CN210871973U - Centrum bone grafting device - Google Patents
Centrum bone grafting device Download PDFInfo
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- CN210871973U CN210871973U CN201921544366.XU CN201921544366U CN210871973U CN 210871973 U CN210871973 U CN 210871973U CN 201921544366 U CN201921544366 U CN 201921544366U CN 210871973 U CN210871973 U CN 210871973U
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 274
- 230000007246 mechanism Effects 0.000 claims abstract description 81
- 239000007943 implant Substances 0.000 claims description 20
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000005491 wire drawing Methods 0.000 abstract 1
- 208000010392 Bone Fractures Diseases 0.000 description 7
- 206010017076 Fracture Diseases 0.000 description 7
- 238000003466 welding Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 206010041569 spinal fracture Diseases 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001009 osteoporotic effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 208000024891 symptom Diseases 0.000 description 2
- 206010029174 Nerve compression Diseases 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000000735 allogeneic effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The utility model discloses a centrum bone grafting device, which comprises a bone grafting tube mechanism, a push rod, a core bar, a bone grafting chain mechanism, a wire drawing mechanism and a sleeve mechanism; the bone grafting tube mechanism comprises a bone grafting tube main body and a bone grafting tube, wherein a bone grafting opening is formed in the side wall of the closed end of the bone grafting tube main body, and a bone grafting tube opening is formed in the side wall of the open end of the bone grafting tube main body; a core bar channel is arranged in the push rod; the core bar is positioned in the core bar channel; the bone grafting chain mechanism comprises a middle connecting component, a first end piece, a first flexible connecting piece, a second flexible connecting piece and a second end piece; the pull wire mechanism comprises a pull wire control button and a pull wire, one end of the pull wire is fixed on the pull wire control button, and the other end of the pull wire sequentially penetrates through the pull wire through hole of the end part, the pull wire through hole of the flexible connecting piece and the pull wire through hole of the joint part and is fixed on the pull wire fixing hole; the sleeve mechanism comprises a sleeve, and a bone grafting pipe channel is arranged in the sleeve. The vertebral body bone grafting device is simple to operate, the bone grafting space can be flexibly and accurately cleared through the bone grafting chain mechanism, and the bone grafting precision is high.
Description
Technical Field
The utility model relates to a centrum field of restoreing, more specifically relates to a centrum bone grafting ware.
Background
Vertebral fractures can be generally classified into osteoporotic vertebral fractures and normal vertebral fractures due to violence, depending on the age of the patient. For vertebral body fracture without nerve compression symptoms, the osteoporotic vertebral body fracture is mostly treated by bed rest and vertebral body adult plasty, and if the compression degree of the normal vertebral body fracture is more than 1/3, the normal vertebral body fracture can be treated by performing incision reduction, fixing in a pedicle screw rod system and implanting bone grafting materials in the vertebral body through a pedicle channel.
The implantation of bone graft materials into a vertebral body requires the use of a vertebral body bone graft. The existing vertebral body bone grafting device is complex to operate and cannot well treat vertebral body fracture with complex symptoms.
Therefore, how to provide a vertebral body bone grafting device with simple operation and high bone grafting precision becomes a technical problem to be solved urgently in the field.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a new technical scheme of the centrum bone grafting device with simple operation and high bone grafting precision.
According to a first aspect of the present invention, a vertebral body bone grafting device is provided.
