CN208910458U - The installation tool of bone cement screw - Google Patents
The installation tool of bone cement screw Download PDFInfo
- Publication number
- CN208910458U CN208910458U CN201721806260.3U CN201721806260U CN208910458U CN 208910458 U CN208910458 U CN 208910458U CN 201721806260 U CN201721806260 U CN 201721806260U CN 208910458 U CN208910458 U CN 208910458U
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- bone cement
- inner sleeve
- cement screw
- rear end
- handle
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Abstract
The utility model provides a kind of installation tool of bone cement screw, bone cement screw includes ailhead and rivet nut, rivet nut is provided with centre bore along axial direction, installation tool includes outer tube, inner sleeve is equipped in outer tube, the front end of the outer tube is equipped with the external screw thread cooperated with bone cement screw ailhead, the front end of the inner sleeve is equipped with the turret head cooperated with bone cement screw rivet nut centre bore, the rear end of the inner sleeve and handle are cooperatively connected, handle is provided with through-hole along inner sleeve length direction, bar is blocked to penetrate from handle rear end and be pierced by from inner sleeve front end, the rear end for blocking bar and the rear end of handle are detachably connected.The utility model can prevent cancellous bone from blocking centre bore when bone cement screw is screwed into vertebra, reduce subsequent blocking cleaning work when being implanted into bone cement screw.
Description
Technical field
The utility model relates to spinal operation medical instrument more particularly to a kind of installation tools of bone cement screw.
Background technique
Currently, more and more sufferers of osteoporosis face need to carry out operation fixation because of spinal disease.
The fixed mainstream of spinal operation is screw-rod immobilization treatment；However in actual operation, because osteoporosis is tight
Ghost image rings the bond strength of nail bone interface, declines the holding power of bone screws, frequently results in bone screws and loosens, exits.Therefore, originally
Field technical staff has investigated bone cement screw, it is substituted to the pedicle of vertebral arch in tradition nail stick operation in spinal surgery
Screw prevents from loosening to effectively improve stability under the conditions of osteoporosis.
Existing bone cement screw design majority is the aperture in the rivet nut of screw, in order to inject bone cement, reinforces spiral shell
The bond strength of nail and sclerotin, however hollow bone cement screw, during being placed in vertebra, cancellous bone is readily along rivet nut
On bone cement hole squeeze into rivet nut, lead to the center hole plug of bone cement screw so that bone cement can not be successfully injection centrum, shadow
Ring the technical effect used.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of easy to use and operate, bone cement screw is effectively avoided
Center hole plug bone cement screw installation tool, to overcome the defect in the prior art.
In order to solve the above-mentioned technical problem, the utility model adopts the following technical solution: a kind of installation of bone cement screw
Tool, bone cement screw include ailhead and rivet nut, and rivet nut is provided with centre bore along axial direction, and installation tool includes outer tube, outer tube
In be equipped with inner sleeve, the front end of the outer tube is equipped with the external screw thread cooperated with bone cement screw ailhead, before the inner sleeve
End is equipped with the turret head cooperated with bone cement screw rivet nut centre bore, and the rear end of the inner sleeve and handle are cooperatively connected, handle
It is provided with through-hole along inner sleeve length direction, bar is blocked and penetrates from handle rear end and be pierced by from inner sleeve front end, block the front end of bar
It is inserted into the centre bore of bone cement screw rivet nut, the rear end of the closure bar and the rear end of handle are detachably connected.
Preferably, the rear end of the inner sleeve is equipped with card slot, and the handle includes interconnecting piece and driving portion, and interconnecting piece is circle
Cylindricality and it is provided with the mounting hole for installing inner sleeve along axial direction, is provided with through-hole perpendicular to mounting hole, is equipped with the decorative pearl on top of an official cap in through-hole,
Sliding sleeve is arranged on interconnecting piece, the sliding sleeve presses against the decorative pearl on top of an official cap in card slot.
Preferably, the rear end of the outer tube is equipped with swivel base.
Preferably, the rear end for blocking bar is threadedly coupled with the rear end of handle.
Preferably, the closure bar includes leading portion and back segment, and the diameter of the leading portion is less than the diameter of back segment, and leading portion
Length be less than back segment length.
As described above, the installation tool of the utility model bone cement screw, has the advantages that
When being implanted into bone cement screw, the centre bore by blocking bar and bone cement screw cooperates the utility model, can
Centre bore is blocked when bone cement screw is screwed into vertebra, prevents cancellous bone from blocking centre bore when bone cement screw is screwed into vertebra,
It brings great convenience to subsequent surgical procedure, avoids subsequent block clearing operation, ensure that working efficiency, and operate
Simply.
Detailed description of the invention
Fig. 1 is the topology view of the utility model.
Fig. 2 is the broken away view of the utility model.
Fig. 3 is the cross-sectional view of handle in the utility model.
Fig. 4 is the cooperation schematic diagram of the utility model and bone cement screw.
Fig. 5 is the cooperation cross-sectional view of the utility model and bone cement screw.
Fig. 6 is enlarged drawing at A in Fig. 5.
