CN106821485B - a bone implant - Google Patents

Abstract

The invention discloses a bone grafting device used in bone implant surgery, which includes a delivery tube, the outer peripheral wall of the delivery tube near the end is provided with a filling port communicating with the inner cavity of the delivery tube, and the delivery tube is detachably connected by a connecting piece A pushing mechanism is provided. In the bone graft device provided by the present invention, the pushing mechanism and the conveying tube are detachably arranged. When flushing the bone graft cavity, the pushing mechanism is not installed on the conveying pipe first, and the conveying pipe and the filling port are used as Rinse utensils. When filling the bone graft cavity, install the pushing mechanism on the delivery tube, then add filler to the filling port on the delivery tube, and then push the filler into the bone graft cavity by the pushing mechanism to complete Filling of bone graft cavity. The bone grafting device has a simple structure, and realizes two purposes of one device, which makes the operation of bone grafting operation simple, thereby reducing the difficulty of bone grafting operation, reducing the number of devices used in bone grafting operation, and reducing the cost of bone grafting operation .

Description

a bone implant

technical field

The invention belongs to the field of medical appliances, in particular to an orthopedic appliance used when a bone graft filler needs to be implanted, in particular to a bone implant.

Background technique

In the field of orthopedics, bone grafting surgery is mainly to transplant bone tissue or biomaterials and other fillers to the patient's bone defect or bone reinforcement or guided fusion. tissue or biological material.

Most of the bone grafting devices in the prior art adopt the bone grafting device described in the utility model patent document whose application number is "201220176508.3", the application date is 2012.04.24, and the patent name is "a bone grafting device". The bone implement includes a hollow tubular bone graft body, a piston is arranged in the bone graft body, a piston rod is arranged on the piston to push the piston to move along the axis of the bone graft body, and a handle is arranged at the end of the bone graft body.

When the bone grafting device in the prior art is used, the prepared filler is placed in the bone grafting device, and then the piston is installed in the bone grafting device, and the front end of the bone grafting device is aligned with the bone graft to be grafted. Cavity, use the piston rod to push the piston to move, and the piston will push the filler into the bone graft cavity to complete the bone graft.

During the bone grafting operation, before the bone grafting to the bone grafting cavity, the bone grafting cavity needs to be flushed to wash out the residual diseased bone tissue out of the bone grafting cavity to ensure that the newly implanted filler will not be damaged by the diseased Bone tissue infection. In the prior art, the bone graft cavity is generally flushed with a special flushing device, and then the bone grafting device is used for bone grafting in the bone graft cavity.

In this way, the bone grafting cavity is first flushed with the flushing device, and then replaced with a bone grafting device to fill the bone grafting cavity. The replacement of the device in the bone grafting operation not only makes the bone grafting operation cumbersome, but also increases the difficulty of the bone grafting operation and the cost of bone graft surgery.

Contents of the invention

The main technical problem to be solved by the present invention is to provide a bone grafting device that can not only flush the bone graft cavity but also fill the bone graft cavity, so that the operation of bone graft operation is simple, the operation efficiency is improved, and at the same time, the bone graft operation can be reduced. Difficulty and cost of bone graft surgery.

In order to solve the above-mentioned technical problems, the technical solution adopted by the bone graft device of the present invention is: it includes a delivery tube for delivering bone graft fillers, and the outer peripheral wall of the delivery tube near the end is provided with a tube communicating with the inner cavity of the delivery tube. The filling port is used for adding bone graft filler, and the delivery pipe is detachably provided with a pushing mechanism for pushing the bone graft filler through a connecting piece.

Further preferably, the above-mentioned pushing mechanism includes a push rod arranged inside the above-mentioned conveying pipe and movably assembled with the conveying pipe. Rear side of filler port.

Further preferably, the connecting piece includes a rod lock that is slidably fitted on the push rod, and the rod lock is snap-fitted at the opening at the end of the delivery tube through a snap-fit structure.

Further preferably, the snap-fit structure includes an inserting hole axially arranged at the front end of the rod lock, and the inserting hole is coaxially fitted with the outer peripheral surface of the end of the delivery pipe. On the wall of the inserting hole, the An L-shaped locking groove is axially extended on the front end of the hole wall toward the rear, and a clamping post snap-fitted with the L-shaped locking groove is arranged on the outer peripheral wall of the delivery pipe.

