Fixing system

Abstract

This application provides a fixation system relating to the field of medical devices. The fixation system includes a fixation plate, an inner hole, an outer hole, and a first transition surface; the inner hole is disposed on the fixation plate; the outer hole is disposed on the fixation plate and spaced apart from the inner hole; the first transition surface is disposed between the sidewall of the inner hole and the surface of the fixation plate, and is located on the outer periphery of the inner hole. The fixation system provided by this application solves the technical problem of poor fixation strength of looped titanium plates in the prior art.

Description

Technical Field

[0001] This application relates to the field of medical devices, and more specifically, to a fixation system. Background Technology

[0002] Ligaments are important fibrous tissues that connect bones in the human body. When a ligament ruptures due to a fall during exercise, looped titanium plates are commonly used to replace the ligament and fix the two bones. The loops of the looped titanium plate fix the ligament graft to the bone, and the adjustable size of the loops facilitates the traction and positioning of the ligament graft within the bone tunnel. See also Figure 1 The existing looped titanium plate includes eight through holes extending through it and configured for sutures 22. The first outer hole 1, the second outer hole 8, and the first intermediate hole 2 and the second intermediate hole 7 are aligned with each other along the longitudinal axis of the looped titanium plate. The first central hole 3, the second central hole 4, the third central hole 5, and the fourth central hole 6 are formed in two pairs, symmetrically offset from the longitudinal axis but aligned with each other transversely to the longitudinal axis. The two central pairs of first central holes 3, second central holes 4, third central holes 5, and fourth central holes 6 are designed to receive first suture loops 12 and second suture loops 14 passing through them. The middle pair of first intermediate holes 2 and second intermediate holes 7 are designed to receive first ends 30 and second ends 32 of the sutures, respectively. The outer pair of first outer holes 1 and second outer holes 8 are designed to assist in placing the looped titanium plate on the lateral side of the bone by using anterior and posterior sutures (not shown) passing through the first outer holes 1 and second outer holes 8.

[0003] The inner hole of the existing looped titanium plate is prone to stress concentration when subjected to stress, resulting in poor fixation strength and insufficient stable support for ligament reconstruction. During the postoperative recovery process, problems such as ligament displacement may occur due to insecure fixation, affecting the surgical outcome. Utility Model Content

[0004] The purpose of this application is to provide a fixing system to alleviate the technical problem of poor fixing strength of looped titanium plates in the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] The present invention provides a fixing system including a fixing plate;

[0007] An inner hole is provided in the fixing plate;

[0008] An outer hole is provided on the fixing plate and is spaced apart from the inner hole;

[0009] The first transition surface is located between the sidewall of the inner hole and the surface of the fixing plate, and is situated on the outer periphery of the inner hole.

[0010] The first transition surface serves to prevent cutting and reduces the friction between the thread and the fixing plate, thereby increasing the amount of thread movement and facilitating the contraction and pulling of the adjustable coil.

[0011] Furthermore, the fixing system includes:

[0012] A first surface is provided on the fixing plate;

[0013] The second surface is provided on the fixing plate and is opposite to the first surface. Both the inner hole and the outer hole penetrate the fixing plate from the first surface to the second surface.

[0014] A first groove is provided on the first surface and communicates with the inner hole;

[0015] The second groove is provided on the second surface and communicates with the inner hole.

[0016] The first surface and the second surface are two opposing surfaces of the fixing plate. Both the inner hole and the outer hole penetrate the fixing plate so that the surgical implant can pass through the inner hole or the outer hole. The first groove on the first surface is connected to the inner hole. The first groove is used to divert the surgical implant to avoid the problem of increased friction caused by entanglement, and to facilitate easy pulling of the surgical implant. Similarly, the second groove on the second surface is connected to the inner hole. The second groove is used to divert the surgical implant to avoid the problem of increased friction caused by entanglement, and to facilitate easy pulling of the surgical implant.

[0017] Furthermore, the position of the second groove corresponds to the position of the first groove. This further avoids the problem of increased friction caused by surgical implant entanglement, making it easier to pull the surgical implant.