The centrum bone grafting device comprises a bone grafting tube mechanism, a push rod, a core bar, a bone grafting chain mechanism, a wire pulling mechanism and a sleeve mechanism; wherein,
the bone grafting tube mechanism comprises a bone grafting tube main body and a bone grafting tube, one end of the bone grafting tube main body is closed, the other end of the bone grafting tube main body is open, a bone grafting opening is arranged on the side wall of the closed end of the bone grafting tube main body, a bone grafting tube opening is arranged on the side wall of the open end of the bone grafting tube main body, and the bone grafting tube is fixedly connected with the bone grafting tube opening so as to convey a bone into the bone grafting tube main body through the bone grafting tube;
a core bar channel is arranged in the push rod, and one end of the push rod is positioned in the bone grafting tube main body;
the core rod is positioned in the core rod channel;
the bone grafting chain mechanism comprises a middle connecting assembly, a first end piece, a first flexible connecting piece, a second flexible connecting piece and a second end piece, wherein the second end piece is connected with one side of the bone grafting opening, which faces the core rod, the middle connecting assembly comprises (N-1) middle flexible connecting pieces and N joint pieces, two ends of each middle flexible connecting piece are respectively connected with the adjacent joint pieces, two ends of each first flexible connecting piece are respectively connected with one ends of the first end piece and the middle connecting assembly, two ends of each second flexible connecting piece are respectively connected with the other ends of the second end piece and the middle connecting assembly, joint piece stay wire through holes are formed in the joint pieces, stay wire fixing holes are formed in the first end piece, end piece stay wire through holes are formed in the second end piece, and the first flexible connecting piece, Flexible connecting piece stay wire through holes are formed in the middle flexible connecting piece and the second flexible connecting piece, wherein N is more than or equal to 2;
the pull wire mechanism comprises a pull wire control button and a pull wire, one end of the pull wire is fixed on the pull wire control button, the other end of the pull wire sequentially penetrates through the end piece pull wire through hole, the flexible connecting piece pull wire through hole and the joint piece pull wire through hole and is fixed on the pull wire fixing hole, and the pull wire control button is set to control the shape of the bone grafting chain mechanism by pulling the pull wire;
the sleeve mechanism comprises a sleeve, a bone grafting pipe channel is arranged in the sleeve, the open end of the bone grafting pipe main body is located in the bone grafting pipe channel, and the sleeve is located on one side, away from the bone grafting opening, of the body bone pipe opening.
Optionally, the bone grafting tube main part includes puncture section and bone grafting section, puncture section with bone grafting section threaded connection, the free end of puncture section has the scarf, the bone grafting opening is located on the puncture section, body bone tube opening is located on the bone grafting section.
Optionally, the body bone tube includes a connecting tube and an inlet funnel, and two ends of the connecting tube are respectively connected with the opening of the body bone tube and the inlet funnel.
Optionally, the core rod includes a core rod main body and a core rod handle, two ends of the core rod main body are respectively connected to the second end piece and the core rod handle, the core rod handle has a handle portion, and the handle portion has a size larger than the inner diameter of the core rod channel.
Optionally, the first flexible connecting piece, the middle flexible connecting piece and the second flexible connecting piece are compression springs, and the flexible connecting piece stay wire via hole is a middle channel of the compression spring;
the joint piece comprises a sleeve and a partition board, the partition board is located in the sleeve and divides the sleeve into two connecting cavities, the two connecting cavities are respectively connected with the two adjacent middle flexible connecting pieces, and the joint piece stay wire through hole is located in the partition board.
Optionally, the sleeve mechanism further comprises a handle, and the handle is fixedly connected with the outer surface of the sleeve.
Optionally, the vertebral body bone grafting device further comprises a core rod positioning mechanism;
the core rod positioning mechanism comprises an elastic piece and a positioning head, wherein the inner wall of the core rod channel is provided with a mounting groove, the elastic piece and the positioning head are both positioned in the mounting groove, the elastic piece is arranged to provide acting force towards the core rod for the positioning head, and the outer wall of the core rod is provided with a positioning groove;
when the core rod moves in the core rod channel until the positioning head is matched with the positioning groove, the end surface of the first end piece is flush with the opening of the core rod channel.
Optionally, the vertebral body bone grafting device further comprises a bone grafting tube positioning part;
the sleeve is provided with a positioning hole, and the bone grafting tube positioning piece penetrates through the positioning hole and abuts against the outer surface of the bone grafting tube main body so as to fix the bone grafting tube main body in the sleeve.
