A bone implant aid

Abstract

The present invention discloses a bone implant assisting device, which relates to the technical field of medical devices and comprises: a pressure plate, a connecting handle and a sleeve, wherein the pressure plate and the sleeve are respectively connected to the two ends of the connecting handle and are arranged opposite to each other; the pressure plate is used to block the inner opening of the bone tunnel, the two ends of the sleeve are open and one end of the sleeve is used to align with the outer opening of the medullary canal, and the other end of the sleeve is used to extend into a pressing rod, so when the device is used to assist in pressing bone implanting, the bone implanting material can be prevented from being squeezed out from the inner opening of the bone tunnel, thereby the bone implanting material and the host bone can be pressed and compacted together well.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a bone implantation aid. Background Art

[0002] Anterior cruciate ligament injury is a relatively common orthopedic disease. In the United States alone, there are about 200,000 patients with anterior cruciate ligament injury each year. The accompanying knee stability is greatly reduced, affecting the patient's quality of life and exercise level. In addition, the injury will cause severe atrophy of the muscles of the affected lower limb, resulting in a further decrease in knee stability, increasing the chance of injury to other stable structures of the knee joint, and further accelerating the process of knee degenerative changes. Therefore, early anterior cruciate ligament reconstruction is urgent, but the incidence of graft failure after reconstruction is 2% to 28%, especially in young and active patients. Once the anterior cruciate ligament reconstruction surgery fails, the situation after the initial injury will occur again, and patients are generally recommended to undergo anterior cruciate ligament revision surgery. Depending on the size and position of the previous bone tunnel, as well as other factors such as the force line of the lower limb, cartilage and meniscus, and the preferences of the patient and surgeon, anterior cruciate ligament revision surgery can be divided into primary surgery and secondary surgery. Generally speaking, if the size or position of the previous bone tunnel prevents the placement and fixation of the graft, a secondary revision surgery is required. In the first stage of the second-stage revision surgery, the previous graft and fixation materials are removed and bone grafting is performed on the tunnel to provide sufficient bone bed for the second-stage reconstruction surgery. Usually after 4-6 months, the bone graft heals and the second-stage reconstruction surgery is performed.

[0003] However, during the first stage of bone grafting, since both ends of the enlarged bone tunnel are open, bone grafting materials such as autologous bone particles and allogeneic bone particles will be squeezed out from the other end of the bone tunnel after being pressed and implanted from one end of the bone tunnel. As a result, the bone grafting materials and the host bone cannot be pressed and compacted together well, resulting in insufficient bone grafting, which in turn affects the second stage of reconstructive surgery.

[0004] Therefore, how to provide a technology or device that can compress and graft bones in the enlarged tunnel in a simple and efficient manner to fully fill the bone tunnel and thus reduce the impact on further surgery is a technical problem that needs to be solved by those skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a bone grafting aid to solve the problems existing in the above-mentioned prior art, to simply and efficiently press the bone tunnel for bone grafting, and to prevent the bone grafting material from being squeezed out from the other end of the bone tunnel during pressing.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a bone grafting aid, comprising: a pressure plate, a connecting handle and a sleeve, wherein the pressure plate and the sleeve are respectively connected to the two ends of the connecting handle and are arranged opposite to each other; the pressure plate is used to block the inner opening of the bone tunnel, the two ends of the sleeve are open and one end of the sleeve is used to align with the outer opening of the medullary canal, and the other end of the sleeve is used to extend into a pressing rod.

[0008] Preferably, one end of the connecting handle is slidably connected to the sleeve along the axial direction of the sleeve, and the connecting handle and the sleeve can be locked and fixed by a locking device.

[0009] Preferably, the side of the pressure plate facing the medullary canal is an arc-shaped surface.

[0010] Preferably, the middle portion of the connecting handle is arc-shaped, and the end portion of the connecting handle used for connecting to the pressure plate is a straight end portion, and the axis of the straight end portion coincides with the central axis of the pressure plate.

[0011] Preferably, the sleeve is a cylindrical sleeve, a slide rail along the axial direction of the sleeve is arranged on the outer wall of the sleeve, a slider is arranged at one end of the connecting handle connected to the sleeve, and the slider is slidably connected to the slide rail.

