A bone extractor

Abstract

The present technical scheme discloses a bone extractor, comprising a positioning outer cylinder, a bone extracting inner cylinder, a first handle and a second handle; a positioning pin is provided at the front end portion of the positioning outer cylinder, and an internal thread is provided on the inner wall of the positioning outer cylinder; a cutting tooth is provided at the front end portion of the bone extracting inner cylinder, and a closing platform is provided at the rear end portion of the bone extracting inner cylinder; an external thread is provided on the outer wall of the bone extracting inner cylinder, which is mutually matched with the internal thread provided on the inner wall of the positioning outer cylinder, and a first connecting groove is provided on the closing platform; a first connecting key is provided on the first handle, and the first connecting key matches the first connecting groove; the second handle comprises a connecting crank, a rotating handle and a second connecting key, the connecting crank connects the second connecting key with the rotating handle to form a Z-shaped structure, and the second connecting key matches the first connecting groove; the bone extractor can improve the accuracy of bone extraction and realize the controllable bone extraction specifications.

Description

Technical Field

[0001] The technical solution belongs to the technical field of medical devices, and specifically is a surgical instrument for orthopedic transplantation. Background Art

[0002] In orthopedic clinical work, autologous or allogeneic bone harvesting and bone transplantation are relatively common transplantation techniques. Currently, osteotome or ring-shaped bone harvesting is mostly used in clinical practice. However, it is difficult to control the size of the harvested bone when using osteotome or ring-shaped bone harvesting, and the contact surface after bone transplantation is only limited, which may cause the growth and fusion failure.

[0003] When using traditional bone extraction instruments to extract cancellous bone, it is difficult to separate the cancellous bone from the main bone, which affects the bone extraction effect and forces bone extraction to be performed again, which causes great trouble to patients and doctors.

[0004] During the bone removal process, since there are many venous sinuses in the medullary cavity, using traditional bone removal tools will cause more bleeding. If the bleeding is not stopped thoroughly at this time, drainage is likely to be blocked, causing local hematoma and massive bleeding, causing the patient's blood pressure to drop or even shock. Summary of the invention

[0005] The technical solution provides a bone extractor, which can improve the accuracy of bone extraction and achieve controllable bone extraction specifications.

[0006] To achieve the above purpose, the technical solution is as follows.

[0007] A bone remover comprises a positioning outer cylinder, a bone removing inner cylinder, a first handle and a second handle; a positioning pin is provided at the front end of the positioning outer cylinder, and an internal thread is provided on the inner wall of the positioning outer cylinder; a cutting tooth is provided at the front end of the bone removing inner cylinder, and a closing platform is provided at the rear end of the bone removing inner cylinder; an external thread is provided on the outer wall of the bone removing inner cylinder, which is mutually matched with the internal thread provided on the inner wall of the positioning outer cylinder, and a first connecting groove is provided on the closing platform; a first connecting key is provided on the first handle, and the first connecting key matches the first connecting groove; the second handle comprises a connecting crank, a rotating handle and a second connecting key, the connecting crank connects the second connecting key with the rotating handle to form a Z-shaped structure, and the second connecting key matches the first connecting groove.

[0008] Furthermore, a slicing groove is provided along the height direction of the tube wall of the bone-removing inner tube, and the slicing groove connects the outer wall and the inner wall of the bone-removing inner tube.

[0009] Furthermore, the slicing grooves are provided in plurality, the heights of the plurality of slicing grooves are different, and the plurality of slicing grooves are arranged and distributed in sequence according to their heights.

[0010] Furthermore, there are a plurality of positioning pins, which are evenly distributed around the circumference.

[0011] Furthermore, the positioning pin is a tetrahedral structure, and the side surface of the positioning pin along the tangent direction of the outer circumference of the positioning outer cylinder is a trapezoidal structure.

[0012] Furthermore, a plurality of cutting teeth are provided, and the cutting teeth are evenly distributed along the circumference.