Optionally, the vertebral body bone grafting device further comprises a push rod moving mechanism;
the push rod moving mechanism comprises a support, a handle, a driving meshing part and a driven meshing part, the support is installed on the sleeve, the handle is rotatably connected with the support, the handle is fixedly connected with the driving meshing part, the driven meshing part is installed on the outer surface of the push rod, and the driving meshing part is meshed with the driven meshing part for transmission so as to push the push rod to move relative to the bone grafting tube main body and the sleeve.
Optionally, the push rod and the sleeve are in clearance fit;
the pull wire control button is installed on the support, and the pull wire penetrates through a gap between the push rod and the sleeve to be connected with the bone grafting chain mechanism.
This bone ware is planted to centrum promotes the push rod earlier when using, and the rethread core bar makes bone grafting chain mechanism stretch out from planting the bone opening in the removal of the core bar passageway of push rod, changes the elasticity degree of acting as go-between through the control button of acting as go-between after that and controls the shape of bone grafting chain mechanism for the bending angle of bone grafting chain mechanism changes, in order to clear up out the bone grafting space. Then the body bone is transmitted into the body bone tube main body through the body bone tube, and the body bone is pushed out of the bone grafting opening through the push rod or the bone grafting chain mechanism, so that the body bone enters the fractured vertebral body, and the treatment of vertebral body fracture is realized.
The vertebral body bone grafting device is simple to operate, the bone grafting space can be flexibly and accurately cleared through the bone grafting chain mechanism, and the bone grafting precision is high.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic view of a first use condition of an embodiment of a vertebral body bone implant according to the present disclosure.
Fig. 2 is a sectional view taken along line a-a in fig. 1.
Fig. 3 is a schematic view of a second use condition of an embodiment of the vertebral body bone implant of the present disclosure.
Fig. 4 is a partially enlarged view of fig. 3.
Fig. 5 is a schematic structural view of an embodiment of a bone grafting chain mechanism of the vertebral body bone grafting instrument of the present disclosure.
Fig. 6 is a schematic structural view of an articulation component of a bone grafting chain mechanism of the vertebral body bone grafting instrument of the present disclosure.
The figures are labeled as follows:
bone grafting tube mechanism-1, bone grafting tube main body-11, puncture section-111, bone grafting opening-1110, bone grafting section-112, bone grafting tube opening-1120, bone grafting tube-12, connecting tube-121, inlet funnel-122, push rod-2, core rod channel-21, mounting groove-210, core rod-3, core rod main body-31, core rod handle-32, handle part-320, bone grafting chain mechanism-4, middle flexible connecting piece-41, joint piece-42, sleeve-421, partition-422, joint piece guy wire through hole-4220, connecting cavity-423, first end piece-43, first flexible connecting piece-44, second flexible connecting piece-45, second end piece-46, guy wire mechanism-5 and guy wire control button-51, the bone grafting instrument comprises a stay wire-52, a sleeve mechanism-6, a sleeve-61, a bone grafting tube channel-610, a handle-62, a core rod positioning mechanism-7, an elastic piece-71, a positioning head-72, a bone grafting tube positioning piece-8, a push rod moving mechanism-9, a support-91, a handle-92, a driving meshing piece-93 and a driven meshing piece-94.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1 to 6, the present disclosure provides a vertebral body bone grafting device, comprising a bone grafting tube mechanism 1, a push rod 2, a core rod 3, a bone grafting chain mechanism 4, a wire pulling mechanism 5 and a cannula mechanism 6.