[0018] Furthermore, the fixing system includes:

[0019] The second transition surface is located between the sidewall of the first groove and the first surface of the fixing plate, and is located on the outer periphery of the first groove;

[0020] And / or, a third transition surface is disposed between the sidewall of the second groove and the second surface of the fixing plate, and is located on the outer periphery of the second groove.

[0021] When using this fixation plate, if the surgical implant is not tightened after passing through the inner hole, the position of the surgical implant will not be opposite to the first groove or the second groove, but opposite to the first surface or the second surface. When tightening the surgical implant, the second transition surface and the third transition surface play a guiding role for the surgical implant, so that the tightened surgical implant is placed in the first groove or the second groove.

[0022] Furthermore, the fixing system includes:

[0023] The fourth transition surface is located at the junction of the sidewall of the inner hole and the sidewall of the first groove;

[0024] And / or, a fifth transition surface is provided at the connection between the sidewall of the inner hole and the sidewall of the second groove.

[0025] The improved design of the groove-hole connection edge of the fixing plate is to make the edge of the groove and hole contact a gradually connected arc shape, so that the stress can be evenly distributed throughout the contact area, avoiding the stress concentration problem caused by the step structure, and effectively improving the mechanical performance.

[0026] Furthermore, the fixing system includes:

[0027] The sixth transition surface is located between the side wall of the outer hole and the surface of the fixing plate, and is situated on the outer periphery of the outer hole.

[0028] The sixth transition surface acts as a cut prevention layer, reduces stress concentration points, thereby enhancing the mechanical strength of the fixation system and providing a more stable fixation foundation for ligament reconstruction.

[0029] Furthermore, the horizontal cross-section of the outer hole is pear-shaped, with a larger diameter at the end closer to the inner hole and a smaller diameter at the end farther from the inner hole. This increases the space of the outer hole, facilitating one-handed operation.

[0030] Furthermore, both the inner hole and the outer hole are provided in two forms;

[0031] The two outer holes and the two inner holes are spaced apart along the length of the fixing plate, and the two inner holes are located between the two outer holes; on the same surface of the fixing plate, the same inner hole connects two grooves, and the two grooves are spaced apart along the width of the fixing plate.

[0032] The fixation plate optimizes the existing technology's eight holes into two inner holes and two outer holes, improving the product's handling feel. The larger inner hole space allows for greater tension and contraction of the surgical implant, facilitating single-handed tightening and reducing surgical time. Two grooves on the same surface of the fixation plate divert the surgical implant, housing adjustable coil loops and preventing backflow and tangling of the implant.

[0033] Furthermore, the fixing system includes:

[0034] A symmetry line is provided on the fixed plate and perpendicular to the length direction of the fixed plate. The two inner holes are symmetrically arranged about the symmetry line, and the two outer holes are symmetrically arranged about the symmetry line.

[0035] The two inner holes are symmetrically arranged about the line of symmetry, which shortens the length of the surgical implant compared to a staggered arrangement of the two inner holes and further avoids the problem of implant entanglement. Similarly, the two outer holes are symmetrically arranged about the line of symmetry, which further avoids the problem of implant entanglement.

[0036] Furthermore, the inner hole includes a first hole area and a second hole area arranged along the width direction of the fixing plate, and the first hole area and the second hole area are connected; the two inner holes are arranged opposite to each other. The inner hole is cashew-shaped or heart-shaped with the first hole area and the second hole area, which can increase the space of the inner hole, and the partitioning of the inner hole can further avoid the problem of surgical implants getting entangled.

[0037] Furthermore, the adjacent outer and inner holes are connected. The connection between adjacent outer and inner holes forms a clover-shaped pattern, which increases the space within the inner hole and facilitates one-handed operation.

