Hybrid compression locking bone connection system and mating driver

Abstract

The application discloses a mixed pressure locking bone connecting system and a matched screwdriver, and belongs to the technical field of medical devices. The bone connecting system comprises a bone plate, a fixing needle and a locking joint. The bone plate is provided with a locking hole. The fixing needle is provided with a needle tip part and a rod part along the axial direction. The needle tip part is in a pyramid structure. The locking joint is provided with a through hole. The locking joint is sleeved on the rod part through the through hole. The fixing needle is locked with the locking hole through the locking joint. The screwdriver is used for installing or dismounting the mixed pressure locking bone connecting system. The thinner fixing needle is locked with the bone plate through the locking joint, so that a reliable structure is formed. The bone at the fracture part can be pre-positioned. The stability of the fracture reduction can be effectively maintained. The secondary displacement of the fracture can be prevented when the screw is used to lock the bone plate and the bone. Since the damage of the thinner fixing needle to the bone is far less than that of the screw, the thinner fixing needle can be used to better adjust the setting position of the bone plate on the bone, and a larger trauma can not be left on the bone.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fracture fixation for medical use, in particular to a mixed pressurized locking bone connecting system and a matched driver. BACKGROUND

[0002] During surgery, doctors use bone plate screw systems to reconstruct the stability of the fracture site; when the relative position of the bone plate and screw to the bone is in an ideal state, the bone plate screw system can better maintain the stability of the fracture, which is conducive to the early functional exercise of the patient after surgery and promotes the recovery of limb function. However, it is very difficult to place the bone plate and screw in the appropriate position of the bone during surgery, and the relative position of the bone plate to the bone and the position of the screw in the bone are often poor.

[0003] Doctors can easily find that the relative position of the bone plate to the bone and the position of the screw in the bone are poor, but in clinical practice, doctors are usually reluctant to adjust the position of the bone plate and screw, and are concerned about the following: 1. Adjusting the position of the bone plate and screw to the bone will increase the operation time and trauma; 2. There is a great risk in adjusting the position of the bone plate and screw to the bone, because the bone position suitable for implanting the screw is very limited, and repeatedly punching holes and implanting screws on a limited bone surface will cause greater damage to the local bone, and sometimes even affect the reliability of the final bone plate screw fixation of the fracture.

[0004] Therefore, in view of the above-mentioned technical problems, it is necessary to propose a new technical solution. SUMMARY

[0005] The present application aims to solve the technical problems existing in the background art and provide a mixed pressurized locking bone connecting system, which locks and connects the thinner fixing needle and the bone plate through the lock joint to form a reliable structure, can pre-position the bone at the fracture site, effectively maintain the stability of the fracture reduction, and prevent the secondary displacement of the fracture when the screw is used to lock the bone plate and the bone. The operator can better adjust the setting position of the bone plate on the bone with the thinner fixing needle, and will not leave a large trauma on the bone. The present application also provides a driver that can install or dismount the mixed pressurized locking bone connecting system.

[0006] To achieve the purpose of the present application, the present application provides a mixed pressurized locking bone connecting system, which comprises a bone plate, a fixing needle and a lock joint, the bone plate is provided with a lock hole, the fixing needle has a needle tip part and a rod part along the axial direction respectively, the needle tip part is a pyramid structure, the lock joint is provided with a through hole, the lock joint is sleeved on the rod part through the through hole, and the fixing needle is locked with the lock hole through the lock joint.

[0007] Further, a first thread is arranged on the rod portion.

[0008] Further, one end of the lock joint hole has a smaller diameter than the other end; the lock joint comprises a first lock joint, a first through hole is arranged in the first lock joint, an inner wall of the first through hole is provided with a second thread matched with the first thread, and the first thread and the second thread are threadedly connected when the first lock joint is sleeved on the rod portion.

[0009] Further, an inner wall of the lock joint hole is provided with a third thread.

[0010] Further, the lock joint comprises a second lock joint, the second lock joint comprises a lock joint body and a lock joint ring, a second through hole is arranged in the lock joint body, an outer surface of the lock joint body is provided with a fourth thread matched with the third thread, the second lock joint is arranged in the lock joint hole, the fourth thread and the third thread are threadedly connected, an inner wall of the second through hole is provided with an annular clamping groove, an axis direction of the annular clamping groove is consistent with an axis direction of the second through hole, the lock joint ring is arranged in the annular clamping groove, a notch is arranged on the lock joint ring, the annular clamping groove is provided with a clamping convex at a position corresponding to the notch, and an inner wall of the lock joint ring is provided with a fifth thread.

[0011] Further, the lock joint comprises a third lock joint, a third through hole is arranged in the third lock joint, and a sixth thread is arranged on an outer surface of the third lock joint; the third lock joint is arranged in the lock joint hole, the sixth thread and the third thread are threadedly connected; or the third lock joint is arranged in the second through hole, and the sixth thread and the fifth thread are threadedly connected.