The bone grafting tube mechanism 1 comprises a bone grafting tube main body 11 and a bone grafting tube 12. One end of the main body 11 of the bone grafting tube is closed, and the other end of the main body 11 of the bone grafting tube is open. The closed end of the main body 11 can be closed by adding a plug or by welding a closing cap. The side wall of the closed end of the bone grafting tube main body 11 is provided with a bone grafting opening 1110. The bone grafting opening 1110 is used for the entry and exit of the bone grafting chain mechanism 4 or the extension of the body bone. A bone tube opening 1120 is provided on the sidewall of the open end of the bone grafting tube main body 11. The body bone duct 12 is fixedly connected with the body bone duct opening 1120 to transfer the body bone through the body bone duct 12 into the body bone duct main body 11. The fixed connection between the body bone tube 12 and the body bone tube opening 1120 can be achieved by welding or screwing. Generally, a certain angle can be formed between the bone grafting tube 12 and the bone grafting tube main body 11 to play a role of limiting the depth of the bone grafting tube mechanism 1 entering the human body.
A core rod channel 21 is arranged in the push rod 2. One end of the push rod 2 is positioned in the bone grafting tube main body 11. The push rod 2 can be in sliding fit or clearance fit with the bone grafting tube main body 11.
The core rod 3 is located in the core rod channel 21.
The bone graft chain mechanism 4 includes an intermediate connection assembly, a first end piece 43, a first flexible connector 44, a second flexible connector 45, and a second end piece 46. The second end 46 is connected to the side of the core rod 3 facing the bone grafting opening 1110, so that the movement of the core rod 3 can drive the second end 46 and the whole bone grafting chain mechanism 4 to move. The intermediate connecting assembly comprises (N-1) intermediate flexible connecting pieces 41 and N joint pieces 42, wherein N is more than or equal to 2. The two ends of each intermediate flexible connecting element 41 are respectively connected with the adjacent joint elements 42. The first flexible connector 44 is connected at both ends to the first end piece 43 and one end of the intermediate connection assembly, respectively. The second flexible connecting member 45 is connected at both ends thereof to the second end member 46 and the other end of the intermediate connecting member, respectively. The connection can be realized by welding or bolt connection. The joint 42 is provided with a joint stay wire through hole 4220. The first end piece 43 is provided with a wire fixing hole (not shown). The second end member 46 is provided with an end member wire passage hole (not shown). Flexible connector stay wire through holes are formed in the first flexible connector 44, the middle flexible connector 41 and the second flexible connector 45. The intermediate flexible connector 41, the first flexible connector 44 and the second flexible connector 45 may for example be springs or flexible pads or the like.
The first end piece 43 of the bone grafting chain mechanism 4 of the present disclosure is located at the most front end of the bone grafting chain mechanism 4, and the first end piece 43, the middle connecting component and the second end piece 46 are connected in sequence and can be connected in series through the pull wire 52. When the tightness of the pulling wire 52 is changed, the middle flexible connecting element 41, the first flexible connecting element 44 and the second flexible connecting element 45 can be elastically deformed, so that the length and the shape of the bone grafting chain mechanism 4 are changed, and the bone grafting chain mechanism 4, particularly the first end piece 43, can rotate in a larger angle range.
The wire pulling mechanism 5 includes a wire pulling control knob 51 and a wire pulling 52. One end of the pull wire 52 is fixed on the pull wire control button 51, and the other end of the pull wire 52 sequentially passes through the pull wire through hole of the end piece, the pull wire through hole of the flexible connecting piece and the pull wire through hole 4220 of the joint piece and is fixed on the pull wire fixing hole. The pull wire control button 51 is provided to control the shape of the bone graft chain mechanism 4 by pulling the pull wire 52. The wire control knob 51 may be mounted on the push rod 2 or the sleeve 61. Pull wire 52 may be routed through a gap between push rod 2 and sleeve 61, or between push rod 2 and stem 3, or may be routed internally within stem 3.
The sleeve mechanism 6 includes a sleeve 61. A bone graft passageway 610 is provided within the cannula 61. The open end of the main body 11 is located in the channel 610 of the bone graft, and the sleeve 61 is located on the side of the opening 1120 of the bone graft away from the opening 1110. Thus, the sleeve 61, the bone grafting tube main body 11, the push rod 2 and the core rod 3 are sequentially arranged from outside to inside.
