior of the moving ring is provided with an internal thread.

[0014] Compared with the prior art, the invention has the following beneficial effects: by providing the fixing bolt and the nut, when in use, after the first embracing steel plate and the second annular steel plate are embracing the outside of the prosthesis and the bone body, the fixing bolt is inserted into the inner side of the fixing hole, and the nut is used to fix them, and the nut is used to fit each other, so that the prosthesis can be firmly fixed by embracing, the stability of the internal fixation can be effectively enhanced, the removal and renovation of the prosthesis can be avoided, the trauma of the patient can be reduced, the recovery can be accelerated, and the stability of the embracing steel plate when in use can be enhanced;

[0015] By providing an extended embracing plate, two groups of extended embracing plates are located below the first embracing steel plate and the second annular steel plate, and are connected by a connecting rod. After the second locking bolt on the outer side wall of the extended embracing plate is slightly loosened, the extended embracing plate can be moved down along the connecting rod, thereby assisting in expanding the fixing range of the first embracing steel plate and the second annular steel plate, thereby realizing the expansion function of the embracing steel plate when in use;

[0016] By providing a clamping block, when the knob is turned to drive the screw to rotate, the movable ring can move downward along the screw with the assistance of the thread, and the first inclined platform on the right side of the movable ring contacts the second inclined platform as the movable ring moves downward, and can slowly push the clamping block to move to the inner side of the first encircling steel plate or the second annular steel plate, and can further fix the position of the first encircling steel plate and the second annular steel plate when the first encircling steel plate and the second annular steel plate are encircled and fixed on the outside of the prosthesis, thereby enhancing the fixing function of the encircling steel plate when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front cross-sectional structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of a top cross-sectional structure of the present invention;

[0019] Figure 3 It is a front view structural schematic diagram of the present invention;

[0020] Figure 4 For the present invention Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0021] Figure 5 It is a schematic diagram of the front cross-sectional structure of the fixing bolt of the present invention;

[0022] Figure 6 It is a schematic diagram of the front cross-sectional structure of the clamping block of the present invention.

[0023] In the figure: 1. first encircling steel plate; 2. second annular steel plate; 3. first connecting groove; 4. first locking hole; 5. first locking bolt; 6. extended encircling plate; 7. second locking hole; 8. second locking bolt; 9. second connecting groove; 10. connecting rod; 11. fixing hole; 12. fixing bolt; 13. nut; 14. anti-retraction column; 15. first hexagonal groove; 16. top hole; 17. knob; 18. second hexagonal groove; 19. bottom groove; 20. screw rod; 21. side groove; 22. movable ring; 23. first ramp; 24. clamping block; 25. second ramp. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-6 , an embodiment provided by the present invention: an embracing steel plate for revision surgery of periprosthetic fractures, comprising a first embracing steel plate 1 and a second annular steel plate 2, the second annular steel plate 2 is arranged on the right side of the first embracing steel plate 1, the bottom ends of the first embracing steel plate 1 and the second annular steel plate 2 are both provided with a first connecting groove 3, a plurality of first connecting grooves 3 are arranged at the bottom ends of the first embracing steel plate 1 and the second annular steel plate 2, and the plurality of first connecting grooves 3 are distributed in parallel, the outer side walls of the first embracing steel plate 1 and the second annular steel plate 2 are both provided with a first locking hole 4, a first locking bolt 5 is arranged inside the first locking hole 4, an extended embracing plate 6 is arranged below the first embracing steel plate 1 and the second annular steel plate 2, the outer side wall of the extended embracing plate 6 is provided with a second locking hole 7, a second locking bolt 8 is arranged inside the second locking hole 7, a second connecting groove 9 is arranged through the top end of the extended embracing plate 6, and a connecting rod 10 is arranged inside the first connecting groove 3 and the second connecting groove 9;