[0012] Further, a first gap is arranged on the third lock joint, and the first gap is communicated with the third through hole.

[0013] Further, the third lock joint has a conical frustum structure or a cylindrical structure.

[0014] Further, one end of the lock joint is provided with a recess structure or a protruding structure with a specified shape, and the through hole penetrates the recess structure or the protruding structure.

[0015] Further, a seventh thread is arranged on the rod portion, the seventh thread is arranged close to the needle tip portion; and / or a scale is arranged on the rod portion.

[0016] Further, the locking hole comprises a first hole part and a second hole part, the third thread is arranged on the inner wall of the second hole part, the first hole part and the second hole part are distributed along the surface of the bone plate, and the first hole part and the second hole part are communicated; or the first hole part and the second hole part are distributed along the thickness of the bone plate, and the first hole part and the second hole part are communicated.

[0017] Further, the limiting chuck further comprises a fourth through hole arranged in the limiting chuck, and a second gap is arranged on the limiting chuck and communicated with the fourth through hole.

[0018] The application further provides a screw matched with the bone connecting system of the mixed pressure locking, which is a hollow structure comprising a handle and a screw rod part, and a limiting structure matched with the groove structure or the convex structure on the locking joint is arranged at the end of the screw rod part.

[0019] Further, a third gap is arranged on the limiting structure, and the limiting structure is dynamically matched with the groove structure or the convex structure.

[0020] Compared with the prior art, the application has at least one or more beneficial effects as follows:

[0021] 1. After the fracture is temporarily fixed by the reduction forceps, the Kirschner wire and the like, if it is found that the reduction of the fracture of the bone is still slightly poor, the first fixing needle, the first locking joint and the bone plate can be used to pull and reset the fracture.

[0022] 2. After the fracture is temporarily fixed by the reduction forceps, the Kirschner wire and the like, the doctor can punch the fixing needle on both sides of the fracture of the bone, which has little influence on the stability of the fracture, and can effectively avoid the secondary displacement of the fracture in the process of implanting the first or second screw.

[0023] 3. The mixed pressure locking bone connecting system locks and connects the fixing needle and the bone plate through the locking joint to form a reliable structure between the fractures of the bone, and effectively maintains the stability of the fracture reduction; this stable structure can effectively resist a series of external forces generated in the process of further implanting the screw by the doctor, avoids the secondary displacement of the fracture, is beneficial to the doctor to judge the position of the fracture reduction, the internal fixation, the state of the important nerves and blood vessels and the like according to experience, and is also beneficial to the placement of various perspective positions of the limbs to evaluate the fracture reduction and the position of the internal fixation.

[0024] 4. When it is found that the fracture reduction and the position of the internal fixation are poor during the operation, since the fixing needle punched into the bone is thin and has little trauma to the bone, the doctor can repeatedly adjust the fixing position of the fixing needle in the bone until the fracture is well reset and the relative position of the internal fixation and the bone is in a good state.

[0025] 5. By setting the second locking joint in the second locking hole of the bone plate, the second locking hole of the bone plate can be converted into a universal nail hole. The locking ring built in the second locking joint can swing in the annular groove of the locking joint body, and the position of the fixing needle in the bone can be further adjusted when the position of the fixing needle in the bone is found to be poor during the operation, laying a good foundation for the determination of the best position of the screw in the bone.

[0026] 6. When treating fractures involving the epiphysis of children, when the Kirschner wire cannot effectively stabilize the common fracture site, the second locking joint and the third locking joint of the present application are used to lock and connect the fixing needle, the bone plate and the bone, forming a reliable structure between the bone plate and the bone on both ends of the fracture, reconstructing the stability of the fracture site, avoiding external fixation with plaster or brace, improving the comfort of the child after the operation, reducing the difficulty of postoperative care and rehabilitation of the child, and reducing the risk of postoperative internal fixation failure. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The first fixing needle, the first locking joint and the bone plate provided by the embodiment of the present application are shown in the installation position diagram;

[0028] Figure 2 The structure diagram of the first fixing needle provided by the embodiment of the present application is shown;

[0029] Figure 3 The structure diagram of the second fixing needle provided by the embodiment of the present application is shown;

[0030] Figure 4 The structure diagram of the second fixing needle provided by the embodiment of the present application is shown;

[0031] Figure 5 The structure diagram of the bone plate provided by the embodiment of the present application is shown;

[0032] Figure 6 And Figure 7 The structure diagram of the two first locking joints provided by the embodiment of the present application is shown;

[0033] Figure 8 The installation position diagram of the first fixing needle, the first locking joint, the bone plate and the bone provided by the embodiment of the present application is shown;

[0034] Figure 9 The cross-sectional view of the first locking joint in the first locking hole of the bone plate provided by the embodiment of the present application is shown;

[0035] Figure 10 The installation position diagram between the first locking joint and the first fixing needle provided by the embodiment of the present application is shown;

[0036] Figure 11 AndFigure 12 Structure diagram of two second lock joints provided for the embodiments of the present application;