This open centrum bone grafting ware promotes push rod 2 earlier when using, and the removal of rethread core bar 3 in the core bar passageway 21 of push rod 2 makes bone grafting chain mechanism 4 stretch out from bone grafting opening 1110, changes the elasticity degree of acting as go-between 52 through the control button 51 of acting as go-between after that and controls the shape of bone grafting chain mechanism 4 for the bending angle of bone grafting chain mechanism 4 changes, goes out the bone grafting space with the clearance. Then the body bone (autologous bone or allogeneic bone) is transmitted into the body bone tube main body 11 through the body bone tube 12, and the body bone is pushed out of the bone grafting opening 1110 through the push rod 2 or the bone grafting chain mechanism 4, so that the body bone enters the fractured vertebral body, and the treatment of the vertebral body fracture is realized.
The vertebral body bone grafting device is simple to operate, the bone grafting space can be flexibly and accurately cleared through the bone grafting chain mechanism 4, and the bone grafting precision is high.
In one embodiment of the vertebral body bone graft of the present disclosure, the bone graft body 11 includes a penetrating section 111 and a bone graft section 112. The puncture section 111 is in threaded connection with the bone grafting section 112. The free end of the piercing section 111 has a chamfered surface (the inclined surface of the chamfered surface is the closed end of the bone grafting tube main body 11). The bone grafting opening 1110 is located on the penetrating section 111, and the body bone tube opening 1120 is located on the bone grafting section 112.
The connection mode between the puncture section 111 and the bone grafting section 112 is threaded connection, so that the purpose of adjusting the length of the bone grafting main body 11 can be realized by adjusting the position of the puncture section 111 on the bone grafting section 112. The puncture depth of the bone grafting tube main body 11 can be adjusted by adjusting the length of the bone grafting main body 11. In addition, the threaded connection is also beneficial to adjusting the orientation of the bone grafting opening 1110 on the puncture section 111, thereby adjusting the bone grafting direction.
In one embodiment of the vertebral bone implant of the present disclosure, the body bone tube 12 includes a connecting tube 121 and an access funnel 122. The two ends of the connection tube 121 are connected to the body bone tube opening 1120 and the inlet funnel 122, respectively. In specific implementation, the connection tube 121 and the bone grafting tube main body 11 form an included angle (acute angle) to play a role in limiting the depth of the bone grafting tube mechanism 1 entering the human body. The opening of the inlet funnel 122 is oriented in a direction parallel to the axial direction of the main body 11 of the bone graft so as to guide the body bone into the main body 11 of the bone graft more smoothly.
In one embodiment of the vertebral bone implant of the present disclosure, the mandrel 3 comprises a mandrel body 31 and a mandrel pull 32. The two ends of the core rod body 31 are connected to the second end piece 46 and the core rod handle 32, respectively, and the connection can be achieved by welding or screwing. The stem pull 32 has a pull portion 320, and the pull portion 320 is sized larger than the inner diameter of the stem channel 21. The core rod handle 32 is provided to facilitate easier movement of the core rod body 31, and the handle portion 320 may act as a stop to prevent the core rod body 31 from completely entering the core rod channel 21.
In one embodiment of the vertebral bone implant of the present disclosure, the first flexible connector 44, the intermediate flexible connector 41 and the second flexible connector 45 are all compression springs, and the flexible connector stay wire vias are intermediate channels of the compression springs. The middle channel of the compression spring is a passage formed after the spring wire is encircled.
The knuckle 42 includes a sleeve 421 and a spacer 422. The edge of the sleeve 421 may be curved. A partition 422 is located within the sleeve 421 and divides the sleeve 421 into two connecting chambers 423. The two connecting cavities 423 are respectively connected with two adjacent intermediate flexible connectors 41. The connection between the intermediate flexible connector 41 and the connector 423 may be a scarf joint or a snap joint. The joint member pull wire through hole 4220 is positioned on the partition 422. Further, an articulation piece pull wire through hole 4220 may be located at the geometric center of the spacer 422 to more precisely control the shape of the bone graft chain mechanism 4.