Fig. 7 is enlarged drawing at B in Fig. 5.
In figure:
1 outer tube, 2 inner sleeve
3 handles 4 block bar
11 swivel base, 21 card slot
31 interconnecting piece, 32 driving portion
33 decorative pearl on top of an official cap, 34 sliding sleeve
35 actuating sleeve, 36 spring
100 bone cement screw, 101 ailhead
102 rivet nut, 311 mounting hole
Specific embodiment
Structure depicted in Figure of description, ratio, size etc., only to cooperate the revealed content of specification, with
Understand for those skilled in the art and read, is not intended to limit the utility model enforceable qualifications, therefore does not have skill
Essential meaning in art, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the utility model institute
Under the effect of capable of generating and the purpose that can reach, the model that the revealed technology contents of the utility model can be covered should all be fallen in
In enclosing.Meanwhile cited such as "upper", "lower", "front", "rear", " centre " term in this specification, it is merely convenient to describe
Be illustrated, rather than to limit the enforceable range of the utility model, relativeness is altered or modified, without substantive change
Under technology contents, when being also considered as the enforceable scope of the utility model.
In conjunction with Fig. 1-Fig. 3, the utility model be a kind of bone cement screw installation tool, bone cement screw include ailhead and
Rivet nut, rivet nut are provided with centre bore along axial direction, and installation tool includes outer tube 1, are equipped with inner sleeve 2, the outer tube in outer tube 1
1 front end is equipped with the external screw thread cooperated with bone cement screw ailhead, and the front end of the inner sleeve 2 is equipped with and bone cement screw rivet nut
The turret head of centre bore cooperation, the rear end of the inner sleeve 2 and handle 3 are cooperatively connected, and handle 3 is provided with along inner sleeve length direction
Through-hole blocks bar 4 and penetrates from 3 rear end of handle and be pierced by from 2 front end of inner sleeve.The rear end of the rear end for blocking bar 4 and handle 3
It is detachably connected.When the utility model and bone cement screw cooperate, the front end for blocking bar 4 is inserted into bone cement screw rivet nut
Centre bore, i.e. closure bar 4 are adapted with the size of centre bore to realize plugging action.
With reference to Fig. 4 and Fig. 6, bone cement screw 100 includes ailhead 101 and rivet nut 102, and rivet nut 101 is provided with axial center
Hole and radial through-hole.In conjunction with Fig. 1-Fig. 7, the application method and principle of the utility model are:
(1) first inner sleeve 2 is inserted into cooperate in the centre bore of ailhead 101 and is stablized；The centre bore of inner sleeve 2 and ailhead 101
Generally cooperated using turret head, avoids relatively rotating.
(2) internal screw thread of the external screw thread and ailhead 101 of 1 front end of outer tube is threadedly engaged.
(3) rear end of inner sleeve 2 and handle 3 are cooperatively connected；Then bar 4 will be blocked to be inserted into from the rear end of handle 3, blocked
The front end of bar 4 is pierced by from the front end of inner sleeve 2 into the centre bore of rivet nut 102, and blocking 4 front end of bar cannot be from the centre bore
It is pierced by, blocking bar 4 is to play cancellous bone when preventing bone cement screw 100 from screwing in vertebra to enter in centre bore, it is ensured that later period bone
Cement is efficiently entering vertebra.
(4) Fig. 4 is referred to, is outer tube 1, inner sleeve 2, handle 3, blocks the signal after bar 4 and the cooperation of bone cement screw 100
Figure；In the predeterminated position of vertebra, bone cement screw 100 is implanted by rotational handle 3, if producing cancellous bone in implantation process,
Then because blocking the effect of bar 4, centre bore will not be entered.After being implanted into place, bar 4 will be blocked and removed from handle 3, made
The subsequent operations such as bone cement are filled into centre bore with the instrument of note bone cement.Last rotating jacket pipe 1 releases and bone cement spiral shell
The cooperation of nail 100, the utility model is removed.
In a preferred embodiment, in conjunction with Fig. 2, Fig. 3, Fig. 5 and Fig. 7, the rear end of the inner sleeve 2 is equipped with card slot 21, described
Handle 3 includes interconnecting piece 31 and driving portion 32, and interconnecting piece 31 is cylindrical and is provided with the peace for installing inner sleeve 2 along axial direction
Hole 311 is filled, through-hole is provided with perpendicular to mounting hole 311, the decorative pearl on top of an official cap 33 is equipped in through-hole, is arranged with sliding sleeve 34 on interconnecting piece 31, it is described
Sliding sleeve 34 presses against the decorative pearl on top of an official cap 33 in card slot 21.Specifically combine Fig. 3 and Fig. 7: sliding sleeve 34 is externally provided with actuating sleeve 35, and actuating sleeve 35 exists
The end of interconnecting piece 31 is inwardly formed boss, and axial setting spring 36 is equipped between actuating sleeve 35 and interconnecting piece 31, spring 36
One end is connected on boss, and the other end is connected on sliding sleeve 34, as arrow direction in Fig. 7 will drive when cooperating with inner sleeve 2
Dynamic set 35 moves to the right, and sliding sleeve 34 is no longer press against the decorative pearl on top of an official cap 33, and interconnecting piece 31, card slot 21 and the decorative pearl on top of an official cap 33 are inserted into 2 rear end of inner sleeve
Position is corresponding；Actuating sleeve 35 is unclamped, spring 36 drives actuating sleeve 35 and sliding sleeve 34 to spring back, and the decorative pearl on top of an official cap 33 is pressed into card slot by sliding sleeve 34
21, card slot 21 and 33 locking of the decorative pearl on top of an official cap realize the mating connection of inner sleeve 2 and handle 3.When dismantling inner sleeve 2, actuating sleeve 35 is to the right
Side is mobile, and inner sleeve 2 is extracted, then unclamps actuating sleeve 35 by the unlock of 33 position of the decorative pearl on top of an official cap.