[0037] Figure 13 and Figure 14 Structure diagram of two third lock joints provided for the embodiments of the present application;

[0038] Figure 15 Installation position diagram between the second fixing needle, the third lock joint, the bone plate and the bone provided for the embodiments of the present application;

[0039] Figure 16 Installation position diagram between the second lock joint and the third lock joint provided for the embodiments of the present application;

[0040] Figure 17 Installation position diagram between the second fixing needle, the second lock joint and the third lock joint provided for the embodiments of the present application;

[0041] Figure 18 Installation position diagram between the second fixing needle, the second lock joint, the third lock joint and the bone plate provided for the embodiments of the present application;

[0042] Figure 19 Installation position diagram between the second fixing needle, the second lock joint, the third lock joint, the bone plate and the bone provided for the embodiments of the present application;

[0043] Figure 20 Structure diagram of the limiting chuck provided for the embodiments of the present application;

[0044] Figure 21 Structure diagram of the screwdriver provided for the embodiments of the present application.

[0045] Wherein, 1-bone plate, 11-first locking hole, 12-second locking hole, 121-third thread, 13-first hole part, 14-second hole part, 2-fixing needle, 21-first fixing needle, 22-second fixing needle, 23-needle tip part, 24-shaft part, 25-first thread, 26-seventh thread, 3-first locking head, 31-first through hole, 32-second thread, 33-first groove structure, 34-first protrusion structure, 4-second locking head, 41-locking head body, 411-fourth thread, 412-ring-shaped clamping groove, 413-clamping protrusion, 42-locking ring, 421-gap, 422-fifth thread, 43-second through hole, 44-second groove structure, 45-second protrusion structure, 5-third locking head, 51-third through hole, 52-sixth thread, 53-first gap, 54-third groove structure, 55-third protrusion structure, 6-limiting clamp, 61-clamping part, 62-limiting part, 63-fourth through hole, 64-second gap, 7-screwdriver, 71-handle, 72-screwdriver shaft part, 73-limiting structure, 74-third gap, 8-bone. DETAILED DESCRIPTION

[0046] In order to further clarify the technical means and effects taken by the present application to achieve the predetermined object of the application, the specific embodiments, structures, features and effects thereof according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0047] As shown in Figure 1 , Figure 8 , Figure 15 , Figure 18 or Figure 19 , the present application discloses a mixed pressure locking bone connecting system, which comprises a bone plate 1, a fixing needle 2 and a locking head. The bone plate 1 is provided with a locking hole. The fixing needle 2 has a needle tip part 23 and a shaft part 24 along the axial direction respectively. The needle tip part 23 is a pyramid structure, such as a triangular pyramid, a quadrangular pyramid or other polygonal pyramid, etc. The conical end of the needle tip part 23 can be blunt, which is beneficial to protect the important tissues around the bone 8. The conical end of the needle tip part 23 can also be sharp, which is more beneficial to the penetration of the fixing needle 2 into the bone 8. Further, the surface of the shaft part 24 of the fixing needle 2 can also be provided with a scale to assist the operator to judge the depth of the fixing needle 2 penetrating into the bone 8.

[0048] The fixing needle 2 has a fast implantation speed and small damage to the bone 8, which lays a foundation for repositioning the fracture and adjusting the positional relationship between the bone 8 and the bone plate 1, and is helpful to improve the operation quality, so the fixing needle 2 becomes the best choice to replace the screw.

[0049] The fixing needle 2 can be a needle-shaped structure with a thread on the surface, which is defined as a first fixing needle 21. As shown in Figure 2As shown, a thread is provided on a portion of the surface of the rod portion 24, which is defined as a first thread 25. The other unthreaded portions of the rod portion 24 may or may not be smooth, but are preferably not smooth.

[0050] The fixing pin 2 can also be a needle-like structure without threads on its surface, defined as the second fixing pin 22, such as... Figure 3 As shown. The surface of its rod portion 24 may be smooth or not smooth, but is preferably not smooth.

[0051] Furthermore, the first fixing pin 21 or the second fixing pin 22 may have a thread on the surface of its shank 24 near the pin tip 23, defined as the seventh thread 26, such as... Figure 2 and Figure 4 As shown, this is to increase the riveting effect of the first fixing pin 21 or the second fixing pin 22 in the bone 8.

[0052] The bone plate 1 is provided with two types of locking holes, which are defined as the first locking hole 11 and the second locking hole 12, respectively. Figure 5 As shown.

