Bone grafting support for bone defect membrane induction

Abstract

The utility model discloses a bone grafting support for bone defect membrane induction, which comprises a truss body, one end of the truss body is provided with an upper connecting piece, and the other end of the truss body is connected with a lower connecting piece; an upper connecting bone-shaped channel is machined in the upper connecting piece, and a lower connecting bone-shaped channel is machined in the lower connecting piece. Before the bone defect membrane is induced to be implanted into the stent, the upper connecting bone-shaped channel on the upper connecting piece is designed to be in the shape of a lower bone section between osteogenesis defects, and the lower connecting bone-shaped channel on the lower connecting piece is designed to be in the shape of an upper bone section between osteogenesis defects, so that the implanted stent is more matched with bones, and subsequent repair treatment work is facilitated; and after the connection of the implanted stent is completed, the two ends of the screw are embedded into the mounting hole and the hexagonal nut, no protruding hardware structure exists, and the later repair treatment work is facilitated.

Description

TECHNICAL FIELD

[0001] The patent relates to the technical field of bone defect membrane-induced bone grafting scaffolds, in particular to a bone defect membrane-induced bone grafting scaffold. BACKGROUND

[0002] Various diseases such as fractures, bone infections, bone tumors, etc. can cause bone defects. For large bone defects, especially infected bone defects, membrane induction is one of the important means for treating long bone defects, characterized by staged treatment of bone defects. Membrane induction is to fill PMMA spacer (bone cement) in the bone defect area, and the local foreign body rejection reaction will induce the formation of a local pseudo-bone membrane layer within 4-6 weeks. Then remove the spacer and implant autologous bone to repair the bone defect without damaging the pseudo-bone membrane layer, which can make the bone defect heal quickly. During the second operation, in addition to bone grafting, temporary internal fixation is also needed to maintain limb function and length, and wait for the fracture to heal. However, the current bone defect membrane-induced bone grafting scaffold uses a side plate to fix on the bone, and the side plate has a certain thickness, which brings inconvenience to the subsequent repair process. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the patent is to provide a bone defect membrane-induced bone grafting scaffold, which solves the problem of the current bone defect membrane-induced bone grafting scaffold, which uses a side plate to fix on the bone, and the side plate has a certain thickness, which brings inconvenience to the subsequent repair process.

[0004] To achieve the above purpose, the patent provides the following technical scheme: a bone defect membrane-induced bone grafting scaffold, comprising a truss body, one end of the truss body is provided with an upper connecting piece, the other end of the truss body is connected with a lower connecting piece;

[0005] An upper bone-shaped channel is processed on the upper connecting piece, and a lower bone-shaped channel is processed on the lower connecting piece.

[0006] Preferably, a first connecting plate is installed on one side of the upper connecting piece, a left bone-shaped groove is opened on the first connecting plate, and a round hole is opened on the left bone-shaped groove.

[0007] A second connecting plate is installed on the other side of the upper connecting piece, a right bone-shaped groove is opened on the second connecting plate, and a mounting hole is opened on the right bone-shaped groove.

[0008] Preferably, a screw is inserted into the mounting hole, and the screw is used to connect the first connecting plate and the second connecting plate.

[0009] Preferably, the cross section of the mounting hole is in the shape of T.

[0010] Preferably, a hexagonal groove is provided on the circular hole, and a hexagonal nut is installed in the hexagonal groove.

[0011] Preferably, the truss body is provided with connecting rods, and the connecting rods are provided with through holes on the upper and lower sides respectively.

[0012] Preferably, the truss body is made of titanium alloy.

[0013] Compared with existing technologies, the beneficial effects of this patent are as follows: This bone graft scaffold for inducing bone defect membranes has the following advantages compared with traditional technologies:

[0014] Before inducing the implantation of the scaffold in the bone defect membrane, the upper connecting bone-shaped channel on the upper connector is designed to be the shape of the lower bone segment between the bone defects, and the lower connecting bone-shaped channel on the lower connector is designed to be the shape of the upper bone segment between the bone defects, so that the implanted scaffold fits the bone better and facilitates subsequent repair work.