[0038] Based on the above technical solutions, the technical effects achievable by this utility model can be analyzed as follows:

[0039] The fixation system provided by this utility model includes a fixation plate, an inner hole, an outer hole, and a first transition surface. The inner hole is located on the fixation plate; the outer hole is located on the fixation plate and spaced apart from the inner hole; the first transition surface is located between the sidewall of the inner hole and the surface of the fixation plate, and is situated on the outer periphery of the inner hole. The fixation plate has a first surface and a second surface that are opposite to each other. The sidewall of the inner hole is connected to both the first surface and the second surface of the fixation plate via the first transition surface. The first transition surface can be configured as a slope or an arc surface. The first transition surface serves to prevent cutting and reduces the friction between the surgical implant (e.g., suture) and the fixation plate, thereby increasing the mobility of the surgical implant and facilitating the contraction and traction of the adjustable coil. This fixation plate abandons the design of a protruding outer edge of the inner hole, adopting a smooth, non-protruding outer edge structure of the inner hole, reducing stress concentration points, thereby enhancing the mechanical strength of the fixation system and providing a more stable fixation foundation for ligament reconstruction.

[0040] This fixed system has the following advantages:

[0041] Improved mechanical fixation strength: The optimized outer edge of the inner hole significantly enhances the mechanical fixation strength of the single-hand adjustable fixation plate, enabling it to better withstand various stresses on the ligaments during the recovery process, reducing the risk of ligament displacement and fixation failure, and providing a more reliable guarantee for surgical success.

[0042] Enhanced mechanical stability: By eliminating stress concentration points, the entire fixation system becomes more stable in terms of mechanical properties; it can maintain good fixation under different stress conditions, which helps patients recover ligament function faster and more stably after surgery and reduces the risk of secondary surgery due to unstable fixation. Attached Figure Description

[0043] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the structure of a fixed plate in the prior art;

[0045] Figure 2 A schematic diagram of the structure of the fixing plate in the fixing system provided in this application embodiment. Figure 1 ;

[0046] Figure 3 A schematic diagram of the structure of the fixing plate in the fixing system provided in this application embodiment. Figure 2 ;

[0047] Figure 4 A schematic diagram of the structure of the fixing plate in the fixing system provided in this application embodiment. Figure 3 ;

[0048] Figure 5 for Figure 3 Cross-sectional view at point AA;

[0049] Figure 6 for Figure 3 Cross-sectional view at point BB;

[0050] Figure 7 for Figure 3 Cross-sectional view at point C;

[0051] Figure 8 A schematic diagram of the second embodiment of the fixing plate in the fixing system provided in this application. Figure 1 ;

[0052] Figure 9 A schematic diagram of the second embodiment of the fixing plate in the fixing system provided in this application. Figure 2 ;

[0053] Figure 10 A schematic diagram of the third embodiment of the fixing plate in the fixing system provided in this application. Figure 1 ;

[0054] Figure 11 A schematic diagram of the third embodiment of the fixing plate in the fixing system provided in this application. Figure 2 ;

[0055] Figure 12 For comparison of experimental data;

[0056] Figure 13 A schematic diagram of the structure of the fixing system provided in the embodiments of this application.

[0057] icon:

[0058] 1-First external hole; 8-Second external hole; 2-First intermediate hole; 7-Second intermediate hole; 22-Suture; 3-First central hole; 4-Second central hole; 5-Third central hole; 6-Fourth central hole; 12-First suture loop; 14-Second suture loop; 30-First end; 32-Second end;

[0059] 100 - Fixing plate; 110 - Inner hole; 120 - Outer hole; 130 - First surface; 140 - Second surface; 150 - First groove; 160 - Second groove; 111 - First hole area; 112 - Second hole area;