[0053] The inner wall of the first locking hole 11 is not provided with a thread, as a non-locking hole. The first locking hole 11 penetrates both sides of the bone plate 1 along its thickness direction, and the diameter of one end of the first locking hole 11 is smaller than the diameter of the other end, forming a frustum-shaped hole structure. In a specific implementation, the side of the first locking hole 11 with the smaller diameter faces the bone 8. The locking connector includes a first locking connector 3, the outer diameter of one end of the first locking connector 3 being smaller than the outer diameter of the other end, such as... Figure 6 As shown, preferably, the area between the two ends of the first locking connector 3 is an arc-shaped structure. The end face of the first locking connector 3 with the larger outer diameter is provided with a groove structure of a predetermined shape, defined as the first groove structure 33, for example... Figure 6 The hexagonal groove shown, or other similar groove structures such as prism, plum blossom, star, or cross shapes, can be manipulated using a special screwdriver 7. Alternatively, the end face of the larger outer diameter end of the first locking connector 3 is provided with a protrusion structure of a predetermined shape, defined as the first protrusion structure 34, for example... Figure 7 The hexagonal protrusion shown, or other similar protrusions such as prism, plum blossom, star, or cross shapes, can be manipulated using a special screwdriver 7. By providing the first groove structure 33 or the first protrusion structure 34 at one end of the first locking connector 3, the first locking connector 3 can be rotated using a special screwdriver 7.

[0054] The first locking connector 3 is a hollow structure with a built-in through hole, defined as the first through hole 31. The first through hole 31 penetrates the first groove structure 33 or the first protrusion structure 34, such as... Figure 6 andFigure 7 The inner wall of the first through hole 31 is provided with a second thread 32. The second thread 32 and the first thread 25 have the same pitch and outer diameter, that is, the second thread 32 matches the first thread 25. In the specific implementation, the bone plate 1 is placed on the bone 8 to be operated, then the needle tip 23 of the first fixation needle 21 is inserted into the bone 8 through the first locking hole 11, and then the first locking head 3 is sleeved on the rod portion 24 of the first fixation needle 21, the end of the first locking head 3 with a smaller outer diameter faces the bone plate 1, and the first thread 25 and the second thread 32 are threadedly connected, as shown in Figure 1 and Figure 8 to Figure 10 By rotating the first locking head 3 on the first fixation needle 21, the first locking head 3 is gradually placed in the first locking hole 11, and the first locking head 3 is similar to the head of a cortical bone screw. With further tightening, the first locking head 3 locks the fixation needle and the first locking hole 11, and the first locking head 3 realizes the compression function of a tension screw, and the bone plate 1 is attached to the bone 8.

[0055] The inner wall of the second locking hole 12 is provided with a thread, defined as a third thread 121, as a locking hole As shown in Figure 5 The second locking hole 12 penetrates through both sides of the thickness direction of the bone plate 1. One end of the first locking hole 11 has a smaller hole diameter than the other end, that is, a conical frustum-shaped threaded hole structure is formed. In the specific implementation, the side of the second locking hole 12 of the bone plate 1 with a smaller hole diameter faces the bone 8. Alternatively, the first locking hole 11 is a cylindrical threaded hole structure.

[0056] The locking head includes a second locking head 4, and the second locking head 4 includes a locking head main body 41 and a locking ring 42, as shown in Figure 11The second locking joint 4 is arranged in the second locking hole 12, and the fourth thread 411 and the third thread 121 are threadedly connected, thereby transforming the second locking hole 12 into a universal nail hole. Since the C-shaped locking ring 42 is arranged in the locking joint main body 41, when the locking member such as a screw is locked with the second locking joint 4, the locking member is threadedly connected with the locking ring 42, and since the locking ring 42 can swing in the annular clamping groove 412, when the locking member is screwed with the second locking hole 12, the locking member does not need to keep consistent with the axial direction of the second locking hole 12, and can be skewed at an angle in any direction, which can adapt to a relatively complex operation environment to a certain extent. One end surface of the second locking joint 4 is provided with a recess structure of a set shape, which is defined as a second recess structure 44, such as a hexagonal recess as shown in FIG. 6, or other similar recess structures such as prismatic, plum blossom, star, cross, etc. which can be operated by a special driver 7. Alternatively, one end surface of the second locking joint 4 is provided with a protruding structure of a set shape, which is defined as a second protruding structure 45, such as a hexagonal protrusion as shown in FIG. 7, or other similar protruding structures such as prismatic, plum blossom, star, cross, etc. which can be operated by a special driver 7. Figure 11 Alternatively, one end surface of the second locking joint 4 is provided with a protruding structure of a set shape, which is defined as a second protruding structure 45, such as a hexagonal protrusion as shown in FIG. 7, or other similar protruding structures such as prismatic, plum blossom, star, cross, etc. which can be operated by a special driver 7. Figure 12hexagonal protrusion shown in FIG. 6, or other protrusion structures such as prismatic, plum blossom, star, cross, and other similar protrusion structures that can be operated by the special driver 7. The second through hole 43 penetrates the second groove structure 44 or the second protrusion structure 45. It should be noted that when the lock joint body 41 is a hollow conical frustum structure, the second groove structure 44 or the second protrusion structure 45 is arranged at the end of the lock joint body 41 with a larger outer diameter. By arranging the second groove structure 44 or the second protrusion structure 45 at one end of the second lock joint 4, the second lock joint 4 can be rotated by using the special driver 7 to be installed in the second lock hole 12 or removed from the second lock hole 12.