[0015] After the implanted stent is connected, both ends of the screw are embedded in the mounting hole and the hexagonal nut, with no protruding hardware structure, which facilitates subsequent repair work. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this patent;

[0017] Figure 2 This is a structural schematic diagram of the truss body, the upper connector, and the lower connector of this patent.

[0018] Figure 3 This is a schematic diagram of the truss body of this patent;

[0019] Figure 4 This is a schematic diagram of the structure of the first connecting plate, the left bone-shaped groove, and the round hole in this patent.

[0020] Figure 5 This is a schematic diagram of the structure of the second connecting plate, the right-side bone-shaped groove, and the mounting hole in this patent.

[0021] Figure 6 This is a schematic diagram of the connecting rod and through hole structure of this patent.

[0022] In the diagram: 1. Truss body; 2. Upper connector; 3. Lower connector; 4. Upper connecting bone channel; 5. Lower connecting bone channel; 6. First connecting plate; 7. Left bone groove; 8. Round hole; 9. Second connecting plate; 10. Right bone groove; 11. Mounting hole; 12. Screw; 13. Hexagonal slot; 14. Hexagonal nut; 15. Connecting rod; 16. Through hole. Detailed Implementation

[0023] The technical solutions of this patent embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this patent, and not all of them. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0024] Please see Figures 1-6 This patent provides a technical solution: a bone graft scaffold for inducing bone defect membrane, including a truss body 1, which is composed of multiple units arranged sequentially from bottom to top. Each unit has multiple hollow holes, and the hollow holes of each unit form multiple filling cavities inside the truss body 1 that connect the upper and lower or inner and outer walls (for specific structural construction, please refer to patent number: CN202122694434.4). The length of the truss body 1 is set according to actual use needs. One end of the truss body 1 is equipped with an upper connector 2, and the other end of the truss body 1 is connected to a lower connector 3. The upper connector 2 and the lower connector 3 are made of the same material as the truss body 1.

[0025] The upper connector 2 is machined with an upper connecting bone-shaped channel 4. The upper connecting bone-shaped channel 4 on the upper connector 2 is designed according to the shape of the lower bone segment between the bone defects. The lower connector 3 is machined with a lower connecting bone-shaped channel 5. The lower connecting bone-shaped channel 5 on the lower connector 3 is designed according to the shape of the upper bone segment between the bone defects.

[0026] Before inducing the implantation of the scaffold in the bone defect membrane, the upper connecting bone-shaped channel 4 on the upper connector 2 is designed to be the shape of the lower bone segment between the bone defects, and the lower connecting bone-shaped channel 5 on the lower connector 3 is designed to be the shape of the upper bone segment between the bone defects, so that the implanted scaffold fits the bone better and facilitates subsequent repair work.

[0027] A first connecting plate 6 is installed on one side of the upper connector 2. A left bone-shaped groove 7 is provided on the first connecting plate 6. A round hole 8 is provided on the left bone-shaped groove 7. The left bone-shaped groove 7 on the first connecting plate 6 is designed to be the left side shape of the lower bone.

[0028] A second connecting plate 9 is installed on the other side of the upper connector 2. The second connecting plate 9 has a right bone-shaped groove 10 and a mounting hole 11. The right bone-shaped groove 10 on the second connecting plate 9 is designed to be the right side shape of the lower bone.

[0029] A screw 12 is inserted into the mounting hole 11. The screw 12 is used to connect the first connecting plate 6 and the second connecting plate 9.

[0030] The cross-section of mounting hole 11 is T-shaped.

[0031] A hexagonal groove 13 is provided on the round hole 8, and a hexagonal nut 14 is installed in the hexagonal groove 13;

[0032] The first and second connecting plates are also installed on the lower connector 3, and the left and right grooves are designed according to the shape of the upper bone, and are also designed with round holes 8, mounting holes 11, hexagonal grooves 13 and hexagonal nuts 14.