[0060] 210 - First transition surface; 220 - Second transition surface; 230 - Third transition surface; 240 - Fourth transition surface; 260 - Sixth transition surface. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0062] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0063] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0064] Ligaments are vital fibrous tissues connecting bones in the human body. When a ligament ruptures due to a fall or injury during sports, medical devices are needed to replace the ligament and fix the two bones. This is achieved through surgeries such as those for acromioclavicular joint dislocation, distal tibia and fibula separation, and biceps brachii muscle rupture. Currently, looped titanium plates are commonly used. The loops of the looped titanium plate are connected to the ligament graft. Adjustable loops facilitate the traction and positioning of the ligament graft within the bone tunnel. See also... Figure 1 The existing looped titanium plate includes eight through holes extending through it and configured for sutures 22. The first outer hole 1, the second outer hole 8, and the first intermediate hole 2 and the second intermediate hole 7 are aligned with each other along the longitudinal axis of the looped titanium plate. The first central hole 3, the second central hole 4, the third central hole 5, and the fourth central hole 6 are formed in two pairs, symmetrically offset from the longitudinal axis but aligned with each other transversely to the longitudinal axis. The two central pairs of first central holes 3, second central holes 4, third central holes 5, and fourth central holes 6 are designed to receive first suture loops 12 and second suture loops 14 passing through them. The middle pair of first intermediate holes 2 and second intermediate holes 7 are designed to receive first ends 30 and second ends 32 of the sutures, respectively. The outer pair of first outer holes 1 and second outer holes 8 are designed to assist in placing the looped titanium plate on the lateral side of the bone by using anterior and posterior sutures (not shown) passing through the first outer holes 1 and second outer holes 8. The four central holes are subjected to stress separately, which has defects in mechanical performance, and the existing anti-cut design of the looped titanium plate is not perfect. Testing revealed that the protruding structure on the outer edge of the inner hole and the non-smooth wire groove result in poor fixation strength of the looped titanium plate, even lower than that of a pure coil without a titanium plate. This fails to provide sufficient stable support for ligament reconstruction, and during postoperative recovery, insecure fixation may lead to ligament displacement and other problems, affecting the surgical outcome. This structure is prone to stress concentration under stress, reducing the overall mechanical stability of the fixation system and failing to meet the high-strength fixation requirements of ligament reconstruction surgery.

[0065] In view of this, see Figures 2 to 12 The fixing system provided in this embodiment includes a fixing plate 100, an inner hole 110, an outer hole 120, and a first transition surface 210. The inner hole 110 is disposed on the fixing plate 100; the outer hole 120 is disposed on the fixing plate 100 and spaced apart from the inner hole 110; the first transition surface 210 is disposed between the sidewall of the inner hole 110 and the surface of the fixing plate 100, and is located on the outer periphery of the inner hole 110. See also... Figure 13 The fixation system also includes a surgical implant that passes through the inner hole 110 and the outer hole 120 to achieve the fixation function of the fixation system. The surgical implant may be a suture or the like.

[0066] Specifically, the fixing plate 100 is made of titanium. The vertical cross-section of the first transition surface 210 can be set as a straight line or an arc. If the cross-section of the first transition surface 210 is a straight line, the straight line connects to the surface of the fixing plate 100 and the side wall of the inner hole 110 at an angle. If the cross-section of the first transition surface 210 is an arc, the central angle of the arc is α, where 0° < α < 280°. The fixing plate 100 is manufactured using a mold to ensure the smoothness and consistency of the first transition surface 210.

[0067] See Figure 1 and Figure 4 The fixation plate 100 has a first surface 130 and a second surface 140 that are opposite to each other (as described below). The sidewall of the inner hole 110 is connected to the first surface 130 and the second surface 140 of the fixation plate 100 through a first transition surface 210. The first transition surface 210 can be set as a slope or an arc surface. The first transition surface 210 plays a role in preventing cuts and reduces the friction between the surgical implant (e.g., suture) and the fixation plate 100, thereby increasing the mobility of the surgical implant and facilitating the contraction and traction of the adjustable coil. This fixation plate 100 abandons the design of the outer edge of the inner hole in the prior art, and adopts a smooth, non-protruding outer edge structure of the inner hole 110, reducing stress concentration points, thereby enhancing the mechanical strength of the fixation system and providing a more stable fixation foundation for ligament reconstruction.

[0068] This fixed system has the following advantages:

[0069] Improved mechanical fixation strength: The optimized outer edge of the inner hole 110 significantly enhances the mechanical fixation strength of the single-hand adjustable fixation plate 100, which can better withstand various stresses on the ligament during the recovery process, reduce the risk of ligament displacement and fixation failure, and provide a more reliable guarantee for surgical success.

[0070] Enhanced mechanical stability: By eliminating stress concentration points, the entire fixation system becomes more stable in terms of mechanical properties; it can maintain good fixation under different stress conditions, which helps patients recover ligament function faster and more stably after surgery and reduces the risk of secondary surgery due to unstable fixation.