[0057] The lock joint includes a third lock joint 5, which is a hollow structure with a through hole arranged therein, and the through hole is defined as a third through hole 51, as shown in Figure 13 and Figure 14 The inner surface of the third through hole 51 can be smooth, non-smooth, partially smooth, or partially non-smooth. The diameter of the third through hole 51 is greater than or equal to the outer diameter of the fixed needle 2. The third lock joint 5 is a hollow conical frustum structure or a hollow cylindrical structure. The outer surface of the third lock joint 5 is provided with a sixth thread 52. The sixth thread 52 can be distributed on the entire outer surface of the third lock joint 5, or can only cover part of the outer surface of the third lock joint 5.

[0058] The third lock joint 5 is provided with a first gap 53, which communicates with the third through hole 51. The number of the first gap 53 is greater than or equal to 1, and at least one of the first gap 53 penetrates one end or both ends of the third lock joint 5 in the axial direction. The length direction of the first gap 53 can be consistent with the axial direction of the third lock joint 5, or can be inconsistent, that is, a certain angle is formed between the first gap 53 and the axial direction of the third lock joint 5. One end surface of the third lock joint 5 is provided with a groove structure of a certain shape, which is defined as a third groove structure 54, such as Figure 13 hexagonal groove shown in FIG. 6, or other groove structures such as prismatic, plum blossom, star, cross, and other similar groove structures that can be operated by the special driver 7. Alternatively, one end surface of the third lock joint 5 is provided with a protrusion structure of a certain shape, which is defined as a third protrusion structure 55, such as Figure 14hexagonal protrusion, or other protrusion structure such as prism, plum blossom, star, cross, etc. capable of being operated by the special driver 7. The third through hole 51 penetrates the third groove structure 54 or the third protrusion structure 55. It is to be noted that when the third lock joint 5 is a hollow conical structure, the third groove structure 54 or the third protrusion structure 55 is arranged at the end of the third lock joint 5 with larger outer diameter.

[0059] The third lock joint 5 can be directly arranged in the second lock joint hole 12, as shown in Figure 15 The third lock joint 5 can also be arranged in the second through hole 43 of the second lock joint 4 and locked with the lock ring 42, as shown in Figure 16 When the third lock joint 5 is arranged in the second lock joint hole 12, the sixth thread 52 is threadedly connected with the third thread 121. The third lock joint 5 is a hollow conical structure, and the second lock joint hole 12 can be a cylindrical threaded hole structure or a conical threaded hole structure, but the slope of the side wall of the third lock joint 5 is larger than the slope of the outer wall of the third lock joint 5. Alternatively, the third lock joint 5 is a hollow cylindrical structure, and the second lock joint hole 12 can be a conical threaded hole structure. When the second lock joint 4 is installed in the second lock joint hole 12 by rotating the special driver 7, the third lock joint 5 will shrink, thereby clamping the fixing needle 2 in the third through hole 51, as shown in Figure 15 When the third lock joint 5 is arranged in the second through hole 43 of the second lock joint 4, the sixth thread 52 is threadedly connected with the fifth thread 422. The third lock joint 5 is a hollow conical structure, and when the third lock joint 5 is screwed with the lock ring 42 by rotating the special driver 7, the third lock joint 5 will shrink, thereby clamping the fixing needle 2 in the third through hole 51, as shown in Figure 17 to Figure 19 When the third lock joint 5 is arranged in the second through hole 43 of the second lock joint 4, the sixth thread 52 is threadedly connected with the fifth thread 422. The third lock joint 5 is a hollow conical structure, and when the third lock joint 5 is screwed with the lock ring 42 by rotating the special driver 7, the third lock joint 5 will shrink, thereby clamping the fixing needle 2 in the third through hole 51, as shown in

[0060] The third lock joint 5 is preferably made of a memory alloy material. When the third lock joint 5 is locked in the second lock joint hole 12 or the lock ring 42 of the second lock joint 4, it will deform and shrink, and when it is removed from the second lock joint hole 12 or the lock ring 42 of the second lock joint 4, it can return to the initial state.

[0061] It is to be noted that when the first thread 25, the second thread 32, the third thread 121, the fourth thread 411, the fifth thread 422, the sixth thread 52 and the seventh thread 26 are threadedly connected, at least one of the two threads connected is a conical thread.

[0062] The locking hole on the bone plate 1 can also be a combination of the first locking hole 11 and the second locking hole 12, including a first hole portion 13 and a second hole portion 14, wherein the first hole portion 13 and the second hole portion 14 are connected, and the third thread 121 is disposed on the inner wall of the second hole portion 14. The arrangement of the first hole portion 13 and the second hole portion 14 can be as follows: Figure 5 The figure-eight holes shown on the left, with the first hole 13 and the second hole 14 distributed along the surface of the bone plate 1, can also be as follows: Figure 5 The leftmost example shown is a superimposed hole, with the first hole portion 13 and the second hole portion 14 distributed along the thickness of the bone plate 1, and the second hole portion 14 located on the side closer to the bone 8.