In particular, the first end piece 43 may have a conical shape with a head having an arcuate surface for more flexible and safe cleaning out of the bone grafting space. The second end piece 46 may have a cylindrical configuration and the end piece wire through hole may be located on the central axis of the second end piece 46 to more precisely control the shape of the bone graft chain mechanism 4.
In one embodiment of the vertebral bone implant of the present disclosure, the cannula mechanism 6 further comprises a handle 62. The handle 62 is fixedly coupled to the outer surface of the sleeve 61 to more conveniently control the sleeve 61.
In one embodiment of the vertebral body implant of the present disclosure, the vertebral body implant further comprises a core rod positioning mechanism 7. The core rod positioning mechanism 7 includes an elastic member 71 and a positioning head 72. The inner wall of the core rod channel 21 is provided with a mounting groove, the elastic member 71 and the positioning head 72 are both positioned in the mounting groove, and the elastic member 71 can be used for providing acting force towards the core rod 3 for the positioning head 72. The outer wall of the core rod 3 is provided with a positioning groove. The elastic member 71 may be, for example, a spring plate or a spring. When the core rod 3 is moved within the core rod channel 21 until the positioning head 72 engages with the positioning groove, the end face of the first end piece 43 is flush with the opening of the core rod channel 21.
The vertebral body bone grafting device with the core rod positioning mechanism 7 is beneficial to controlling bone grafting more conveniently. Specifically, after the bone grafting space is cleared up by the bone grafting chain mechanism 4, the core rod 3 is pulled to drive the bone grafting chain mechanism 4 to move towards the direction away from the bone grafting opening 1110. When the positioning head 72 is engaged with the positioning groove, the bone graft chain mechanism 4 is completely inserted into the core rod passage 21, thereby preventing interference with the movement of the body bone within the main body 11 of the bone graft.
In specific implementation, the opening of the core rod channel 21 on the side adjacent to the bone grafting opening 1110 can be arranged to be flush with the side of the bone grafting tube opening 1120 far away from the bone grafting opening 1110, so that the structure of the vertebral body bone grafting device is more compact.
In one embodiment of the vertebral bone implant of the present disclosure, the vertebral bone implant further comprises a bone graft positioning member 8. The sleeve 61 is provided with a positioning hole, and the bone grafting tube positioning piece 8 passes through the positioning hole and abuts against the outer surface of the bone grafting tube main body 11 so as to fix the bone grafting tube main body 11 in the sleeve 61. The bone grafting tube positioning piece 8 can be matched with the positioning hole in a threaded manner. The bone grafting tube positioning piece 8 is beneficial to ensuring that the structure of the vertebral body bone grafting device is kept stable in the bone grafting process, thereby improving the bone grafting accuracy. During specific implementation, the vertebral body bone grafting device can be adjusted to a proper height through the matching of the bone grafting tube positioning part 8 and the bone grafting tube main body 11, and then the cleaning operation of the bone grafting space is carried out.
In one embodiment of the vertebral body implant of the present disclosure, the vertebral body implant further comprises a push rod moving mechanism 9. The push rod moving mechanism 9 includes a bracket 91, a handle 92, a driving engagement member 93, and a driven engagement member 94. The bracket 91 is mounted on the sleeve 61. The bracket 91 may be mounted on the end face of the sleeve 61. The handle 92 is rotatably connected to the bracket 91. A bearing may also be provided between the handle 92 and the bracket 91 to allow the handle 92 to rotate more smoothly relative to the bracket 91. The handle 92 is fixedly connected with the active engaging member 93, and the fixed connection between the handle and the active engaging member can be realized by key connection or welding. The driven engagement member 94 is mounted on the outer surface of the push rod 2. The driving engagement member 93 is engaged with the driven engagement member 94 for driving the push rod 2 to move relative to the bone graft main body 11 and the sleeve 61. By rotating the handle 92, the push rod 2 can be moved relative to the bone graft main body 11 and the sleeve 61.