As shown in Figure 1, the rear end of the outer tube 1 is equipped with transposase 11 1, it is convenient for operator's hand-held.
With reference to Fig. 2, in a preferred embodiment, the rear end for blocking bar 4 is threadedly coupled with the rear end of handle 3.
With reference to Fig. 2, the closure bar 4 includes leading portion and back segment, and the diameter of the leading portion is less than the diameter of back segment, and preceding
The length of section is less than the length of back segment.The diameter of back segment is bigger, and length is longer, can guarantee to block the whole intensity of bar 4, and preceding
Plugging action is played in the section mainly centre bore of insertion bone cement screw.
In conclusion the installation tool of the utility model bone cement screw, effectively overcomes some realities in the prior art
Border problem is to have very high utility value and use meaning.
Above embodiment is only illustrative of the principle and efficacy of the utility model, and not for limitation, this is practical new
Type.The utility model can be improved there are many more aspect under the premise of without prejudice to overall thought, for being familiar with this technology
Personage can all be carried out modifications and changes to above-described embodiment under the spirit and scope without prejudice to the utility model.Therefore,
Such as those of ordinary skill in the art is in spirit revealed without departing from the utility model and institute under technical idea
All equivalent modifications or change completed, should be covered by the claim of the utility model.
Claims (5)
1. a kind of installation tool of bone cement screw, bone cement screw include ailhead and rivet nut, rivet nut is provided with centre bore along axial direction,
It is characterized by: installation tool includes outer tube (1), inner sleeve (2) are equipped in outer tube (1), the front end of the outer tube (1)
Equipped with the external screw thread cooperated with bone cement screw ailhead, the front end of the inner sleeve (2) is equipped with and bone cement screw rivet nut center
The turret head of hole cooperation, the rear end and handle (3) of the inner sleeve (2) are cooperatively connected, and handle (3) is opened along inner sleeve length direction
There is through-hole, blocks bar (4) and penetrate from handle (3) rear end and be pierced by from inner sleeve (2) front end, the front end for blocking bar (4) can insert
Enter the centre bore of bone cement screw rivet nut, the rear end of closure bar (4) and the rear end of handle (3) are detachably connected.
2. the installation tool of bone cement screw according to claim 1, it is characterised in that: the rear end of the inner sleeve (2)
Equipped with card slot (21), the handle (3) includes interconnecting piece (31) and driving portion (32), and interconnecting piece (31) is cylindrical and along axis
To the mounting hole being provided with for installing inner sleeve (2), it is provided with through-hole perpendicular to mounting hole, is equipped with the decorative pearl on top of an official cap (33) in through-hole, connection
It is arranged in portion (31) sliding sleeve (34), the sliding sleeve (34) presses against the decorative pearl on top of an official cap (33) in card slot (21).
3. the installation tool of bone cement screw according to claim 1, it is characterised in that: the rear end of the outer tube (1)
Equipped with swivel base (11).
4. the installation tool of bone cement screw according to claim 1, it is characterised in that: the rear end for blocking bar (4)
It is threadedly coupled with the rear end of handle (3).
5. the installation tool of bone cement screw according to claim 1, it is characterised in that: before the closure bar (4) includes
Section and back segment, the diameter of the leading portion is less than the diameter of back segment, and the length of leading portion is less than the length of back segment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721806260.3U CN208910458U (en) | 2017-12-21 | 2017-12-21 | The installation tool of bone cement screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721806260.3U CN208910458U (en) | 2017-12-21 | 2017-12-21 | The installation tool of bone cement screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208910458U true CN208910458U (en) | 2019-05-31 |
Family
ID=66691350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721806260.3U Active CN208910458U (en) | 2017-12-21 | 2017-12-21 | The installation tool of bone cement screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208910458U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109938822A (en) * | 2017-12-21 | 2019-06-28 | 上海三友医疗器械股份有限公司 | The installation tool of bone cement screw |
-
2017
- 2017-12-21 CN CN201721806260.3U patent/CN208910458U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109938822A (en) * | 2017-12-21 | 2019-06-28 | 上海三友医疗器械股份有限公司 | The installation tool of bone cement screw |
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