[0063] The hybrid pressure locking bone connection system of this embodiment also includes a limiting clamp 6, such as Figure 20 As shown. A fourth through hole 63 is provided inside the limiting clamp 6. The outer surface of the limiting clamp 6 is preferably not smooth. The inner surface of the limiting clamp 6 is preferably not smooth. The diameter of the fourth through hole 63 is greater than or equal to the outer diameter of the fixing pin 2. A second gap 64 is provided on the limiting clamp 6, and the second gap 64 communicates with the fourth through hole 63. The number of second gaps 64 is greater than or equal to one, and at least one second gap 64 penetrates one or both ends of the limiting clamp 6 along its axial direction. The length direction of the second gap 64 may be consistent with or inconsistent with the axial direction of the limiting clamp 6, that is, the second gap 64 forms a certain angle with the axis of the limiting clamp 6.

[0064] Furthermore, the limiting clamp 6 includes a clamping part 61 and a limiting part 62 along the axial direction. The cross-sectional shape of the clamping part 61 is a predetermined shape, such as a polygon like a triangle or quadrilateral, or other irregular shapes. In specific implementation, the rod part 24 of the fixing pin 2 is inserted into the fourth through hole 63 from one end of the limiting part 62 of the limiting clamp 6. The electro-rotating clamp clamps the clamping part 61 of the limiting clamp 6, causing the limiting clamp 6 to deform and contract, thereby clamping the fixing pin 2 inserted into the fourth through hole 63, so that the fixing pin 2 can be rotated when the electro-rotating clamp rotates. By selecting different lengths of the limiting clamp 6, or adjusting the clamping length of the fixing pin 2 in the limiting clamp 6, the length of the fixing pin 2 protruding from the limiting clamp 6 can be controlled, and thus the depth of the fixing pin 2 inserted into the bone 8 can be controlled when using an electro-rotator to insert the fixing pin 2 into the bone 8.

[0065] This embodiment also provides a screwdriver 7 compatible with the aforementioned hybrid pressure locking bone connection system, such as... Figure 21As shown, it is a hollow structure, including a handle 71 and a lever 72. The end of the lever 72 is provided with a limiting structure 73 matched with the groove structure or protruding structure on the lock joint, such as the fourth protruding structure matched with the first groove structure 33, the second groove structure 44 or the third groove structure 54; or the fourth groove structure matched with the first protruding structure 34, the second protruding structure 45 or the third protruding structure 55, that is, the end of the lever 72 is sleeve-shaped. The inner cavity of the lever 7 penetrates the fourth protruding structure or the fourth groove structure. When disassembling the first lock joint 3, the second lock joint 4 or the third lock joint 5, the fourth protruding structure on the lever 7 is inserted into the corresponding groove structure, or the fourth groove structure on the lever 7 is sleeved on the corresponding protruding structure, and then the lever 7 is rotated along the axis.

[0066] Further, the limiting structure 73 is provided with a third gap 74. The third gap 74 is in communication with the inner cavity of the lever 7. The number of the third gap 74 is greater than or equal to 1, and at least one of the third gap 74 penetrates one end of the limiting structure 73 in the axial direction. The length direction of the second gap 64 can be consistent with the axial direction of the limiting structure 73, or it can not be consistent, that is, a certain angle is formed between the third gap 74 and the axis of the limiting structure. When the third lock joint 5 is disassembled by using the above-mentioned lever 7, the limiting structure 73 can be shrunk with the shrinkage of the third lock joint 5, forming a dynamic matching.

[0067] The technical scheme in the application can be applied to various fracture treatments, especially for fracture treatment in the application of bone plates and the like. The use process of the device in the application in the fracture surgery of the diaphyseal part will be described in detail as follows:

[0068] First step, according to the standard surgical procedure, disinfect and lay the single, and expose the fracture according to the standard surgical approach, reduce and temporarily fix the fracture by using the Kirschner wire, and confirm the good reduction of the fracture by fluoroscopy;

[0069] Second step, the first fixing pin 21 is punched into the bone 8 through the first lock hole 11 on the bone plate 1, and then the limiting structure 73 of the matched lever 7 is matched with the first groove structure 33 or the first protruding structure 34 of the first lock joint 3, the first perforation 31 of the first lock joint 3 is operated to pass through the first fixing pin 21 in the first lock hole 11, and then the lever 7 is rotated, the first lock joint 3 is synchronously rotated, until the first lock joint 3 is screwed in the first lock hole 11, the bone plate 1 is adhered to the bone 8;