[0013] Furthermore, the cutting tooth is a pentahedral structure, and a cutting edge is provided on the edge of the pentahedral structure of the cutting tooth.

[0014] Furthermore, a flow-conducting hole is provided on the wall of the bone-removing inner tube, and the flow-conducting hole is arranged along the height direction of the bone-removing inner tube.

[0015] Furthermore, an observation through groove is provided on the wall of the bone removal inner tube.

[0016] A bone extractor also includes a bone grafting drill, which is a cylindrical structure. A bone expansion head is provided at one end of the bone grafting drill, and a connecting thread is provided at the other end of the bone grafting drill. The connecting thread matches the internal thread set in the bone extraction inner tube. The diameter of the expanded head is the same as the inner diameter of the bone extraction inner tube. A second connecting groove is provided on the end face of the end provided with the connecting thread, and the second connecting groove is matched and connected with the first connecting key and the second connecting key respectively.

[0017] The beneficial effects of the present technical solution are as follows: the present technical solution is provided with a positioning outer cylinder and a bone removal inner cylinder, the positioning outer cylinder is connected to the bone removal inner cylinder by a threaded connection, and the bone remover is provided with two handles, so the handles can be selected according to different situations, which greatly facilitates the doctor's operation and ensures the accuracy of bone removal; the positioning outer cylinder is provided with a positioning needle, and the positioning needle can enter the bone for fixation, which can effectively help the doctor to achieve rapid and stable positioning of bone removal; the bone remover described in the present technical solution can avoid the disadvantages of manual positioning and manual bone removal of traditional bone removers, and overcome the disadvantages of uneven force caused by manual operation, thereby causing deviation in the bone removal direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the positioning outer cylinder described in Example 1.

[0019] Figure 2 This is a schematic diagram of the structure of the bone removal inner tube described in Example 1.

[0020] Figure 3 This is a schematic structural diagram of the closing platform of the bone removal inner tube described in Example 1.

[0021] Figure 4This is a schematic diagram of the structure of the first handle described in Example 1.

[0022] Figure 5 This is a schematic diagram of the structure of the second handle described in Example 1.

[0023] Figure 6 Schematic diagram of the structure of the bone grafting drill described in Example 1. DETAILED DESCRIPTION

[0024] Example 1

[0025] Reference Figure 1 to Figure 6 A bone remover comprises a positioning outer cylinder 1, a bone removing inner cylinder 2, a first handle 3 and a second handle 4; a positioning pin 11 is provided at the front end of the positioning outer cylinder 1, and an internal thread is provided on the inner wall of the positioning outer cylinder 1; a cutting tooth 21 is provided at the front end of the bone removing inner cylinder 2, a closing platform 22 is provided at the rear end of the bone removing inner cylinder 2, an external thread is provided on the outer wall of the bone removing inner cylinder 2, which is matched with the internal thread provided on the inner wall of the positioning outer cylinder 1, and a first connecting groove 23 is provided on the closing platform 22; a first connecting key 31 is provided on the first handle 3, and the first connecting key 31 matches the first connecting groove 23; the second handle 4 comprises a connecting crank 41, a rotating handle 42 and a second connecting key 43, the connecting crank 41 connects the second connecting key 43 with the rotating handle 42 to form a Z-shaped structure, and the second connecting key 43 matches the first connecting groove 23.

[0026] Furthermore, a slicing groove 24 is provided along the height direction of the wall of the bone-removing inner tube 2 , and the slicing groove 24 connects the outer wall and the inner wall of the bone-removing inner tube 2 .

[0027] Furthermore, a plurality of slicing grooves 24 are provided, and the heights of the plurality of slicing grooves 24 are different, and the plurality of slicing grooves 24 are arranged and distributed in sequence according to their heights.

[0028] Furthermore, there are a plurality of positioning pins 11 , which are evenly distributed around the circumference.

[0029] Furthermore, the positioning pin 11 is a tetrahedral structure, and the side surface of the positioning pin 11 along the tangent direction of the outer circumference of the positioning outer cylinder 1 is a trapezoidal structure.