Further preferably, the front end of the delivery tube is provided with a blocking mechanism that contracts inwards and expands outwards around the center of the front end of the delivery tube.

Further preferably, the above-mentioned conveying pipe is composed of an inner pipe and an outer pipe coaxially sealed and sleeved, the inner pipe and the outer pipe are rotatably assembled, the above-mentioned rod lock is assembled on the inner pipe, and the blocking mechanism includes a front end of the inner pipe There are baffles hingedly arranged uniformly along the circumferential direction on the surface, and the middle part of the baffles moves and is hinged on the front end surface of the outer tube.

Further preferably, the inner tube is a telescopic tube.

Further preferably, the filling port is in the shape of a trumpet with a large top and a small bottom.

Further preferably, the axis of the filling port intersects the axis of the delivery pipe, and the angle between the axis of the delivery pipe clockwise to the axis of the filling port is an acute angle.

The beneficial effect of the bone graft device of the present invention is: the bone graft device provided by the present invention, the pushing mechanism and the conveying tube of the bone graft device are detachable, and when the bone graft device is used to flush the bone graft cavity , the pushing mechanism is not installed on the delivery tube, directly use the delivery tube and the filling port on the delivery tube as a flushing device, extend the delivery tube into the bone graft cavity, and narrow or block the end opening of the delivery tube , and then inject flushing liquid into the filling port, and then open the end opening of the conveying pipe, so that the flushing liquid flows out along the conveying pipe from its end opening to complete the flushing. When the bone grafting device is used to fill the bone graft cavity, it is not necessary to take out the delivery tube for replacement, but directly install the above-mentioned pushing mechanism on the delivery tube, which is simple and convenient to install, and then fill the delivery tube with Filling is added to the mouth, and then the filling is pushed into the bone graft cavity by the pushing mechanism to complete the filling of the bone graft cavity. The structure of the bone grafting device is simple. During the two steps of flushing and filling the bone graft cavity, there is no need to replace the appliance. Instead, a pushing mechanism is directly installed on the conveying tube for flushing the bone graft cavity. A bone grafting device for bone grafting to the bone grafting cavity is formed, so that the bone grafting device of the present invention can not only flush the bone grafting cavity, but also fill the bone grafting cavity, and realize two purposes of one device, making the bone grafting Bone surgery is simple, reduces the difficulty of bone graft surgery, and can greatly improve the efficiency of surgery. The number of instruments used in the bone grafting operation is reduced, and the cost of the bone grafting operation is reduced.

At the same time, the bone graft device provided by the present invention can measure the volume of the bone graft cavity when flushing the bone graft cavity, so it can accurately grasp how much volume of filler needs to be added to the bone graft cavity, avoiding the occurrence of The bone graft cavity is not filled or filled too much, resulting in waste of filler.

Further, the pushing mechanism includes a combination of a piston and a pushing rod, and the piston and the pushing rod are located inside the delivery tube, which reduces the overall outer diameter of the bone grafter, and the pushing mechanism has a simple structure and is easy to operate.

Further, the pushing mechanism is assembled on the conveying pipe by means of a rod lock, which plays a role of supporting and guiding the pushing rod of the pushing mechanism, and the installation of the rod lock is simple and quick. The pushing mechanism and the conveying pipe form an integral structure, which ensures that the pushing rod moves smoothly and does not fall off during the pushing process of the pushing rod.

Further, the blocking mechanism is preferably provided. When the bone grafting device is used to flush the bone graft cavity, the blocking mechanism stops on the inner wall of the bone grafting cavity, and can firstly play a support limit for the bone grafting device. The role of the bone graft to prevent movement. At the same time, the gap between the delivery tube and the bone graft channel where the delivery tube is placed can be blocked to prevent the flushing liquid from flowing out along the gap during flushing.

Further, the inner tube is preferably configured as a telescopic tube, which can be suitable for flushing and filling bone graft cavities of different depths. The scope of application of the bone graft device of the present invention is wider.

Description of drawings

Fig. 1 is the front view of the embodiment of bone graft device of the present invention;

Fig. 2 is the exploded structure schematic diagram of the embodiment of the bone graft device of Fig. 1;

Fig. 3 is a drawing of the retracted state of the blocking mechanism in the embodiment of the bone graft device of Fig. 1;

Fig. 4 is the expansion state view of the blocking mechanism in the embodiment of the bone graft device of Fig. 1;

Fig. 5 is the use status figure that the embodiment of the bone graft device of Fig. 1 flushes the bone graft cavity;

Fig. 6 is the usage state figure that the embodiment of the bone graft device of Fig. 1 fills the bone graft cavity;

Fig. 7 is a schematic diagram of the structure of the inner tube in the embodiment of the bone grafter in Fig. 1 .