[0070] Third step, the second fixation needle 22 or the second fixation needle 22 is punched through the second locking hole 12 on the bone plate 1, and then the limiting structure 73 of the matching screwdriver 7 is matched with the third groove structure 54 or the third convex structure 55 of the third locking joint 5, the third perforation 51 of the third locking joint 5 is operated to pass through the first fixation needle 21 or the second fixation needle 22 in the second locking hole 12, then the screwdriver 7 is rotated, the third locking joint 5 is rotated synchronously, the sixth thread 52 outside the third locking joint 5 is matched with the third thread 121 in the second locking hole 12, and as the third locking joint 5 rotates in the second locking hole 12, the third locking joint 5 gradually shrinks, thereby causing the aperture of the third perforation 51 to become smaller, so that the third locking joint 5 tightly clamps the first fixation needle 21 or the second fixation needle 22; or

[0071] The limiting structure 73 of the matching screwdriver 7 is matched with the second groove structure 44 or the second convex structure 45 of the second locking joint 4, the second perforation 43 of the second locking joint 4 is operated to pass through the first fixation needle 21 or the second fixation needle 22 in the second locking hole 12, then the screwdriver 7 is rotated, the third locking joint 5 is rotated synchronously, until the second locking joint 4 is screwed in the second locking hole 12. Then the third locking joint 5 is screwed in the clamping ring of the second locking joint 4 by the matching screwdriver 7, so that the third locking joint 5 tightly clamps the first fixation needle 21 or the second fixation needle 22. In this way, the mixed pressurized locking bone connecting system locks and connects the fixation needle 2 and the bone plate 1 through the third clamp or the combination of the second clamp and the third clamp, forms a reliable structure between the bone plate 1 and the bones 8 at both ends of the fracture, and effectively maintains the stability of the fracture reduction;

[0072] Fourth step: the doctor observes the quality of the fracture reduction and the positional relationship between the bones 8 at both ends of the fracture and the bone plate 1 through perspective observation; when the doctor finds that the quality of the fracture reduction is poor and the positional relationship between the bones 8 at both ends of the fracture and the bone plate 1 is not good, a temporary plate is pre-fixed at other positions of the bone by using the above method for temporarily maintaining the state of the bones 8. Then the first locking joint 3, the second locking joint 4 and the third locking joint 5 are respectively untwisted by using the matching screwdriver 7, the bone plate 1 and the fixation needle 2 are released, and the fixation needle 2 in the inappropriate position is removed and a new fixation needle 2 is implanted in a new appropriate position. Then the above steps are repeated to lock and connect the fixation needle 2 and the bone plate 1 again; the quality of the fracture reduction is determined again through perspective observation, if it is poor, the position of the fixation needle 2 is continuously adjusted by repeating the above operation, until the quality of the fracture reduction is good and the positional relationship between the bones 8 at both ends of the fracture and the bone plate 1 is good;

[0073] Fifth step: remove the fixed needle 2 in turn, and after each fixed needle 2 is removed, the corresponding part of the bone is punched into a suitable diameter nail hole with a special rotating head, and then a screw of a suitable model and length is screwed in to lock the bone plate 1 and the bone 8;

[0074] Sixth step: re-verify the fracture reduction and internal fixation position by perspective, and then suture the skin after washing the wound and stopping bleeding.

[0075] Compared with the prior art, the application has at least one or more of the following beneficial effects:

[0076] 1. After temporary fixation of the fracture by reduction forceps, Kirschner wire, etc., if it is found that the reduction of the fracture of the bone is still slightly poor, the first fixed needle, the first locking joint and the bone plate can be used to pull and reset the fracture;

[0077] 2. After temporary fixation of the fracture by reduction forceps, Kirschner wire, etc., the doctor can punch the fixed needle into the fracture on both sides of the fracture, which has little effect on the stability of the fracture, and can effectively avoid the secondary displacement of the fracture during the implantation of the first or second screw;

[0078] 3. The mixed pressure locking bone connecting system locks and connects the fixed needle and the bone plate through the locking joint to form a reliable structure between the fractures of the bone, effectively maintaining the stability of the fracture reduction; this stable structure can effectively resist a series of external forces generated during the further implantation of the screw by the doctor, avoid the secondary displacement of the fracture, and be beneficial to the good judgment of the doctor according to experience, the position of the fracture reduction and internal fixation, the state of the surrounding important nerves and blood vessels, etc., and also be beneficial to the placement of various perspective positions of the limb to evaluate the fracture reduction and internal fixation position;

[0079] 4. When the fracture reduction and internal fixation position are found to be poor during the operation, since the fixed needle punched into the bone is thin and has little trauma to the bone, the doctor can repeatedly adjust the fixed position of the fixed needle in the bone until the fracture is well reduced and the relative position of the internal fixation and the bone is in a good state;

[0080] 5. By arranging the second locking joint in the second locking hole of the bone plate, the second locking hole of the bone plate can be converted into a universal nail hole, and the locking ring built in the second locking joint can swing in the annular groove of the locking joint main body, so that the position of the fixed needle in the bone can be further adjusted when the position of the fixed needle in the bone is found to be poor during the operation, and a good foundation is laid for the determination of the best position of the screw in the bone;

[0081] 6. When treating fractures involving the epiphysis of children, when the Kirschner wire cannot effectively stabilize the common fracture site, the fixed needle, bone plate and bone are locked and connected through the second and third locking joints of the application, forming a reliable structure between the bone plate and the bone on both ends of the fracture, reconstructing the stability of the fracture site, avoiding external fixation with plaster or brace, improving the comfort of the child after surgery, reducing the difficulty of postoperative care and rehabilitation of the child, and reducing the risk of postoperative internal fixation failure.