[0030] Furthermore, a plurality of cutting teeth 21 are provided, and the cutting teeth 21 are evenly distributed along the circumference.

[0031] Furthermore, the cutting tooth 21 is a pentahedral structure, and a cutting edge is provided on the edge of the pentahedral structure of the cutting tooth 21 .

[0032] Furthermore, a flow-conducting hole 25 is further provided on the wall of the bone-removing inner tube 2 , and the flow-conducting hole 25 is arranged along the height direction of the bone-removing inner tube 2 .

[0033] Furthermore, an observation through groove 26 is provided on the wall of the bone removal inner tube 2 .

[0034] A bone extractor also includes a bone grafting drill 5, which is a cylindrical structure. One end of the bone grafting drill 5 is provided with a bone expansion head 51, and the other end of the bone grafting drill 5 is provided with a connecting thread 52. The connecting thread 52 matches the internal thread set in the bone extraction inner tube 2. The diameter of the expanded head 51 is the same as the inner diameter of the bone extraction inner tube 2. A second connecting groove 53 is provided on the end face of the end provided with the connecting thread 52. The second connecting groove 53 is matched and connected with the first connecting key 31 and the second connecting key 43 respectively.

Claims

1. A bone extractor, characterized in that: It includes a positioning outer cylinder, a bone-removing inner cylinder, a first handle and a second handle; a positioning pin is provided at the front end portion of the positioning outer cylinder, and an internal thread is provided on the inner wall of the positioning outer cylinder; a cutting tooth is provided at the front end portion of the bone-removing inner cylinder, and a closing platform is provided at the rear end portion of the bone-removing inner cylinder; an external thread is provided on the outer wall of the bone-removing inner cylinder, which is mutually compatible with the internal thread arranged on the inner wall of the positioning outer cylinder, and a first connecting groove is provided on the closing platform; a first connecting key is provided on the first handle, and the first connecting key matches the first connecting groove; the second handle includes a connecting crank, a rotating handle and a second connecting key, the connecting crank connects the second connecting key with the rotating handle to form a Z-shaped structure, the second connecting key is mutually compatible with the first connecting groove, a slicing groove is provided along the height direction of the cylinder wall of the bone-removing inner cylinder, and the slicing groove connects the outer wall and the inner wall of the bone-removing inner cylinder, and a plurality of positioning pins are provided, and they are evenly distributed around the circumference.

2. A bone extractor according to claim 1, characterized in that: There are a plurality of slicing grooves, the heights of the plurality of slicing grooves are different, and the plurality of slicing grooves are arranged and distributed in sequence according to the heights.

3. A bone extractor according to claim 1, characterized in that: The positioning pin is a tetrahedral structure, and the side surface of the positioning pin along the tangent direction of the outer circumference of the positioning outer cylinder is a trapezoidal structure.

4. A bone extractor according to claim 1, characterized in that: A plurality of cutting teeth are provided, and the cutting teeth are evenly distributed along the circumference.

5. The bone extractor according to claim 1, characterized in that: The cutting teeth are pentahedral structures, and edges of the pentahedral structures of the cutting teeth are provided with cutting edges.

6. A bone extractor according to claim 1, characterized in that: The tube wall of the bone-removing inner tube is also provided with a flow-conducting hole, and the flow-conducting hole is arranged along the height direction of the bone-removing inner tube.

7. The bone extractor according to claim 1, characterized in that: An observation through groove is arranged on the wall of the bone-taking inner tube.

8. The bone extractor according to claim 1, characterized in that: It also includes a bone grafting drill, which is a cylindrical structure. A bone expansion head is provided at one end of the bone grafting drill, and a connecting thread is provided at the other end of the bone grafting drill. The connecting thread matches the internal thread set in the bone removal inner tube. The diameter of the expanded bone head is the same as the inner diameter of the bone removal inner tube. A second connecting groove is provided on the end face of the end provided with the connecting thread, and the second connecting groove is matched and connected with the first connecting key and the second connecting key respectively.

Images