[0012] Preferably, the slide rail is a slide groove arranged on the outer wall of the sleeve, the cross-section of the slide groove is trapezoidal, the large end of the slide groove is close to the sleeve, and the small end of the slide groove is an open end; the slider includes an inner part and an outer part, the inner part is clamped in the slide groove, the outer part is located outside the slide groove, the inner part and the outer part are fixedly connected, the outer part is fixedly arranged on the connecting handle, and the edge of the slide groove is clamped between the inner part and the outer part.

[0013] Preferably, the locking device includes a screw, which is inserted into the slider along an axial direction perpendicular to the sleeve, and the screw is threadedly connected to the slider. Rotating the screw can tighten the end of the screw without a nut against the inner wall of the sleeve.

[0014] Preferably, a bone grafting window is provided on the sleeve, and the bone grafting window is provided at an end of the sleeve away from the pressure plate.

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

[0016] The present invention provides a bone grafting auxiliary device, wherein a pressure plate is used to block the inner opening of a bone tunnel, both ends of a sleeve are open and one end of the sleeve is used to align with the outer opening of a medullary canal, and the other end of the sleeve is used to extend into a pressing rod; when in use, bone graft particles are placed in the sleeve, the sleeve is used to guide the bone graft particles into the medullary canal, and the pressing rod is used to gradually press and compact the bone graft particles. Because the pressure plate blocks the inner opening of the medullary canal, the bone graft particles will not be squeezed out of the inner opening of the medullary canal during the pressing and compacting process. Therefore, when the device is used to assist in pressing bone grafting, it is possible to prevent the bone graft material from squeezing out of the inner opening of the bone tunnel, thereby well pressing and compacting the bone graft material and the host bone together. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of the bone grafting aid provided by the present invention;

[0019] Figure 2 A schematic diagram of the structure of a sleeve, a slide rail and a slider in the bone grafting aid provided by the present invention;

[0020] In the figure: 100-bone grafting aid, 1-pressure plate, 2-connecting handle, 3-sleeve, 4-bone grafting window, 5-slide rail, 6-slider, 7-locking device, 8-open end. DETAILED DESCRIPTION

[0021] 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.

[0022] The purpose of the present invention is to provide a bone grafting aid to solve the problems existing in the prior art, to simply and efficiently compress the bone tunnel for bone grafting, and to prevent the bone grafting material from being squeezed out from the other end of the bone tunnel during compression.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] The present invention provides a bone grafting aid 100, such as Figures 1-2As shown, it includes: a pressure plate 1, a connecting handle 2 and a sleeve 3, the pressure plate 1 and the sleeve 3 are respectively connected to the two ends of the connecting handle 2 and are arranged opposite to each other; the pressure plate 1 is used to block the inner opening of the bone tunnel, the two ends of the sleeve 3 are open and one end of the sleeve 3 is used to align with the outer opening of the medullary canal, and the other end of the sleeve 3 is used to extend into the pressing rod. When in use, the bone graft particles are placed in the sleeve 3, and the sleeve 3 is used to introduce the bone graft particles into the medullary canal, and the bone graft particles are gradually pressed and compacted by the pressing rod. Because the pressure plate 1 blocks the inner opening of the medullary canal, the bone graft particles will not be squeezed out from the inner opening of the medullary canal during the pressing and compacting process. Therefore, when the device is used to assist in pressing the bone graft, the bone graft material can be prevented from being squeezed out from the inner opening of the bone tunnel, thereby well pressing and compacting the bone graft material and the host bone together.

[0025] Furthermore, the lengths of the bone tunnels of different patients are different. Therefore, in order to facilitate compression and bone grafting of different bone marrow canals, one end of the connecting handle 2 is slidably connected to the sleeve 3 along the axial direction of the sleeve 3 to adjust the distance between the sleeve 3 and the pressure plate 1. In addition, the connecting handle 2 and the sleeve 3 can be locked and fixed by a locking device 7. After the distance adjustment is completed, the locking device 7 is used to lock the sleeve 3 to the connecting handle 2.

[0026] Furthermore, the side of the compression plate 1 facing the medullary canal is an arc-shaped surface, which better fits the inner opening of the medullary canal and enhances the blocking effect.

[0027] Furthermore, the middle part of the connecting handle 2 is arc-shaped and is made of an arc-shaped column. The end of the connecting handle 2 used to connect to the pressure plate 1 is a straight end, and the axis of the straight end coincides with the central axis of the pressure plate 1. The connecting handle 2 under this structure can better press the pressure plate 1 against the inner opening of the medullary canal.