[0082] In this document, the terms "comprise", "contain", or any other variant thereof are intended to cover non-exclusive inclusion, in addition to containing the listed elements, other elements not explicitly listed can also be included.

[0083] In this document, the terms "comprise", "contain", or any other variant thereof are intended to cover non-exclusive inclusion, in addition to containing the listed elements, other elements not explicitly listed can also be included.

[0084] In the case of no conflict, the above-mentioned embodiments and features in the embodiments can be combined with each other.

[0085] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hybrid press-locked bone attachment system, comprising: It includes a bone plate (1), a fixing needle (2) and a locking joint, the locking hole is provided with a third thread (121) on the inner wall of the locking hole, the fixing needle (2) has a needle tip (23) and a rod (24) in the axial direction respectively, the needle tip (23) is a pyramid structure, the locking joint is provided with a through hole, the locking joint is sleeved on the rod (24) through the through hole, the rod (24) is provided with a first thread (25), the fixing needle (2) is locked with the locking hole through the locking joint; the locking joint is made of memory alloy, so that the connection between the locking joint and the locking hole is more reliable; The locking joint includes a second locking joint (4), the second locking joint (4) includes a locking joint body (41) and a locking ring (42), the second locking joint (4) is provided with a second through hole (43) in the locking joint body (41), the outer surface of the locking joint body (41) is provided with a fourth thread (411) matched with the third thread (121), the second locking joint (4) is arranged in the locking hole, the fourth thread (411) and the third thread (121) are threadedly connected, the inner wall of the second through hole (43) is provided with an annular clamping groove (412), the axis direction of the annular clamping groove (412) is consistent with the axis direction of the second through hole (43), the locking ring (42) is arranged in the annular clamping groove (412), the locking ring (42) is provided with a notch (421), the annular clamping groove (412) is provided with a clamping convex (413) corresponding to the position of the notch (421), the inner wall of the locking ring (42) is provided with a fifth thread (422); The locking joint includes a third locking joint (5), the third locking joint (5) is provided with a third through hole (51), and the outer surface of the third locking joint (5) is provided with a sixth thread (52); The third locking joint (5) is arranged in the second through hole (43), and the sixth thread (52) is threadedly connected with the fifth thread (422).

2. The hybrid press-locked bone attachment system according to claim 1, wherein, One end of the locking hole is smaller than the other end; The locking joint includes a first locking joint (3), the first locking joint (3) is provided with a first through hole (31), the inner wall of the first through hole (31) is provided with a second thread (32) matched with the first thread (25), and the first thread (25) and the second thread (32) are threadedly connected when the first locking joint (3) is sleeved on the rod (24).

3. The hybrid press-locked bone attachment system according to claim 1, wherein, The third locking joint (5) is provided with a first gap (53) communicating with the third through hole (51).

4. The hybrid press-locked bone joining system according to claim 1, wherein, The third locking joint (5) is in the shape of a circular truncated cone or a cylinder.

5. The hybrid press-locked bone joining system according to claim 1, wherein, One end of the locking joint is provided with a recess structure or a protruding structure of a specified shape, and the through hole penetrates the recess structure or the protruding structure.

6. The hybrid press-locked bone joining system according to claim 1, wherein, The rod (24) is provided with a seventh thread (26), and the seventh thread (26) is arranged close to the needle tip (23); and / or The rod (24) is provided with a scale.

7. The hybrid press-locked bone joining system according to claim 1, wherein, The locking hole comprises a first hole part (13) and a second hole part (14), the third thread (121) is arranged on the inner wall of the second hole part (14), The first hole part (13) and the second hole part (14) are distributed along the surface of the bone plate (1), and the first hole part (13) and the second hole part (14) are communicated; or The first hole part (13) and the second hole part (14) are distributed along the thickness of the bone plate (1), and the first hole part (13) and the second hole part (14) are communicated.

8. The hybrid press-locked bone joining system according to claim 1, wherein, It also comprises a limiting chuck (6), the limiting chuck (6) is provided with a fourth through hole (63) in it, and the limiting chuck (6) is provided with a second gap (64) on it, and the second gap (64) is communicated with the fourth through hole (63).

9. The hybrid press-locked bone joining system according to claim 1, wherein, It also comprises a pick, which is a hollow structure, and the pick comprises a handle (71) and a pick rod part (72), and the end of the pick rod part (72) is provided with a limiting structure (73) matched with the groove structure or the protruding structure on the locking head.

10. The hybrid press-locked bone attachment system according to claim 9, wherein, The limiting structure (73) is provided with a third gap (74), and the limiting structure (73) is dynamically matched with the groove structure or the protruding structure.

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