[0071] In an optional embodiment of this utility model, two inner holes 110 and two outer holes 120 are provided; the two outer holes 120 and the two inner holes 110 are spaced apart along the length direction of the fixing plate 100, and the two inner holes 110 are located between the two outer holes 120; on the same surface of the fixing plate 100, the same inner hole 110 connects two grooves, and the two grooves are spaced apart along the width direction of the fixing plate 100 (this groove is the same as the first groove 150 or the second groove 160 below).

[0072] Specifically, the two end faces of the fixing plate 100 are arc-shaped surfaces that bulge away from the center of the fixing plate 100. The fixing plate 100 optimizes the four inner holes in the prior art into two spaced inner holes 110, and optimizes the outer holes 120 into two. Furthermore, the horizontal cross-section of the inner holes 110 of the fixing plate 100 is non-circular, and its length extends along the width direction of the fixing plate 100.

[0073] The fixation plate 100 optimizes the eight holes in the prior art into two inner holes 110 and two outer holes 120, improving the handling feel of the product. The inner holes 110 have more space for the traction and contraction of surgical implants (such as sutures), which is conducive to single-handed tightening and reduces operation time. Two grooves on the same surface of the fixation plate 100 divert surgical implants and accommodate the loops of adjustable coils to prevent back-threading of surgical implants.

[0074] In an optional embodiment of this utility model, the fixing system includes a first surface 130, a second surface 140, a first groove 150, and a second groove 160; the first surface 130 is disposed on the fixing plate 100; the second surface 140 is disposed on the fixing plate 100 and is opposite to the first surface 130; the inner hole 110 and the outer hole 120 both penetrate the fixing plate 100 from the first surface 130 to the second surface 140; the first groove 150 is disposed on the first surface 130 and communicates with the inner hole 110; the second groove 160 is disposed on the second surface 140 and communicates with the inner hole 110.

[0075] Specifically, see Figures 2 to 4 In this embodiment, both the inner hole 110 and the outer hole 120 are provided in twos; and both the first groove 150 and the second groove 160 are also provided in twos. The two first grooves 150 are spaced apart along the width direction of the fixing plate 100, and the positions of the two second grooves 160 correspond to the positions of the two first grooves 150 respectively. Furthermore, on the first surface 130, the two inner holes 110 are connected through the first grooves 150; on the second surface 140, the two inner holes 110 are connected through the second grooves 160. Of course, the two inner holes 110 not being connected is also within the protection scope of this utility model embodiment. Further, see... Figure 6 The bottom wall of the first groove 150 and the bottom wall of the second groove 160 are arc-shaped; or, the bottom wall of the first groove 150 and the side wall of the first groove 150 are connected by an arc-shaped transition, and the bottom wall of the second groove 160 and the side wall of the second groove 160 are connected by an arc-shaped transition.

[0076] The first groove 150 and the second groove 160 are used to divert surgical implants (e.g., sutures) to prevent them from becoming tangled together, which would increase the friction on the surgical implants (e.g., sutures).

[0077] In an optional embodiment of this utility model, the fixing system includes a second transition surface 220 and / or a third transition surface 230; the second transition surface 220 is disposed between the side wall of the first groove 150 and the first surface 130 of the fixing plate 100, and is located on the outer periphery of the first groove 150; the third transition surface 230 is disposed between the side wall of the second groove 160 and the second surface 140 of the fixing plate 100, and is located on the outer periphery of the second groove 160.

[0078] Specifically, in this embodiment, see Figure 6 The sidewall of the first groove 150 is connected to the first surface 130 of the fixing plate 100 through a second transition surface 220, and the sidewall of the second groove 160 is connected to the second surface 140 of the fixing plate 100 through a third transition surface 230; and the vertical cross-sections of the second transition surface 220 and the third transition surface 230 are both set as arcs.