[0028] Furthermore, the sleeve 3 is a cylindrical sleeve 3 , a slide rail 5 along the axial direction of the sleeve 3 is arranged on the outer wall of the sleeve 3 , a slider 6 is arranged at one end of the connecting handle 2 connected to the sleeve 3 , and the slider 6 is slidably connected to the slide rail 5 .

[0029] Furthermore, the slide rail 5 is a slide groove arranged on the outer wall of the sleeve 3, the cross-section of the slide groove is trapezoidal, the large end of the slide groove is close to the sleeve 3, and the small end of the slide groove is an open end 8; the slider 6 includes an internal part and an external part, the internal part is clamped in the slide groove, the external part is located outside the slide groove, the internal part and the external part are fixedly connected, the external part is fixedly arranged on the connecting handle 2, the edge of the slide groove is clamped between the internal part and the external part, the internal part is trumpet-shaped, and the internal part can only slide along the length direction of the slide groove, and cannot slip out of the slide groove.

[0030] Furthermore, the locking device 7 includes a screw, which is inserted into the slider along an axial direction perpendicular to the sleeve 3. The screw is threadedly connected to the slider. Rotating the screw can make the end of the screw without a nut press against the inner wall of the sleeve 3, thereby fixing the sleeve 3 and the connecting handle 2.

[0031] Furthermore, a bone grafting window 4 is provided on the sleeve 3, which is provided at one end of the sleeve 3 away from the pressure plate 1. The bone grafting window 4 is located at 1 / 3 of the sleeve 3 near the end of the sleeve 3, and the axis of the sleeve 3 coincides with the central axis of the pressure plate 1.

[0032] The specific application process is as follows:

[0033] When performing anterior cruciate ligament revision surgery, after removing the remaining graft and fixing materials in advance, hold the connecting handle 2, insert the pressure plate 1 into the knee joint cavity, press the pressure plate 1 on the inner opening of the bone tunnel, slide the sleeve 3, place one end of the sleeve 3 at the outer opening of the bone tunnel, adjust the appropriate angle, and make the bone grafting window 4 face upwards. At this time, tighten the screws to fix the position of the connecting handle 2 and the sleeve 3, place the matching pressing rod at the starting end of the sleeve 3, and then place the bone grafting particles into the sleeve 3 through the bone grafting window 4. At this time, tap the pressing rod to gradually graft the bone tunnel.

[0034] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A bone implant aid, characterized in that: include: A pressure plate, a connecting handle and a sleeve, wherein the pressure plate and the sleeve are respectively connected to the two ends of the connecting handle and are arranged opposite to each other; the pressure plate is used to block the inner opening of the bone marrow canal, the two ends of the sleeve are open and one end of the sleeve is used to align with the outer opening of the bone marrow canal, and the other end of the sleeve is used to extend into a pressing rod; one end of the connecting handle is slidably connected to the sleeve along the axial direction of the sleeve, and the connecting handle and the sleeve can be locked and fixed by a locking device; the side of the pressure plate facing the bone marrow canal is an arc-shaped surface; the middle part of the connecting handle is arc-shaped, and the end of the connecting handle at one end connected to the pressure plate is a straight end, and the axis of the straight end coincides with the central axis of the pressure plate; a bone grafting window is provided on the sleeve, and the bone grafting window is provided at the end of the sleeve away from the pressure plate.

2. The bone grafting aid according to claim 1, characterized in that: The sleeve is a cylindrical sleeve, and a slide rail along the axial direction of the sleeve is arranged on the outer wall of the sleeve. A slider is arranged at one end of the connecting handle connected to the sleeve, and the slider is slidably connected to the slide rail.

3. The bone grafting aid according to claim 2, characterized in that: The slide rail is a slide groove arranged on the outer wall of the sleeve, the cross-section of the slide groove is trapezoidal, the large end of the slide groove is close to the sleeve, and the small end of the slide groove is an open end; the slider includes an inner part and an outer part, the inner part is clamped in the slide groove, the outer part is located outside the slide groove, the inner part and the outer part are fixedly connected, the outer part is fixedly arranged on the connecting handle, and the edge of the slide groove is clamped between the inner part and the outer part.

4. The bone grafting aid according to claim 3, characterized in that: The locking device includes a screw, which is inserted into the slider along an axial direction perpendicular to the sleeve, and the screw is threadedly connected to the slider. Rotating the screw can tighten the end of the screw without a nut against the inner wall of the sleeve.

Images