The driving engagement member 93 and the driven engagement member 94 may be, for example, gears or racks, etc. In specific implementation, the driving engagement member 93 may be a gear, the driven engagement member 94 may be a rack provided on the push rod 2 by welding or integral molding, and the driven engagement member 94 may extend along the axial direction of the push rod 2.
The vertebral body bone grafting instrument with the push rod moving mechanism 9 is beneficial to controlling the bone grafting operation more accurately. In addition, when the driving engaging component 93 is engaged with the driven engaging component 94 for transmission, the push rod 2 can be pushed to move by rotating the handle 92; when the push rod 2 is rotated relative to the sleeve 61, the driving engagement member 93 and the driven engagement member 94 are disengaged, so that the push rod 2 can be controlled by means other than the handle 92.
Further, the push rod 2 and the sleeve 61 are in clearance fit. The wire control knob 51 is mounted on the bracket 91. The pull wire 52 passes through the gap between the push rod 2 and the sleeve 61 to be connected with the bone grafting chain mechanism 4. The structure of the vertebral body bone grafting device with the structure is more compact, the handle 92 can be controlled and the stay wire control button 51 can be controlled at the position of the bracket 91, and the operation is more convenient.
Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A vertebral body bone grafting device is characterized by comprising a bone grafting tube mechanism, a push rod, a core rod, a bone grafting chain mechanism, a wire pulling mechanism and a sleeve mechanism; wherein,
the bone grafting tube mechanism comprises a bone grafting tube main body and a bone grafting tube, one end of the bone grafting tube main body is closed, the other end of the bone grafting tube main body is open, a bone grafting opening is arranged on the side wall of the closed end of the bone grafting tube main body, a bone grafting tube opening is arranged on the side wall of the open end of the bone grafting tube main body, and the bone grafting tube is fixedly connected with the bone grafting tube opening so as to convey a bone into the bone grafting tube main body through the bone grafting tube;
a core bar channel is arranged in the push rod, and one end of the push rod is positioned in the bone grafting tube main body;
the core rod is positioned in the core rod channel;
the bone grafting chain mechanism comprises a middle connecting assembly, a first end piece, a first flexible connecting piece, a second flexible connecting piece and a second end piece, wherein the second end piece is connected with one side of the bone grafting opening, which faces the core rod, the middle connecting assembly comprises (N-1) middle flexible connecting pieces and N joint pieces, two ends of each middle flexible connecting piece are respectively connected with the adjacent joint pieces, two ends of each first flexible connecting piece are respectively connected with one ends of the first end piece and the middle connecting assembly, two ends of each second flexible connecting piece are respectively connected with the other ends of the second end piece and the middle connecting assembly, joint piece stay wire through holes are formed in the joint pieces, stay wire fixing holes are formed in the first end piece, end piece stay wire through holes are formed in the second end piece, and the first flexible connecting piece, Flexible connecting piece stay wire through holes are formed in the middle flexible connecting piece and the second flexible connecting piece, wherein N is more than or equal to 2;
the pull wire mechanism comprises a pull wire control button and a pull wire, one end of the pull wire is fixed on the pull wire control button, the other end of the pull wire sequentially penetrates through the end piece pull wire through hole, the flexible connecting piece pull wire through hole and the joint piece pull wire through hole and is fixed on the pull wire fixing hole, and the pull wire control button is set to control the shape of the bone grafting chain mechanism by pulling the pull wire;
the sleeve mechanism comprises a sleeve, a bone grafting pipe channel is arranged in the sleeve, the open end of the bone grafting pipe main body is located in the bone grafting pipe channel, and the sleeve is located on one side, away from the bone grafting opening, of the body bone pipe opening.
2. The vertebral bone grafting instrument of claim 1, wherein said bone grafting tube body comprises a puncturing section and a bone grafting section, said puncturing section is in threaded connection with said bone grafting section, the free end of said puncturing section has a chamfered surface, said bone grafting opening is located on said puncturing section, and said body bone tube opening is located on said bone grafting section.