[0026] Specifically, Figure 1 , Figure 2 and Figure 4 As shown, when in use, after the second locking bolt 8 is loosened, the expansion embracing plate 6 can be moved down along the connecting rod 10, thereby adjusting the position of the expansion embracing plate 6 below the first embracing steel plate 1 and the second annular steel plate 2 to assist in expanding the reinforced area. After the expansion is completed, the second locking bolt 8 can be tightened to fix it;

[0027] The outer side walls of the first encircling steel plate 1 and the second annular steel plate 2 are provided with a fixing assembly, which includes a fixing hole 11, a fixing bolt 12, a nut 13, an anti-recoil column 14 and a first hexagonal groove 15. The outer side walls of the first encircling steel plate 1 and the second annular steel plate 2 are provided with a fixing hole 11, a fixing bolt 12 is provided inside the fixing hole 11, a nut 13 is provided outside the fixing bolt 12, an anti-recoil column 14 is provided inside the fixing hole 11, and a first hexagonal groove 15 is provided on the surface of the anti-recoil column 14;

[0028] Specifically, Figure 2 , Figure 3 and Figure 5As shown, when in use, after the first encircling steel plate 1 and the second annular steel plate 2 are docked on the outside of the prosthesis, the fixing bolt 12 can be inserted into the inside of the fixing hole 11, and connected and fixed by the nut 13, and they are interlocked with each other, so that the prosthesis can be encircled and fixed firmly, effectively enhancing the stability of internal fixation, avoiding the removal and renovation of the prosthesis, reducing the patient's trauma, and accelerating recovery;

[0029] The top ends of the first encircling steel plate 1 and the second annular steel plate 2 are both provided with top holes 16. A plurality of top holes 16 are provided at the top ends of the first encircling steel plate 1 and the second annular steel plate 2. The plurality of top holes 16 are distributed in an annular shape. A knob 17 is provided inside the top hole 16. A second hexagonal groove 18 is provided at the top end of the knob 17. A bottom groove 19 is provided at the bottom end of the top hole 16. A screw rod 20 is installed at the bottom end of the knob 17. The bottom end of the screw rod 20 extends to the inside of the bottom groove 19. A side groove 21 is provided on the right side of the bottom groove 19. A moving ring 22 is provided on the outside of the screw rod 20. An external thread is provided on the surface of the screw rod 20. An internal thread is provided inside the moving ring 22. A first ramp 23 is fixed on the right side of the moving ring 22. The right side of the first ramp 23 extends to the inside of the side groove 21. A clamping block 24 is provided on the inside of the side groove 21. A second ramp 25 is fixed on the left side of the clamping block 24.

[0030] Specifically, Figure 6 As shown, when in use, after turning the knob 17 to drive the screw rod 20 to rotate, the movable ring 22 can move downward along the screw rod 20. When the movable ring 22 drives the first inclined platform 23 to move downward, it contacts and cooperates with the second inclined platform 25, and can push the clamping block 24 to move toward the inner side of the first surrounding steel plate 1 and the second annular steel plate 2. With the help of the second inclined platform 25, the first surrounding steel plate 1 and the second annular steel plate 2 are further reinforced.

[0031] Working principle: When in use, first loosen the second locking bolt 8 on the outer wall of the expansion encircling plate 6, and move it down along the connecting rod 10, so as to expand the overall fixing range of the first encircling steel plate 1, the second annular steel plate 2 and the first locking hole 4 to adapt to the range where the prosthesis needs to be fixed. After the adjustment is completed, tighten the second locking bolt 8 to fix it. After the first encircling steel plate 1 and the second annular steel plate 2 are docked on the outside of the prosthesis, the fixing bolt 12 can be inserted into the inner side of the fixing hole 11, and connected and fixed by the nut 13. They fit together and can encircle the prosthesis and fix it firmly, effectively enhancing The stability of internal fixation avoids the removal and revision of the prosthesis, reduces patient trauma, and speeds up recovery. After fixation, the knob 17 can be turned to drive the screw 20 to rotate, and the movable ring 22 moves down along the screw 20. The first inclined platform 23 on the right side of the movable ring 22 contacts the second inclined platform 25 as the movable ring 22 moves downward, and the clamping block 24 can be slowly pushed toward the inside of the first encircling steel plate 1 or the second annular steel plate 2 to assist in filling the gap between the first encircling steel plate 1, the second annular steel plate 2 and the prosthesis, thereby further improving the fixing effect of the first encircling steel plate 1 or the second annular steel plate 2.