Detailed ways

In describing specific embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", " The orientation or positional relationship indicated by "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is for convenience only The present invention is described and simplified descriptions do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to two or more than two. The term "and/or" used in this specification includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be interpreted in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary; connected. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.

In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

As shown in Figures 1 to 6, the embodiment of the bone graft device of the present invention includes: a delivery tube 1, a filling port 3 communicating with the inner cavity of the delivery tube 1 is provided on the outer peripheral wall of the delivery tube 1 near the end, the delivery tube 1 1 is detachably provided with a pushing mechanism 5 through a connecting piece 4 .

As shown in Figure 5, the pushing mechanism 5 and the conveying tube 1 in the embodiment of the bone graft device of the present invention are detachably arranged, and when the bone graft cavity 22 on the bone 2 is washed, the pushing mechanism 5 Not installed on the delivery tube 1, directly use the delivery tube 1 and the filling port 3 on the delivery tube 1 as a flushing device, and first extend the delivery tube 1 from the bone graft channel 21 into the bone 2, so that the front end opening of the delivery tube 1 is located at At the inner edge of the bone graft cavity 22, then seal the end opening of the delivery tube 1, and then inject flushing fluid into the filling port 3, and the flushing fluid enters the bone graft cavity 22 along the delivery tube 1 for rinsing, and then opens the delivery tube 1 end opening, so that the flushing fluid flows out from the end opening along the delivery tube 1, and the above operations can be repeated to complete the flushing of the bone graft cavity 22.

As shown in Figure 6, when it is necessary to fill the bone graft cavity 22 with bone graft, it is not necessary to take out the delivery tube 1 to disassemble and replace it, but to directly install the pushing mechanism 5 on the delivery tube 1 through the connector 4, and then to Fill the filling port 3 with filler 23, use the pushing mechanism 5 to push the filler 23 filled into the delivery tube 1 into the bone graft cavity 22, repeat the above-mentioned operation process until the bone graft cavity 22 is filled until. The filling of the bone graft cavity 22 is completed.

Before the bone graft cavity 22 is filled, the size of the bone graft cavity 22 can be measured when the bone graft cavity 22 is flushed. The measurement method is: in the later stage of flushing or after the flushing is completed, inject the flushing liquid again, so that the flushing liquid fills the bone graft cavity 22 and the delivery tube 1, and measure the total volume of the filled flushing liquid, which can be measured by the method of measuring while injecting The volume of the flushing liquid injected can also be measured by releasing the flushing liquid after filling. Then, the volume of the bone graft cavity 22 is obtained by subtracting the volume of the inner cavity of the delivery tube 1 from the total volume of the measured irrigating fluid, so that it is possible to accurately grasp how much volume of filler 23 needs to be added to the bone graft cavity 22 , to avoid the situation that the bone graft cavity 22 is not filled or filled too much due to the inability to accurately measure the volume of the filler 23 to be filled. If it is not filled, it will cause insufficient bone grafting, prolong the treatment period, and risk of bone collapse. Too much filling will cause the pressure in the bone graft cavity to increase, which is not conducive to the combination of the filler 23 and the bone tissue in the cavity, and the growth of new bone tissue. Certainly also cause the situation that filler 23 is wasted.

In the embodiment of the bone grafting device of the present invention, during the two steps of flushing and filling the bone graft cavity, there is no need to replace the appliance, but a pushing mechanism is directly installed on the delivery tube for flushing the bone graft cavity, Just can form the bone grafting apparatus that carries out bone grafting to the bone grafting cavity, therefore realized that the bone grafting device of the present invention can not only flush the bone grafting cavity, but also fill the bone grafting cavity, and realize two purposes of one device, There is no need to add a flushing set for flushing the bone graft cavity 22 in the prior art, which saves the time for replacement and improves the efficiency of the operation. At the same time, the number of instruments used in the bone grafting operation is reduced, and the cost of the bone grafting operation is reduced. Moreover, the embodiment of the bone grafting device of the present invention can accurately measure the volume of the bone grafting cavity 22, improving the accuracy of bone grafting.