[0079] When using the fixation plate 100, if a surgical implant (e.g., a suture) is not tightened after passing through the two inner holes 110, the position of the suture will not be opposite to the first groove 150 or the second groove 160, but opposite to the first surface 130 or the second surface 140. When the surgical implant (e.g., a suture) is tightened, the second transition surface 220 and the third transition surface 230 guide the surgical implant (e.g., a suture) so that the tightened surgical implant (e.g., a suture) is placed in the first groove 150 or the second groove 160.

[0080] In an optional embodiment of this utility model, the fixing system includes a fourth transition surface 240 and / or a fifth transition surface. The fourth transition surface 240 is disposed at the connection between the side wall of the inner hole 110 and the side wall of the first groove 150; the fifth transition surface is disposed at the connection between the side wall of the inner hole 110 and the side wall of the second groove 160.

[0081] Specifically, see Figure 4 The sidewall of the inner hole 110 is connected to the sidewall of the first groove 150 via a fourth transition surface 240, and the sidewall of the inner hole 110 is connected to the sidewall of the second groove 160 via a fifth transition surface. The vertical cross-sections of the fourth transition surface 240 and the fifth transition surface are set as circular arcs.

[0082] The fixed plate 100 features an improved design for the groove-hole connection edge, with the edge where the groove and hole contact each other designed as a gradually connecting arc. During the machining of the fixed plate 100, CNC machining is used to control the curvature of the groove-hole connection edge, ensuring that stress is evenly distributed throughout the contact area. This avoids stress concentration problems caused by the stepped structure and effectively improves mechanical properties.

[0083] In an optional embodiment of this utility model, the fixing system includes a symmetry line, which is located on the fixing plate 100 and perpendicular to the length direction of the fixing plate. Two inner holes 110 are symmetrically arranged about the symmetry line, and two outer holes 120 are symmetrically arranged about the symmetry line.

[0084] Specifically, see Figure 3 , Figure 9 and Figure 11 The horizontal cross-section of the outer hole 120 is pear-shaped, with a larger diameter at the end near the inner hole 110 and a smaller diameter at the end away from the inner hole 110, in order to increase the space of the outer hole 120.

[0085] The two inner holes 110 are symmetrically arranged about the line of symmetry, which shortens the length of the surgical implant compared to a staggered arrangement of the two inner holes 110, and further avoids the problem of surgical implant entanglement. Similarly, the two outer holes 120 are symmetrically arranged about the line of symmetry, which further avoids the problem of surgical implant entanglement.

[0086] In one embodiment, the horizontal cross-section of the inner hole 110 is elliptical, and its length extends along the width direction of the fixing plate 100.

[0087] Specifically, see Figures 2 to 4 Two elliptical inner holes 110 are arranged parallel to each other along the length of the fixing plate 100.

[0088] In another embodiment, the inner hole 110 includes a first hole area 111 and a second hole area 112 arranged along the width direction of the fixing plate 100, and the first hole area 111 and the second hole area 112 are connected; the two inner holes 110 are arranged opposite to each other.

[0089] Specifically, see Figure 8 and Figure 9 The horizontal cross-section of the inner hole 110 is cashew-shaped; or, see Figure 10 and Figure 11 The horizontal cross-section of the 110mm inner hole is heart-shaped.

[0090] See Figure 12 A strength comparison test was conducted on the fixation plate 100 with an inner hole 110 in the shapes of an ellipse, cashew nut, and heart, and the titanium plate in the prior art. According to the experimental results, the fixation strength of the fixation plate 100 with an inner hole 110 in the shapes of an ellipse, cashew nut, and heart is significantly higher than that of the titanium plate in the prior art, which enhances the mechanical strength of the fixation system and can provide a more stable fixation foundation for ligament reconstruction.

[0091] In an optional embodiment of this utility model, the adjacent outer holes 120 and inner holes 110 are connected.

[0092] Specifically, the adjacent outer holes 120 and inner holes 110 are connected, so that the horizontal cross section is clover-shaped (the attached figure of this embodiment is not included); the horizontal cross section size of the connecting gap between the outer holes 120 and the inner holes 110 is much smaller than the horizontal cross section size of the inner hole 110 and the horizontal cross section size of the outer hole 120, so as to avoid the problem of increased friction caused by the interlacing of the seams in the outer holes 120 and the inner holes 110.