[0032] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An embracing steel plate for periprosthetic fracture revision surgery, comprising a first embracing steel plate (1) and a second annular steel plate (2), characterized in that: A second annular steel plate (2) is arranged on the right side of the first encircling steel plate (1), and fixing components are arranged on the outer side walls of the first encircling steel plate (1) and the second annular steel plate (2); The fixing assembly comprises a fixing hole (11), a fixing bolt (12), a nut (13), an anti-recoil column (14) and a first hexagonal groove (15); the outer walls of the first embracing steel plate (1) and the second annular steel plate (2) are provided with a fixing hole (11); a fixing bolt (12) is provided inside the fixing hole (11); a nut (13) is provided outside the fixing bolt (12); an anti-recoil column (14) is provided inside the fixing hole (11); and a first hexagonal groove (15) is provided on the surface of the anti-recoil column (14).

2. The embracing steel plate for periprosthetic fracture revision surgery according to claim 1, characterized in that: The bottom ends of the first embracing steel plate (1) and the second annular steel plate (2) are both provided with a first connecting groove (3), the outer side walls of the first embracing steel plate (1) and the second annular steel plate (2) are both provided with a first locking hole (4), the interior of the first locking hole (4) is provided with a first locking bolt (5), and an extended embracing plate (6) is provided below the first embracing steel plate (1) and the second annular steel plate (2).

3. The embracing steel plate for periprosthetic fracture revision surgery according to claim 2, characterized in that: The outer side wall of the expansion embracing plate (6) is provided with a second locking hole (7), a second locking bolt (8) is provided inside the second locking hole (7), a second connecting groove (9) is provided through the top end of the expansion embracing plate (6), and connecting rods (10) are provided inside the first connecting groove (3) and the second connecting groove (9).

4. The embracing steel plate for periprosthetic fracture revision surgery according to claim 2, characterized in that: A plurality of the first connecting grooves (3) are arranged at the bottom ends of the first embracing steel plate (1) and the second annular steel plate (2), and the plurality of the first connecting grooves (3) are distributed in parallel.

5. The embracing steel plate for periprosthetic fracture revision surgery according to claim 1, characterized in that: The top ends of the first embracing steel plate (1) and the second annular steel plate (2) are both provided with a top hole (16), a knob (17) is provided inside the top hole (16), a second hexagonal groove (18) is provided at the top end of the knob (17), a bottom groove (19) is provided at the bottom end of the top hole (16), a screw rod (20) is installed at the bottom end of the knob (17), and the bottom end of the screw rod (20) extends to the inside of the bottom groove (19).

6. The embracing steel plate for periprosthetic fracture revision surgery according to claim 5, characterized in that: A side groove (21) is arranged on the right side of the bottom groove (19), a moving ring (22) is arranged on the outer side of the screw rod (20), a first inclined platform (23) is fixed on the right side of the moving ring (22), the right side of the first inclined platform (23) extends to the inside of the side groove (21), a clamping block (24) is arranged on the inner side of the side groove (21), and a second inclined platform (25) is fixed on the left side of the clamping block (24).

7. The embracing steel plate for revision surgery of periprosthetic fractures according to claim 5, characterized in that: A plurality of top holes (16) are arranged at the top ends of the first embracing steel plate (1) and the second annular steel plate (2), and the plurality of top holes (16) are distributed in an annular shape.

8. The embracing steel plate for periprosthetic fracture revision surgery according to claim 6, characterized in that: The surface of the screw rod (20) is provided with an external thread, and the interior of the moving ring (22) is provided with an internal thread.