[0033] A connecting rod 15 is provided on the outside of the truss body 1. The diameter of the connecting rod 15 is smaller than the inner diameter of the central hollow hole of the truss body 1. The length is selected according to the actual use needs. Through holes 16 are opened on the upper and lower sides of the connecting rod 15 respectively. The through holes 16 have the same size as the round hole 8.

[0034] Truss body 1 is made of titanium alloy.

[0035] When using the bone graft scaffold for inducing bone defect membranes, before implanting the scaffold for inducing bone defect membranes, the upper connecting bone-shaped channel 4 on the upper connector 2 is designed to resemble the lower bone segment between the bone defects, the lower connecting bone-shaped channel 5 on the lower connector 3 is designed to resemble the upper bone segment between the bone defects, the left bone-shaped groove 7 on the first connecting plate 6 is designed to resemble the left side of the lower bone, and the right bone-shaped groove 10 on the second connecting plate 9 is designed to resemble the right side of the lower bone. Similarly, the grooves on the first and second connecting plates at the other end are designed according to the shape of the upper bone. Holes are made in the upper and lower bone segments, with the size of the holes being the dimensions of the connecting rod 15. Horizontal holes of the size of round holes 8 are made on both sides of the holes. In use, the connecting rod 15 is inserted into the truss body 1, with one end extending from the upper connector 2. The upper end of the screw 12 passes through the upper connecting bone-shaped channel 4, through the space between the connecting plates on both sides, and the other end passes through the lower connecting bone-shaped channel 5 on the lower connecting member 3, through the space between the connecting plates on both sides, and is inserted into the pre-designed holes in the upper and lower bone segments. The upper bone segment passes through the grooves in the left and right connecting plates and through the lower connecting bone-shaped channel 5 on the lower connecting member 3, while the lower bone segment passes through the grooves in the left and right connecting plates and through the upper connecting bone-shaped channel 4 on the upper connecting member 2. This allows the screw 12 to pass through the mounting hole 11, the hole on the bone segment, and the through hole 16, respectively. It then passes through the round hole 8 and is screwed into the hexagonal nut 14 on the hexagonal groove 13, completing the connection of the implanted bracket. Both ends of the screw 12 are embedded in the mounting hole 11 and the hexagonal nut 14, with no protruding hardware structure, which facilitates subsequent repair work.

[0036] Although embodiments of this patent have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this patent, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bone graft scaffold for inducing bone defect membrane, comprising a truss body (1), characterized in that: One end of the truss body (1) is equipped with an upper connector (2), and the other end of the truss body (1) is connected to a lower connector (3); The upper connector (2) is machined with an upper connecting bone-shaped channel (4), and the lower connector (3) is machined with a lower connecting bone-shaped channel (5).

2. The bone graft scaffold for inducing bone defect membrane according to claim 1, characterized in that: A first connecting plate (6) is installed on one side of the upper connector (2), and a left bone-shaped groove (7) is provided on the first connecting plate (6), and a round hole (8) is provided on the left bone-shaped groove (7); A second connecting plate (9) is installed on the other side of the upper connector (2). The second connecting plate (9) has a right-side bone-shaped groove (10) and a mounting hole (11) is provided on the right-side bone-shaped groove (10).

3. The bone graft scaffold for inducing bone defect membrane according to claim 2, characterized in that: A screw (12) is inserted into the mounting hole (11), and the screw (12) is used to connect the first connecting plate (6) and the second connecting plate (9).

4. A bone graft scaffold for inducing bone defect membrane according to claim 2, characterized in that: The mounting hole (11) has a T-shaped cross section.

5. A bone graft scaffold for inducing bone defect membrane according to claim 2, characterized in that: A hexagonal groove (13) is provided on the circular hole (8), and a hexagonal nut (14) is installed in the hexagonal groove (13).

6. A bone graft scaffold for inducing bone defect membrane according to claim 1, characterized in that: A connecting rod (15) is provided on the outside of the truss body (1), and through holes (16) are respectively opened on the upper and lower sides of the connecting rod (15).

7. A bone graft scaffold for inducing bone defect membrane according to claim 1, characterized in that: The truss body (1) is made of titanium alloy.

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