Further preferably, the filling port 3 is in the shape of a trumpet with a large top and a small bottom. The axis of the filling port 3 intersects the axis of the delivery pipe 1 , and the angle α between the axis of the delivery pipe clockwise to the axis of the filling port is an acute angle. Such arrangement can make the flushing fluid or bone graft filler filled into the filling port 3 move along the delivery tube 1 to the front end of the delivery tube 1 more easily.

Further preferably, as shown in FIG. 2 , the pushing mechanism 5 includes a push rod 6 which is arranged inside the delivery pipe 1 and moves along the axis of the delivery pipe 1 . Piston 7 with the same inner diameter, and the limit point of piston 7 at the end of delivery pipe 1 is located on the rear side of filling port 3, so that when stuffing material 23 is filled into filling port 3, piston 7 can push filling material 23 along the direction of delivery tube 1 move forward. The end of the push rod 6 is fixedly provided with a push handle 9 . The pusher mechanism 5 adopts the assembly structure of the push rod 6 and the piston 7, so that the pusher mechanism 5 can be operated at the end of the conveying pipe 1, so that the operation is simple and convenient.

Further preferably, the connecting member 4 includes a rod lock 8 that is slidably fitted on the push rod 6 , and the rod lock 8 is snap-fitted at the opening at the end of the delivery pipe 1 through a snap-fit structure.

Further preferably, the clamping structure includes that the front end of the rod lock 8 is axially provided with a sleeve hole 10, and the sleeve hole 10 is coaxially fitted with the outer peripheral surface of the end of the delivery pipe 1, and the hole wall of the sleeve hole 10 is formed by the hole wall. An axially extending L-shaped locking groove 11 is arranged on the front end face of the pipe 1 backward, and a clamping column 12 snap-fitted with the L-shaped locking groove 11 is arranged on the outer peripheral wall of the delivery pipe 1 . When installing the pushing mechanism 5 on the conveying pipe 1, the piston 7 and the push rod 6 are first inserted into the conveying pipe 1, and then the rod lock 8 is set on the outer peripheral surface of the conveying pipe 1 through the inserting hole 10. During the process, the clamping column 12 is first inserted into the axial groove part of the L-shaped locking groove 11, and then the lever lock 8 is rotated so that the clamping column 12 enters the circumferential groove part of the L-shaped locking groove 11 , the push rod 6 and the delivery pipe 1 can be axially limited and locked by the rod lock 8 . The rod lock 8 is coaxially sleeved on the delivery tube 1, and plays a supporting and guiding role in the axial pushing process of the push rod 6, so that the push rod 6 can accurately and stably push the filler 23 into the bone graft cavity 22. The rod lock 8 makes the pusher mechanism 5 and the conveying pipe 1 an integral structure, which ensures that the pusher mechanism 5 moves smoothly and does not fall off during use.

As shown in FIG. 2 , further preferably, the front end of the delivery tube 1 is provided with a blocking mechanism 13 that can shrink inward and expand outward around the center of the front end surface of the delivery tube 1 . When the delivery tube 1 and the filling port 3 are used as flushing tools to flush the bone graft cavity 22, since there is a gap between the outer peripheral surface of the delivery tube 1 and the inner wall of the bone graft channel 21, the flushing fluid may be flushed during the flushing process. It will flow out from the gap and need to be wiped manually, causing some troubles to the bone grafting operation, and the bone tissue may also flow into the patient's wound with the flushing fluid, which will have a certain impact on the later recovery of the patient. The blocking mechanism 13 of this embodiment expands outward when the delivery tube 1 is inserted into the edge of the bone graft cavity 22, so that the blocking mechanism 13 stops on the inner wall of the bone graft cavity 22. First, the blocking mechanism 13 can The delivery tube 1 plays a role of supporting and limiting, preventing the delivery tube 1 from moving and falling off along the bone graft channel 21. Secondly, when the sealing mechanism 13 expands outward, it can also seal the gap between the delivery tube 1 and the bone graft channel 21. Blocking prevents flushing liquid and bone tissue from flowing out along the gap when the bone graft cavity 22 is flushed.