3. The bone vertebral implant of claim 1 wherein said body bone tube comprises a connecting tube and an entry funnel, said connecting tube having two ends connected to said body bone tube opening and said entry funnel, respectively.
4. The vertebral bone implant of claim 1 wherein the core rod comprises a core rod body and a core rod pull, wherein the core rod body is connected to the second end piece and the core rod pull at both ends, the core rod pull has a pull portion, and the pull portion has a size larger than the inner diameter of the core rod passage.
5. The vertebral bone implant of claim 1 wherein said first flexible connector, said intermediate flexible connector and said second flexible connector are compression springs and said flexible connector cable vias are intermediate channels of said compression springs;
the joint piece comprises a sleeve and a partition board, the partition board is located in the sleeve and divides the sleeve into two connecting cavities, the two connecting cavities are respectively connected with the two adjacent middle flexible connecting pieces, and the joint piece stay wire through hole is located in the partition board.
6. The vertebral bone implant of claim 1 wherein said cannula mechanism further comprises a handle fixedly attached to an outer surface of said cannula.
7. The vertebral bone implant of claim 1 further comprising a core rod positioning mechanism;
the core rod positioning mechanism comprises an elastic piece and a positioning head, wherein the inner wall of the core rod channel is provided with a mounting groove, the elastic piece and the positioning head are both positioned in the mounting groove, the elastic piece is arranged to provide acting force towards the core rod for the positioning head, and the outer wall of the core rod is provided with a positioning groove;
when the core rod moves in the core rod channel until the positioning head is matched with the positioning groove, the end surface of the first end piece is flush with the opening of the core rod channel.
8. The vertebral bone implant of claim 1 further comprising a bone graft positioning member;
the sleeve is provided with a positioning hole, and the bone grafting tube positioning piece penetrates through the positioning hole and abuts against the outer surface of the bone grafting tube main body so as to fix the bone grafting tube main body in the sleeve.
9. The vertebral bone implant of any of claims 1 to 8, further comprising a push rod moving mechanism;
the push rod moving mechanism comprises a support, a handle, a driving meshing part and a driven meshing part, the support is installed on the sleeve, the handle is rotatably connected with the support, the handle is fixedly connected with the driving meshing part, the driven meshing part is installed on the outer surface of the push rod, and the driving meshing part is meshed with the driven meshing part for transmission so as to push the push rod to move relative to the bone grafting tube main body and the sleeve.
10. The vertebral bone implant of claim 9, wherein said push rod and said cannula are a clearance fit;
the pull wire control button is installed on the support, and the pull wire penetrates through a gap between the push rod and the sleeve to be connected with the bone grafting chain mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921544366.XU CN210871973U (en) | 2019-09-17 | 2019-09-17 | Centrum bone grafting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921544366.XU CN210871973U (en) | 2019-09-17 | 2019-09-17 | Centrum bone grafting device |
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| CN210871973U true CN210871973U (en) | 2020-06-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110478021A (en) * | 2019-09-17 | 2019-11-22 | 北京大学第三医院（北京大学第三临床医学院） | A kind of Vertebral body graft device |
| CN112022442A (en) * | 2020-09-11 | 2020-12-04 | 枣庄市立医院 | Bone grafting device for orthopedics clinic |
-
2019
- 2019-09-17 CN CN201921544366.XU patent/CN210871973U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110478021A (en) * | 2019-09-17 | 2019-11-22 | 北京大学第三医院（北京大学第三临床医学院） | A kind of Vertebral body graft device |
| CN110478021B (en) * | 2019-09-17 | 2024-03-22 | 北京大学第三医院（北京大学第三临床医学院） | Vertebral bone grafting device |
| CN112022442A (en) * | 2020-09-11 | 2020-12-04 | 枣庄市立医院 | Bone grafting device for orthopedics clinic |
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