[0093] The adjacent outer hole 120 and inner hole 110 are connected, increasing the space of the inner hole 110, which is conducive to tightening with one hand and reducing the operation time.

[0094] In the optional embodiments of this utility model, see Figure 7 The fixing system includes a sixth transition surface 260, which is located between the side wall of the outer hole 120 and the surface of the fixing plate 100, and is located on the outer periphery of the outer hole 120.

[0095] Specifically, the sidewall of the outer hole 120 is connected to the first surface 130 and the second surface 140 of the fixing plate 100 through the sixth transition surface 260, and the vertical cross section of the sixth transition surface 260 is a straight line or an arc.

[0096] The sixth transition surface 260 serves to prevent cutting, reduces stress concentration points, thereby enhancing the mechanical strength of the fixation system and providing a more stable fixation foundation for ligament reconstruction.

[0097] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0098] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fixed system, characterized in that, include: Fixing plate (100); An inner hole (110) is provided in the fixing plate (100); An outer hole (120) is provided on the fixing plate (100) and spaced apart from the inner hole (110); The first transition surface (210) is disposed between the side wall of the inner hole (110) and the surface of the fixing plate (100), and is located on the outer periphery of the inner hole (110).

2. The fixing system according to claim 1, characterized in that, The fixed system includes: A first surface (130) is provided on the fixing plate (100); The second surface (140) is provided on the fixing plate (100) and is opposite to the first surface (130). The inner hole (110) and the outer hole (120) both pass through the fixing plate (100) from the first surface (130) to the second surface (140). A first groove (150) is provided on the first surface (130) and communicates with the inner hole (110); The second groove (160) is provided on the second surface (140) and communicates with the inner hole (110).

3. The fixing system according to claim 2, characterized in that, The position of the second groove (160) corresponds to the position of the first groove (150).

4. The fixing system according to claim 2, characterized in that, The fixed system includes: The second transition surface (220) is disposed between the side wall of the first groove (150) and the first surface (130) of the fixing plate (100), and is located on the outer periphery of the first groove (150); And / or, a third transition surface (230) is provided between the sidewall of the second groove (160) and the second surface (140) of the fixing plate (100), and is located on the outer periphery of the second groove (160).

5. The fixing system according to claim 4, characterized in that, The fixed system includes: The fourth transition surface (240) is provided at the connection between the side wall of the inner hole (110) and the side wall of the first groove (150); And / or, a fifth transition surface is provided at the junction of the sidewall of the inner hole (110) and the sidewall of the second groove (160).

6. The fixing system according to claim 1, characterized in that, The fixed system includes: The sixth transition surface (260) is provided between the side wall of the outer hole (120) and the surface of the fixing plate (100), and is located on the outer periphery of the outer hole (120).

7. The fixing system according to claim 1, characterized in that, The horizontal cross-section of the outer hole (120) is pear-shaped, with a larger diameter at the end near the inner hole (110) and a smaller diameter at the end away from the inner hole (110).

8. The fixing system according to any one of claims 1-7, characterized in that, Both the inner hole (110) and the outer hole (120) are provided in two parts; The two outer holes (120) and the two inner holes (110) are all spaced apart along the length of the fixing plate (100), and the two inner holes (110) are located between the two outer holes (120); On the same surface of the fixing plate (100), the same inner hole (110) connects two grooves, and the two grooves are spaced apart along the width direction of the fixing plate (100).

9. The fixing system according to claim 8, characterized in that, The fixed system includes: A symmetry line is provided on the fixed plate (100) and perpendicular to the length direction of the fixed plate. The two inner holes (110) are symmetrically arranged about the symmetry line, and the two outer holes (120) are symmetrically arranged about the symmetry line.

10. The fixing system according to claim 9, characterized in that, The inner hole (110) includes a first hole area (111) and a second hole area (112) arranged along the width direction of the fixing plate (100), and the first hole area (111) and the second hole area (112) are connected; the two inner holes (110) are arranged opposite to each other.

11. The fixing system according to claim 8, characterized in that, The adjacent outer hole (120) and the inner hole (110) are connected.

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