As shown in Figures 2 to 4, further preferably, the delivery pipe 1 is composed of an inner pipe 14 and an outer pipe 15 coaxially sealed and sleeved, the inner pipe 14 and the outer pipe 15 rotate relatively, and the rod lock 8 is assembled on the inner pipe 14 Above, the above-mentioned blocking mechanism includes blocking pieces 16 uniformly distributed and hinged along the circumferential direction on the front end surface of the inner tube 14 , and the middle part of the blocking piece 16 is hinged on the front end surface of the outer tube 15 . When the delivery tube 1 starts to be inserted into the bone graft channel 21, as shown in Figure 3, the blocking piece 16 is in the position of contracting inwardly, and the outer diameter surrounded by the blocking piece 16 is smaller than the outer diameter of the outer tube 15, when the delivery tube When the front port of 1 extends into the edge inner side of the bone graft cavity 22, the inner tube 14 is rotated to expand the blocking plate 16 outward, and stop on the inner wall of the bone graft cavity 22.

As shown in FIG. 7, further preferably, the inner tube 14 is a telescopic tube, and the telescopic function of the telescopic tube can be realized by the following structure. The inner tube 14 includes a coaxially sleeved first inner tube 141 and a second inner tube 142, The connection between the first inner tube 141 and the second inner tube 142 is provided with a clamping structure. When the length of the inner tube 14 needs to be adjusted, only the first inner tube 141 needs to be extended or retracted relative to the second inner tube 142. Then, the connection between the first inner tube 141 and the second inner tube 142 can be clamped by using a clamping structure. The inner tube 14 with telescoping function is suitable for filling bone graft cavities of different depths. The embodiment of the bone graft device of the present invention has a wider scope of application.

The above-mentioned clamping structure includes a connecting sleeve 143 fixedly sleeved on the second inner tube 142 and a movable sleeve 144 movably sleeved on the first inner tube 141. The connecting sleeve 143 is fixedly provided with The elastic claw 145 on the outer peripheral surface, the movable sleeve 144 is provided with a tapered cavity for accommodating the elastic claw 145, the connecting sleeve 143 is provided with an external thread, and the inner wall of the movable sleeve 144 is provided with an internal thread matched with the external thread. For example, when the length of the inner tube 14 is lengthened, the first inner tube 141 is stretched. After the length is determined, the movable sleeve 144 is screwed into the connecting sleeve 143. Under the action of the cavity, it shrinks gradually until it is tightly clamped on the outer peripheral surface of the first inner tube 141 , that is, the first inner tube 141 and the second inner tube 142 are locked.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields, all include Within the scope of patent protection of the present invention.

Claims (5)

1. A bone implant, comprising a delivery tube for transporting bone graft fillers, characterized in that, the delivery tube near the end of the peripheral wall is provided with a cavity communicating with the delivery tube for adding the The filling port of the bone graft filling, the delivery tube is detachably provided with a pushing mechanism for pushing the bone graft filling through a connecting piece, the pushing mechanism includes a The push rod of the moving assembly of the conveying pipe, the front end of the push rod is fixed with a piston, the limit point of the piston at the end of the conveying pipe is located at the rear side of the filling port, and the connecting part includes a sliding assembly The rod lock on the push rod, and the rod lock is clamped and assembled at the opening at the end of the delivery pipe through a snap-fit structure, and the front end of the delivery pipe is provided with a A blocking mechanism that shrinks inward and expands outwards, the delivery tube is composed of an inner tube and an outer tube that are coaxially sealed and sleeved, the inner tube and the outer tube are rotatably assembled, and the rod lock is assembled in the inner tube On the tube, the blocking mechanism includes baffles uniformly distributed and hinged along the circumferential direction on the front end of the inner tube, and the middle part of the baffle moves and is hinged on the front end of the outer tube. 2. The bone graft device according to claim 1, characterized in that, the engaging structure comprises an inserting hole axially arranged at the front end of the rod lock, and the inserting hole is connected to the outer peripheral surface of the end of the delivery tube. The coaxial sleeve fits, and on the hole wall of the sleeve hole, an L-shaped locking groove is arranged axially from the front end of the hole wall to the rear, and the outer peripheral wall of the delivery pipe is provided with the L-shaped locking groove. The locking groove of the type is snap-fitted with the card post. 3. The bone graft device according to claim 2, wherein the inner tube is a telescopic tube. 4. The bone graft device according to claim 3, characterized in that, the filling port is in the shape of a trumpet with a large top and a small bottom. 5. The bone graft device according to claim 4, characterized in that, the axis of the filling port intersects the axis of the delivery tube, and the axis of the delivery tube goes clockwise to the axis of the filling port. The angle between them is acute.

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